* [syzbot] [gfs2?] memory leak in __kthread_create_on_node
@ 2026-01-30 14:23 syzbot
2026-02-03 10:01 ` Andreas Gruenbacher
0 siblings, 1 reply; 7+ messages in thread
From: syzbot @ 2026-01-30 14:23 UTC (permalink / raw)
To: agruenba, gfs2, linux-kernel, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: 8dfce8991b95 Merge tag 'pinctrl-v6.19-3' of git://git.kern..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14361322580000
kernel config: https://syzkaller.appspot.com/x/.config?x=9d7d0fbecb37bff8
dashboard link: https://syzkaller.appspot.com/bug?extid=aac438d7a1c44071e04b
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1409c644580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16121694580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/5812cc8b60db/disk-8dfce899.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/47a4b40e4e44/vmlinux-8dfce899.xz
kernel image: https://storage.googleapis.com/syzbot-assets/18e043c20056/bzImage-8dfce899.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/ebd5c2300445/mount_0.gz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=15765d8a580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+aac438d7a1c44071e04b@syzkaller.appspotmail.com
BUG: memory leak
unreferenced object 0xffff888125a2dec0 (size 32):
comm "syz.4.75", pid 6411, jiffies 4294948981
hex dump (first 32 bytes):
67 66 73 32 5f 6c 6f 67 64 2f 73 79 7a 3a 73 79 gfs2_logd/syz:sy
7a 2e 30 00 00 00 00 00 00 00 00 00 00 00 00 00 z.0.............
backtrace (crc d543dd03):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
__do_kmalloc_node mm/slub.c:5656 [inline]
__kmalloc_node_track_caller_noprof+0x47b/0x690 mm/slub.c:5768
kvasprintf+0x6e/0xf0 lib/kasprintf.c:25
__kthread_create_on_node+0x9e/0x1c0 kernel/kthread.c:519
kthread_create_on_node+0x73/0xa0 kernel/kthread.c:587
init_threads fs/gfs2/ops_fstype.c:1065 [inline]
gfs2_fill_super+0xdf8/0x1210 fs/gfs2/ops_fstype.c:1265
get_tree_bdev_flags+0x1c0/0x290 fs/super.c:1691
gfs2_get_tree+0x26/0xd0 fs/gfs2/ops_fstype.c:1332
vfs_get_tree+0x30/0x120 fs/super.c:1751
fc_mount fs/namespace.c:1199 [inline]
do_new_mount_fc fs/namespace.c:3636 [inline]
do_new_mount fs/namespace.c:3712 [inline]
path_mount+0x5a9/0x1350 fs/namespace.c:4022
do_mount fs/namespace.c:4035 [inline]
__do_sys_mount fs/namespace.c:4224 [inline]
__se_sys_mount fs/namespace.c:4201 [inline]
__x64_sys_mount+0x1a3/0x1e0 fs/namespace.c:4201
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff888126a2a300 (size 4480):
comm "kthreadd", pid 2, jiffies 4294948981
hex dump (first 32 bytes):
00 00 08 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 01 00 00 00 80 00 00 00 00 00 00 00 ................
backtrace (crc 4b33760e):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_node_noprof+0x422/0x590 mm/slub.c:5315
alloc_task_struct_node kernel/fork.c:184 [inline]
dup_task_struct kernel/fork.c:915 [inline]
copy_process+0x286/0x2870 kernel/fork.c:2052
kernel_clone+0xac/0x6e0 kernel/fork.c:2651
kernel_thread+0x80/0xb0 kernel/fork.c:2712
create_kthread kernel/kthread.c:486 [inline]
kthreadd+0x196/0x260 kernel/kthread.c:844
ret_from_fork+0x23c/0x320 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
BUG: memory leak
unreferenced object 0xffff888109c85180 (size 184):
comm "kthreadd", pid 2, jiffies 4294948981
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc c5f4f48b):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_noprof+0x412/0x580 mm/slub.c:5270
prepare_creds+0x22/0x600 kernel/cred.c:185
copy_creds+0x44/0x290 kernel/cred.c:286
copy_process+0x7a7/0x2870 kernel/fork.c:2086
kernel_clone+0xac/0x6e0 kernel/fork.c:2651
kernel_thread+0x80/0xb0 kernel/fork.c:2712
create_kthread kernel/kthread.c:486 [inline]
kthreadd+0x196/0x260 kernel/kthread.c:844
ret_from_fork+0x23c/0x320 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
BUG: memory leak
unreferenced object 0xffff888102bd9780 (size 32):
comm "kthreadd", pid 2, jiffies 4294948981
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
f8 52 86 00 81 88 ff ff 00 00 00 00 00 00 00 00 .R..............
backtrace (crc 336e1c5f):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
__do_kmalloc_node mm/slub.c:5656 [inline]
__kmalloc_noprof+0x465/0x680 mm/slub.c:5669
kmalloc_noprof include/linux/slab.h:961 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
lsm_blob_alloc+0x4d/0x80 security/security.c:192
lsm_cred_alloc security/security.c:209 [inline]
security_prepare_creds+0x2d/0x290 security/security.c:2763
prepare_creds+0x395/0x600 kernel/cred.c:215
copy_creds+0x44/0x290 kernel/cred.c:286
copy_process+0x7a7/0x2870 kernel/fork.c:2086
kernel_clone+0xac/0x6e0 kernel/fork.c:2651
kernel_thread+0x80/0xb0 kernel/fork.c:2712
create_kthread kernel/kthread.c:486 [inline]
kthreadd+0x196/0x260 kernel/kthread.c:844
ret_from_fork+0x23c/0x320 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
BUG: memory leak
unreferenced object 0xffff8881098abc00 (size 192):
comm "kthreadd", pid 2, jiffies 4294948981
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff ................
01 00 00 00 00 00 00 00 80 d5 78 82 ff ff ff ff ..........x.....
backtrace (crc 1df624ea):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
__kmalloc_cache_noprof+0x41a/0x590 mm/slub.c:5775
kmalloc_noprof include/linux/slab.h:957 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
set_kthread_struct+0x58/0x150 kernel/kthread.c:125
copy_process+0x1569/0x2870 kernel/fork.c:2150
kernel_clone+0xac/0x6e0 kernel/fork.c:2651
kernel_thread+0x80/0xb0 kernel/fork.c:2712
create_kthread kernel/kthread.c:486 [inline]
kthreadd+0x196/0x260 kernel/kthread.c:844
ret_from_fork+0x23c/0x320 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
BUG: memory leak
unreferenced object 0xffff88812baec5c0 (size 64):
comm "kthreadd", pid 2, jiffies 4294948981
hex dump (first 32 bytes):
e0 35 8f 89 ff ff ff ff 00 00 00 00 00 00 00 00 .5..............
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 8e7806b9):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
__do_kmalloc_node mm/slub.c:5656 [inline]
__kmalloc_noprof+0x465/0x680 mm/slub.c:5669
kmalloc_noprof include/linux/slab.h:961 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
lsm_blob_alloc+0x4d/0x80 security/security.c:192
lsm_task_alloc security/security.c:244 [inline]
security_task_alloc+0x2a/0x260 security/security.c:2682
copy_process+0xf07/0x2870 kernel/fork.c:2203
kernel_clone+0xac/0x6e0 kernel/fork.c:2651
kernel_thread+0x80/0xb0 kernel/fork.c:2712
create_kthread kernel/kthread.c:486 [inline]
kthreadd+0x196/0x260 kernel/kthread.c:844
ret_from_fork+0x23c/0x320 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
BUG: memory leak
unreferenced object 0xffff888101e37a80 (size 1152):
comm "kthreadd", pid 2, jiffies 4294948981
hex dump (first 32 bytes):
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
90 7a e3 01 81 88 ff ff 90 7a e3 01 81 88 ff ff .z.......z......
backtrace (crc 1d024e88):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_noprof+0x412/0x580 mm/slub.c:5270
copy_signal kernel/fork.c:1699 [inline]
copy_process+0x1102/0x2870 kernel/fork.c:2218
kernel_clone+0xac/0x6e0 kernel/fork.c:2651
kernel_thread+0x80/0xb0 kernel/fork.c:2712
create_kthread kernel/kthread.c:486 [inline]
kthreadd+0x196/0x260 kernel/kthread.c:844
ret_from_fork+0x23c/0x320 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [syzbot] [gfs2?] memory leak in __kthread_create_on_node
[not found] <20260130143741.67498-1-kartikey406@gmail.com>
@ 2026-01-30 15:20 ` syzbot
0 siblings, 0 replies; 7+ messages in thread
From: syzbot @ 2026-01-30 15:20 UTC (permalink / raw)
To: kartikey406, linux-kernel, syzkaller-bugs
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
memory leak in gfs2_quota_init
BUG: memory leak
unreferenced object 0xffff88812de7c000 (size 8192):
comm "syz.6.189", pid 7764, jiffies 4294962014
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 8429a099):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
__do_kmalloc_node mm/slub.c:5656 [inline]
__kmalloc_noprof+0x465/0x680 mm/slub.c:5669
kmalloc_noprof include/linux/slab.h:961 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
gfs2_quota_init+0xe5/0x820 fs/gfs2/quota.c:1409
gfs2_make_fs_rw+0x7a/0xe0 fs/gfs2/super.c:149
gfs2_fill_super+0xfbb/0x1240 fs/gfs2/ops_fstype.c:1275
get_tree_bdev_flags+0x1c0/0x290 fs/super.c:1691
gfs2_get_tree+0x26/0xd0 fs/gfs2/ops_fstype.c:1334
vfs_get_tree+0x30/0x120 fs/super.c:1751
fc_mount fs/namespace.c:1199 [inline]
do_new_mount_fc fs/namespace.c:3636 [inline]
do_new_mount fs/namespace.c:3712 [inline]
path_mount+0x5a9/0x1350 fs/namespace.c:4022
do_mount fs/namespace.c:4035 [inline]
__do_sys_mount fs/namespace.c:4224 [inline]
__se_sys_mount fs/namespace.c:4201 [inline]
__x64_sys_mount+0x1a3/0x1e0 fs/namespace.c:4201
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF
Tested on:
commit: 4d310797 Merge tag 'pm-6.19-rc8' of git://git.kernel.o..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10ccc802580000
kernel config: https://syzkaller.appspot.com/x/.config?x=9d7d0fbecb37bff8
dashboard link: https://syzkaller.appspot.com/bug?extid=aac438d7a1c44071e04b
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
patch: https://syzkaller.appspot.com/x/patch.diff?x=116fb38a580000
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [syzbot] [gfs2?] memory leak in __kthread_create_on_node
[not found] <20260131023756.72030-1-kartikey406@gmail.com>
@ 2026-01-31 5:22 ` syzbot
0 siblings, 0 replies; 7+ messages in thread
From: syzbot @ 2026-01-31 5:22 UTC (permalink / raw)
To: kartikey406, linux-kernel, syzkaller-bugs
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
memory leak in gfs2_trans_begin
BUG: memory leak
unreferenced object 0xffff8881298e2480 (size 144):
comm "syz.6.189", pid 7630, jiffies 4294961882
hex dump (first 32 bytes):
ba 2d 7a 82 ff ff ff ff 05 00 00 00 00 00 00 00 .-z.............
0b 00 00 00 00 00 00 00 06 00 00 00 00 00 00 00 ................
backtrace (crc 61a3a826):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_noprof+0x412/0x580 mm/slub.c:5270
gfs2_trans_begin+0x29/0xa0 fs/gfs2/trans.c:120
alloc_dinode fs/gfs2/inode.c:432 [inline]
gfs2_create_inode+0xbfa/0x17f0 fs/gfs2/inode.c:822
gfs2_atomic_open+0x96/0x190 fs/gfs2/inode.c:1402
atomic_open fs/namei.c:4304 [inline]
lookup_open fs/namei.c:4415 [inline]
open_last_lookups fs/namei.c:4549 [inline]
path_openat+0x158f/0x20f0 fs/namei.c:4793
do_filp_open+0x104/0x1f0 fs/namei.c:4823
do_sys_openat2+0xcb/0x180 fs/open.c:1430
do_sys_open fs/open.c:1436 [inline]
__do_sys_open fs/open.c:1444 [inline]
__se_sys_open fs/open.c:1440 [inline]
__x64_sys_open+0x7e/0xf0 fs/open.c:1440
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF
Tested on:
commit: ad9a728a Merge tag 'for-linus-iommufd' of git://git.ke..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13c94e94580000
kernel config: https://syzkaller.appspot.com/x/.config?x=9d7d0fbecb37bff8
dashboard link: https://syzkaller.appspot.com/bug?extid=aac438d7a1c44071e04b
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
patch: https://syzkaller.appspot.com/x/patch.diff?x=145aa252580000
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [syzbot] [gfs2?] memory leak in __kthread_create_on_node
2026-01-30 14:23 syzbot
@ 2026-02-03 10:01 ` Andreas Gruenbacher
2026-02-03 13:35 ` syzbot
0 siblings, 1 reply; 7+ messages in thread
From: Andreas Gruenbacher @ 2026-02-03 10:01 UTC (permalink / raw)
To: syzbot; +Cc: gfs2, linux-kernel, syzkaller-bugs
#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git
for-next
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [syzbot] [gfs2?] memory leak in __kthread_create_on_node
2026-02-03 10:01 ` Andreas Gruenbacher
@ 2026-02-03 13:35 ` syzbot
0 siblings, 0 replies; 7+ messages in thread
From: syzbot @ 2026-02-03 13:35 UTC (permalink / raw)
To: agruenba, gfs2, linux-kernel, syzkaller-bugs
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
: port 1(bridge_slave_0) entered blocking state
[ 49.569526][ T5894] bridge0: port 1(bridge_slave_0) entered disabled state
[ 49.577272][ T5894] bridge_slave_0: entered allmulticast mode
[ 49.583706][ T5894] bridge_slave_0: entered promiscuous mode
[ 49.596953][ T5894] bridge0: port 2(bridge_slave_1) entered blocking state
[ 49.604391][ T5894] bridge0: port 2(bridge_slave_1) entered disabled state
[ 49.611600][ T5894] bridge_slave_1: entered allmulticast mode
[ 49.618015][ T5894] bridge_slave_1: entered promiscuous mode
[ 49.628063][ T5894] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 49.638158][ T5894] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 49.651127][ T5894] team0: Port device team_slave_0 added
[ 49.657258][ T5894] team0: Port device team_slave_1 added
[ 49.666478][ T5894] batman_adv: batadv0: Adding interface: batadv_slave_0
[ 49.673408][ T5894] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[ 49.699306][ T5894] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[ 49.710247][ T5894] batman_adv: batadv0: Adding interface: batadv_slave_1
[ 49.717331][ T5894] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[ 49.743223][ T5894] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[ 49.761247][ T5894] hsr_slave_0: entered promiscuous mode
[ 49.767053][ T5894] hsr_slave_1: entered promiscuous mode
[ 49.796552][ T5894] netdevsim netdevsim5 netdevsim0: renamed from eth0
[ 49.806103][ T5894] netdevsim netdevsim5 netdevsim1: renamed from eth1
[ 49.813706][ T5894] netdevsim netdevsim5 netdevsim2: renamed from eth2
[ 49.821484][ T5894] netdevsim netdevsim5 netdevsim3: renamed from eth3
[ 49.833675][ T5894] bridge0: port 2(bridge_slave_1) entered blocking state
[ 49.840885][ T5894] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 49.848233][ T5894] bridge0: port 1(bridge_slave_0) entered blocking state
[ 49.855361][ T5894] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 49.874093][ T5894] 8021q: adding VLAN 0 to HW filter on device bond0
[ 49.883306][ T31] bridge0: port 1(bridge_slave_0) entered disabled state
[ 49.890757][ T31] bridge0: port 2(bridge_slave_1) entered disabled state
[ 49.899998][ T5894] 8021q: adding VLAN 0 to HW filter on device team0
[ 49.908475][ T4273] bridge0: port 1(bridge_slave_0) entered blocking state
[ 49.915629][ T4273] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 49.926439][ T31] bridge0: port 2(bridge_slave_1) entered blocking state
[ 49.933487][ T31] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 49.976870][ T5894] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 50.019341][ T5894] veth0_vlan: entered promiscuous mode
[ 50.027485][ T5894] veth1_vlan: entered promiscuous mode
[ 50.037907][ T5894] veth0_macvtap: entered promiscuous mode
[ 50.045065][ T5894] veth1_macvtap: entered promiscuous mode
[ 50.053367][ T5894] batman_adv: batadv0: Interface activated: batadv_slave_0
[ 50.062517][ T5894] batman_adv: batadv0: Interface activated: batadv_slave_1
2026/02/03 13:34:00 executed programs: 0
[ 50.071587][ T31] netdevsim netdevsim5 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[ 50.080766][ T31] netdevsim netdevsim5 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[ 50.089873][ T31] netdevsim netdevsim5 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[ 50.098962][ T31] netdevsim netdevsim5 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[ 50.146631][ T51] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[ 50.153698][ T51] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[ 50.161549][ T51] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[ 50.169537][ T51] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[ 50.176954][ T51] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[ 50.211055][ T5935] chnl_net:caif_netlink_parms(): no params data found
[ 50.232507][ T5935] bridge0: port 1(bridge_slave_0) entered blocking state
[ 50.239849][ T5935] bridge0: port 1(bridge_slave_0) entered disabled state
[ 50.247221][ T5935] bridge_slave_0: entered allmulticast mode
[ 50.253454][ T5935] bridge_slave_0: entered promiscuous mode
[ 50.260028][ T5935] bridge0: port 2(bridge_slave_1) entered blocking state
[ 50.267129][ T5935] bridge0: port 2(bridge_slave_1) entered disabled state
[ 50.274406][ T5935] bridge_slave_1: entered allmulticast mode
[ 50.280561][ T5935] bridge_slave_1: entered promiscuous mode
[ 50.291387][ T5935] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 50.301433][ T5935] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 50.315273][ T5935] team0: Port device team_slave_0 added
[ 50.321623][ T5935] team0: Port device team_slave_1 added
[ 50.331276][ T5935] batman_adv: batadv0: Adding interface: batadv_slave_0
[ 50.338331][ T5935] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[ 50.364309][ T5935] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[ 50.375554][ T5935] batman_adv: batadv0: Adding interface: batadv_slave_1
[ 50.382485][ T5935] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[ 50.408696][ T5935] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[ 50.426057][ T5935] hsr_slave_0: entered promiscuous mode
[ 50.431913][ T5935] hsr_slave_1: entered promiscuous mode
[ 50.437731][ T5935] debugfs: 'hsr0' already exists in 'hsr'
[ 50.443458][ T5935] Cannot create hsr debugfs directory
[ 50.471333][ T5935] netdevsim netdevsim0 netdevsim0: renamed from eth0
[ 50.479234][ T5935] netdevsim netdevsim0 netdevsim1: renamed from eth1
[ 50.486892][ T5935] netdevsim netdevsim0 netdevsim2: renamed from eth2
[ 50.494636][ T5935] netdevsim netdevsim0 netdevsim3: renamed from eth3
[ 50.506883][ T5935] bridge0: port 2(bridge_slave_1) entered blocking state
[ 50.513937][ T5935] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 50.521151][ T5935] bridge0: port 1(bridge_slave_0) entered blocking state
[ 50.528314][ T5935] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 50.546104][ T5935] 8021q: adding VLAN 0 to HW filter on device bond0
[ 50.555923][ T1028] bridge0: port 1(bridge_slave_0) entered disabled state
[ 50.563234][ T1028] bridge0: port 2(bridge_slave_1) entered disabled state
[ 50.572397][ T5935] 8021q: adding VLAN 0 to HW filter on device team0
[ 50.580932][ T4273] bridge0: port 1(bridge_slave_0) entered blocking state
[ 50.587999][ T4273] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 50.597473][ T1028] bridge0: port 2(bridge_slave_1) entered blocking state
[ 50.604528][ T1028] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 50.647463][ T5935] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 50.662929][ T5935] veth0_vlan: entered promiscuous mode
[ 50.670959][ T5935] veth1_vlan: entered promiscuous mode
[ 50.681606][ T5935] veth0_macvtap: entered promiscuous mode
[ 50.688740][ T5935] veth1_macvtap: entered promiscuous mode
[ 50.697748][ T5935] batman_adv: batadv0: Interface activated: batadv_slave_0
[ 50.707515][ T5935] batman_adv: batadv0: Interface activated: batadv_slave_1
[ 50.716544][ T4273] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[ 50.725515][ T4273] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[ 50.734628][ T4273] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[ 50.744542][ T4273] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[ 50.762892][ T4273] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 50.771050][ T4273] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[ 50.781621][ T31] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 50.789850][ T31] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[ 50.879037][ T31] netdevsim netdevsim5 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 50.915713][ T31] netdevsim netdevsim5 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 51.004863][ T31] netdevsim netdevsim5 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 51.074863][ T31] netdevsim netdevsim5 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 52.016178][ T31] bridge_slave_1: left allmulticast mode
[ 52.021837][ T31] bridge_slave_1: left promiscuous mode
[ 52.027571][ T31] bridge0: port 2(bridge_slave_1) entered disabled state
[ 52.035331][ T31] bridge_slave_0: left allmulticast mode
[ 52.040954][ T31] bridge_slave_0: left promiscuous mode
[ 52.046653][ T31] bridge0: port 1(bridge_slave_0) entered disabled state
[ 52.106207][ T31] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[ 52.115467][ T31] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[ 52.125163][ T31] bond0 (unregistering): Released all slaves
[ 52.193847][ T31] hsr_slave_0: left promiscuous mode
[ 52.200333][ T31] hsr_slave_1: left promiscuous mode
[ 52.206079][ T31] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[ 52.213540][ T31] batman_adv: batadv0: Removing interface: batadv_slave_0
[ 52.221223][ T31] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[ 52.228932][ T31] batman_adv: batadv0: Removing interface: batadv_slave_1
[ 52.237267][ T31] veth1_macvtap: left promiscuous mode
[ 52.242816][ T31] veth0_macvtap: left promiscuous mode
[ 52.248610][ T31] veth1_vlan: left promiscuous mode
[ 52.253921][ T31] veth0_vlan: left promiscuous mode
[ 52.277608][ T31] team0 (unregistering): Port device team_slave_1 removed
[ 52.286132][ T31] team0 (unregistering): Port device team_slave_0 removed
[ 52.766136][ T1028] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 54.465080][ T1028] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 54.525147][ T1028] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 54.565331][ T1028] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 54.639649][ T1028] bridge_slave_1: left allmulticast mode
[ 54.645358][ T1028] bridge_slave_1: left promiscuous mode
[ 54.651032][ T1028] bridge0: port 2(bridge_slave_1) entered disabled state
[ 54.658760][ T1028] bridge_slave_0: left allmulticast mode
[ 54.664566][ T1028] bridge_slave_0: left promiscuous mode
[ 54.670254][ T1028] bridge0: port 1(bridge_slave_0) entered disabled state
[ 54.726139][ T1028] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[ 54.735307][ T1028] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[ 54.744759][ T1028] bond0 (unregistering): Released all slaves
[ 54.858073][ T1028] hsr_slave_0: left promiscuous mode
[ 54.865227][ T1028] hsr_slave_1: left promiscuous mode
[ 54.870765][ T1028] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[ 54.878359][ T1028] batman_adv: batadv0: Removing interface: batadv_slave_0
[ 54.886112][ T1028] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[ 54.893489][ T1028] batman_adv: batadv0: Removing interface: batadv_slave_1
[ 54.903185][ T1028] veth1_macvtap: left promiscuous mode
[ 54.908932][ T1028] veth0_macvtap: left promiscuous mode
[ 54.914513][ T1028] veth1_vlan: left promiscuous mode
[ 54.919924][ T1028] veth0_vlan: left promiscuous mode
[ 54.943530][ T1028] team0 (unregistering): Port device team_slave_1 removed
[ 54.952050][ T1028] team0 (unregistering): Port device team_slave_0 removed
syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build3933183977=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.24.4'
GOWORK=''
PKG_CONFIG='pkg-config'
git status (err=<nil>)
HEAD detached at b78a734197
nothing to commit, working tree clean
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=b78a7341979245ec72840af68695cb23b98dc2cb -X github.com/google/syzkaller/prog.gitRevisionDate=20260128-224926" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=b78a7341979245ec72840af68695cb23b98dc2cb -X github.com/google/syzkaller/prog.gitRevisionDate=20260128-224926" ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=b78a7341979245ec72840af68695cb23b98dc2cb -X github.com/google/syzkaller/prog.gitRevisionDate=20260128-224926" -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"b78a7341979245ec72840af68695cb23b98dc2cb\"
/usr/bin/ld: /tmp/ccJgQDSd.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x386): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
./tools/check-syzos.sh 2>/dev/null
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=10e0c402580000
Tested on:
commit: da6f5bbc gfs2: fix memory leaks in gfs2_fill_super err..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git for-next
kernel config: https://syzkaller.appspot.com/x/.config?x=9d7d0fbecb37bff8
dashboard link: https://syzkaller.appspot.com/bug?extid=aac438d7a1c44071e04b
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
Note: no patches were applied.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [syzbot] [gfs2?] memory leak in __kthread_create_on_node
[not found] <CAHc6FU5FACWy-y-t=qEyMsJHSv5D7A9XgYMdxbDh1S0tgz=kQg@mail.gmail.com>
@ 2026-02-04 12:07 ` syzbot
0 siblings, 0 replies; 7+ messages in thread
From: syzbot @ 2026-02-04 12:07 UTC (permalink / raw)
To: agruenba, linux-kernel, syzkaller-bugs
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
if you depend on this functionality.
[ 45.821207][ T31] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 45.829090][ T31] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[ 45.881225][ T31] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 45.889807][ T31] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[ 45.956122][ T5884] chnl_net:caif_netlink_parms(): no params data found
[ 46.001794][ T5884] bridge0: port 1(bridge_slave_0) entered blocking state
[ 46.008977][ T5884] bridge0: port 1(bridge_slave_0) entered disabled state
[ 46.016232][ T5884] bridge_slave_0: entered allmulticast mode
[ 46.022616][ T5884] bridge_slave_0: entered promiscuous mode
[ 46.035205][ T5884] bridge0: port 2(bridge_slave_1) entered blocking state
[ 46.042381][ T5884] bridge0: port 2(bridge_slave_1) entered disabled state
[ 46.053377][ T5884] bridge_slave_1: entered allmulticast mode
[ 46.059638][ T5884] bridge_slave_1: entered promiscuous mode
[ 46.071403][ T5884] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 46.081415][ T5884] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 46.095160][ T5884] team0: Port device team_slave_0 added
[ 46.101434][ T5884] team0: Port device team_slave_1 added
[ 46.110592][ T5884] batman_adv: batadv0: Adding interface: batadv_slave_0
[ 46.117771][ T5884] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[ 46.143797][ T5884] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[ 46.156685][ T5884] batman_adv: batadv0: Adding interface: batadv_slave_1
[ 46.163621][ T5884] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[ 46.189517][ T5884] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[ 46.206156][ T5884] hsr_slave_0: entered promiscuous mode
[ 46.211900][ T5884] hsr_slave_1: entered promiscuous mode
[ 46.241105][ T5884] netdevsim netdevsim2 netdevsim0: renamed from eth0
[ 46.249140][ T5884] netdevsim netdevsim2 netdevsim1: renamed from eth1
[ 46.257221][ T5884] netdevsim netdevsim2 netdevsim2: renamed from eth2
[ 46.264770][ T5884] netdevsim netdevsim2 netdevsim3: renamed from eth3
[ 46.276497][ T5884] bridge0: port 2(bridge_slave_1) entered blocking state
[ 46.283532][ T5884] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 46.290811][ T5884] bridge0: port 1(bridge_slave_0) entered blocking state
[ 46.297848][ T5884] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 46.316050][ T5884] 8021q: adding VLAN 0 to HW filter on device bond0
[ 46.325293][ T3579] bridge0: port 1(bridge_slave_0) entered disabled state
[ 46.332550][ T3579] bridge0: port 2(bridge_slave_1) entered disabled state
[ 46.341998][ T5884] 8021q: adding VLAN 0 to HW filter on device team0
[ 46.350374][ T1114] bridge0: port 1(bridge_slave_0) entered blocking state
[ 46.357414][ T1114] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 46.366267][ T3579] bridge0: port 2(bridge_slave_1) entered blocking state
[ 46.373305][ T3579] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 46.413150][ T5884] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 46.428418][ T5884] veth0_vlan: entered promiscuous mode
[ 46.435468][ T5884] veth1_vlan: entered promiscuous mode
[ 46.446016][ T5884] veth0_macvtap: entered promiscuous mode
[ 46.452649][ T5884] veth1_macvtap: entered promiscuous mode
2026/02/04 12:06:36 executed programs: 0
[ 46.461883][ T5884] batman_adv: batadv0: Interface activated: batadv_slave_0
[ 46.470956][ T5884] batman_adv: batadv0: Interface activated: batadv_slave_1
[ 46.480049][ T1114] netdevsim netdevsim2 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[ 46.488812][ T1114] netdevsim netdevsim2 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[ 46.497918][ T1114] netdevsim netdevsim2 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[ 46.508096][ T4665] netdevsim netdevsim2 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[ 46.549979][ T50] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1
[ 46.557068][ T50] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9
[ 46.564078][ T50] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9
[ 46.571338][ T50] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4
[ 46.579355][ T50] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2
[ 46.614569][ T5926] chnl_net:caif_netlink_parms(): no params data found
[ 46.633881][ T5926] bridge0: port 1(bridge_slave_0) entered blocking state
[ 46.641080][ T5926] bridge0: port 1(bridge_slave_0) entered disabled state
[ 46.648578][ T5926] bridge_slave_0: entered allmulticast mode
[ 46.654971][ T5926] bridge_slave_0: entered promiscuous mode
[ 46.663809][ T5926] bridge0: port 2(bridge_slave_1) entered blocking state
[ 46.671026][ T5926] bridge0: port 2(bridge_slave_1) entered disabled state
[ 46.678273][ T5926] bridge_slave_1: entered allmulticast mode
[ 46.684428][ T5926] bridge_slave_1: entered promiscuous mode
[ 46.695255][ T5926] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 46.705763][ T5926] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 46.718720][ T5926] team0: Port device team_slave_0 added
[ 46.725342][ T5926] team0: Port device team_slave_1 added
[ 46.734410][ T5926] batman_adv: batadv0: Adding interface: batadv_slave_0
[ 46.741923][ T5926] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[ 46.768097][ T5926] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[ 46.779874][ T5926] batman_adv: batadv0: Adding interface: batadv_slave_1
[ 46.786899][ T5926] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1532 would solve the problem.
[ 46.813288][ T5926] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[ 46.831416][ T5926] hsr_slave_0: entered promiscuous mode
[ 46.837206][ T5926] hsr_slave_1: entered promiscuous mode
[ 46.842860][ T5926] debugfs: 'hsr0' already exists in 'hsr'
[ 46.848803][ T5926] Cannot create hsr debugfs directory
[ 46.876513][ T5926] netdevsim netdevsim0 netdevsim0: renamed from eth0
[ 46.884169][ T5926] netdevsim netdevsim0 netdevsim1: renamed from eth1
[ 46.891891][ T5926] netdevsim netdevsim0 netdevsim2: renamed from eth2
[ 46.899508][ T5926] netdevsim netdevsim0 netdevsim3: renamed from eth3
[ 46.921123][ T5926] 8021q: adding VLAN 0 to HW filter on device bond0
[ 46.931215][ T5926] 8021q: adding VLAN 0 to HW filter on device team0
[ 46.939622][ T4665] bridge0: port 1(bridge_slave_0) entered blocking state
[ 46.946671][ T4665] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 46.956230][ T4665] bridge0: port 2(bridge_slave_1) entered blocking state
[ 46.963273][ T4665] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 47.003047][ T5926] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 47.018146][ T5926] veth0_vlan: entered promiscuous mode
[ 47.025562][ T5926] veth1_vlan: entered promiscuous mode
[ 47.036300][ T5926] veth0_macvtap: entered promiscuous mode
[ 47.043136][ T5926] veth1_macvtap: entered promiscuous mode
[ 47.051969][ T5926] batman_adv: batadv0: Interface activated: batadv_slave_0
[ 47.061005][ T5926] batman_adv: batadv0: Interface activated: batadv_slave_1
[ 47.070249][ T1114] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0
[ 47.079284][ T1114] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0
[ 47.088526][ T1114] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0
[ 47.097604][ T1114] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0
[ 47.118491][ T1114] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 47.128034][ T1114] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[ 47.138641][ T31] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[ 47.146575][ T31] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[ 47.397443][ T4665] netdevsim netdevsim2 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 48.656190][ T4665] netdevsim netdevsim2 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 50.135817][ T4665] netdevsim netdevsim2 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 50.196037][ T4665] netdevsim netdevsim2 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 50.267780][ T4665] bridge_slave_1: left allmulticast mode
[ 50.273424][ T4665] bridge_slave_1: left promiscuous mode
[ 50.279147][ T4665] bridge0: port 2(bridge_slave_1) entered disabled state
[ 50.286608][ T4665] bridge_slave_0: left allmulticast mode
[ 50.292223][ T4665] bridge_slave_0: left promiscuous mode
[ 50.297940][ T4665] bridge0: port 1(bridge_slave_0) entered disabled state
[ 50.346523][ T4665] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[ 50.355730][ T4665] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[ 50.364635][ T4665] bond0 (unregistering): Released all slaves
[ 50.489243][ T4665] hsr_slave_0: left promiscuous mode
[ 50.495116][ T4665] hsr_slave_1: left promiscuous mode
[ 50.500603][ T4665] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[ 50.508254][ T4665] batman_adv: batadv0: Removing interface: batadv_slave_0
[ 50.516362][ T4665] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[ 50.523830][ T4665] batman_adv: batadv0: Removing interface: batadv_slave_1
[ 50.532141][ T4665] veth1_macvtap: left promiscuous mode
[ 50.537663][ T4665] veth0_macvtap: left promiscuous mode
[ 50.543134][ T4665] veth1_vlan: left promiscuous mode
[ 50.548371][ T4665] veth0_vlan: left promiscuous mode
[ 50.572434][ T4665] team0 (unregistering): Port device team_slave_1 removed
[ 50.580735][ T4665] team0 (unregistering): Port device team_slave_0 removed
[ 50.796895][ T4665] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 50.995743][ T4665] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 51.046021][ T4665] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 51.086321][ T4665] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[ 51.168169][ T4665] bridge_slave_1: left allmulticast mode
[ 51.173821][ T4665] bridge_slave_1: left promiscuous mode
[ 51.179500][ T4665] bridge0: port 2(bridge_slave_1) entered disabled state
[ 51.187423][ T4665] bridge_slave_0: left allmulticast mode
[ 51.193142][ T4665] bridge_slave_0: left promiscuous mode
[ 51.198820][ T4665] bridge0: port 1(bridge_slave_0) entered disabled state
[ 51.227199][ T4665] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[ 51.236439][ T4665] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[ 51.245559][ T4665] bond0 (unregistering): Released all slaves
[ 51.397225][ T4665] hsr_slave_0: left promiscuous mode
[ 51.402817][ T4665] hsr_slave_1: left promiscuous mode
[ 51.408550][ T4665] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[ 51.416235][ T4665] batman_adv: batadv0: Removing interface: batadv_slave_0
[ 51.423612][ T4665] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[ 51.431463][ T4665] batman_adv: batadv0: Removing interface: batadv_slave_1
[ 51.440527][ T4665] veth1_macvtap: left promiscuous mode
[ 51.446063][ T4665] veth0_macvtap: left promiscuous mode
[ 51.451569][ T4665] veth1_vlan: left promiscuous mode
[ 51.456836][ T4665] veth0_vlan: left promiscuous mode
[ 51.490937][ T4665] team0 (unregistering): Port device team_slave_1 removed
[ 51.500524][ T4665] team0 (unregistering): Port device team_slave_0 removed
syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build3894858430=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.24.4'
GOWORK=''
PKG_CONFIG='pkg-config'
git status (err=<nil>)
HEAD detached at b78a734197
nothing to commit, working tree clean
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=b78a7341979245ec72840af68695cb23b98dc2cb -X github.com/google/syzkaller/prog.gitRevisionDate=20260128-224926" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=b78a7341979245ec72840af68695cb23b98dc2cb -X github.com/google/syzkaller/prog.gitRevisionDate=20260128-224926" ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=b78a7341979245ec72840af68695cb23b98dc2cb -X github.com/google/syzkaller/prog.gitRevisionDate=20260128-224926" -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"b78a7341979245ec72840af68695cb23b98dc2cb\"
/usr/bin/ld: /tmp/ccQZz4bN.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x386): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
./tools/check-syzos.sh 2>/dev/null
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=14a787fa580000
Tested on:
commit: da6f5bbc gfs2: fix memory leaks in gfs2_fill_super err..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git for-next
kernel config: https://syzkaller.appspot.com/x/.config?x=9d7d0fbecb37bff8
dashboard link: https://syzkaller.appspot.com/bug?extid=aac438d7a1c44071e04b
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
Note: no patches were applied.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [syzbot] [gfs2?] memory leak in __kthread_create_on_node
[not found] <CAHc6FU6E=3FyN7WvSSydWfE2F_JXXWkfw6A9TD5PXatpp73SVQ@mail.gmail.com>
@ 2026-02-04 19:15 ` syzbot
0 siblings, 0 replies; 7+ messages in thread
From: syzbot @ 2026-02-04 19:15 UTC (permalink / raw)
To: agruenba, linux-kernel, syzkaller-bugs
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
memory leak in gfs2_trans_begin
BUG: memory leak
unreferenced object 0xffff88812f712360 (size 144):
comm "syz.3.130", pid 7417, jiffies 4294957464
hex dump (first 32 bytes):
fa 02 7a 82 ff ff ff ff 05 00 00 00 00 00 00 00 ..z.............
0b 00 00 00 00 00 00 00 06 00 00 00 00 00 00 00 ................
backtrace (crc 643c8b36):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4958 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_noprof+0x412/0x580 mm/slub.c:5270
gfs2_trans_begin+0x29/0xa0 fs/gfs2/trans.c:120
alloc_dinode fs/gfs2/inode.c:432 [inline]
gfs2_create_inode+0xbfa/0x17f0 fs/gfs2/inode.c:822
gfs2_atomic_open+0x96/0x190 fs/gfs2/inode.c:1402
atomic_open fs/namei.c:4304 [inline]
lookup_open fs/namei.c:4415 [inline]
open_last_lookups fs/namei.c:4549 [inline]
path_openat+0x158f/0x20f0 fs/namei.c:4793
do_filp_open+0x104/0x1f0 fs/namei.c:4823
do_sys_openat2+0xcb/0x180 fs/open.c:1430
do_sys_open fs/open.c:1436 [inline]
__do_sys_open fs/open.c:1444 [inline]
__se_sys_open fs/open.c:1440 [inline]
__x64_sys_open+0x7e/0xf0 fs/open.c:1440
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF
Tested on:
commit: da6f5bbc gfs2: fix memory leaks in gfs2_fill_super err..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git for-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1774a402580000
kernel config: https://syzkaller.appspot.com/x/.config?x=9d7d0fbecb37bff8
dashboard link: https://syzkaller.appspot.com/bug?extid=aac438d7a1c44071e04b
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
Note: no patches were applied.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2026-02-04 19:15 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
[not found] <CAHc6FU5FACWy-y-t=qEyMsJHSv5D7A9XgYMdxbDh1S0tgz=kQg@mail.gmail.com>
2026-02-04 12:07 ` [syzbot] [gfs2?] memory leak in __kthread_create_on_node syzbot
[not found] <CAHc6FU6E=3FyN7WvSSydWfE2F_JXXWkfw6A9TD5PXatpp73SVQ@mail.gmail.com>
2026-02-04 19:15 ` syzbot
[not found] <20260131023756.72030-1-kartikey406@gmail.com>
2026-01-31 5:22 ` syzbot
[not found] <20260130143741.67498-1-kartikey406@gmail.com>
2026-01-30 15:20 ` syzbot
2026-01-30 14:23 syzbot
2026-02-03 10:01 ` Andreas Gruenbacher
2026-02-03 13:35 ` syzbot
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