* [syzbot] [wireless?] KASAN: slab-out-of-bounds Read in ieee80211_add_virtual_monitor
@ 2025-11-16 7:50 syzbot
2025-11-28 15:04 ` syzbot
0 siblings, 1 reply; 2+ messages in thread
From: syzbot @ 2025-11-16 7:50 UTC (permalink / raw)
To: johannes, linux-kernel, linux-wireless, netdev, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: 04ca7a69a35b net: bnx2x: convert to use get_rx_ring_count
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1330a914580000
kernel config: https://syzkaller.appspot.com/x/.config?x=4dda49799a90cd0f
dashboard link: https://syzkaller.appspot.com/bug?extid=bc1aabf52d0a31e91f96
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/fe2c1ac0be7e/disk-04ca7a69.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b6c6a173a173/vmlinux-04ca7a69.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8a163d4feba0/bzImage-04ca7a69.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bc1aabf52d0a31e91f96@syzkaller.appspotmail.com
tipc: Resetting bearer <eth:syzkaller0>
==================================================================
BUG: KASAN: slab-out-of-bounds in ieee80211_add_virtual_monitor+0xa52/0xd00 net/mac80211/iface.c:1255
Read of size 1 at addr ffff888047b63d50 by task syz.3.4250/20835
CPU: 0 UID: 0 PID: 20835 Comm: syz.3.4250 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xca/0x240 mm/kasan/report.c:482
kasan_report+0x118/0x150 mm/kasan/report.c:595
ieee80211_add_virtual_monitor+0xa52/0xd00 net/mac80211/iface.c:1255
ieee80211_do_stop+0x1786/0x1f60 net/mac80211/iface.c:746
ieee80211_stop+0x1b1/0x240 net/mac80211/iface.c:828
__dev_close_many+0x364/0x6f0 net/core/dev.c:1756
netif_close_many+0x225/0x410 net/core/dev.c:1781
netif_close+0x158/0x210 net/core/dev.c:1798
dev_close+0x10a/0x220 net/core/dev_api.c:220
cfg80211_shutdown_all_interfaces+0xd4/0x220 net/wireless/core.c:280
cfg80211_rfkill_set_block+0x2d/0x50 net/wireless/core.c:310
rfkill_set_block+0x1d2/0x440 net/rfkill/core.c:346
rfkill_fop_write+0x44b/0x570 net/rfkill/core.c:1301
vfs_write+0x27e/0xb30 fs/read_write.c:684
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbbceb8f6c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbbcfa30038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbbcede5fa0 RCX: 00007fbbceb8f6c9
RDX: 0000000000000008 RSI: 0000200000000080 RDI: 0000000000000008
RBP: 00007fbbcec11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbbcede6038 R14: 00007fbbcede5fa0 R15: 00007ffd05a68698
</TASK>
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888047b63a80 pfn:0x47b60
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f8(unknown)
raw: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000
raw: ffff888047b63a80 0000000000000000 00000000f8000000 0000000000000000
head: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000
head: ffff888047b63a80 0000000000000000 00000000f8000000 0000000000000000
head: 00fff00000000002 ffffea00011ed801 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x446dc0(GFP_KERNEL_ACCOUNT|__GFP_ZERO|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_COMP), pid 12532, tgid 12532 (syz-executor), ts 337218700996, free_ts 297447370395
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
___kmalloc_large_node+0x5f/0x1b0 mm/slub.c:5591
__kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:5622
__do_kmalloc_node mm/slub.c:5638 [inline]
__kvmalloc_node_noprof+0x6e/0x910 mm/slub.c:7108
alloc_netdev_mqs+0xa6/0x11b0 net/core/dev.c:11989
ieee80211_if_add+0x46c/0x1390 net/mac80211/iface.c:2227
ieee80211_register_hw+0x35a5/0x40d0 net/mac80211/main.c:1607
mac80211_hwsim_new_radio+0x2f9a/0x5260 drivers/net/wireless/virtual/mac80211_hwsim.c:5810
hwsim_new_radio_nl+0xf5b/0x1bd0 drivers/net/wireless/virtual/mac80211_hwsim.c:6504
genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
page last free pid 5833 tgid 5833 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2906
discard_slab mm/slub.c:3330 [inline]
__put_partials+0x146/0x170 mm/slub.c:3876
put_cpu_partial+0x1f2/0x2e0 mm/slub.c:3951
__slab_free+0x2b9/0x390 mm/slub.c:5929
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4978 [inline]
slab_alloc_node mm/slub.c:5288 [inline]
__do_kmalloc_node mm/slub.c:5649 [inline]
__kvmalloc_node_noprof+0x577/0x910 mm/slub.c:7108
xt_jumpstack_alloc net/netfilter/x_tables.c:1356 [inline]
xt_replace_table+0x18a/0x790 net/netfilter/x_tables.c:1395
__do_replace+0x163/0xaa0 net/ipv4/netfilter/arp_tables.c:912
do_replace net/ipv4/netfilter/arp_tables.c:989 [inline]
do_arpt_set_ctl+0xa2a/0xf10 net/ipv4/netfilter/arp_tables.c:1429
nf_setsockopt+0x26f/0x290 net/netfilter/nf_sockopt.c:101
do_sock_setsockopt+0x17c/0x1b0 net/socket.c:2360
__sys_setsockopt net/socket.c:2385 [inline]
__do_sys_setsockopt net/socket.c:2391 [inline]
__se_sys_setsockopt net/socket.c:2388 [inline]
__x64_sys_setsockopt+0x13f/0x1b0 net/socket.c:2388
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888047b63c00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
ffff888047b63c80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
>ffff888047b63d00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
^
ffff888047b63d80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
ffff888047b63e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
==================================================================
---
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 to overwrite report's subsystems, reply with:
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(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] 2+ messages in thread
* Re: [syzbot] [wireless?] KASAN: slab-out-of-bounds Read in ieee80211_add_virtual_monitor
2025-11-16 7:50 [syzbot] [wireless?] KASAN: slab-out-of-bounds Read in ieee80211_add_virtual_monitor syzbot
@ 2025-11-28 15:04 ` syzbot
0 siblings, 0 replies; 2+ messages in thread
From: syzbot @ 2025-11-28 15:04 UTC (permalink / raw)
To: johannes, linux-kernel, linux-wireless, netdev, syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: 7d31f578f323 Add linux-next specific files for 20251128
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1448fe12580000
kernel config: https://syzkaller.appspot.com/x/.config?x=ec890b8333fce099
dashboard link: https://syzkaller.appspot.com/bug?extid=bc1aabf52d0a31e91f96
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=102b9f42580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=142e3e92580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9bcc6eb60940/disk-7d31f578.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/895bc1bfae48/vmlinux-7d31f578.xz
kernel image: https://storage.googleapis.com/syzbot-assets/48f15e4679f3/bzImage-7d31f578.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bc1aabf52d0a31e91f96@syzkaller.appspotmail.com
mac80211_hwsim hwsim5 syzkaller0: entered promiscuous mode
mac80211_hwsim hwsim5 syzkaller0: entered allmulticast mode
==================================================================
BUG: KASAN: slab-out-of-bounds in ieee80211_add_virtual_monitor+0xa42/0xce0 net/mac80211/iface.c:1255
Read of size 1 at addr ffff8880753b7d90 by task syz.0.17/6029
CPU: 0 UID: 0 PID: 6029 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xca/0x240 mm/kasan/report.c:482
kasan_report+0x118/0x150 mm/kasan/report.c:595
ieee80211_add_virtual_monitor+0xa42/0xce0 net/mac80211/iface.c:1255
ieee80211_do_stop+0x1786/0x1f70 net/mac80211/iface.c:746
ieee80211_stop+0x1b1/0x240 net/mac80211/iface.c:828
__dev_close_many+0x344/0x6b0 net/core/dev.c:1756
__dev_close net/core/dev.c:1768 [inline]
__dev_change_flags+0x2be/0x680 net/core/dev.c:9733
netif_change_flags+0x88/0x1a0 net/core/dev.c:9798
dev_change_flags+0x130/0x260 net/core/dev_api.c:68
dev_ioctl+0x7b4/0x1150 net/core/dev_ioctl.c:842
sock_do_ioctl+0x22c/0x300 net/socket.c:1274
sock_ioctl+0x576/0x790 net/socket.c:1381
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5875f8f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc52c16018 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f58761e5fa0 RCX: 00007f5875f8f749
RDX: 0000200000000000 RSI: 0000000000008914 RDI: 0000000000000006
RBP: 00007f5876013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f58761e5fa0 R14: 00007f58761e5fa0 R15: 0000000000000003
</TASK>
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880753b5d40 pfn:0x753b4
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888026064282
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f8(unknown)
raw: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000
raw: ffff8880753b5d40 0000000000000000 00000000f8000000 ffff888026064282
head: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000
head: ffff8880753b5d40 0000000000000000 00000000f8000000 ffff888026064282
head: 00fff00000000002 ffffea0001d4ed01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x446dc0(GFP_KERNEL_ACCOUNT|__GFP_ZERO|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_COMP), pid 6029, tgid 6029 (syz.0.17), ts 111996806551, free_ts 111081173010
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1846
prep_new_page mm/page_alloc.c:1854 [inline]
get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486
___kmalloc_large_node+0x4e/0x150 mm/slub.c:5593
__kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:5624
__do_kmalloc_node mm/slub.c:5640 [inline]
__kvmalloc_node_noprof+0x6e/0x920 mm/slub.c:7129
alloc_netdev_mqs+0xa8/0x1200 net/core/dev.c:12011
ieee80211_if_add+0x45c/0x1370 net/mac80211/iface.c:2227
ieee80211_add_iface+0xb5/0x5a0 net/mac80211/cfg.c:217
rdev_add_virtual_intf net/wireless/rdev-ops.h:50 [inline]
_nl80211_new_interface net/wireless/nl80211.c:4706 [inline]
nl80211_new_interface+0x883/0x1130 net/wireless/nl80211.c:4764
genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1344
page last free pid 6006 tgid 6006 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1395 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
__slab_free+0x21b/0x2a0 mm/slub.c:5999
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:349
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4948 [inline]
slab_alloc_node mm/slub.c:5258 [inline]
kmem_cache_alloc_noprof+0x37d/0x710 mm/slub.c:5265
vm_area_dup+0x2b/0x680 mm/vma_init.c:123
__split_vma+0x1a9/0xa00 mm/vma.c:508
split_vma mm/vma.c:591 [inline]
vma_modify+0x952/0x1a70 mm/vma.c:1634
vma_modify_flags+0x208/0x2e0 mm/vma.c:1654
mprotect_fixup+0x43c/0xa30 mm/mprotect.c:756
do_mprotect_pkey+0x8c5/0xcd0 mm/mprotect.c:930
__do_sys_mprotect mm/mprotect.c:951 [inline]
__se_sys_mprotect mm/mprotect.c:948 [inline]
__x64_sys_mprotect+0x80/0x90 mm/mprotect.c:948
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff8880753b7c80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
ffff8880753b7d00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
>ffff8880753b7d80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
^
ffff8880753b7e00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
ffff8880753b7e80: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
==================================================================
---
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.
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2025-11-28 15:04 UTC | newest]
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2025-11-16 7:50 [syzbot] [wireless?] KASAN: slab-out-of-bounds Read in ieee80211_add_virtual_monitor syzbot
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