* [syzbot] [rdma?] KASAN: slab-use-after-free Read in ib_device_uevent (2)
@ 2025-02-16 21:55 syzbot
2025-03-19 23:49 ` Jason Gunthorpe
2025-03-20 8:41 ` Zhu Yanjun
0 siblings, 2 replies; 4+ messages in thread
From: syzbot @ 2025-02-16 21:55 UTC (permalink / raw)
To: jgg, leon, linux-kernel, linux-rdma, netdev, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: 09fbf3d50205 Merge tag 'tomoyo-pr-20250211' of git://git.c..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=140563f8580000
kernel config: https://syzkaller.appspot.com/x/.config?x=641fe3e3cfee64bb
dashboard link: https://syzkaller.appspot.com/bug?extid=17fb1664c4f5a2eeb36f
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-09fbf3d5.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/31b409a4b675/vmlinux-09fbf3d5.xz
kernel image: https://storage.googleapis.com/syzbot-assets/27f349d4d8cb/bzImage-09fbf3d5.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+17fb1664c4f5a2eeb36f@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in string_nocheck lib/vsprintf.c:632 [inline]
BUG: KASAN: slab-use-after-free in string+0x4a6/0x4f0 lib/vsprintf.c:714
Read of size 1 at addr ffff88803e895ea0 by task udevd/6903
CPU: 1 UID: 0 PID: 6903 Comm: udevd Not tainted 6.14.0-rc2-syzkaller-00039-g09fbf3d50205 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:489
kasan_report+0xd9/0x110 mm/kasan/report.c:602
string_nocheck lib/vsprintf.c:632 [inline]
string+0x4a6/0x4f0 lib/vsprintf.c:714
vsnprintf+0x4c8/0x1180 lib/vsprintf.c:2843
add_uevent_var+0x17c/0x3a0 lib/kobject_uevent.c:679
ib_device_uevent+0x4e/0xb0 drivers/infiniband/core/device.c:502
dev_uevent+0x28b/0x770 drivers/base/core.c:2673
uevent_show+0x1d8/0x3b0 drivers/base/core.c:2731
dev_attr_show+0x53/0xe0 drivers/base/core.c:2423
sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59
seq_read_iter+0x4f4/0x12b0 fs/seq_file.c:230
kernfs_fop_read_iter+0x414/0x580 fs/kernfs/file.c:279
new_sync_read fs/read_write.c:484 [inline]
vfs_read+0x886/0xbf0 fs/read_write.c:565
ksys_read+0x12b/0x250 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7681378b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffcbdf9d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055efbec7de20 RCX: 00007f7681378b6a
RDX: 0000000000001000 RSI: 000055efbeca9490 RDI: 0000000000000008
RBP: 000055efbec7de20 R08: 0000000000000008 R09: 0000000000020000
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffcbdf9d518 R15: 000000000000000a
</TASK>
Allocated by task 12483:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_node_track_caller_noprof+0x222/0x510 mm/slub.c:4313
__kmemdup_nul mm/util.c:61 [inline]
kstrdup+0x53/0x100 mm/util.c:81
kstrdup_const+0x63/0x80 mm/util.c:101
kvasprintf_const+0x164/0x1a0 lib/kasprintf.c:46
kobject_set_name_vargs+0x5a/0x140 lib/kobject.c:274
dev_set_name+0xc8/0x100 drivers/base/core.c:3468
assign_name drivers/infiniband/core/device.c:1202 [inline]
ib_register_device+0x7e0/0xdf0 drivers/infiniband/core/device.c:1384
siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline]
siw_newlink drivers/infiniband/sw/siw/siw_main.c:431 [inline]
siw_newlink+0xb60/0xd70 drivers/infiniband/sw/siw/siw_main.c:413
nldev_newlink+0x38e/0x660 drivers/infiniband/core/nldev.c:1795
rdma_nl_rcv_msg+0x388/0x6e0 drivers/infiniband/core/netlink.c:195
rdma_nl_rcv_skb.constprop.0.isra.0+0x2e6/0x450 drivers/infiniband/core/netlink.c:239
netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1348
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:733 [inline]
____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573
___sys_sendmsg+0x135/0x1e0 net/socket.c:2627
__sys_sendmsg+0x16e/0x220 net/socket.c:2659
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 12485:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kfree+0x2c4/0x4d0 mm/slub.c:4757
kfree_const+0x55/0x60 mm/util.c:43
kobject_rename+0x179/0x260 lib/kobject.c:524
device_rename+0x130/0x230 drivers/base/core.c:4525
ib_device_rename+0x114/0x5c0 drivers/infiniband/core/device.c:402
nldev_set_doit+0x3be/0x4c0 drivers/infiniband/core/nldev.c:1146
rdma_nl_rcv_msg+0x388/0x6e0 drivers/infiniband/core/netlink.c:195
rdma_nl_rcv_skb.constprop.0.isra.0+0x2e6/0x450 drivers/infiniband/core/netlink.c:239
netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1348
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:733 [inline]
____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573
___sys_sendmsg+0x135/0x1e0 net/socket.c:2627
__sys_sendmsg+0x16e/0x220 net/socket.c:2659
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88803e895ea0
which belongs to the cache kmalloc-8 of size 8
The buggy address is located 0 bytes inside of
freed 8-byte region [ffff88803e895ea0, ffff88803e895ea8)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3e895
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b042500 ffffea0000a05a00 dead000000000002
raw: 0000000000000000 0000000000800080 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 11986, tgid 11985 (syz.1.1513), ts 150711065425, free_ts 150704805794
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4739
alloc_pages_mpol+0x1fc/0x540 mm/mempolicy.c:2270
alloc_slab_page mm/slub.c:2423 [inline]
allocate_slab mm/slub.c:2587 [inline]
new_slab+0x23d/0x330 mm/slub.c:2640
___slab_alloc+0xc5d/0x1720 mm/slub.c:3826
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916
__slab_alloc_node mm/slub.c:3991 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__do_kmalloc_node mm/slub.c:4293 [inline]
__kmalloc_node_noprof+0x2f0/0x510 mm/slub.c:4300
__kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:662
kvmalloc_array_node_noprof include/linux/slab.h:1063 [inline]
__ptr_ring_init_queue_alloc_noprof include/linux/ptr_ring.h:471 [inline]
ptr_ring_resize_multiple_bh_noprof include/linux/ptr_ring.h:634 [inline]
skb_array_resize_multiple_bh_noprof include/linux/skb_array.h:208 [inline]
pfifo_fast_change_tx_queue_len+0x157/0xbb0 net/sched/sch_generic.c:909
qdisc_change_tx_queue_len net/sched/sch_generic.c:1410 [inline]
dev_qdisc_change_tx_queue_len+0x166/0x380 net/sched/sch_generic.c:1457
dev_change_tx_queue_len+0x1a3/0x1e0 net/core/dev.c:9362
dev_ifsioc+0xdfe/0x10d0 net/core/dev_ioctl.c:608
dev_ioctl+0x224/0x10c0 net/core/dev_ioctl.c:826
sock_do_ioctl+0x19e/0x280 net/socket.c:1213
sock_ioctl+0x228/0x6c0 net/socket.c:1318
page last free pid 11986 tgid 11985 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
__put_partials+0x14c/0x170 mm/slub.c:3153
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4115 [inline]
slab_alloc_node mm/slub.c:4164 [inline]
__kmalloc_cache_noprof+0x243/0x410 mm/slub.c:4320
kmalloc_noprof include/linux/slab.h:901 [inline]
kmalloc_array_noprof include/linux/slab.h:945 [inline]
ptr_ring_resize_multiple_bh_noprof include/linux/ptr_ring.h:629 [inline]
skb_array_resize_multiple_bh_noprof include/linux/skb_array.h:208 [inline]
pfifo_fast_change_tx_queue_len+0xe1/0xbb0 net/sched/sch_generic.c:909
qdisc_change_tx_queue_len net/sched/sch_generic.c:1410 [inline]
dev_qdisc_change_tx_queue_len+0x166/0x380 net/sched/sch_generic.c:1457
dev_change_tx_queue_len+0x1a3/0x1e0 net/core/dev.c:9362
dev_ifsioc+0xdfe/0x10d0 net/core/dev_ioctl.c:608
dev_ioctl+0x224/0x10c0 net/core/dev_ioctl.c:826
sock_do_ioctl+0x19e/0x280 net/socket.c:1213
sock_ioctl+0x228/0x6c0 net/socket.c:1318
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl fs/ioctl.c:892 [inline]
__x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88803e895d80: 05 fc fc fc fa fc fc fc 05 fc fc fc fa fc fc fc
ffff88803e895e00: 05 fc fc fc 00 fc fc fc 05 fc fc fc fa fc fc fc
>ffff88803e895e80: 05 fc fc fc fa fc fc fc 05 fc fc fc 00 fc fc fc
^
ffff88803e895f00: 05 fc fc fc 05 fc fc fc 05 fc fc fc fa fc fc fc
ffff88803e895f80: 05 fc fc fc 00 fc fc fc 05 fc fc fc fa fc fc fc
==================================================================
---
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] [rdma?] KASAN: slab-use-after-free Read in ib_device_uevent (2)
2025-02-16 21:55 [syzbot] [rdma?] KASAN: slab-use-after-free Read in ib_device_uevent (2) syzbot
@ 2025-03-19 23:49 ` Jason Gunthorpe
2025-03-20 8:41 ` Zhu Yanjun
1 sibling, 0 replies; 4+ messages in thread
From: Jason Gunthorpe @ 2025-03-19 23:49 UTC (permalink / raw)
To: syzbot; +Cc: leon, linux-kernel, linux-rdma, netdev, syzkaller-bugs
On Sun, Feb 16, 2025 at 01:55:20PM -0800, syzbot wrote:
> CPU: 1 UID: 0 PID: 6903 Comm: udevd Not tainted 6.14.0-rc2-syzkaller-00039-g09fbf3d50205 #0
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
> Call Trace:
> add_uevent_var+0x17c/0x3a0 lib/kobject_uevent.c:679
> ib_device_uevent+0x4e/0xb0 drivers/infiniband/core/device.c:502
> dev_uevent+0x28b/0x770 drivers/base/core.c:2673
>
> Allocated by task 12483:
> kvasprintf_const+0x164/0x1a0 lib/kasprintf.c:46
> kobject_set_name_vargs+0x5a/0x140 lib/kobject.c:274
> dev_set_name+0xc8/0x100 drivers/base/core.c:3468
> assign_name drivers/infiniband/core/device.c:1202 [inline]
> ib_register_device+0x7e0/0xdf0 drivers/infiniband/core/device.c:1384
> siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline]
> Freed by task 12485:
> kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
> kasan_save_track+0x14/0x30 mm/kasan/common.c:68
> kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
> poison_slab_object mm/kasan/common.c:247 [inline]
> __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
> kasan_slab_free include/linux/kasan.h:233 [inline]
> slab_free_hook mm/slub.c:2353 [inline]
> slab_free mm/slub.c:4609 [inline]
> kfree+0x2c4/0x4d0 mm/slub.c:4757
> kfree_const+0x55/0x60 mm/util.c:43
> kobject_rename+0x179/0x260 lib/kobject.c:524
> device_rename+0x130/0x230 drivers/base/core.c:4525
> ib_device_rename+0x114/0x5c0 drivers/infiniband/core/device.c:402
This looks like it is racing siw_device_register() with
ib_device_rename() ??
Whichi suggests we don't have the right protection in
ib_device_rename() to not act on devices that are yet to be fully
registered.
Jason
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [syzbot] [rdma?] KASAN: slab-use-after-free Read in ib_device_uevent (2)
2025-02-16 21:55 [syzbot] [rdma?] KASAN: slab-use-after-free Read in ib_device_uevent (2) syzbot
2025-03-19 23:49 ` Jason Gunthorpe
@ 2025-03-20 8:41 ` Zhu Yanjun
2025-03-20 15:45 ` Bernard Metzler
1 sibling, 1 reply; 4+ messages in thread
From: Zhu Yanjun @ 2025-03-20 8:41 UTC (permalink / raw)
To: syzbot, jgg, leon, linux-kernel, linux-rdma, netdev,
syzkaller-bugs
On 16.02.25 22:55, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 09fbf3d50205 Merge tag 'tomoyo-pr-20250211' of git://git.c..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=140563f8580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=641fe3e3cfee64bb
> dashboard link: https://syzkaller.appspot.com/bug?extid=17fb1664c4f5a2eeb36f
> compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
>
> Unfortunately, I don't have any reproducer for this issue yet.
>
> Downloadable assets:
> disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-09fbf3d5.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/31b409a4b675/vmlinux-09fbf3d5.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/27f349d4d8cb/bzImage-09fbf3d5.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+17fb1664c4f5a2eeb36f@syzkaller.appspotmail.com
To this problem, I just looked through this problem which occurred on
iwarp. I remember a similar problem which occurred on rxe.
To the problem on rxe, the solution
https://patchwork.kernel.org/project/linux-rdma/patch/20250313092421.944658-1-wangliang74@huawei.com/
seems to be able to fix it.
I am not sure if this problem can also be fixed by the above solution or
not.
Best Regards,
Zhu Yanjun
>
> ==================================================================
> BUG: KASAN: slab-use-after-free in string_nocheck lib/vsprintf.c:632 [inline]
> BUG: KASAN: slab-use-after-free in string+0x4a6/0x4f0 lib/vsprintf.c:714
> Read of size 1 at addr ffff88803e895ea0 by task udevd/6903
>
> CPU: 1 UID: 0 PID: 6903 Comm: udevd Not tainted 6.14.0-rc2-syzkaller-00039-g09fbf3d50205 #0
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
> Call Trace:
> <TASK>
> __dump_stack lib/dump_stack.c:94 [inline]
> dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
> print_address_description mm/kasan/report.c:378 [inline]
> print_report+0xc3/0x620 mm/kasan/report.c:489
> kasan_report+0xd9/0x110 mm/kasan/report.c:602
> string_nocheck lib/vsprintf.c:632 [inline]
> string+0x4a6/0x4f0 lib/vsprintf.c:714
> vsnprintf+0x4c8/0x1180 lib/vsprintf.c:2843
> add_uevent_var+0x17c/0x3a0 lib/kobject_uevent.c:679
> ib_device_uevent+0x4e/0xb0 drivers/infiniband/core/device.c:502
> dev_uevent+0x28b/0x770 drivers/base/core.c:2673
> uevent_show+0x1d8/0x3b0 drivers/base/core.c:2731
> dev_attr_show+0x53/0xe0 drivers/base/core.c:2423
> sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59
> seq_read_iter+0x4f4/0x12b0 fs/seq_file.c:230
> kernfs_fop_read_iter+0x414/0x580 fs/kernfs/file.c:279
> new_sync_read fs/read_write.c:484 [inline]
> vfs_read+0x886/0xbf0 fs/read_write.c:565
> ksys_read+0x12b/0x250 fs/read_write.c:708
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> RIP: 0033:0x7f7681378b6a
> Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
> RSP: 002b:00007ffcbdf9d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
> RAX: ffffffffffffffda RBX: 000055efbec7de20 RCX: 00007f7681378b6a
> RDX: 0000000000001000 RSI: 000055efbeca9490 RDI: 0000000000000008
> RBP: 000055efbec7de20 R08: 0000000000000008 R09: 0000000000020000
> R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
> R13: 0000000000003fff R14: 00007ffcbdf9d518 R15: 000000000000000a
> </TASK>
>
> Allocated by task 12483:
> kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
> kasan_save_track+0x14/0x30 mm/kasan/common.c:68
> poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
> __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
> kasan_kmalloc include/linux/kasan.h:260 [inline]
> __do_kmalloc_node mm/slub.c:4294 [inline]
> __kmalloc_node_track_caller_noprof+0x222/0x510 mm/slub.c:4313
> __kmemdup_nul mm/util.c:61 [inline]
> kstrdup+0x53/0x100 mm/util.c:81
> kstrdup_const+0x63/0x80 mm/util.c:101
> kvasprintf_const+0x164/0x1a0 lib/kasprintf.c:46
> kobject_set_name_vargs+0x5a/0x140 lib/kobject.c:274
> dev_set_name+0xc8/0x100 drivers/base/core.c:3468
> assign_name drivers/infiniband/core/device.c:1202 [inline]
> ib_register_device+0x7e0/0xdf0 drivers/infiniband/core/device.c:1384
> siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline]
> siw_newlink drivers/infiniband/sw/siw/siw_main.c:431 [inline]
> siw_newlink+0xb60/0xd70 drivers/infiniband/sw/siw/siw_main.c:413
> nldev_newlink+0x38e/0x660 drivers/infiniband/core/nldev.c:1795
> rdma_nl_rcv_msg+0x388/0x6e0 drivers/infiniband/core/netlink.c:195
> rdma_nl_rcv_skb.constprop.0.isra.0+0x2e6/0x450 drivers/infiniband/core/netlink.c:239
> netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
> netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1348
> netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1892
> sock_sendmsg_nosec net/socket.c:718 [inline]
> __sock_sendmsg net/socket.c:733 [inline]
> ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573
> ___sys_sendmsg+0x135/0x1e0 net/socket.c:2627
> __sys_sendmsg+0x16e/0x220 net/socket.c:2659
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Freed by task 12485:
> kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
> kasan_save_track+0x14/0x30 mm/kasan/common.c:68
> kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
> poison_slab_object mm/kasan/common.c:247 [inline]
> __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
> kasan_slab_free include/linux/kasan.h:233 [inline]
> slab_free_hook mm/slub.c:2353 [inline]
> slab_free mm/slub.c:4609 [inline]
> kfree+0x2c4/0x4d0 mm/slub.c:4757
> kfree_const+0x55/0x60 mm/util.c:43
> kobject_rename+0x179/0x260 lib/kobject.c:524
> device_rename+0x130/0x230 drivers/base/core.c:4525
> ib_device_rename+0x114/0x5c0 drivers/infiniband/core/device.c:402
> nldev_set_doit+0x3be/0x4c0 drivers/infiniband/core/nldev.c:1146
> rdma_nl_rcv_msg+0x388/0x6e0 drivers/infiniband/core/netlink.c:195
> rdma_nl_rcv_skb.constprop.0.isra.0+0x2e6/0x450 drivers/infiniband/core/netlink.c:239
> netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
> netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1348
> netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1892
> sock_sendmsg_nosec net/socket.c:718 [inline]
> __sock_sendmsg net/socket.c:733 [inline]
> ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573
> ___sys_sendmsg+0x135/0x1e0 net/socket.c:2627
> __sys_sendmsg+0x16e/0x220 net/socket.c:2659
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> The buggy address belongs to the object at ffff88803e895ea0
> which belongs to the cache kmalloc-8 of size 8
> The buggy address is located 0 bytes inside of
> freed 8-byte region [ffff88803e895ea0, ffff88803e895ea8)
>
> The buggy address belongs to the physical page:
> page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3e895
> flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
> page_type: f5(slab)
> raw: 00fff00000000000 ffff88801b042500 ffffea0000a05a00 dead000000000002
> raw: 0000000000000000 0000000000800080 00000000f5000000 0000000000000000
> page dumped because: kasan: bad access detected
> page_owner tracks the page as allocated
> page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 11986, tgid 11985 (syz.1.1513), ts 150711065425, free_ts 150704805794
> set_page_owner include/linux/page_owner.h:32 [inline]
> post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551
> prep_new_page mm/page_alloc.c:1559 [inline]
> get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477
> __alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4739
> alloc_pages_mpol+0x1fc/0x540 mm/mempolicy.c:2270
> alloc_slab_page mm/slub.c:2423 [inline]
> allocate_slab mm/slub.c:2587 [inline]
> new_slab+0x23d/0x330 mm/slub.c:2640
> ___slab_alloc+0xc5d/0x1720 mm/slub.c:3826
> __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916
> __slab_alloc_node mm/slub.c:3991 [inline]
> slab_alloc_node mm/slub.c:4152 [inline]
> __do_kmalloc_node mm/slub.c:4293 [inline]
> __kmalloc_node_noprof+0x2f0/0x510 mm/slub.c:4300
> __kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:662
> kvmalloc_array_node_noprof include/linux/slab.h:1063 [inline]
> __ptr_ring_init_queue_alloc_noprof include/linux/ptr_ring.h:471 [inline]
> ptr_ring_resize_multiple_bh_noprof include/linux/ptr_ring.h:634 [inline]
> skb_array_resize_multiple_bh_noprof include/linux/skb_array.h:208 [inline]
> pfifo_fast_change_tx_queue_len+0x157/0xbb0 net/sched/sch_generic.c:909
> qdisc_change_tx_queue_len net/sched/sch_generic.c:1410 [inline]
> dev_qdisc_change_tx_queue_len+0x166/0x380 net/sched/sch_generic.c:1457
> dev_change_tx_queue_len+0x1a3/0x1e0 net/core/dev.c:9362
> dev_ifsioc+0xdfe/0x10d0 net/core/dev_ioctl.c:608
> dev_ioctl+0x224/0x10c0 net/core/dev_ioctl.c:826
> sock_do_ioctl+0x19e/0x280 net/socket.c:1213
> sock_ioctl+0x228/0x6c0 net/socket.c:1318
> page last free pid 11986 tgid 11985 stack trace:
> reset_page_owner include/linux/page_owner.h:25 [inline]
> free_pages_prepare mm/page_alloc.c:1127 [inline]
> free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
> __put_partials+0x14c/0x170 mm/slub.c:3153
> qlink_free mm/kasan/quarantine.c:163 [inline]
> qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
> kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
> __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
> kasan_slab_alloc include/linux/kasan.h:250 [inline]
> slab_post_alloc_hook mm/slub.c:4115 [inline]
> slab_alloc_node mm/slub.c:4164 [inline]
> __kmalloc_cache_noprof+0x243/0x410 mm/slub.c:4320
> kmalloc_noprof include/linux/slab.h:901 [inline]
> kmalloc_array_noprof include/linux/slab.h:945 [inline]
> ptr_ring_resize_multiple_bh_noprof include/linux/ptr_ring.h:629 [inline]
> skb_array_resize_multiple_bh_noprof include/linux/skb_array.h:208 [inline]
> pfifo_fast_change_tx_queue_len+0xe1/0xbb0 net/sched/sch_generic.c:909
> qdisc_change_tx_queue_len net/sched/sch_generic.c:1410 [inline]
> dev_qdisc_change_tx_queue_len+0x166/0x380 net/sched/sch_generic.c:1457
> dev_change_tx_queue_len+0x1a3/0x1e0 net/core/dev.c:9362
> dev_ifsioc+0xdfe/0x10d0 net/core/dev_ioctl.c:608
> dev_ioctl+0x224/0x10c0 net/core/dev_ioctl.c:826
> sock_do_ioctl+0x19e/0x280 net/socket.c:1213
> sock_ioctl+0x228/0x6c0 net/socket.c:1318
> vfs_ioctl fs/ioctl.c:51 [inline]
> __do_sys_ioctl fs/ioctl.c:906 [inline]
> __se_sys_ioctl fs/ioctl.c:892 [inline]
> __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
>
> Memory state around the buggy address:
> ffff88803e895d80: 05 fc fc fc fa fc fc fc 05 fc fc fc fa fc fc fc
> ffff88803e895e00: 05 fc fc fc 00 fc fc fc 05 fc fc fc fa fc fc fc
>> ffff88803e895e80: 05 fc fc fc fa fc fc fc 05 fc fc fc 00 fc fc fc
> ^
> ffff88803e895f00: 05 fc fc fc 05 fc fc fc 05 fc fc fc fa fc fc fc
> ffff88803e895f80: 05 fc fc fc 00 fc fc fc 05 fc fc fc fa fc fc fc
> ==================================================================
>
>
> ---
> 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:
> #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] 4+ messages in thread
* RE: [syzbot] [rdma?] KASAN: slab-use-after-free Read in ib_device_uevent (2)
2025-03-20 8:41 ` Zhu Yanjun
@ 2025-03-20 15:45 ` Bernard Metzler
0 siblings, 0 replies; 4+ messages in thread
From: Bernard Metzler @ 2025-03-20 15:45 UTC (permalink / raw)
To: Zhu Yanjun, syzbot, jgg@ziepe.ca, leon@kernel.org,
linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org,
netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com
> -----Original Message-----
> From: Zhu Yanjun <yanjun.zhu@linux.dev>
> Sent: Thursday, March 20, 2025 9:41 AM
> To: syzbot <syzbot+17fb1664c4f5a2eeb36f@syzkaller.appspotmail.com>;
> jgg@ziepe.ca; leon@kernel.org; linux-kernel@vger.kernel.org; linux-
> rdma@vger.kernel.org; netdev@vger.kernel.org; syzkaller-
> bugs@googlegroups.com
> Subject: [EXTERNAL] Re: [syzbot] [rdma?] KASAN: slab-use-after-free Read in
> ib_device_uevent (2)
>
> On 16.02.25 22:55, syzbot wrote:
> > Hello,
> >
> > syzbot found the following issue on:
> >
> > HEAD commit: 09fbf3d50205 Merge tag 'tomoyo-pr-20250211' of
> git://git.c..
> > git tree: upstream
> > console output: https%
> 3A__syzkaller.appspot.com_x_log.txt-3Fx-
> 3D140563f8580000&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4t
> YSbqxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPxEc
> BAbeCqJelsb3Q&s=4HoaGCofTzC69mNNZLu7urW39zt-qZ0jHEwjCNq3e9Y&e=
> > kernel config: https%
> 3A__syzkaller.appspot.com_x_.config-3Fx-
> 3D641fe3e3cfee64bb&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE
> 4tYSbqxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPx
> EcBAbeCqJelsb3Q&s=jAjZbjn-w2sZsfK2gPXlLFltAGHvZLQFzWfk1TvVDc8&e=
> > dashboard link: https%
> 3A__syzkaller.appspot.com_bug-3Fextid-
> 3D17fb1664c4f5a2eeb36f&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbh
> vovE4tYSbqxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ
> 4gPxEcBAbeCqJelsb3Q&s=5B7eaLwpVQ_61Ux3yGd2CKLvh-uQsJf4-9v4bbRC0uk&e=
> > compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for
> Debian) 2.40
> >
> > Unfortunately, I don't have any reproducer for this issue yet.
> >
> > Downloadable assets:
> > disk image (non-bootable):
> https%
> 3A__storage.googleapis.com_syzbot-2Dassets_7feb34a89c2a_non-5Fbootable-
> 5Fdisk-
> 2D09fbf3d5.raw.xz&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4
> tYSbqxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPxE
> cBAbeCqJelsb3Q&s=hw8G10Pj-FRcaJZfChWmSKE8GaozuUeI85UvisfTHEQ&e=
> > vmlinux: https%
> 3A__storage.googleapis.com_syzbot-2Dassets_31b409a4b675_vmlinux-
> 2D09fbf3d5.xz&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4tYSb
> qxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPxEcBAb
> eCqJelsb3Q&s=Ih8IyDMEvy9jwvc2noeIX5E0FgZRM8D2RmxTNE3nih4&e=
> > kernel image: https%
> 3A__storage.googleapis.com_syzbot-2Dassets_27f349d4d8cb_bzImage-
> 2D09fbf3d5.xz&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4tYSb
> qxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPxEcBAb
> eCqJelsb3Q&s=PMgqb590AII6znT2g--1TKjjkadAlznJi0aFX-v9Pnw&e=
> >
> > IMPORTANT: if you fix the issue, please add the following tag to the
> commit:
> > Reported-by: syzbot+17fb1664c4f5a2eeb36f@syzkaller.appspotmail.com
>
> To this problem, I just looked through this problem which occurred on
> iwarp. I remember a similar problem which occurred on rxe.
> To the problem on rxe, the solution
> https%
> 3A__patchwork.kernel.org_project_linux-2Drdma_patch_20250313092421.944658-
> 2D1-2Dwangliang74-
> 40huawei.com_&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4tYSb
> qxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPxEcBAb
> eCqJelsb3Q&s=YC4HmD2kVw28DToigJwJRY1U8oNFfvQgMF2S5wpatak&e=
> seems to be able to fix it.
>
> I am not sure if this problem can also be fixed by the above solution or
> not.
>
I would assume yes. The stack trace is very similar.
Thanks,
Bernard.
> Best Regards,
> Zhu Yanjun
>
> >
> > ==================================================================
> > BUG: KASAN: slab-use-after-free in string_nocheck lib/vsprintf.c:632
> [inline]
> > BUG: KASAN: slab-use-after-free in string+0x4a6/0x4f0 lib/vsprintf.c:714
> > Read of size 1 at addr ffff88803e895ea0 by task udevd/6903
> >
> > CPU: 1 UID: 0 PID: 6903 Comm: udevd Not tainted 6.14.0-rc2-syzkaller-
> 00039-g09fbf3d50205 #0
> > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-
> 1.16.3-2~bpo12+1 04/01/2014
> > Call Trace:
> > <TASK>
> > __dump_stack lib/dump_stack.c:94 [inline]
> > dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
> > print_address_description mm/kasan/report.c:378 [inline]
> > print_report+0xc3/0x620 mm/kasan/report.c:489
> > kasan_report+0xd9/0x110 mm/kasan/report.c:602
> > string_nocheck lib/vsprintf.c:632 [inline]
> > string+0x4a6/0x4f0 lib/vsprintf.c:714
> > vsnprintf+0x4c8/0x1180 lib/vsprintf.c:2843
> > add_uevent_var+0x17c/0x3a0 lib/kobject_uevent.c:679
> > ib_device_uevent+0x4e/0xb0 drivers/infiniband/core/device.c:502
> > dev_uevent+0x28b/0x770 drivers/base/core.c:2673
> > uevent_show+0x1d8/0x3b0 drivers/base/core.c:2731
> > dev_attr_show+0x53/0xe0 drivers/base/core.c:2423
> > sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59
> > seq_read_iter+0x4f4/0x12b0 fs/seq_file.c:230
> > kernfs_fop_read_iter+0x414/0x580 fs/kernfs/file.c:279
> > new_sync_read fs/read_write.c:484 [inline]
> > vfs_read+0x886/0xbf0 fs/read_write.c:565
> > ksys_read+0x12b/0x250 fs/read_write.c:708
> > do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> > do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> > entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > RIP: 0033:0x7f7681378b6a
> > Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31
> c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0
> ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
> > RSP: 002b:00007ffcbdf9d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
> > RAX: ffffffffffffffda RBX: 000055efbec7de20 RCX: 00007f7681378b6a
> > RDX: 0000000000001000 RSI: 000055efbeca9490 RDI: 0000000000000008
> > RBP: 000055efbec7de20 R08: 0000000000000008 R09: 0000000000020000
> > R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
> > R13: 0000000000003fff R14: 00007ffcbdf9d518 R15: 000000000000000a
> > </TASK>
> >
> > Allocated by task 12483:
> > kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
> > kasan_save_track+0x14/0x30 mm/kasan/common.c:68
> > poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
> > __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
> > kasan_kmalloc include/linux/kasan.h:260 [inline]
> > __do_kmalloc_node mm/slub.c:4294 [inline]
> > __kmalloc_node_track_caller_noprof+0x222/0x510 mm/slub.c:4313
> > __kmemdup_nul mm/util.c:61 [inline]
> > kstrdup+0x53/0x100 mm/util.c:81
> > kstrdup_const+0x63/0x80 mm/util.c:101
> > kvasprintf_const+0x164/0x1a0 lib/kasprintf.c:46
> > kobject_set_name_vargs+0x5a/0x140 lib/kobject.c:274
> > dev_set_name+0xc8/0x100 drivers/base/core.c:3468
> > assign_name drivers/infiniband/core/device.c:1202 [inline]
> > ib_register_device+0x7e0/0xdf0 drivers/infiniband/core/device.c:1384
> > siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline]
> > siw_newlink drivers/infiniband/sw/siw/siw_main.c:431 [inline]
> > siw_newlink+0xb60/0xd70 drivers/infiniband/sw/siw/siw_main.c:413
> > nldev_newlink+0x38e/0x660 drivers/infiniband/core/nldev.c:1795
> > rdma_nl_rcv_msg+0x388/0x6e0 drivers/infiniband/core/netlink.c:195
> > rdma_nl_rcv_skb.constprop.0.isra.0+0x2e6/0x450
> drivers/infiniband/core/netlink.c:239
> > netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
> > netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1348
> > netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1892
> > sock_sendmsg_nosec net/socket.c:718 [inline]
> > __sock_sendmsg net/socket.c:733 [inline]
> > ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573
> > ___sys_sendmsg+0x135/0x1e0 net/socket.c:2627
> > __sys_sendmsg+0x16e/0x220 net/socket.c:2659
> > do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> > do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> > entry_SYSCALL_64_after_hwframe+0x77/0x7f
> >
> > Freed by task 12485:
> > kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
> > kasan_save_track+0x14/0x30 mm/kasan/common.c:68
> > kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
> > poison_slab_object mm/kasan/common.c:247 [inline]
> > __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
> > kasan_slab_free include/linux/kasan.h:233 [inline]
> > slab_free_hook mm/slub.c:2353 [inline]
> > slab_free mm/slub.c:4609 [inline]
> > kfree+0x2c4/0x4d0 mm/slub.c:4757
> > kfree_const+0x55/0x60 mm/util.c:43
> > kobject_rename+0x179/0x260 lib/kobject.c:524
> > device_rename+0x130/0x230 drivers/base/core.c:4525
> > ib_device_rename+0x114/0x5c0 drivers/infiniband/core/device.c:402
> > nldev_set_doit+0x3be/0x4c0 drivers/infiniband/core/nldev.c:1146
> > rdma_nl_rcv_msg+0x388/0x6e0 drivers/infiniband/core/netlink.c:195
> > rdma_nl_rcv_skb.constprop.0.isra.0+0x2e6/0x450
> drivers/infiniband/core/netlink.c:239
> > netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
> > netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1348
> > netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1892
> > sock_sendmsg_nosec net/socket.c:718 [inline]
> > __sock_sendmsg net/socket.c:733 [inline]
> > ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573
> > ___sys_sendmsg+0x135/0x1e0 net/socket.c:2627
> > __sys_sendmsg+0x16e/0x220 net/socket.c:2659
> > do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> > do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> > entry_SYSCALL_64_after_hwframe+0x77/0x7f
> >
> > The buggy address belongs to the object at ffff88803e895ea0
> > which belongs to the cache kmalloc-8 of size 8
> > The buggy address is located 0 bytes inside of
> > freed 8-byte region [ffff88803e895ea0, ffff88803e895ea8)
> >
> > The buggy address belongs to the physical page:
> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
> pfn:0x3e895
> > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
> > page_type: f5(slab)
> > raw: 00fff00000000000 ffff88801b042500 ffffea0000a05a00 dead000000000002
> > raw: 0000000000000000 0000000000800080 00000000f5000000 0000000000000000
> > page dumped because: kasan: bad access detected
> > page_owner tracks the page as allocated
> > page last allocated via order 0, migratetype Unmovable, gfp_mask
> 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 11986, tgid
> 11985 (syz.1.1513), ts 150711065425, free_ts 150704805794
> > set_page_owner include/linux/page_owner.h:32 [inline]
> > post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551
> > prep_new_page mm/page_alloc.c:1559 [inline]
> > get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477
> > __alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4739
> > alloc_pages_mpol+0x1fc/0x540 mm/mempolicy.c:2270
> > alloc_slab_page mm/slub.c:2423 [inline]
> > allocate_slab mm/slub.c:2587 [inline]
> > new_slab+0x23d/0x330 mm/slub.c:2640
> > ___slab_alloc+0xc5d/0x1720 mm/slub.c:3826
> > __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916
> > __slab_alloc_node mm/slub.c:3991 [inline]
> > slab_alloc_node mm/slub.c:4152 [inline]
> > __do_kmalloc_node mm/slub.c:4293 [inline]
> > __kmalloc_node_noprof+0x2f0/0x510 mm/slub.c:4300
> > __kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:662
> > kvmalloc_array_node_noprof include/linux/slab.h:1063 [inline]
> > __ptr_ring_init_queue_alloc_noprof include/linux/ptr_ring.h:471
> [inline]
> > ptr_ring_resize_multiple_bh_noprof include/linux/ptr_ring.h:634
> [inline]
> > skb_array_resize_multiple_bh_noprof include/linux/skb_array.h:208
> [inline]
> > pfifo_fast_change_tx_queue_len+0x157/0xbb0 net/sched/sch_generic.c:909
> > qdisc_change_tx_queue_len net/sched/sch_generic.c:1410 [inline]
> > dev_qdisc_change_tx_queue_len+0x166/0x380 net/sched/sch_generic.c:1457
> > dev_change_tx_queue_len+0x1a3/0x1e0 net/core/dev.c:9362
> > dev_ifsioc+0xdfe/0x10d0 net/core/dev_ioctl.c:608
> > dev_ioctl+0x224/0x10c0 net/core/dev_ioctl.c:826
> > sock_do_ioctl+0x19e/0x280 net/socket.c:1213
> > sock_ioctl+0x228/0x6c0 net/socket.c:1318
> > page last free pid 11986 tgid 11985 stack trace:
> > reset_page_owner include/linux/page_owner.h:25 [inline]
> > free_pages_prepare mm/page_alloc.c:1127 [inline]
> > free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
> > __put_partials+0x14c/0x170 mm/slub.c:3153
> > qlink_free mm/kasan/quarantine.c:163 [inline]
> > qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
> > kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
> > __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
> > kasan_slab_alloc include/linux/kasan.h:250 [inline]
> > slab_post_alloc_hook mm/slub.c:4115 [inline]
> > slab_alloc_node mm/slub.c:4164 [inline]
> > __kmalloc_cache_noprof+0x243/0x410 mm/slub.c:4320
> > kmalloc_noprof include/linux/slab.h:901 [inline]
> > kmalloc_array_noprof include/linux/slab.h:945 [inline]
> > ptr_ring_resize_multiple_bh_noprof include/linux/ptr_ring.h:629
> [inline]
> > skb_array_resize_multiple_bh_noprof include/linux/skb_array.h:208
> [inline]
> > pfifo_fast_change_tx_queue_len+0xe1/0xbb0 net/sched/sch_generic.c:909
> > qdisc_change_tx_queue_len net/sched/sch_generic.c:1410 [inline]
> > dev_qdisc_change_tx_queue_len+0x166/0x380 net/sched/sch_generic.c:1457
> > dev_change_tx_queue_len+0x1a3/0x1e0 net/core/dev.c:9362
> > dev_ifsioc+0xdfe/0x10d0 net/core/dev_ioctl.c:608
> > dev_ioctl+0x224/0x10c0 net/core/dev_ioctl.c:826
> > sock_do_ioctl+0x19e/0x280 net/socket.c:1213
> > sock_ioctl+0x228/0x6c0 net/socket.c:1318
> > vfs_ioctl fs/ioctl.c:51 [inline]
> > __do_sys_ioctl fs/ioctl.c:906 [inline]
> > __se_sys_ioctl fs/ioctl.c:892 [inline]
> > __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
> > do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> > do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
> > entry_SYSCALL_64_after_hwframe+0x77/0x7f
> >
> > Memory state around the buggy address:
> > ffff88803e895d80: 05 fc fc fc fa fc fc fc 05 fc fc fc fa fc fc fc
> > ffff88803e895e00: 05 fc fc fc 00 fc fc fc 05 fc fc fc fa fc fc fc
> >> ffff88803e895e80: 05 fc fc fc fa fc fc fc 05 fc fc fc 00 fc fc fc
> > ^
> > ffff88803e895f00: 05 fc fc fc 05 fc fc fc 05 fc fc fc fa fc fc fc
> > ffff88803e895f80: 05 fc fc fc 00 fc fc fc 05 fc fc fc fa fc fc fc
> > ==================================================================
> >
> >
> > ---
> > This report is generated by a bot. It may contain errors.
> > See https%
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end of thread, other threads:[~2025-03-20 15:46 UTC | newest]
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2025-02-16 21:55 [syzbot] [rdma?] KASAN: slab-use-after-free Read in ib_device_uevent (2) syzbot
2025-03-19 23:49 ` Jason Gunthorpe
2025-03-20 8:41 ` Zhu Yanjun
2025-03-20 15:45 ` Bernard Metzler
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