[Android 5.15] KASAN: use-after-free Read in move_linked_works (2)
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syzbot
Jan 13, 2024, 4:09:24 PM1/13/24
to syzkaller-a...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: ea2937bdd12f Merge 5.15.145 into android13-5.15-lts
git tree: android13-5.15-lts
console output: https://syzkaller.appspot.com/x/log.txt?x=10af3ca5e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=3a51931024b2d94d
dashboard link: https://syzkaller.appspot.com/bug?extid=c6132e4e3590ee01d3f4
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14c0e9b9e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=139cfc69e80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/5aa99f41bc20/disk-ea2937bd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6abd9b104d6e/vmlinux-ea2937bd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2b9ca8d65970/bzImage-ea2937bd.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c6132e...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __list_del_entry_valid+0xa6/0x120 lib/list_debug.c:62
Read of size 8 at addr ffff88810e71cc70 by task kworker/1:6/567
CPU: 1 PID: 567 Comm: kworker/1:6 Not tainted 5.15.145-syzkaller-00162-gea2937bdd12f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: 0x0 (events)
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
print_address_description+0x87/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:427 [inline]
kasan_report+0x179/0x1c0 mm/kasan/report.c:444
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
__list_del_entry_valid+0xa6/0x120 lib/list_debug.c:62
__list_del_entry include/linux/list.h:132 [inline]
list_move_tail include/linux/list.h:227 [inline]
move_linked_works+0x7c/0x260 kernel/workqueue.c:1104
process_one_work+0x2eb/0xc10 kernel/workqueue.c:2242
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2464
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
Allocated by task 26:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:433 [inline]
____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:512
__kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521
kasan_kmalloc include/linux/kasan.h:227 [inline]
__kmalloc+0x13a/0x270 mm/slub.c:4427
__kmalloc_node include/linux/slab.h:469 [inline]
kmalloc_node include/linux/slab.h:626 [inline]
kvmalloc_node+0x1f0/0x4d0 mm/util.c:628
kvmalloc include/linux/mm.h:851 [inline]
kvzalloc include/linux/mm.h:859 [inline]
alloc_netdev_mqs+0x8c/0xc90 net/core/dev.c:10852
alloc_etherdev_mqs+0x33/0x40 net/ethernet/eth.c:393
usbnet_probe+0x1ff/0x2830 drivers/net/usb/usbnet.c:1694
usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:396
really_probe+0x28d/0x970 drivers/base/dd.c:595
__driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755
driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785
__device_attach_driver+0x2c5/0x470 drivers/base/dd.c:907
bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
__device_attach+0x312/0x510 drivers/base/dd.c:979
device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487
device_add+0xb60/0xf10 drivers/base/core.c:3404
usb_set_configuration+0x190f/0x1e80 drivers/usb/core/message.c:2165
usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238
usb_probe_device+0x144/0x260 drivers/usb/core/driver.c:293
really_probe+0x28d/0x970 drivers/base/dd.c:595
__driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755
driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785
__device_attach_driver+0x2c5/0x470 drivers/base/dd.c:907
bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
__device_attach+0x312/0x510 drivers/base/dd.c:979
device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487
device_add+0xb60/0xf10 drivers/base/core.c:3404
usb_new_device+0x1034/0x1bf0 drivers/usb/core/hub.c:2582
hub_port_connect drivers/usb/core/hub.c:5495 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5635 [inline]
port_event drivers/usb/core/hub.c:5785 [inline]
hub_event+0x2def/0x4770 drivers/usb/core/hub.c:5867
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2317
process_scheduled_works kernel/workqueue.c:2380 [inline]
worker_thread+0xe02/0x12a0 kernel/workqueue.c:2466
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Freed by task 26:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:45
kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365
__kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
kasan_slab_free include/linux/kasan.h:193 [inline]
slab_free_hook mm/slub.c:1723 [inline]
slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749
slab_free mm/slub.c:3519 [inline]
kfree+0xc8/0x220 mm/slub.c:4579
kvfree+0x35/0x40 mm/util.c:664
netdev_freemem+0x3f/0x60 net/core/dev.c:10806
netdev_release+0x7f/0xb0 net/core/net-sysfs.c:1903
device_release+0x95/0x1c0
kobject_cleanup lib/kobject.c:713 [inline]
kobject_release lib/kobject.c:744 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x178/0x260 lib/kobject.c:761
put_device+0x1f/0x30 drivers/base/core.c:3512
free_netdev+0x34f/0x440 net/core/dev.c:10992
usbnet_disconnect+0x245/0x390 drivers/net/usb/usbnet.c:1633
usb_unbind_interface+0x1fa/0x8c0 drivers/usb/core/driver.c:458
__device_release_driver drivers/base/dd.c:1229 [inline]
device_release_driver_internal+0x50b/0x7d0 drivers/base/dd.c:1262
device_release_driver+0x19/0x20 drivers/base/dd.c:1285
bus_remove_device+0x2f8/0x360 drivers/base/bus.c:529
device_del+0x663/0xe90 drivers/base/core.c:3592
usb_disable_device+0x380/0x720 drivers/usb/core/message.c:1414
usb_disconnect+0x32a/0x890 drivers/usb/core/hub.c:2240
hub_port_connect drivers/usb/core/hub.c:5334 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5635 [inline]
port_event drivers/usb/core/hub.c:5785 [inline]
hub_event+0x1d42/0x4770 drivers/usb/core/hub.c:5867
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2317
process_scheduled_works kernel/workqueue.c:2380 [inline]
worker_thread+0xe02/0x12a0 kernel/workqueue.c:2466
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
insert_work+0x56/0x320 kernel/workqueue.c:1373
__queue_work+0x92a/0xcd0 kernel/workqueue.c:1539
queue_work_on+0x105/0x170 kernel/workqueue.c:1566
usbnet_link_change+0xeb/0x100
ax88179_bind+0x88d/0xde0 drivers/net/usb/ax88179_178a.c:1425
usbnet_probe+0xb47/0x2830 drivers/net/usb/usbnet.c:1746
usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:396
really_probe+0x28d/0x970 drivers/base/dd.c:595
__driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755
driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785
__device_attach_driver+0x2c5/0x470 drivers/base/dd.c:907
bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
__device_attach+0x312/0x510 drivers/base/dd.c:979
device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487
device_add+0xb60/0xf10 drivers/base/core.c:3404
usb_set_configuration+0x190f/0x1e80 drivers/usb/core/message.c:2165
usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238
usb_probe_device+0x144/0x260 drivers/usb/core/driver.c:293
really_probe+0x28d/0x970 drivers/base/dd.c:595
__driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755
driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785
__device_attach_driver+0x2c5/0x470 drivers/base/dd.c:907
bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
__device_attach+0x312/0x510 drivers/base/dd.c:979
device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487
device_add+0xb60/0xf10 drivers/base/core.c:3404
usb_new_device+0x1034/0x1bf0 drivers/usb/core/hub.c:2582
hub_port_connect drivers/usb/core/hub.c:5495 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5635 [inline]
port_event drivers/usb/core/hub.c:5785 [inline]
hub_event+0x2def/0x4770 drivers/usb/core/hub.c:5867
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2317
process_scheduled_works kernel/workqueue.c:2380 [inline]
worker_thread+0xe02/0x12a0 kernel/workqueue.c:2466
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
The buggy address belongs to the object at ffff88810e71c000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 3184 bytes inside of
4096-byte region [ffff88810e71c000, ffff88810e71d000)
The buggy address belongs to the page:
page:ffffea000439c600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10e718
head:ffffea000439c600 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043380
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 26, ts 74663670053, free_ts 74505043840
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2604
prep_new_page+0x1b/0x110 mm/page_alloc.c:2610
get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4484
__alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5776
allocate_slab mm/slub.c:1932 [inline]
new_slab+0x9a/0x4e0 mm/slub.c:1995
___slab_alloc+0x39e/0x830 mm/slub.c:3028
__slab_alloc+0x4a/0x90 mm/slub.c:3115
slab_alloc_node mm/slub.c:3206 [inline]
slab_alloc mm/slub.c:3248 [inline]
kmem_cache_alloc_trace+0x142/0x210 mm/slub.c:3265
kmalloc include/linux/slab.h:603 [inline]
kzalloc include/linux/slab.h:733 [inline]
kobject_uevent_env+0x269/0x700 lib/kobject_uevent.c:524
kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:642
device_add+0xa6e/0xf10 drivers/base/core.c:3385
usb_set_configuration+0x190f/0x1e80 drivers/usb/core/message.c:2165
usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238
usb_probe_device+0x144/0x260 drivers/usb/core/driver.c:293
really_probe+0x28d/0x970 drivers/base/dd.c:595
__driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755
page last free stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
free_pages_prepare mm/page_alloc.c:1471 [inline]
free_pcp_prepare mm/page_alloc.c:1543 [inline]
free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3533
free_unref_page+0xe8/0x750 mm/page_alloc.c:3615
free_the_page mm/page_alloc.c:804 [inline]
__free_pages+0x61/0xf0 mm/page_alloc.c:5852
__free_slab+0xec/0x1d0 mm/slub.c:2020
free_slab mm/slub.c:2035 [inline]
discard_slab mm/slub.c:2041 [inline]
__unfreeze_partials+0x165/0x1a0 mm/slub.c:2527
put_cpu_partial+0xc4/0x120 mm/slub.c:2607
__slab_free+0x1c8/0x290 mm/slub.c:3388
do_slab_free mm/slub.c:3507 [inline]
___cache_free+0x109/0x120 mm/slub.c:3526
qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157
qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443
kasan_slab_alloc include/linux/kasan.h:217 [inline]
slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550
slab_alloc_node mm/slub.c:3240 [inline]
slab_alloc mm/slub.c:3248 [inline]
kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253
getname_flags+0xba/0x520 fs/namei.c:138
getname+0x19/0x20 fs/namei.c:217
Memory state around the buggy address:
ffff88810e71cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88810e71cb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88810e71cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88810e71cc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88810e71cd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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 syzk...@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:
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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
syzbot found the following issue on:
HEAD commit: ea2937bdd12f Merge 5.15.145 into android13-5.15-lts
git tree: android13-5.15-lts
console output: https://syzkaller.appspot.com/x/log.txt?x=10af3ca5e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=3a51931024b2d94d
dashboard link: https://syzkaller.appspot.com/bug?extid=c6132e4e3590ee01d3f4
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14c0e9b9e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=139cfc69e80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/5aa99f41bc20/disk-ea2937bd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6abd9b104d6e/vmlinux-ea2937bd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2b9ca8d65970/bzImage-ea2937bd.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c6132e...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __list_del_entry_valid+0xa6/0x120 lib/list_debug.c:62
Read of size 8 at addr ffff88810e71cc70 by task kworker/1:6/567
CPU: 1 PID: 567 Comm: kworker/1:6 Not tainted 5.15.145-syzkaller-00162-gea2937bdd12f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: 0x0 (events)
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
print_address_description+0x87/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:427 [inline]
kasan_report+0x179/0x1c0 mm/kasan/report.c:444
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
__list_del_entry_valid+0xa6/0x120 lib/list_debug.c:62
__list_del_entry include/linux/list.h:132 [inline]
list_move_tail include/linux/list.h:227 [inline]
move_linked_works+0x7c/0x260 kernel/workqueue.c:1104
process_one_work+0x2eb/0xc10 kernel/workqueue.c:2242
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2464
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
Allocated by task 26:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:433 [inline]
____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:512
__kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521
kasan_kmalloc include/linux/kasan.h:227 [inline]
__kmalloc+0x13a/0x270 mm/slub.c:4427
__kmalloc_node include/linux/slab.h:469 [inline]
kmalloc_node include/linux/slab.h:626 [inline]
kvmalloc_node+0x1f0/0x4d0 mm/util.c:628
kvmalloc include/linux/mm.h:851 [inline]
kvzalloc include/linux/mm.h:859 [inline]
alloc_netdev_mqs+0x8c/0xc90 net/core/dev.c:10852
alloc_etherdev_mqs+0x33/0x40 net/ethernet/eth.c:393
usbnet_probe+0x1ff/0x2830 drivers/net/usb/usbnet.c:1694
usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:396
really_probe+0x28d/0x970 drivers/base/dd.c:595
__driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755
driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785
__device_attach_driver+0x2c5/0x470 drivers/base/dd.c:907
bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
__device_attach+0x312/0x510 drivers/base/dd.c:979
device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487
device_add+0xb60/0xf10 drivers/base/core.c:3404
usb_set_configuration+0x190f/0x1e80 drivers/usb/core/message.c:2165
usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238
usb_probe_device+0x144/0x260 drivers/usb/core/driver.c:293
really_probe+0x28d/0x970 drivers/base/dd.c:595
__driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755
driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785
__device_attach_driver+0x2c5/0x470 drivers/base/dd.c:907
bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
__device_attach+0x312/0x510 drivers/base/dd.c:979
device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487
device_add+0xb60/0xf10 drivers/base/core.c:3404
usb_new_device+0x1034/0x1bf0 drivers/usb/core/hub.c:2582
hub_port_connect drivers/usb/core/hub.c:5495 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5635 [inline]
port_event drivers/usb/core/hub.c:5785 [inline]
hub_event+0x2def/0x4770 drivers/usb/core/hub.c:5867
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2317
process_scheduled_works kernel/workqueue.c:2380 [inline]
worker_thread+0xe02/0x12a0 kernel/workqueue.c:2466
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Freed by task 26:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:45
kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365
__kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
kasan_slab_free include/linux/kasan.h:193 [inline]
slab_free_hook mm/slub.c:1723 [inline]
slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749
slab_free mm/slub.c:3519 [inline]
kfree+0xc8/0x220 mm/slub.c:4579
kvfree+0x35/0x40 mm/util.c:664
netdev_freemem+0x3f/0x60 net/core/dev.c:10806
netdev_release+0x7f/0xb0 net/core/net-sysfs.c:1903
device_release+0x95/0x1c0
kobject_cleanup lib/kobject.c:713 [inline]
kobject_release lib/kobject.c:744 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x178/0x260 lib/kobject.c:761
put_device+0x1f/0x30 drivers/base/core.c:3512
free_netdev+0x34f/0x440 net/core/dev.c:10992
usbnet_disconnect+0x245/0x390 drivers/net/usb/usbnet.c:1633
usb_unbind_interface+0x1fa/0x8c0 drivers/usb/core/driver.c:458
__device_release_driver drivers/base/dd.c:1229 [inline]
device_release_driver_internal+0x50b/0x7d0 drivers/base/dd.c:1262
device_release_driver+0x19/0x20 drivers/base/dd.c:1285
bus_remove_device+0x2f8/0x360 drivers/base/bus.c:529
device_del+0x663/0xe90 drivers/base/core.c:3592
usb_disable_device+0x380/0x720 drivers/usb/core/message.c:1414
usb_disconnect+0x32a/0x890 drivers/usb/core/hub.c:2240
hub_port_connect drivers/usb/core/hub.c:5334 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5635 [inline]
port_event drivers/usb/core/hub.c:5785 [inline]
hub_event+0x1d42/0x4770 drivers/usb/core/hub.c:5867
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2317
process_scheduled_works kernel/workqueue.c:2380 [inline]
worker_thread+0xe02/0x12a0 kernel/workqueue.c:2466
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
insert_work+0x56/0x320 kernel/workqueue.c:1373
__queue_work+0x92a/0xcd0 kernel/workqueue.c:1539
queue_work_on+0x105/0x170 kernel/workqueue.c:1566
usbnet_link_change+0xeb/0x100
ax88179_bind+0x88d/0xde0 drivers/net/usb/ax88179_178a.c:1425
usbnet_probe+0xb47/0x2830 drivers/net/usb/usbnet.c:1746
usb_probe_interface+0x5b6/0xa90 drivers/usb/core/driver.c:396
really_probe+0x28d/0x970 drivers/base/dd.c:595
__driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755
driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785
__device_attach_driver+0x2c5/0x470 drivers/base/dd.c:907
bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
__device_attach+0x312/0x510 drivers/base/dd.c:979
device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487
device_add+0xb60/0xf10 drivers/base/core.c:3404
usb_set_configuration+0x190f/0x1e80 drivers/usb/core/message.c:2165
usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238
usb_probe_device+0x144/0x260 drivers/usb/core/driver.c:293
really_probe+0x28d/0x970 drivers/base/dd.c:595
__driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755
driver_probe_device+0x54/0x3d0 drivers/base/dd.c:785
__device_attach_driver+0x2c5/0x470 drivers/base/dd.c:907
bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
__device_attach+0x312/0x510 drivers/base/dd.c:979
device_initial_probe+0x1a/0x20 drivers/base/dd.c:1028
bus_probe_device+0xbe/0x1e0 drivers/base/bus.c:487
device_add+0xb60/0xf10 drivers/base/core.c:3404
usb_new_device+0x1034/0x1bf0 drivers/usb/core/hub.c:2582
hub_port_connect drivers/usb/core/hub.c:5495 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5635 [inline]
port_event drivers/usb/core/hub.c:5785 [inline]
hub_event+0x2def/0x4770 drivers/usb/core/hub.c:5867
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2317
process_scheduled_works kernel/workqueue.c:2380 [inline]
worker_thread+0xe02/0x12a0 kernel/workqueue.c:2466
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
The buggy address belongs to the object at ffff88810e71c000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 3184 bytes inside of
4096-byte region [ffff88810e71c000, ffff88810e71d000)
The buggy address belongs to the page:
page:ffffea000439c600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10e718
head:ffffea000439c600 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043380
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 26, ts 74663670053, free_ts 74505043840
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2604
prep_new_page+0x1b/0x110 mm/page_alloc.c:2610
get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4484
__alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5776
allocate_slab mm/slub.c:1932 [inline]
new_slab+0x9a/0x4e0 mm/slub.c:1995
___slab_alloc+0x39e/0x830 mm/slub.c:3028
__slab_alloc+0x4a/0x90 mm/slub.c:3115
slab_alloc_node mm/slub.c:3206 [inline]
slab_alloc mm/slub.c:3248 [inline]
kmem_cache_alloc_trace+0x142/0x210 mm/slub.c:3265
kmalloc include/linux/slab.h:603 [inline]
kzalloc include/linux/slab.h:733 [inline]
kobject_uevent_env+0x269/0x700 lib/kobject_uevent.c:524
kobject_uevent+0x1f/0x30 lib/kobject_uevent.c:642
device_add+0xa6e/0xf10 drivers/base/core.c:3385
usb_set_configuration+0x190f/0x1e80 drivers/usb/core/message.c:2165
usb_generic_driver_probe+0x8b/0x150 drivers/usb/core/generic.c:238
usb_probe_device+0x144/0x260 drivers/usb/core/driver.c:293
really_probe+0x28d/0x970 drivers/base/dd.c:595
__driver_probe_device+0x1a0/0x310 drivers/base/dd.c:755
page last free stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
free_pages_prepare mm/page_alloc.c:1471 [inline]
free_pcp_prepare mm/page_alloc.c:1543 [inline]
free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3533
free_unref_page+0xe8/0x750 mm/page_alloc.c:3615
free_the_page mm/page_alloc.c:804 [inline]
__free_pages+0x61/0xf0 mm/page_alloc.c:5852
__free_slab+0xec/0x1d0 mm/slub.c:2020
free_slab mm/slub.c:2035 [inline]
discard_slab mm/slub.c:2041 [inline]
__unfreeze_partials+0x165/0x1a0 mm/slub.c:2527
put_cpu_partial+0xc4/0x120 mm/slub.c:2607
__slab_free+0x1c8/0x290 mm/slub.c:3388
do_slab_free mm/slub.c:3507 [inline]
___cache_free+0x109/0x120 mm/slub.c:3526
qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157
qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443
kasan_slab_alloc include/linux/kasan.h:217 [inline]
slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550
slab_alloc_node mm/slub.c:3240 [inline]
slab_alloc mm/slub.c:3248 [inline]
kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253
getname_flags+0xba/0x520 fs/namei.c:138
getname+0x19/0x20 fs/namei.c:217
Memory state around the buggy address:
ffff88810e71cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88810e71cb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88810e71cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88810e71cc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88810e71cd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
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syzbot
Feb 23, 2026, 3:13:25 PMFeb 23
to syzkaller-a...@googlegroups.com
Auto-closing this bug as obsolete.
No recent activity, existing reproducers are no longer triggering the issue.
No recent activity, existing reproducers are no longer triggering the issue.
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