[v5.15] KASAN: use-after-free Read in kernfs_next_descendant_post (4)
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syzbot
9:08 AM (7 hours ago) 9:08 AM
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 91d48252ad4b Linux 5.15.202
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17597b16580000
kernel config: https://syzkaller.appspot.com/x/.config?x=353ae28c40b35af5
dashboard link: https://syzkaller.appspot.com/bug?extid=94c404181b763919a4b6
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/74e75dfcb812/disk-91d48252.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/bfa72aab00f2/vmlinux-91d48252.xz
kernel image: https://storage.googleapis.com/syzbot-assets/47ea72d1c7dc/bzImage-91d48252.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+94c404...@syzkaller.appspotmail.com
usb 1-1: Direct firmware load for ueagle-atm/eagleI.fw failed with error -2
usb 1-1: Falling back to sysfs fallback for: ueagle-atm/eagleI.fw
==================================================================
BUG: KASAN: use-after-free in kernfs_type include/linux/kernfs.h:294 [inline]
BUG: KASAN: use-after-free in kernfs_leftmost_descendant fs/kernfs/dir.c:1251 [inline]
BUG: KASAN: use-after-free in kernfs_next_descendant_post+0x184/0x200 fs/kernfs/dir.c:1282
Read of size 2 at addr ffff888061938520 by task kworker/1:0/21
CPU: 1 PID: 21 Comm: kworker/1:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: events request_firmware_work_func
Call Trace:
<TASK>
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
print_address_description+0x60/0x2d0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0xdf/0x130 mm/kasan/report.c:451
kernfs_type include/linux/kernfs.h:294 [inline]
kernfs_leftmost_descendant fs/kernfs/dir.c:1251 [inline]
kernfs_next_descendant_post+0x184/0x200 fs/kernfs/dir.c:1282
kernfs_activate+0x28/0x210 fs/kernfs/dir.c:1317
kernfs_add_one+0x55d/0x6c0 fs/kernfs/dir.c:788
kernfs_create_dir_ns+0xda/0x120 fs/kernfs/dir.c:1015
sysfs_create_dir_ns+0x12c/0x290 fs/sysfs/dir.c:59
create_dir lib/kobject.c:89 [inline]
kobject_add_internal+0x6e0/0xd90 lib/kobject.c:263
kobject_add_varg lib/kobject.c:398 [inline]
kobject_add+0x160/0x230 lib/kobject.c:450
class_dir_create_and_add drivers/base/core.c:2966 [inline]
get_device_parent+0x380/0x3f0 drivers/base/core.c:3021
device_add+0x335/0xfb0 drivers/base/core.c:3333
fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:507 [inline]
fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:583 [inline]
firmware_fallback_sysfs+0x3e9/0xbc0 drivers/base/firmware_loader/fallback.c:659
_request_firmware+0xc86/0x12b0 drivers/base/firmware_loader/main.c:876
request_firmware_work_func+0xac/0x1b0 drivers/base/firmware_loader/main.c:1127
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Allocated by task 21:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3225 [inline]
slab_alloc mm/slub.c:3233 [inline]
kmem_cache_alloc+0x100/0x290 mm/slub.c:3238
kmem_cache_zalloc include/linux/slab.h:728 [inline]
__kernfs_new_node+0xe3/0x6c0 fs/kernfs/dir.c:593
kernfs_new_node+0x148/0x250 fs/kernfs/dir.c:669
kernfs_create_dir_ns+0x40/0x120 fs/kernfs/dir.c:1005
sysfs_create_dir_ns+0x12c/0x290 fs/sysfs/dir.c:59
create_dir lib/kobject.c:89 [inline]
kobject_add_internal+0x6e0/0xd90 lib/kobject.c:263
kobject_add_varg lib/kobject.c:398 [inline]
kobject_add+0x160/0x230 lib/kobject.c:450
class_dir_create_and_add drivers/base/core.c:2966 [inline]
get_device_parent+0x380/0x3f0 drivers/base/core.c:3021
device_add+0x335/0xfb0 drivers/base/core.c:3333
fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:507 [inline]
fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:583 [inline]
firmware_fallback_sysfs+0x3e9/0xbc0 drivers/base/firmware_loader/fallback.c:659
_request_firmware+0xc86/0x12b0 drivers/base/firmware_loader/main.c:876
request_firmware_work_func+0xac/0x1b0 drivers/base/firmware_loader/main.c:1127
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Freed by task 2287:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1710 [inline]
slab_free_freelist_hook+0xea/0x170 mm/slub.c:1736
slab_free mm/slub.c:3504 [inline]
kmem_cache_free+0x8f/0x210 mm/slub.c:3520
kernfs_put+0x319/0x490 fs/kernfs/dir.c:547
__kernfs_remove+0x9d0/0xc70 fs/kernfs/dir.c:1393
kernfs_remove+0x1d/0x30 fs/kernfs/dir.c:1406
__kobject_del+0xe1/0x2f0 lib/kobject.c:628
kobject_del+0x41/0x60 lib/kobject.c:651
device_del+0x984/0xaf0 drivers/base/core.c:3612
usb_disconnect+0x573/0x8a0 drivers/usb/core/hub.c:2313
hub_port_connect drivers/usb/core/hub.c:5341 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5637 [inline]
port_event drivers/usb/core/hub.c:5799 [inline]
hub_event+0x1ecb/0x55e0 drivers/usb/core/hub.c:5881
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
process_scheduled_works kernel/workqueue.c:2373 [inline]
worker_thread+0xd60/0x1290 kernel/workqueue.c:2459
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
The buggy address belongs to the object at ffff888061938488
which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 152 bytes inside of
168-byte region [ffff888061938488, ffff888061938530)
The buggy address belongs to the page:
page:ffffea0001864e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x61938
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 0000000000000000 dead000000000122 ffff888016de9b40
raw: 0000000000000000 0000000080110011 00000001ffffffff 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 2287, ts 76325693737, free_ts 76279681916
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192
__alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
alloc_slab_page mm/slub.c:1780 [inline]
allocate_slab mm/slub.c:1917 [inline]
new_slab+0xc0/0x4b0 mm/slub.c:1980
___slab_alloc+0x80a/0xdd0 mm/slub.c:3013
__slab_alloc mm/slub.c:3100 [inline]
slab_alloc_node mm/slub.c:3191 [inline]
slab_alloc mm/slub.c:3233 [inline]
kmem_cache_alloc+0x195/0x290 mm/slub.c:3238
kmem_cache_zalloc include/linux/slab.h:728 [inline]
__kernfs_new_node+0xe3/0x6c0 fs/kernfs/dir.c:593
kernfs_new_node+0x148/0x250 fs/kernfs/dir.c:669
__kernfs_create_file+0x47/0x2e0 fs/kernfs/file.c:985
sysfs_add_file_mode_ns+0x2d4/0x3a0 fs/sysfs/file.c:317
sysfs_merge_group+0x182/0x320 fs/sysfs/group.c:343
dpm_sysfs_add+0xce/0x270 drivers/base/power/sysfs.c:707
device_add+0x715/0xfb0 drivers/base/core.c:3369
usb_create_ep_devs+0x128/0x220 drivers/usb/core/endpoint.c:169
usb_new_device+0xe86/0x1660 drivers/usb/core/hub.c:2660
hub_port_connect drivers/usb/core/hub.c:5497 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5637 [inline]
port_event drivers/usb/core/hub.c:5799 [inline]
hub_event+0x2e4a/0x55e0 drivers/usb/core/hub.c:5881
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396
free_slab mm/slub.c:2020 [inline]
discard_slab mm/slub.c:2026 [inline]
__unfreeze_partials+0x1a5/0x200 mm/slub.c:2512
put_cpu_partial+0x12d/0x190 mm/slub.c:2592
qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3225 [inline]
slab_alloc mm/slub.c:3233 [inline]
kmem_cache_alloc_trace+0x103/0x2a0 mm/slub.c:3250
kmalloc include/linux/slab.h:607 [inline]
kzalloc include/linux/slab.h:738 [inline]
device_private_init drivers/base/core.c:3256 [inline]
device_add+0xba/0xfb0 drivers/base/core.c:3306
usb_set_configuration+0x1991/0x1fd0 drivers/usb/core/message.c:2165
usb_generic_driver_probe+0x89/0x150 drivers/usb/core/generic.c:238
usb_probe_device+0x139/0x270 drivers/usb/core/driver.c:293
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x284/0xc80 drivers/base/dd.c:595
__driver_probe_device+0x18c/0x330 drivers/base/dd.c:755
driver_probe_device+0x4f/0x420 drivers/base/dd.c:785
Memory state around the buggy address:
ffff888061938400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
ffff888061938480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888061938500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
^
ffff888061938580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888061938600: fc fc fc fc fc fc fc fc fc fc fc fc fc 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 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 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: 91d48252ad4b Linux 5.15.202
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17597b16580000
kernel config: https://syzkaller.appspot.com/x/.config?x=353ae28c40b35af5
dashboard link: https://syzkaller.appspot.com/bug?extid=94c404181b763919a4b6
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/74e75dfcb812/disk-91d48252.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/bfa72aab00f2/vmlinux-91d48252.xz
kernel image: https://storage.googleapis.com/syzbot-assets/47ea72d1c7dc/bzImage-91d48252.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+94c404...@syzkaller.appspotmail.com
usb 1-1: Direct firmware load for ueagle-atm/eagleI.fw failed with error -2
usb 1-1: Falling back to sysfs fallback for: ueagle-atm/eagleI.fw
==================================================================
BUG: KASAN: use-after-free in kernfs_type include/linux/kernfs.h:294 [inline]
BUG: KASAN: use-after-free in kernfs_leftmost_descendant fs/kernfs/dir.c:1251 [inline]
BUG: KASAN: use-after-free in kernfs_next_descendant_post+0x184/0x200 fs/kernfs/dir.c:1282
Read of size 2 at addr ffff888061938520 by task kworker/1:0/21
CPU: 1 PID: 21 Comm: kworker/1:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: events request_firmware_work_func
Call Trace:
<TASK>
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
print_address_description+0x60/0x2d0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0xdf/0x130 mm/kasan/report.c:451
kernfs_type include/linux/kernfs.h:294 [inline]
kernfs_leftmost_descendant fs/kernfs/dir.c:1251 [inline]
kernfs_next_descendant_post+0x184/0x200 fs/kernfs/dir.c:1282
kernfs_activate+0x28/0x210 fs/kernfs/dir.c:1317
kernfs_add_one+0x55d/0x6c0 fs/kernfs/dir.c:788
kernfs_create_dir_ns+0xda/0x120 fs/kernfs/dir.c:1015
sysfs_create_dir_ns+0x12c/0x290 fs/sysfs/dir.c:59
create_dir lib/kobject.c:89 [inline]
kobject_add_internal+0x6e0/0xd90 lib/kobject.c:263
kobject_add_varg lib/kobject.c:398 [inline]
kobject_add+0x160/0x230 lib/kobject.c:450
class_dir_create_and_add drivers/base/core.c:2966 [inline]
get_device_parent+0x380/0x3f0 drivers/base/core.c:3021
device_add+0x335/0xfb0 drivers/base/core.c:3333
fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:507 [inline]
fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:583 [inline]
firmware_fallback_sysfs+0x3e9/0xbc0 drivers/base/firmware_loader/fallback.c:659
_request_firmware+0xc86/0x12b0 drivers/base/firmware_loader/main.c:876
request_firmware_work_func+0xac/0x1b0 drivers/base/firmware_loader/main.c:1127
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>
Allocated by task 21:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3225 [inline]
slab_alloc mm/slub.c:3233 [inline]
kmem_cache_alloc+0x100/0x290 mm/slub.c:3238
kmem_cache_zalloc include/linux/slab.h:728 [inline]
__kernfs_new_node+0xe3/0x6c0 fs/kernfs/dir.c:593
kernfs_new_node+0x148/0x250 fs/kernfs/dir.c:669
kernfs_create_dir_ns+0x40/0x120 fs/kernfs/dir.c:1005
sysfs_create_dir_ns+0x12c/0x290 fs/sysfs/dir.c:59
create_dir lib/kobject.c:89 [inline]
kobject_add_internal+0x6e0/0xd90 lib/kobject.c:263
kobject_add_varg lib/kobject.c:398 [inline]
kobject_add+0x160/0x230 lib/kobject.c:450
class_dir_create_and_add drivers/base/core.c:2966 [inline]
get_device_parent+0x380/0x3f0 drivers/base/core.c:3021
device_add+0x335/0xfb0 drivers/base/core.c:3333
fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:507 [inline]
fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:583 [inline]
firmware_fallback_sysfs+0x3e9/0xbc0 drivers/base/firmware_loader/fallback.c:659
_request_firmware+0xc86/0x12b0 drivers/base/firmware_loader/main.c:876
request_firmware_work_func+0xac/0x1b0 drivers/base/firmware_loader/main.c:1127
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Freed by task 2287:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1710 [inline]
slab_free_freelist_hook+0xea/0x170 mm/slub.c:1736
slab_free mm/slub.c:3504 [inline]
kmem_cache_free+0x8f/0x210 mm/slub.c:3520
kernfs_put+0x319/0x490 fs/kernfs/dir.c:547
__kernfs_remove+0x9d0/0xc70 fs/kernfs/dir.c:1393
kernfs_remove+0x1d/0x30 fs/kernfs/dir.c:1406
__kobject_del+0xe1/0x2f0 lib/kobject.c:628
kobject_del+0x41/0x60 lib/kobject.c:651
device_del+0x984/0xaf0 drivers/base/core.c:3612
usb_disconnect+0x573/0x8a0 drivers/usb/core/hub.c:2313
hub_port_connect drivers/usb/core/hub.c:5341 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5637 [inline]
port_event drivers/usb/core/hub.c:5799 [inline]
hub_event+0x1ecb/0x55e0 drivers/usb/core/hub.c:5881
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
process_scheduled_works kernel/workqueue.c:2373 [inline]
worker_thread+0xd60/0x1290 kernel/workqueue.c:2459
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
The buggy address belongs to the object at ffff888061938488
which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 152 bytes inside of
168-byte region [ffff888061938488, ffff888061938530)
The buggy address belongs to the page:
page:ffffea0001864e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x61938
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 0000000000000000 dead000000000122 ffff888016de9b40
raw: 0000000000000000 0000000080110011 00000001ffffffff 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 2287, ts 76325693737, free_ts 76279681916
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x1bbd/0x1ca0 mm/page_alloc.c:4192
__alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
alloc_slab_page mm/slub.c:1780 [inline]
allocate_slab mm/slub.c:1917 [inline]
new_slab+0xc0/0x4b0 mm/slub.c:1980
___slab_alloc+0x80a/0xdd0 mm/slub.c:3013
__slab_alloc mm/slub.c:3100 [inline]
slab_alloc_node mm/slub.c:3191 [inline]
slab_alloc mm/slub.c:3233 [inline]
kmem_cache_alloc+0x195/0x290 mm/slub.c:3238
kmem_cache_zalloc include/linux/slab.h:728 [inline]
__kernfs_new_node+0xe3/0x6c0 fs/kernfs/dir.c:593
kernfs_new_node+0x148/0x250 fs/kernfs/dir.c:669
__kernfs_create_file+0x47/0x2e0 fs/kernfs/file.c:985
sysfs_add_file_mode_ns+0x2d4/0x3a0 fs/sysfs/file.c:317
sysfs_merge_group+0x182/0x320 fs/sysfs/group.c:343
dpm_sysfs_add+0xce/0x270 drivers/base/power/sysfs.c:707
device_add+0x715/0xfb0 drivers/base/core.c:3369
usb_create_ep_devs+0x128/0x220 drivers/usb/core/endpoint.c:169
usb_new_device+0xe86/0x1660 drivers/usb/core/hub.c:2660
hub_port_connect drivers/usb/core/hub.c:5497 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5637 [inline]
port_event drivers/usb/core/hub.c:5799 [inline]
hub_event+0x2e4a/0x55e0 drivers/usb/core/hub.c:5881
process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1340 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
free_unref_page+0x8f/0x2a0 mm/page_alloc.c:3396
free_slab mm/slub.c:2020 [inline]
discard_slab mm/slub.c:2026 [inline]
__unfreeze_partials+0x1a5/0x200 mm/slub.c:2512
put_cpu_partial+0x12d/0x190 mm/slub.c:2592
qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3225 [inline]
slab_alloc mm/slub.c:3233 [inline]
kmem_cache_alloc_trace+0x103/0x2a0 mm/slub.c:3250
kmalloc include/linux/slab.h:607 [inline]
kzalloc include/linux/slab.h:738 [inline]
device_private_init drivers/base/core.c:3256 [inline]
device_add+0xba/0xfb0 drivers/base/core.c:3306
usb_set_configuration+0x1991/0x1fd0 drivers/usb/core/message.c:2165
usb_generic_driver_probe+0x89/0x150 drivers/usb/core/generic.c:238
usb_probe_device+0x139/0x270 drivers/usb/core/driver.c:293
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x284/0xc80 drivers/base/dd.c:595
__driver_probe_device+0x18c/0x330 drivers/base/dd.c:755
driver_probe_device+0x4f/0x420 drivers/base/dd.c:785
Memory state around the buggy address:
ffff888061938400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
ffff888061938480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888061938500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc
^
ffff888061938580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888061938600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
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