==================================================================
BUG: KASAN: use-after-free in __list_del_entry_valid+0xa6/0x130 lib/list_debug.c:62
Read of size 8 at addr ffff888118d78cf0 by task kworker/0:2/287
CPU: 0 PID: 287 Comm: kworker/0:2 Not tainted 6.1.134-syzkaller-00012-g646380b087a5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: events_long br_fdb_cleanup
Call Trace:
<TASK>
__dump_stack+0x21/0x24 lib/dump_stack.c:88
dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106
print_address_description+0x71/0x210 mm/kasan/report.c:316
print_report+0x4a/0x60 mm/kasan/report.c:427
kasan_report+0x122/0x150 mm/kasan/report.c:531
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:351
__list_del_entry_valid+0xa6/0x130 lib/list_debug.c:62
__list_del_entry include/linux/list.h:134 [inline]
list_del_init include/linux/list.h:206 [inline]
process_one_work+0x4b9/0xc40 kernel/workqueue.c:2243
worker_thread+0xa29/0x11f0 kernel/workqueue.c:2446
kthread+0x281/0x320 kernel/kthread.c:386
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Allocated by task 305:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_alloc_info+0x25/0x30 mm/kasan/generic.c:505
____kasan_kmalloc mm/kasan/common.c:379 [inline]
__kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:388
kasan_kmalloc include/linux/kasan.h:212 [inline]
__do_kmalloc_node mm/slab_common.c:938 [inline]
__kmalloc_node+0xb2/0x1e0 mm/slab_common.c:945
kmalloc_node include/linux/slab.h:589 [inline]
kvmalloc_node+0x294/0x480 mm/util.c:592
kvmalloc include/linux/slab.h:716 [inline]
kvzalloc include/linux/slab.h:724 [inline]
alloc_netdev_mqs+0x8d/0xf90 net/core/dev.c:10680
alloc_etherdev_mqs+0x37/0x40 net/ethernet/eth.c:384
usbnet_probe+0x20c/0x2780 drivers/net/usb/usbnet.c:1720
usb_probe_interface+0x610/0xaf0 drivers/usb/core/driver.c:397
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x2cb/0x960 drivers/base/dd.c:639
__driver_probe_device+0x198/0x280 drivers/base/dd.c:808
driver_probe_device+0x54/0x3e0 drivers/base/dd.c:838
__device_attach_driver+0x2e9/0x4a0 drivers/base/dd.c:966
bus_for_each_drv+0x183/0x210 drivers/base/bus.c:429
__device_attach+0x2a2/0x400 drivers/base/dd.c:1038
device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
bus_probe_device+0xc0/0x1f0 drivers/base/bus.c:489
device_add+0xb4d/0xef0 drivers/base/core.c:3698
usb_set_configuration+0x19c2/0x1f10 drivers/usb/core/message.c:2165
usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238
usb_probe_device+0x159/0x270 drivers/usb/core/driver.c:294
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x2cb/0x960 drivers/base/dd.c:639
__driver_probe_device+0x198/0x280 drivers/base/dd.c:808
driver_probe_device+0x54/0x3e0 drivers/base/dd.c:838
__device_attach_driver+0x2e9/0x4a0 drivers/base/dd.c:966
bus_for_each_drv+0x183/0x210 drivers/base/bus.c:429
__device_attach+0x2a2/0x400 drivers/base/dd.c:1038
device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
bus_probe_device+0xc0/0x1f0 drivers/base/bus.c:489
device_add+0xb4d/0xef0 drivers/base/core.c:3698
usb_new_device+0xa70/0x1520 drivers/usb/core/hub.c:2656
hub_port_connect drivers/usb/core/hub.c:5566 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
port_event drivers/usb/core/hub.c:5866 [inline]
hub_event+0x2a5d/0x4680 drivers/usb/core/hub.c:5948
process_one_work+0x71f/0xc40 kernel/workqueue.c:2299
worker_thread+0xa29/0x11f0 kernel/workqueue.c:2446
kthread+0x281/0x320 kernel/kthread.c:386
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Freed by task 305:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x31/0x50 mm/kasan/generic.c:516
____kasan_slab_free+0x132/0x180 mm/kasan/common.c:241
__kasan_slab_free+0x11/0x20 mm/kasan/common.c:249
kasan_slab_free include/linux/kasan.h:178 [inline]
slab_free_hook mm/slub.c:1745 [inline]
slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1771
slab_free mm/slub.c:3686 [inline]
__kmem_cache_free+0xb7/0x1b0 mm/slub.c:3702
kfree+0x6f/0xf0 mm/slab_common.c:990
kvfree+0x35/0x40 mm/util.c:639
netdev_freemem+0x3f/0x60 net/core/dev.c:10634
netdev_release+0x7f/0xb0 net/core/net-sysfs.c:1904
device_release+0xa4/0x1d0 drivers/base/core.c:-1
kobject_cleanup lib/kobject.c:681 [inline]
kobject_release lib/kobject.c:712 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x19d/0x280 lib/kobject.c:729
put_device+0x1f/0x30 drivers/base/core.c:3806
free_netdev+0x392/0x490 net/core/dev.c:10827
usbnet_disconnect+0x25a/0x3b0 drivers/net/usb/usbnet.c:1659
usb_unbind_interface+0x223/0x8d0 drivers/usb/core/driver.c:459
device_remove drivers/base/dd.c:550 [inline]
__device_release_driver drivers/base/dd.c:1283 [inline]
device_release_driver_internal+0x508/0x820 drivers/base/dd.c:1309
device_release_driver+0x19/0x20 drivers/base/dd.c:1332
bus_remove_device+0x2ee/0x350 drivers/base/bus.c:531
device_del+0x6a4/0xeb0 drivers/base/core.c:3886
usb_disable_device+0x3a8/0x750 drivers/usb/core/message.c:1414
usb_disconnect+0x31e/0x860 drivers/usb/core/hub.c:2311
hub_port_connect drivers/usb/core/hub.c:5405 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
port_event drivers/usb/core/hub.c:5866 [inline]
hub_event+0x1bd5/0x4680 drivers/usb/core/hub.c:5948
process_one_work+0x71f/0xc40 kernel/workqueue.c:2299
process_scheduled_works kernel/workqueue.c:2362 [inline]
worker_thread+0xd2e/0x11f0 kernel/workqueue.c:2448
kthread+0x281/0x320 kernel/kthread.c:386
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Last potentially related work creation:
kasan_save_stack+0x3a/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb6/0xc0 mm/kasan/generic.c:486
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
insert_work+0x51/0x300 kernel/workqueue.c:1368
__queue_work+0x9b1/0xd30 kernel/workqueue.c:1527
queue_work_on+0xd2/0x140 kernel/workqueue.c:1555
queue_work include/linux/workqueue.h:510 [inline]
schedule_work include/linux/workqueue.h:571 [inline]
usbnet_defer_kevent drivers/net/usb/usbnet.c:479 [inline]
usbnet_link_change+0x176/0x1a0 drivers/net/usb/usbnet.c:-1
usbnet_probe+0x1d55/0x2780 drivers/net/usb/usbnet.c:1865
usb_probe_interface+0x610/0xaf0 drivers/usb/core/driver.c:397
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x2cb/0x960 drivers/base/dd.c:639
__driver_probe_device+0x198/0x280 drivers/base/dd.c:808
driver_probe_device+0x54/0x3e0 drivers/base/dd.c:838
__device_attach_driver+0x2e9/0x4a0 drivers/base/dd.c:966
bus_for_each_drv+0x183/0x210 drivers/base/bus.c:429
__device_attach+0x2a2/0x400 drivers/base/dd.c:1038
device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
bus_probe_device+0xc0/0x1f0 drivers/base/bus.c:489
device_add+0xb4d/0xef0 drivers/base/core.c:3698
usb_set_configuration+0x19c2/0x1f10 drivers/usb/core/message.c:2165
usb_generic_driver_probe+0x91/0x150 drivers/usb/core/generic.c:238
usb_probe_device+0x159/0x270 drivers/usb/core/driver.c:294
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x2cb/0x960 drivers/base/dd.c:639
__driver_probe_device+0x198/0x280 drivers/base/dd.c:808
driver_probe_device+0x54/0x3e0 drivers/base/dd.c:838
__device_attach_driver+0x2e9/0x4a0 drivers/base/dd.c:966
bus_for_each_drv+0x183/0x210 drivers/base/bus.c:429
__device_attach+0x2a2/0x400 drivers/base/dd.c:1038
device_initial_probe+0x1a/0x20 drivers/base/dd.c:1087
bus_probe_device+0xc0/0x1f0 drivers/base/bus.c:489
device_add+0xb4d/0xef0 drivers/base/core.c:3698
usb_new_device+0xa70/0x1520 drivers/usb/core/hub.c:2656
hub_port_connect drivers/usb/core/hub.c:5566 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
port_event drivers/usb/core/hub.c:5866 [inline]
hub_event+0x2a5d/0x4680 drivers/usb/core/hub.c:5948
process_one_work+0x71f/0xc40 kernel/workqueue.c:2299
worker_thread+0xa29/0x11f0 kernel/workqueue.c:2446
kthread+0x281/0x320 kernel/kthread.c:386
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
The buggy address belongs to the object at ffff888118d78000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 3312 bytes inside of
4096-byte region [ffff888118d78000, ffff888118d79000)
The buggy address belongs to the physical page:
page:ffffea0004635e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x118d78
head:ffffea0004635e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000001 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 0x1d60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 509, tgid 509 (syz-executor), ts 55936314598, free_ts 49783667161
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2637
prep_new_page+0x1c/0x110 mm/page_alloc.c:2644
get_page_from_freelist+0x2c6e/0x2ce0 mm/page_alloc.c:4539
__alloc_pages+0x19e/0x3a0 mm/page_alloc.c:5838
alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
allocate_slab mm/slub.c:1962 [inline]
new_slab+0x98/0x3d0 mm/slub.c:2015
___slab_alloc+0x6f6/0xb50 mm/slub.c:3203
__slab_alloc+0x5e/0xa0 mm/slub.c:3302
slab_alloc_node mm/slub.c:3387 [inline]
__kmem_cache_alloc_node+0x203/0x2c0 mm/slub.c:3462
__do_kmalloc_node mm/slab_common.c:937 [inline]
__kmalloc_node+0xa1/0x1e0 mm/slab_common.c:945
kmalloc_node include/linux/slab.h:589 [inline]
kvmalloc_node+0x294/0x480 mm/util.c:592
kvmalloc include/linux/slab.h:716 [inline]
kvzalloc include/linux/slab.h:724 [inline]
alloc_netdev_mqs+0x8d/0xf90 net/core/dev.c:10680
rtnl_create_link+0x319/0xb10 net/core/rtnetlink.c:3295
veth_newlink+0x28e/0xbe0 drivers/net/veth.c:1729
rtnl_newlink_create net/core/rtnetlink.c:3422 [inline]
__rtnl_newlink net/core/rtnetlink.c:3642 [inline]
rtnl_newlink+0x14b9/0x2030 net/core/rtnetlink.c:3655
rtnetlink_rcv_msg+0x9f4/0xcf0 net/core/rtnetlink.c:6153
page last free stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
free_pages_prepare mm/page_alloc.c:1545 [inline]
free_pcp_prepare mm/page_alloc.c:1619 [inline]
free_unref_page_prepare+0x742/0x750 mm/page_alloc.c:3581
free_unref_page+0x8f/0x530 mm/page_alloc.c:3677
free_the_page mm/page_alloc.c:830 [inline]
__free_pages+0x67/0x100 mm/page_alloc.c:5927
__free_slab+0xca/0x1a0 mm/slub.c:2039
free_slab mm/slub.c:2054 [inline]
discard_slab mm/slub.c:2060 [inline]
__unfreeze_partials+0x160/0x190 mm/slub.c:2609
put_cpu_partial+0xa9/0x100 mm/slub.c:2685
__slab_free+0x1c4/0x280 mm/slub.c:3563
do_slab_free mm/slub.c:3640 [inline]
___cache_free+0xbf/0xd0 mm/slub.c:3696
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0xc6/0x140 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x24/0x80 mm/kasan/common.c:310
kasan_slab_alloc include/linux/kasan.h:202 [inline]
slab_post_alloc_hook+0x4f/0x2d0 mm/slab.h:768
slab_alloc_node mm/slub.c:3421 [inline]
slab_alloc mm/slub.c:3431 [inline]
__kmem_cache_alloc_lru mm/slub.c:3438 [inline]
kmem_cache_alloc+0x16e/0x330 mm/slub.c:3447
mt_alloc_one lib/maple_tree.c:155 [inline]
mas_alloc_nodes+0x2d8/0x850 lib/maple_tree.c:1282
mas_node_count_gfp lib/maple_tree.c:1364 [inline]
mas_preallocate+0xdcf/0x1390 lib/maple_tree.c:5660
vma_expand+0x3b7/0xa10 mm/mmap.c:559
Memory state around the buggy address:
ffff888118d78b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888118d78c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888118d78c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888118d78d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888118d78d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================