INFO: task kworker/0:1:10 blocked for more than 124 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1     state:D stack:0     pid:10    tgid:10    ppid:2      flags:0x00004000
Workqueue: events fqdir_free_fn
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5945 [inline]
 __schedule+0x1322/0x1df0 kernel/sched/core.c:7791
 __schedule_loop kernel/sched/core.c:7872 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:7887
 schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x359/0x630 kernel/sched/completion.c:127
 wait_for_completion+0x1c/0x40 kernel/sched/completion.c:148
 rcu_barrier+0x415/0x530 kernel/rcu/tree.c:4657
 fqdir_free_fn+0x36/0x150 net/ipv4/inet_fragment.c:167
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x7d2/0x1020 kernel/workqueue.c:3319
 worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
 kthread+0x2ca/0x370 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
 watchdog+0xd8f/0xed0 kernel/hung_task.c:423
 kthread+0x2ca/0x370 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 1 Comm: init Not tainted syzkaller #0 0b5ffdee5fcd2f7749818d1ff954e9c21353764e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:stack_trace_consume_entry+0xa6/0x2a0 kernel/stacktrace.c:93
Code: 41 0f b6 04 17 84 c0 0f 85 8d 01 00 00 45 89 34 24 b0 01 e9 a2 00 00 00 31 c0 e9 9b 00 00 00 48 89 f8 48 c1 e8 03 80 3c 10 00 <48> 89 75 c0 74 2b 49 89 ff 49 89 d4 4c 89 45 c8 4d 89 ce 4c 89 55
RSP: 0018:ffffc90000017670 EFLAGS: 00000246
RAX: 1ffff92000002ef0 RBX: 1ffff92000002ef2 RCX: 0000000000017700
RDX: dffffc0000000000 RSI: ffffffff81d8a36b RDI: ffffc90000017780
RBP: ffffc900000176b8 R08: ffffc90000017790 R09: ffffc90000017788
R10: 0000000000000004 R11: ffffffff817457d0 R12: ffffc9000001778c
R13: 1ffff92000002ef1 R14: 0000000000000000 R15: 1ffff92000002ef1
FS:  00007fc20fc53c80(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f23515b5c98 CR3: 0000000109f74000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 arch_stack_walk+0x12a/0x170 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0x9d/0xe0 kernel/stacktrace.c:122
 save_stack+0xf8/0x1f0 mm/page_owner.c:174
 __reset_page_owner+0x79/0x450 mm/page_owner.c:315
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1352 [inline]
 free_unref_page+0xb4d/0xee0 mm/page_alloc.c:2842
 __free_pages+0x6b/0x3b0 mm/page_alloc.c:5351
 __free_slab+0xb6/0x110 mm/slub.c:2734
 free_slab+0x18/0xf0 mm/slub.c:2757
 discard_slab mm/slub.c:2763 [inline]
 __put_partials+0x11b/0x150 mm/slub.c:3232
 put_cpu_partial+0x91/0xc0 mm/slub.c:3307
 __slab_free+0x1d3/0x2b0 mm/slub.c:4560
 do_slab_free mm/slub.c:4642 [inline]
 ___cache_free+0xc9/0xe0 mm/slub.c:4753
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0xb5/0x130 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x180 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x28/0x90 mm/kasan/common.c:330
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4178 [inline]
 slab_alloc_node mm/slub.c:4227 [inline]
 kmem_cache_alloc_noprof+0x1cb/0x430 mm/slub.c:4236
 getname_flags+0xc6/0x710 fs/namei.c:139
 user_path_at+0x2b/0x60 fs/namei.c:3015
 do_faccessat+0x5a4/0xcb0 fs/open.c:494
 __do_sys_access fs/open.c:553 [inline]
 __se_sys_access fs/open.c:551 [inline]
 __x64_sys_access+0x65/0x80 fs/open.c:551
 x64_sys_call+0x2a94/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:22
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fc20fe0d2c7
Code: 0f 1f 00 8b 87 10 01 00 00 89 06 31 c0 c3 0f 1f 44 00 00 89 b7 10 01 00 00 31 c0 c3 0f 1f 80 00 00 00 00 b8 15 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 01 fb 0d 00 f7 d8 64 89 02 b8
RSP: 002b:00007ffcdf3e09c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007fc20feb10b7 RCX: 00007fc20fe0d2c7
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 00007fc20feb10b7
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000ead R15: 0000559675e97d98
 </TASK>
net_ratelimit: 101891 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:ca:bb:73:e1:83:1f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)