INFO: task syz.5.799:2624 blocked for more than 124 seconds.
Not tainted 6.12.30-syzkaller-g68f4f0b0690a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.799 state:R running task stack:0 pid:2624 tgid:2623 ppid:2324 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5924 [inline]
__schedule+0x145b/0x1f10 kernel/sched/core.c:7750
preempt_schedule_irq+0x9c/0x100 kernel/sched/core.c:8076
raw_irqentry_exit_cond_resched+0x33/0x40 kernel/entry/common.c:311
irqentry_exit+0x4a/0x60 kernel/entry/common.c:354
sysvec_reschedule_ipi+0x73/0x80 arch/x86/kernel/smp.c:248
asm_sysvec_reschedule_ipi+0x1f/0x30 arch/x86/include/asm/idtentry.h:707
RIP: 0010:qlink_to_object mm/kasan/quarantine.c:140 [inline]
RIP: 0010:qlink_free mm/kasan/quarantine.c:145 [inline]
RIP: 0010:qlist_free_all+0x8b/0x130 mm/kasan/quarantine.c:179
Code: 48 8b 4c 18 08 f6 c1 01 75 55 48 01 d8 0f b6 48 33 c1 e1 18 81 f9 00 00 00 f5 b9 00 00 00 00 48 0f 45 c1 4c 8b 60 08 4d 8b 2f <49> 63 84 24 ec 00 00 00 49 29 c7 4c 89 e7 4c 89 fe e8 8f e5 ff ff
RSP: 0018:ffffc9000e08f728 EFLAGS: 00000246
RAX: ffffea000571af40 RBX: ffffea0000000000 RCX: 0000000000000000
RDX: 00000000000c000b RSI: ffffea000571af40 RDI: 0000000000000000
RBP: ffffc9000e08f758 R08: ffff88815c6bddc0 R09: 00000000000c000a
R10: ffff88815c6bd500 R11: fffff52001c11ec0 R12: ffff888104e5b000
R13: ffff88815c6bdc80 R14: 0000000000000000 R15: ffff88815c6bda00
kasan_quarantine_reduce+0x14f/0x180 mm/kasan/quarantine.c:286
__kasan_kmalloc+0x28/0xb0 mm/kasan/common.c:385
kasan_kmalloc include/linux/kasan.h:260 [inline]
__kmalloc_cache_noprof+0x1a5/0x3c0 mm/slub.c:4378
kmalloc_noprof include/linux/slab.h:881 [inline]
kzalloc_noprof include/linux/slab.h:1017 [inline]
kobject_uevent_env+0x2a3/0x7e0 lib/kobject_uevent.c:540
kvm_uevent_notify_change+0x4f9/0x560 virt/kvm/kvm_main.c:6353
kvm_destroy_vm virt/kvm/kvm_main.c:1316 [inline]
kvm_put_kvm+0xa0/0x12b0 virt/kvm/kvm_main.c:1391
kvm_vm_release+0x47/0x70 virt/kvm/kvm_main.c:1414
__fput+0x1fe/0xa00 fs/file_table.c:431
____fput+0x20/0x30 fs/file_table.c:459
task_work_run+0x1e0/0x250 kernel/task_work.c:240
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0x9b4/0x2630 kernel/exit.c:944
do_group_exit+0x22a/0x300 kernel/exit.c:1094
get_signal+0x139d/0x14f0 kernel/signal.c:2934
arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f9a8b78e52b
RSP: 002b:00007f9a8c653f10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 000000000000000d RCX: 00007f9a8b78e52b
RDX: 00007f9a8c654fe0 RSI: 0000000080085502 RDI: 000000000000000d
RBP: 00007f9a8c654fe0 R08: 0000000000000080 R09: 00007f9a8c653fd8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000080085502
R13: 0000000800000000 R14: 0000000000000008 R15: 00007f9a8b81bc4f
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-g68f4f0b0690a #0 d2d57a621586a6800997b547ec5ef233d70fc6ad
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
__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:229 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:385
kthread+0x2ca/0x370 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 33 Comm: rcuop/1 Not tainted 6.12.30-syzkaller-g68f4f0b0690a #0 d2d57a621586a6800997b547ec5ef233d70fc6ad
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:58 [inline]
RIP: 0010:update_stack_state+0x1db/0x4b0 arch/x86/kernel/unwind_frame.c:228
Code: 04 28 84 c0 0f 85 8c 00 00 00 49 89 dc 44 8b 2b 45 85 ed 0f 95 c0 48 8b 55 b0 4c 39 fa 0f 93 c1 20 c1 4c 39 f2 0f 92 c0 20 c8 <3c> 01 75 17 48 8b 8d 78 ff ff ff 4c 39 f9 0f 97 c0 4c 39 f1 0f 96
RSP: 0018:ffffc900000070f8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc90000007248 RCX: 1ffff92000000e01
RDX: ffffc90000007690 RSI: 1ffff92000000e4a RDI: ffffc900000072a0
RBP: ffffc900000071b8 R08: ffffc90000007310 R09: ffffc90000007308
R10: 0000000000000004 R11: ffffffff817401a0 R12: ffffc90000007248
R13: 0000000000000002 R14: ffffc90000008000 R15: ffffc90000000000
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff1c97fc58 CR3: 000000010cf0c000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000097 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0x3c2/0x750 arch/x86/kernel/unwind_frame.c:315
arch_stack_walk+0x139/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9d/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:565
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x73/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4164 [inline]
slab_alloc_node mm/slub.c:4213 [inline]
kmem_cache_alloc_noprof+0x131/0x3a0 mm/slub.c:4222
skb_clone+0x229/0x460 net/core/skbuff.c:2094
deliver_clone net/bridge/br_forward.c:125 [inline]
maybe_deliver net/bridge/br_forward.c:190 [inline]
br_flood+0x4ed/0x730 net/bridge/br_forward.c:236
br_handle_frame_finish+0x12bb/0x1720 net/bridge/br_input.c:215
nf_hook_bridge_pre net/bridge/br_input.c:301 [inline]
br_handle_frame+0x5a6/0xba0 net/bridge/br_input.c:424
__netif_receive_skb_core+0xf48/0x3940 net/core/dev.c:5651
__netif_receive_skb_one_core net/core/dev.c:5755 [inline]
__netif_receive_skb net/core/dev.c:5870 [inline]
process_backlog+0x3e5/0xae0 net/core/dev.c:6202
__napi_poll+0xd3/0x610 net/core/dev.c:6853
napi_poll net/core/dev.c:6922 [inline]
net_rx_action+0x584/0xce0 net/core/dev.c:7044
handle_softirqs+0x1ae/0x630 kernel/softirq.c:603
__do_softirq+0xf/0x16 kernel/softirq.c:641
do_softirq+0xa6/0x100 kernel/softirq.c:485
__local_bh_enable_ip+0x74/0x80 kernel/softirq.c:412
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_do_batch+0x5c6/0xd20 kernel/rcu/tree.c:2586
nocb_cb_wait kernel/rcu/tree_nocb.h:923 [inline]
rcu_nocb_cb_kthread+0x4dc/0xac0 kernel/rcu/tree_nocb.h:957
kthread+0x2ca/0x370 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
net_ratelimit: 111602 callbacks suppressed
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 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 bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, 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 veth0_to_bridge with own address as source address (addr:3a:17:61:30:ee:77, 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)
net_ratelimit: 141327 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:3a:17:61:30:ee:77, 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 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 bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, 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 veth0_to_bridge with own address as source address (addr:3a:17:61:30:ee:77, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)