INFO: task syz.0.2530:6385 blocked for more than 122 seconds.
Not tainted 6.12.30-syzkaller-ga76eb2b67bde #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.2530 state:D stack:0 pid:6385 tgid:6384 ppid:5850 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5947 [inline]
__schedule+0x132b/0x1e00 kernel/sched/core.c:7775
__schedule_loop kernel/sched/core.c:7856 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7871
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:4642
kvm_mmu_uninit_tdp_mmu+0x1df/0x210 arch/x86/kvm/mmu/tdp_mmu.c:51
kvm_mmu_uninit_vm+0x27/0x60 arch/x86/kvm/mmu/mmu.c:6572
kvm_arch_destroy_vm+0x383/0x410 arch/x86/kvm/x86.c:12898
kvm_destroy_vm virt/kvm/kvm_main.c:1355 [inline]
kvm_put_kvm+0xb04/0x12b0 virt/kvm/kvm_main.c:1391
kvm_vm_release+0x47/0x70 virt/kvm/kvm_main.c:1414
__fput+0x1fb/0xa00 fs/file_table.c:431
____fput+0x20/0x30 fs/file_table.c:459
task_work_run+0x1e3/0x250 kernel/task_work.c:240
get_signal+0x1307/0x14f0 kernel/signal.c:2707
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: 0033:0x7f70c458e929
RSP: 002b:00007f70c532a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f70c47b5fa0 RCX: 00007f70c458e929
RDX: 0000200000000400 RSI: 000000004020ae46 RDI: 0000000000000004
RBP: 00007f70c4610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f70c47b5fa0 R15: 00007fff5c77de28
INFO: task syz.2.2538:6402 blocked for more than 123 seconds.
Not tainted 6.12.30-syzkaller-ga76eb2b67bde #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.2538 state:D stack:0 pid:6402 tgid:6402 ppid:6192 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5947 [inline]
__schedule+0x132b/0x1e00 kernel/sched/core.c:7775
__schedule_loop kernel/sched/core.c:7856 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7871
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7928
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x81e/0x1b50 kernel/locking/mutex.c:788
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1119
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:270
rcu_barrier+0x4d/0x530 kernel/rcu/tree.c:4574
netdev_run_todo+0x10e/0xcb0 net/core/dev.c:10864
rtnl_unlock+0x12/0x20 net/core/rtnetlink.c:152
tun_detach drivers/net/tun.c:704 [inline]
tun_chr_close+0xc5/0x150 drivers/net/tun.c:3517
__fput+0x1fb/0xa00 fs/file_table.c:431
____fput+0x20/0x30 fs/file_table.c:459
task_work_run+0x1e3/0x250 kernel/task_work.c:240
resume_user_mode_work+0x36/0x50 include/linux/resume_user_mode.h:50
exit_to_user_mode_loop kernel/entry/common.c:114 [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+0x64/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7ff9d038e929
RSP: 002b:00007ffea822bf08 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00000000000207d5 RCX: 00007ff9d038e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007ff9d05b7ba0 R08: 0000000000000001 R09: 00000008a822c1ff
R10: 00007ff9d0200000 R11: 0000000000000246 R12: 00007ff9d05b5fac
R13: 00007ff9d05b5fa0 R14: ffffffffffffffff R15: 00007ffea822c020
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-ga76eb2b67bde #0 8824182ce8c593946fea7a5d8bf7bacf32ac00e2
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+0x2c7/0x370 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 98 Comm: klogd Not tainted 6.12.30-syzkaller-ga76eb2b67bde #0 8824182ce8c593946fea7a5d8bf7bacf32ac00e2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__list_del_entry_valid_or_report+0x8f/0x140 lib/list_debug.c:62
Code: 39 d6 74 7f 48 83 c2 22 49 39 d7 0f 84 83 00 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 64 2e 2e ff 49 8b 17 <48> 39 da 75 76 4d 8d 7e 08 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74
RSP: 0018:ffffc90000e1f350 EFLAGS: 00000046
RAX: 1ffffd4000a64391 RBX: ffffea0005321cc8 RCX: 0000000000002910
RDX: ffffea0005321cc8 RSI: ffffffff87c24f10 RDI: ffffea0005321cd0
RBP: ffffc90000e1f370 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff0e41a69 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff8881f6f720a0 R15: ffffea0005321c88
FS: 00007f835a5e3c80(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055dcee573b90 CR3: 000000010bf5a000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__list_del_entry_valid include/linux/list.h:124 [inline]
__list_del_entry include/linux/list.h:215 [inline]
list_del include/linux/list.h:229 [inline]
free_pcppages_bulk+0x273/0x550 mm/page_alloc.c:1414
free_unref_page_commit+0x5c5/0xf40 mm/page_alloc.c:2784
free_unref_page+0x516/0xdd0 mm/page_alloc.c:2840
__free_pages+0x6b/0x3b0 mm/page_alloc.c:5273
__free_slab+0xb6/0x110 mm/slub.c:2726
free_slab+0x18/0xf0 mm/slub.c:2749
discard_slab mm/slub.c:2755 [inline]
__put_partials+0x11b/0x150 mm/slub.c:3224
put_cpu_partial+0x91/0xc0 mm/slub.c:3299
__slab_free+0x1d3/0x2b0 mm/slub.c:4532
do_slab_free mm/slub.c:4614 [inline]
___cache_free+0xc9/0xe0 mm/slub.c:4725
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:329
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]
__do_kmalloc_node mm/slub.c:4346 [inline]
__kmalloc_node_track_caller_noprof+0x154/0x440 mm/slub.c:4366
kmalloc_reserve+0x144/0x500 net/core/skbuff.c:618
__alloc_skb+0x144/0x370 net/core/skbuff.c:687
alloc_skb include/linux/skbuff.h:1331 [inline]
alloc_skb_with_frags+0xce/0x8b0 net/core/skbuff.c:6622
sock_alloc_send_pskb+0x858/0x990 net/core/sock.c:2902
unix_dgram_sendmsg+0x59a/0x1b70 net/unix/af_unix.c:2027
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
__sys_sendto+0x66a/0x6f0 net/socket.c:2217
__do_sys_sendto net/socket.c:2229 [inline]
__se_sys_sendto net/socket.c:2225 [inline]
__x64_sys_sendto+0xe9/0x100 net/socket.c:2225
x64_sys_call+0x2c2c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:45
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: 0033:0x7f835a733407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffd29e34ba0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f835a5e3c80 RCX: 00007f835a733407
RDX: 0000000000000062 RSI: 00007ffd29e34ce0 RDI: 0000000000000003
RBP: 00007ffd29e35110 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000202 R12: 00007ffd29e35128
R13: 00007ffd29e34ce0 R14: 0000000000000047 R15: 00007ffd29e34ce0
net_ratelimit: 117194 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 veth0_to_bridge with own address as source address (addr:46:78:a7:50:45:74, 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:46:78:a7:50:45:74, 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:46:78:a7:50:45:74, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)