INFO: task syz.6.2741:19318 blocked for more than 143 seconds.
Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.2741 state:D stack:23840 pid:19318 tgid:19318 ppid:16560 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x1850/0x4c30 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_timeout+0xb0/0x290 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
vhost_task_stop+0xc1/0xe0 kernel/vhost_task.c:102
kvm_destroy_vm virt/kvm/kvm_main.c:1271 [inline]
kvm_put_kvm+0x372/0xf60 virt/kvm/kvm_main.c:1340
kvm_vm_release+0x43/0x50 virt/kvm/kvm_main.c:1363
__fput+0x23c/0xa50 fs/file_table.c:450
task_work_run+0x24f/0x310 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2d1f77e819
RSP: 002b:00007f2d1fa5fb88 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f2d1f937ba0 RCX: 00007f2d1f77e819
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f2d1f937ba0 R08: 0000000000000174 R09: 00007f2d1fa5fe7f
R10: 00007f2d1f937ac0 R11: 0000000000000246 R12: 00000000000a1ab7
R13: 00007f2d1fa5fc90 R14: 0000000000000032 R15: ffffffffffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e93c520 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
3 locks held by kworker/u8:9/3566:
2 locks held by getty/5604:
#0: ffff8880351da0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
6 locks held by kworker/1:7/14075:
#0: ffff8880206a4148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff8880206a4148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc9000355fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000355fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffff8881453fb190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#2: ffff8881453fb190 (&dev->mutex){....}-{4:4}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849
#3: ffff8880568bb190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#3: ffff8880568bb190 (&dev->mutex){....}-{4:4}, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1005
#4: ffff888062c2f160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#4: ffff888062c2f160 (&dev->mutex){....}-{4:4}, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1005
#5: ffff888033124e60 (&dev->phy_mutex){+.+.}-{4:4}, at: mcs7830_write_phy+0xe3/0x390 drivers/net/usb/mcs7830.c:227
4 locks held by udevd/18489:
#0: ffff888021ac42f0 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xb4/0xd70 fs/seq_file.c:182
#1: ffff88802894fc88 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2: ffff8880668a31e8 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3: ffff888062c2f160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#3: ffff888062c2f160 (&dev->mutex){....}-{4:4}, at: uevent_show+0x17d/0x340 drivers/base/core.c:2736
2 locks held by syz.0.3591/23455:
#0: ffff88807278b808 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
#0: ffff88807278b808 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: __sock_release net/socket.c:639 [inline]
#0: ffff88807278b808 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: sock_close+0x90/0x240 net/socket.c:1408
#1: ffffffff8e941ab8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#1: ffffffff8e941ab8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
4 locks held by dhcpcd/23503:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xffb/0x1040 kernel/hung_task.c:397
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
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: 23503 Comm: dhcpcd-run-hook Not tainted 6.12.0-syzkaller-09435-g2c22dc1ee3a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__inline_bsearch include/linux/bsearch.h:20 [inline]
RIP: 0010:poke_int3_handler+0x18b/0x1d0 arch/x86/kernel/alternative.c:2209
Code: c9 81 fe cc 00 00 00 74 a6 90 0f 0b 49 89 c1 48 89 f1 48 83 e1 fe 49 8d 04 c9 49 63 0c c9 48 8d 89 00 00 00 81 4c 39 c1 74 28 <48> 83 c0 10 4c 39 c1 48 83 de 00 4c 39 c1 4c 0f 42 c8 48 89 f0 48
RSP: 0018:ffffc900149dfab8 EFLAGS: 00000087
RAX: ffffffff93212ca0 RBX: ffffc900149dfad8 RCX: ffffffff81f49a04
RDX: ffffffff81f4a334 RSI: 0000000000000009 RDI: ffffc900149dfad8
RBP: 0000000000000000 R08: ffffffff81f4a333 R09: ffffffff93212c60
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555c87250a18 CR3: 0000000033902000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
exc_int3+0xe/0x80 arch/x86/kernel/traps.c:791
asm_exc_int3+0x39/0x40 arch/x86/include/asm/idtentry.h:622
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline]
RIP: 0010:kfence_alloc include/linux/kfence.h:121 [inline]
RIP: 0010:slab_alloc_node mm/slub.c:4137 [inline]
RIP: 0010:__kmalloc_cache_noprof+0x84/0x390 mm/slub.c:4309
Code: 00 00 e8 cf fa 70 ff 2e 2e 2e 31 c0 4c 89 f7 89 de e8 60 ad 0c 00 31 db 4d 85 f6 0f 84 97 01 00 00 85 c0 0f 85 8f 01 00 00 cc <1f> 44 00 00 48 c7 44 24 08 00 00 00 00 41 b8 ff ff ff ff 65 48 8b
RSP: 0018:ffffc900149dfbb8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000020 RDI: ffffffff8ea5a440
RBP: 0000000000000018 R08: ffffffff8143b23c R09: 1ffffffff203c70e
R10: dffffc0000000000 R11: fffffbfff203c70f R12: ffffea0001e93900
R13: ffff88807a4e5880 R14: ffff88801ac41780 R15: 0000000000002800
kmalloc_noprof include/linux/slab.h:901 [inline]
slab_free_hook mm/slub.c:2290 [inline]
slab_free mm/slub.c:4598 [inline]
kmem_cache_free+0x16c/0x410 mm/slub.c:4700
task_work_run+0x24f/0x310 kernel/task_work.c:239
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0xa2f/0x28e0 kernel/exit.c:938
do_group_exit+0x207/0x2c0 kernel/exit.c:1087
__do_sys_exit_group kernel/exit.c:1098 [inline]
__se_sys_exit_group kernel/exit.c:1096 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f33dfcbfa90
Code: Unable to access opcode bytes at 0x7f33dfcbfa66.
RSP: 002b:00007ffda053a848 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000555c8723a910 RCX: 00007f33dfcbfa90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00007ffda053ab78 R08: 0000555c8723ac58 R09: 00e654f0b8d0e5ba
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffda053ab70
R13: 00007ffda053ab80 R14: 0000555c69381169 R15: 00007f33dfebca80