INFO: task syz-executor.1:5229 blocked for more than 143 seconds.
Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26520 pid:5229 tgid:5223 ppid:5082 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x17d3/0x4a20 kernel/sched/core.c:6736
__schedule_loop kernel/sched/core.c:6813 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6828
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
bdev_release+0x1cb/0xa20 block/bdev.c:1028
blkdev_release+0x15/0x20 block/fops.c:628
__fput+0x42b/0x8a0 fs/file_table.c:422
task_work_run+0x251/0x310 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:108 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0x168/0x360 kernel/entry/common.c:212
do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7ff40e07dda9
RSP: 002b:00007ff40d3de0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007ff40e1ac050 RCX: 00007ff40e07dda9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007ff40e0ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007ff40e1ac050 R15: 00007ffe5b3d9cb8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u8:3/50:
#0: ffff8880b953e358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffffffff94725cb8 (&obj_hash[i].lock){-.-.}-{2:2}, at: process_one_work kernel/workqueue.c:3230 [inline]
#1: ffffffff94725cb8 (&obj_hash[i].lock){-.-.}-{2:2}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335
2 locks held by getty/4822:
#0: ffff88802ab950a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by udevd/5144:
#0: ffff88801fe264c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862
1 lock held by syz-executor.1/5229:
#0: ffff88801fe264c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x1cb/0xa20 block/bdev.c:1028
1 lock held by syz-executor.1/8617:
#0: ffff88801fe264c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xdc/0xc90 block/bdev.c:862
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfb0/0xff0 kernel/hung_task.c:379
kthread+0x2f2/0x390 kernel/kthread.c:388
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5170 Comm: kworker/1:7 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:srso_safe_ret+0x0/0x20 arch/x86/lib/retpoline.S:208
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 b8 <48> 8d 64 24 08 c3 cc cc 0f ae e8 e8 f0 ff ff ff 0f 0b 66 2e 0f 1f
RSP: 0018:ffffc90004a774d8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc90004a70000
RDX: ffff888027c49e00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 1ffff9200094eeba R08: ffffffff8140a00d R09: ffffffff81409f66
R10: 0000000000000003 R11: ffff888027c49e00 R12: ffffc90004a77dc8
R13: ffffc90004a78000 R14: 1ffff9200094eeb9 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f374a57c038 CR3: 000000000df32000 CR4: 0000000000350ef0
Call Trace:
srso_return_thunk+0x5/0x5f arch/x86/lib/retpoline.S:222
on_stack arch/x86/include/asm/stacktrace.h:58 [inline]
stack_access_ok arch/x86/kernel/unwind_orc.c:393 [inline]
deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline]
unwind_next_frame+0x109d/0x2a00 arch/x86/kernel/unwind_orc.c:585
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2106 [inline]
slab_free mm/slub.c:4280 [inline]
kfree+0x14a/0x380 mm/slub.c:4390
skb_kfree_head net/core/skbuff.c:1096 [inline]
skb_free_head net/core/skbuff.c:1108 [inline]
skb_release_data+0x585/0x870 net/core/skbuff.c:1136
skb_release_all net/core/skbuff.c:1202 [inline]
__kfree_skb net/core/skbuff.c:1216 [inline]
consume_skb+0xb3/0x160 net/core/skbuff.c:1432
nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline]
nsim_dev_trap_report_work+0x765/0xaa0 drivers/net/netdevsim/dev.c:850
process_one_work kernel/workqueue.c:3254 [inline]
process_scheduled_works+0xa02/0x1770 kernel/workqueue.c:3335
worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
kthread+0x2f2/0x390 kernel/kthread.c:388
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243