INFO: task syz-executor.1:5065 blocked for more than 143 seconds.
Not tainted 6.6.0-rc7-syzkaller-00012-ge017769f4ce2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:24304 pid:5065 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x5a10 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
schedule_timeout+0x278/0x2c0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e0/0x5f0 kernel/sched/completion.c:116
__flush_work+0x523/0xa10 kernel/workqueue.c:3407
nilfs_segctor_destroy fs/nilfs2/segment.c:2766 [inline]
nilfs_detach_log_writer+0x39a/0xa80 fs/nilfs2/segment.c:2850
nilfs_put_super+0x43/0x1b0 fs/nilfs2/super.c:499
generic_shutdown_super+0x161/0x3c0 fs/super.c:693
kill_block_super+0x3b/0x70 fs/super.c:1646
deactivate_locked_super+0x9a/0x170 fs/super.c:481
deactivate_super+0xde/0x100 fs/super.c:514
cleanup_mnt+0x222/0x3d0 fs/namespace.c:1254
task_work_run+0x14d/0x240 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x215/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fec1367de17
RSP: 002b:00007ffcfdf811b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fec1367de17
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffcfdf81270
RBP: 00007ffcfdf81270 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcfdf82330
R13: 00007fec136c73b9 R14: 0000000000220694 R15: 000000000000000b
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cbab2e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff8cbab2e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff8cbab2e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by klogd/4475:
2 locks held by getty/4784:
#0: ffff8880264910a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
1 lock held by syz-executor.1/5065:
#0: ffff88803ce120e0 (&type->s_umount_key#84){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88803ce120e0 (&type->s_umount_key#84){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88803ce120e0 (&type->s_umount_key#84){++++}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:513
3 locks held by kworker/0:4/11624:
#0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc90015fc7d80 ((work_completion)(&sci->sc_iput_work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff88803ce12600 (sb_internal#3){.+.+}-{0:0}, at: nilfs_evict_inode+0x157/0x550 fs/nilfs2/inode.c:929
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc7-syzkaller-00012-ge017769f4ce2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 18236 Comm: kworker/1:1 Not tainted 6.6.0-rc7-syzkaller-00012-ge017769f4ce2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:write_comp_data+0x15/0x90 kernel/kcov.c:230
Code: bc 03 00 48 8b 80 f8 15 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 65 8b 05 71 e8 7b 7e 49 89 f1 89 c6 49 89 d2 81 e6 00 01 00 00 <49> 89 f8 65 48 8b 14 25 c0 bc 03 00 a9 00 01 ff 00 74 0e 85 f6 74
RSP: 0018:ffffc900039ff6d8 EFLAGS: 00000246
RAX: 0000000080000002 RBX: 0000000000000001 RCX: ffffffff813a5ce5
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffffff8a89d0e0 R08: 0000000000000001 R09: 0000000000000002
R10: 0000000000000004 R11: d0746c9d43060dcb R12: 0000000000000004
R13: 0000000000000001 R14: 0000000000000008 R15: ffffc900039ff7c5
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005630307db518 CR3: 000000000c976000 CR4: 0000000000350ee0
Call Trace:
__sanitizer_cov_trace_switch+0x54/0x90 kernel/kcov.c:341
unwind_next_frame+0x6b5/0x2390 arch/x86/kernel/unwind_orc.c:515
arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
slab_free mm/slub.c:3809 [inline]
kmem_cache_free+0xf0/0x480 mm/slub.c:3831
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1010
__kfree_skb net/core/skbuff.c:1068 [inline]
consume_skb net/core/skbuff.c:1283 [inline]
consume_skb+0xdf/0x170 net/core/skbuff.c:1277
nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline]
nsim_dev_trap_report_work+0x872/0xc70 drivers/net/netdevsim/dev.c:850
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304