INFO: task syz-executor.1:5556 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00296-g5eb4573ea63d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:23584 pid:5556 tgid:5556 ppid:1 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
bit_wait+0x15/0xe0 kernel/sched/wait_bit.c:199
__wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0xda/0x110 kernel/sched/wait_bit.c:64
wait_on_bit include/linux/wait_bit.h:76 [inline]
wait_on_bit include/linux/wait_bit.h:71 [inline]
gfs2_glock_wait+0xe7/0x330 fs/gfs2/glock.c:1354
gfs2_glock_nq+0x946/0x1cd0 fs/gfs2/glock.c:1616
gfs2_glock_nq_init fs/gfs2/glock.h:238 [inline]
__gfs2_lookup+0x111/0x290 fs/gfs2/inode.c:905
__lookup_slow+0x24f/0x460 fs/namei.c:1692
lookup_slow fs/namei.c:1709 [inline]
walk_component+0x350/0x5b0 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2485
filename_lookup+0x1e5/0x5b0 fs/namei.c:2514
user_path_at_empty+0x42/0x60 fs/namei.c:2921
user_path_at include/linux/namei.h:57 [inline]
ksys_umount fs/namespace.c:1916 [inline]
__do_sys_umount fs/namespace.c:1924 [inline]
__se_sys_umount fs/namespace.c:1922 [inline]
__x64_sys_umount+0x10e/0x1a0 fs/namespace.c:1922
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f40b3e7f1d7
RSP: 002b:00007ffc85f7f698 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007f40b3ec93b9 RCX: 00007f40b3e7f1d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc85f7f750
RBP: 00007ffc85f7f750 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc85f80840
R13: 00007f40b3ec93b9 R14: 000055555ce47430 R15: 0000000000000009
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4832:
#0: ffff88802edaa0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.1/5556:
#0: ffff88805e318808 (&type->i_mutex_dir_key#18){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88805e318808 (&type->i_mutex_dir_key#18){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff88805e318808 (&type->i_mutex_dir_key#18){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
3 locks held by kworker/u8:9/5722:
#0: ffff8880b953ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
#1: ffff8880b9528a08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x20c/0x900 kernel/sched/psi.c:976
#2: ffff8880b952a858 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5d/0x220 kernel/time/timer.c:1052
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00296-g5eb4573ea63d #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+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:380
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 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 PID: 5100 Comm: kworker/1:4 Not tainted 6.9.0-rc5-syzkaller-00296-g5eb4573ea63d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:unwind_next_frame+0x1b6e/0x23a0 arch/x86/kernel/unwind_orc.c:648
Code: c1 ee 03 0f b6 14 16 48 89 fe 83 e6 07 40 38 f1 40 0f 9e c6 84 c9 0f 95 c1 40 84 ce 0f 85 1f 08 00 00 83 e0 07 38 c2 0f 9e c1 <84> d2 0f 95 c0 84 c1 0f 85 0a 08 00 00 4d 0f bf 64 24 02 ba 08 00
RSP: 0018:ffffc900032d76a8 EFLAGS: 00000297
RAX: 0000000000000001 RBX: ffffc900032d7728 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff902ad7a0
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000004
R10: 0000000000000001 R11: 0000000000000004 R12: ffffffff902ad79e
R13: ffffc900032d7f58 R14: 0000000000000001 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557bc4f5e0f0 CR3: 000000000d57a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slub.c:3966 [inline]
__kmalloc_node_track_caller+0x220/0x470 mm/slub.c:3986
kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:599
__alloc_skb+0x164/0x380 net/core/skbuff.c:668
alloc_skb include/linux/skbuff.h:1313 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x2a4/0xc80 drivers/net/netdevsim/dev.c:850
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244