INFO: task syz-executor.0:5423 blocked for more than 143 seconds.
Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:23760 pid:5423 tgid:5423 ppid:1 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x120/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:812 [inline]
lookup_slow fs/namei.c:1710 [inline]
walk_component+0x33b/0x5a0 fs/namei.c:2002
link_path_walk.part.0.constprop.0+0x71f/0xce0 fs/namei.c:2329
link_path_walk fs/namei.c:2254 [inline]
path_openat+0x23f/0x2c50 fs/namei.c:3775
do_filp_open+0x1de/0x430 fs/namei.c:3809
do_sys_openat2+0x176/0x1e0 fs/open.c:1440
do_sys_open fs/open.c:1455 [inline]
__do_sys_openat fs/open.c:1471 [inline]
__se_sys_openat fs/open.c:1466 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1466
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f46250794d1
RSP: 002b:00007ffeb4f50130 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f46250794d1
RDX: 0000000000090800 RSI: 00007f46250d42e6 RDI: 00000000ffffff9c
RBP: 00007ffeb4f501fc R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 00000000000146af R14: 0000000000014369 R15: 0000000000000009
INFO: task syz-executor.0:5443 blocked for more than 143 seconds.
Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:25392 pid:5443 tgid:5442 ppid:5423 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
request_wait_answer+0x4f4/0x8f0 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x504/0xd20 fs/fuse/dev.c:513
fuse_lookup_name+0x1df/0x580 fs/fuse/dir.c:386
fuse_lookup+0x1ad/0x430 fs/fuse/dir.c:425
__lookup_slow+0x24d/0x450 fs/namei.c:1694
lookup_slow fs/namei.c:1711 [inline]
walk_component+0x349/0x5a0 fs/namei.c:2002
link_path_walk.part.0.constprop.0+0x71f/0xce0 fs/namei.c:2329
link_path_walk fs/namei.c:2254 [inline]
path_openat+0x23f/0x2c50 fs/namei.c:3775
do_filp_open+0x1de/0x430 fs/namei.c:3809
do_sys_openat2+0x176/0x1e0 fs/open.c:1440
do_sys_open fs/open.c:1455 [inline]
__do_sys_openat fs/open.c:1471 [inline]
__se_sys_openat fs/open.c:1466 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1466
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f4625079a29
RSP: 002b:00007f46261b30c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f462518bf80 RCX: 00007f4625079a29
RDX: 0000000000000042 RSI: 0000000020002080 RDI: ffffffffffffff9c
RBP: 00007f46250d5170 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f462518bf80 R15: 00007ffeb4f4fe58
INFO: task syz-executor.0:5444 blocked for more than 143 seconds.
Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27872 pid:5444 tgid:5442 ppid:5423 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
__down_write_common+0x948/0x1400 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:837 [inline]
fuse_reverse_inval_entry+0x59/0x580 fs/fuse/dir.c:1351
fuse_notify_delete fs/fuse/dev.c:1552 [inline]
fuse_notify fs/fuse/dev.c:1801 [inline]
fuse_dev_do_write+0xe94/0x2c90 fs/fuse/dev.c:1876
fuse_dev_write+0x155/0x1e0 fs/fuse/dev.c:1960
call_write_iter include/linux/fs.h:2020 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x64f/0xdf0 fs/read_write.c:584
ksys_write+0x12f/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f4625079a29
RSP: 002b:00007f46261920c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f462518c050 RCX: 00007f4625079a29
RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f46250d5170 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f462518c050 R15: 00007ffeb4f4fe58
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cfabce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8cfabce0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8cfabce0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/4822:
#0: ffff88801bca80a0 (&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+0xfc6/0x1490 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.0/5423:
#0: ffff888074460150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff888074460150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1710 [inline]
#0: ffff888074460150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x33b/0x5a0 fs/namei.c:2002
2 locks held by syz-executor.0/5443:
#0: ffff888074460150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff888074460150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1710 [inline]
#0: ffff888074460150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x33b/0x5a0 fs/namei.c:2002
#1: ffff8880744605c8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xd2/0x110 fs/fuse/inode.c:492
2 locks held by syz-executor.0/5444:
#0: ffff88801f177b38 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify_delete fs/fuse/dev.c:1551 [inline]
#0: ffff88801f177b38 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify fs/fuse/dev.c:1801 [inline]
#0: ffff88801f177b38 (&fc->killsb){.+.+}-{3:3}, at: fuse_dev_do_write+0xe74/0x2c90 fs/fuse/dev.c:1876
#1: ffff888074460150 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff888074460150 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: fuse_reverse_inval_entry+0x59/0x580 fs/fuse/dir.c:1351
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x390 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+0x2c6/0x3a0 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:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2821 Comm: kworker/u4:11 Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__prepare_ICR arch/x86/kernel/apic/local.h:38 [inline]
RIP: 0010:__default_send_IPI_dest_field+0x65/0xf0 arch/x86/kernel/apic/ipi.c:185
Code: ff fb ff ff f6 c4 10 74 19 f3 90 0f b6 03 84 c0 74 04 3c 03 7e 7c 8b 04 25 00 c3 5f ff f6 c4 10 75 e7 44 89 24 25 10 c3 5f ff <89> f0 09 e8 89 04 25 00 c3 5f ff 48 83 c4 08 5b 5d 41 5c c3 bb e8
RSP: 0018:ffffc9000aa078f0 EFLAGS: 00000046
RAX: 00000000000008fb RBX: fffffbffffebf860 RCX: ffffffff818e4a8b
RDX: 0000000000000800 RSI: 00000000000000fb RDI: 0000000002000000
RBP: 0000000000000800 R08: 0000000000000000 R09: fffffbfff1e326ca
R10: ffffffff8f193657 R11: 0000000000000006 R12: 0000000002000000
R13: ffffffff817be940 R14: 0000000000000001 R15: ffff8880b983d8c0
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055abe5095600 CR3: 000000000cd77000 CR4: 0000000000350ef0
Call Trace:
_flat_send_IPI_mask+0x40/0x70 arch/x86/kernel/apic/apic_flat_64.c:36
arch_send_call_function_single_ipi arch/x86/include/asm/smp.h:101 [inline]
send_call_function_single_ipi kernel/smp.c:117 [inline]
smp_call_function_many_cond+0x12cf/0x1550 kernel/smp.c:837
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1023
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2006 [inline]
text_poke_bp_batch+0x655/0x750 arch/x86/kernel/alternative.c:2216
text_poke_flush arch/x86/kernel/alternative.c:2407 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2404 [inline]
text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2414
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1d7/0x400 kernel/jump_label.c:829
static_key_disable_cpuslocked+0x154/0x1c0 kernel/jump_label.c:235
static_key_disable+0x1a/0x20 kernel/jump_label.c:243
toggle_allocation_gate mm/kfence/core.c:835 [inline]
toggle_allocation_gate+0x13f/0x250 mm/kfence/core.c:822
process_one_work+0x886/0x15d0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x2c6/0x3a0 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:242