INFO: task syz-executor.0:6140 blocked for more than 143 seconds.
Not tainted 6.14.0-rc1-next-20250207-syzkaller-02219-ged58d103e6da #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:20384 pid:6140 tgid:6140 ppid:1 task_flags:0x400140 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:887 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1804
walk_component fs/namei.c:2109 [inline]
link_path_walk+0x963/0xeb0 fs/namei.c:2474
path_openat+0x266/0x35b0 fs/namei.c:3980
do_filp_open+0x282/0x4e0 fs/namei.c:4011
do_sys_openat2+0x13f/0x1c0 fs/open.c:1428
do_sys_open fs/open.c:1443 [inline]
__do_sys_openat fs/open.c:1459 [inline]
__se_sys_openat fs/open.c:1454 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1454
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: 0033:0x7f5650c7c311
RSP: 002b:00007ffc3a41e040 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f5650c7c311
RDX: 0000000000090800 RSI: 00007f5650cd7b46 RDI: 00000000ffffff9c
RBP: 00007ffc3a41e10c R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 000000000001a1a1 R14: 0000000000019e59 R15: 0000000000000009
INFO: task syz-executor.0:6202 blocked for more than 143 seconds.
Not tainted 6.14.0-rc1-next-20250207-syzkaller-02219-ged58d103e6da #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:22784 pid:6202 tgid:6201 ppid:6140 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
request_wait_answer fs/fuse/dev.c:548 [inline]
__fuse_request_send fs/fuse/dev.c:562 [inline]
__fuse_simple_request+0xe6f/0x1890 fs/fuse/dev.c:656
fuse_simple_request fs/fuse/fuse_i.h:1224 [inline]
fuse_lookup_name+0x429/0x9d0 fs/fuse/dir.c:386
fuse_lookup+0x182/0x600 fs/fuse/dir.c:429
__lookup_slow+0x296/0x400 fs/namei.c:1788
lookup_slow+0x53/0x70 fs/namei.c:1805
walk_component fs/namei.c:2109 [inline]
link_path_walk+0x963/0xeb0 fs/namei.c:2474
path_openat+0x266/0x35b0 fs/namei.c:3980
do_filp_open+0x282/0x4e0 fs/namei.c:4011
do_sys_openat2+0x13f/0x1c0 fs/open.c:1428
do_sys_open fs/open.c:1443 [inline]
__do_sys_openat fs/open.c:1459 [inline]
__se_sys_openat fs/open.c:1454 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1454
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: 0033:0x7f5650c7b560
RSP: 002b:00007f5651945c00 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007f5650c7b560
RDX: 0000000000004000 RSI: 00007f5651945ca0 RDI: 00000000ffffff9c
RBP: 00007f5651945ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 000000000000000b R14: 00007f5650d9bf80 R15: 00007ffc3a41dd98
INFO: task syz-executor.0:6207 blocked for more than 143 seconds.
Not tainted 6.14.0-rc1-next-20250207-syzkaller-02219-ged58d103e6da #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:26392 pid:6207 tgid:6201 ppid:6140 task_flags:0x400040 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913
rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write_nested+0x1e0/0x220 kernel/locking/rwsem.c:1694
inode_lock_nested include/linux/fs.h:912 [inline]
fuse_reverse_inval_entry+0x62/0x720 fs/fuse/dir.c:1376
fuse_notify_delete fs/fuse/dev.c:1706 [inline]
fuse_notify fs/fuse/dev.c:2023 [inline]
fuse_dev_do_write+0x47b2/0x6480 fs/fuse/dev.c:2108
fuse_dev_write+0x148/0x1d0 fs/fuse/dev.c:2192
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0xacf/0xd10 fs/read_write.c:679
ksys_write+0x18f/0x2b0 fs/read_write.c:731
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: 0033:0x7f5650c7c859
RSP: 002b:00007f56519250c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f5650d9c050 RCX: 00007f5650c7c859
RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f5650cd8ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f5650d9c050 R15: 00007ffc3a41dd98
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e9389a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e9389a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e9389a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
1 lock held by klogd/5191:
#0: ffff8880b863e958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598
2 locks held by getty/5590:
#0: ffff888030f930a0 (&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
1 lock held by syz-executor.0/6140:
#0: ffff8880762b8148 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline]
#0: ffff8880762b8148 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1804
2 locks held by syz-executor.0/6202:
#0: ffff8880762b8148 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:887 [inline]
#0: ffff8880762b8148 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1804
#1: ffff8880762b8610 (&fi->mutex){+.+.}-{4:4}, at: fuse_lock_inode+0xd2/0x120 fs/fuse/inode.c:590
2 locks held by syz-executor.0/6207:
#0: ffff88807c7b5348 (&fc->killsb){.+.+}-{4:4}, at: fuse_notify_delete fs/fuse/dev.c:1705 [inline]
#0: ffff88807c7b5348 (&fc->killsb){.+.+}-{4:4}, at: fuse_notify fs/fuse/dev.c:2023 [inline]
#0: ffff88807c7b5348 (&fc->killsb){.+.+}-{4:4}, at: fuse_dev_do_write+0x4752/0x6480 fs/fuse/dev.c:2108
#1: ffff8880762b8148 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#1: ffff8880762b8148 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: fuse_reverse_inval_entry+0x62/0x720 fs/fuse/dir.c:1376
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc1-next-20250207-syzkaller-02219-ged58d103e6da #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111