INFO: task syz-executor.0:5484 blocked for more than 143 seconds.
Not tainted 6.7.0-next-20240112-syzkaller-13343-g8d04a7e2ee3f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28800 pid:5484 tgid:5477 ppid:5417 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf15/0x5ce0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe7/0x280 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
__down_write_common+0x950/0x13f0 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+0xe98/0x2c90 fs/fuse/dev.c:1876
fuse_dev_write+0x155/0x1e0 fs/fuse/dev.c:1960
call_write_iter include/linux/fs.h:2085 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0x6db/0x1100 fs/read_write.c:590
ksys_write+0x12f/0x260 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fc213e7ad39
RSP: 002b:00007fc214fd20c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc213f9c050 RCX: 00007fc213e7ad39
RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007fc213ed7567 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fc213f9c050 R15: 00007ffec8405158
Showing all locks held in the system:
3 locks held by kworker/u4:1/12:
#0: ffff8880b953ccd8 (&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+0x2d9/0x900 kernel/sched/psi.c:988
#2: ffff8880b9529958 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5d/0x200 kernel/time/timer.c:999
1 lock held by khungtaskd/29:
#0: ffffffff8d7aeca0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d7aeca0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d7aeca0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4817:
#0: ffff88802bada0a0 (&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+0xfc8/0x1490 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.0/5417:
#0: ffff888076918150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff888076918150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1709 [inline]
#0: ffff888076918150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2001
2 locks held by syz-executor.0/5478:
#0: ffff888076918150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff888076918150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1709 [inline]
#0: ffff888076918150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2001
#1: ffff8880769185c8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xd2/0x110 fs/fuse/inode.c:544
2 locks held by syz-executor.0/5484:
#0: ffff88802c2f8338 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify_delete fs/fuse/dev.c:1551 [inline]
#0: ffff88802c2f8338 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify fs/fuse/dev.c:1801 [inline]
#0: ffff88802c2f8338 (&fc->killsb){.+.+}-{3:3}, at: fuse_dev_do_write+0xe78/0x2c90 fs/fuse/dev.c:1876
#1: ffff888076918150 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff888076918150 (&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 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.7.0-next-20240112-syzkaller-13343-g8d04a7e2ee3f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
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:222 [inline]
watchdog+0xf86/0x1210 kernel/hung_task.c:379
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:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4493 Comm: syslogd Not tainted 6.7.0-next-20240112-syzkaller-13343-g8d04a7e2ee3f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:unwind_next_frame+0x11a2/0x2390 arch/x86/kernel/unwind_orc.c:665
Code: e8 a3 00 50 00 41 39 ec 0f 85 b1 00 00 00 e8 75 06 50 00 48 8b 54 24 10 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 b5 11 00 00 48 8d 7b 08 48 8b 6b 38 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc9000331f548 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc9000331f5c8 RCX: ffffffff813c16cd
RDX: 1ffff92000663ec0 RSI: ffffffff813c16db RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000000000004 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000001
FS: 00007f8640aed380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555ce742c680 CR3: 000000007bfdc000 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
kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:640
poison_slab_object mm/kasan/common.c:241 [inline]
__kasan_slab_free+0x121/0x1c0 mm/kasan/common.c:257
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2121 [inline]
slab_free mm/slub.c:4299 [inline]
kmem_cache_free+0x12e/0x360 mm/slub.c:4363
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:1051
__kfree_skb net/core/skbuff.c:1109 [inline]
consume_skb net/core/skbuff.c:1324 [inline]
consume_skb+0xdf/0x170 net/core/skbuff.c:1318
__unix_dgram_recvmsg+0x814/0xef0 net/unix/af_unix.c:2468
unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2485
sock_recvmsg_nosec net/socket.c:1046 [inline]
sock_recvmsg+0x1f6/0x250 net/socket.c:1068
sock_read_iter+0x2c7/0x3c0 net/socket.c:1138
call_read_iter include/linux/fs.h:2079 [inline]
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0x9fd/0xb80 fs/read_write.c:476
ksys_read+0x1f8/0x260 fs/read_write.c:619
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f8640c41b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff473f6968 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f8640c41b6a
RDX: 00000000000000ff RSI: 000055b76967d950 RDI: 0000000000000000
RBP: 000055b76967d910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007f8640de03a3 R11: 0000000000000246 R12: 000055b76967d99c
R13: 000055b76967d950 R14: 0000000000000000 R15: 00007f8640e1ea80