INFO: task syz-executor.2:12653 blocked for more than 143 seconds.
Not tainted 6.6.0-rc7-syzkaller-00137-g750b95887e56 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28168 pid:12653 ppid:5063 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x196c/0x4af0 kernel/sched/core.c:6695
schedule+0xc3/0x180 kernel/sched/core.c:6771
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830
rwsem_down_write_slowpath+0xee6/0x13a0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
inode_lock include/linux/fs.h:802 [inline]
f2fs_ioc_commit_atomic_write fs/f2fs/file.c:2172 [inline]
__f2fs_ioctl+0x35a0/0xb9b0 fs/f2fs/file.c:4224
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl+0xf8/0x170 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb65e87cae9
RSP: 002b:00007fb65f5ea0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb65e99c120 RCX: 00007fb65e87cae9
RDX: 0000000000008301 RSI: 000000000000f502 RDI: 0000000000000005
RBP: 00007fb65e8c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fb65e99c120 R15: 00007ffdf91feb78
Showing all locks held in the system:
4 locks held by kworker/u4:1/12:
#0: ffff888018a65538 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
#0: ffff888018a65538 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703
#1: ffffc90000117d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
#1: ffffc90000117d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703
#2: ffff88801d5200e0 (&type->s_umount_key#72){++++}-{3:3}, at: super_trylock_shared+0x22/0xf0 fs/super.c:607
#3: ffff88807ef212a8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2132 [inline]
#3: ffff88807ef212a8 (&sbi->gc_lock){+.+.}-{3:3}, at: f2fs_balance_fs+0x500/0x730 fs/f2fs/segment.c:437
1 lock held by khungtaskd/29:
#0: ffffffff8d32c460 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff8d32c460 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff8d32c460 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613
2 locks held by kworker/u4:6/1076:
2 locks held by udevd/4483:
2 locks held by getty/4788:
#0: ffff88814a9b60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1dc0 drivers/tty/n_tty.c:2206
1 lock held by syz-executor.1/5065:
#0: ffffffff8d331df8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#0: ffffffff8d331df8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:992
2 locks held by kworker/0:6/5133:
#0: ffff888012872938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
#0: ffff888012872938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703
#1: ffffc900049e7d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
#1: ffffc900049e7d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703
6 locks held by syz-executor.2/12652:
2 locks held by syz-executor.2/12653:
#0: ffff88801d520410 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write_file+0x61/0x200 fs/namespace.c:447
#1: ffff8880766559c0 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#1: ffff8880766559c0 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: f2fs_ioc_commit_atomic_write fs/f2fs/file.c:2172 [inline]
#1: ffff8880766559c0 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: __f2fs_ioctl+0x35a0/0xb9b0 fs/f2fs/file.c:4224
2 locks held by syz-executor.3/14612:
2 locks held by syz-executor.2/14626:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc7-syzkaller-00137-g750b95887e56 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 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+0xfa9/0xff0 kernel/hung_task.c:379
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 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: 4465 Comm: syslogd Not tainted 6.6.0-rc7-syzkaller-00137-g750b95887e56 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x60 kernel/kcov.c:206
Code: 00 00 f3 0f 1e fa 53 48 89 fb e8 13 00 00 00 48 8b 3d 44 50 0b 0d 48 89 de 5b e9 13 d3 59 00 0f 1f 00 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d 50 9b 75 7e 65 8b 15 51 9b 75 7e f7 c2 00 01 ff 00 74
RSP: 0018:ffffc9000313f7f8 EFLAGS: 00000206
RAX: ffffffff88ab29a6 RBX: 0000000000001e02 RCX: ffffffff88ab2951
RDX: ffff88807f159dc0 RSI: 0000000000001e03 RDI: 00000000ffffffff
RBP: 0000000000001e03 R08: ffffffff88ab2999 R09: 1ffff1100feb894e
R10: dffffc0000000000 R11: ffffed100feb894f R12: ffff88807f5c4a74
R13: 00000000000002ff R14: 0000000000000001 R15: ffff88807f5c4800
FS: 00007f4b6fec4380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556277978 CR3: 0000000028fd4000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__refcount_sub_and_test include/linux/refcount.h:282 [inline]
refcount_sub_and_test include/linux/refcount.h:310 [inline]
sock_wfree+0x226/0x620 net/core/sock.c:2499
unix_destruct_scm+0x2e7/0x350 net/unix/scm.c:153
skb_release_head_state+0xfd/0x240 net/core/skbuff.c:1039
skb_release_all net/core/skbuff.c:1051 [inline]
__kfree_skb net/core/skbuff.c:1067 [inline]
consume_skb+0x7b/0x150 net/core/skbuff.c:1283
__unix_dgram_recvmsg+0xcb7/0x1260 net/unix/af_unix.c:2442
sock_recvmsg_nosec net/socket.c:1044 [inline]
sock_recvmsg net/socket.c:1066 [inline]
sock_read_iter+0x3ab/0x500 net/socket.c:1136
call_read_iter include/linux/fs.h:1950 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x795/0xb00 fs/read_write.c:470
ksys_read+0x1a0/0x2c0 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4b70018b6a
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:00007fffb87ce9a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f4b70018b6a
RDX: 00000000000000ff RSI: 000056472e6dd950 RDI: 0000000000000000
RBP: 000056472e6dd910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007f4b701b73a3 R11: 0000000000000246 R12: 000056472e6dd9d8
R13: 000056472e6dd950 R14: 0000000000000000 R15: 00007f4b701f5a80