INFO: task syz-executor.1:10503 blocked for more than 143 seconds.
Not tainted 6.3.0-syzkaller-12728-g348551ddaf31 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:24536 pid:10503 ppid:8751 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x187b/0x4900 kernel/sched/core.c:6669
schedule+0xc3/0x180 kernel/sched/core.c:6745
io_schedule+0x8c/0x100 kernel/sched/core.c:8979
bit_wait_io+0x12/0xc0 kernel/sched/wait_bit.c:209
__wait_on_bit_lock+0xbd/0x1a0 kernel/sched/wait_bit.c:90
out_of_line_wait_on_bit_lock+0x1d4/0x250 kernel/sched/wait_bit.c:117
wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
__lock_buffer fs/buffer.c:70 [inline]
lock_buffer include/linux/buffer_head.h:406 [inline]
__sync_dirty_buffer+0x120/0x380 fs/buffer.c:2807
__ext4_handle_dirty_metadata+0x2a6/0x820 fs/ext4/ext4_jbd2.c:387
ext4_convert_inline_data_nolock+0xaba/0xd80 fs/ext4/inline.c:1252
ext4_convert_inline_data+0x4da/0x620 fs/ext4/inline.c:2063
ext4_fallocate+0x14e/0x2000 fs/ext4/extents.c:4708
vfs_fallocate+0x54b/0x6b0 fs/open.c:324
ksys_fallocate fs/open.c:347 [inline]
__do_sys_fallocate fs/open.c:355 [inline]
__se_sys_fallocate fs/open.c:353 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:353
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: 0033:0x7ffb6e48c169
RSP: 002b:00007ffb64c3e168 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007ffb6e5ac050 RCX: 00007ffb6e48c169
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000009
RBP: 00007ffb6e4e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000280404 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe12e2611f R14: 00007ffb64c3e300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8cf277b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8cf27b70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
#0: ffffffff8cf275e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
4 locks held by kworker/u4:3/46:
#0: ffff8880b983c1d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
#1: ffff8880b98287c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:996
#2: ffff8880b98295d8 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x692/0xf40 kernel/time/timer.c:1112
#3: ffff888033c23758 (&xfs_nondir_ilock_class#3){++++}-{3:3}, at: xfs_dquot_disk_alloc+0x389/0xdb0 fs/xfs/xfs_dquot.c:308
2 locks held by getty/4753:
#0: ffff88814ada3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2176
2 locks held by kworker/1:6/5092:
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378
#1: ffffc9000488fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380
3 locks held by syz-executor.1/10503:
#0: ffff88802bdca460 (sb_writers#4){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2522 [inline]
#0: ffff88802bdca460 (sb_writers#4){.+.+}-{0:0}, at: vfs_fallocate+0x4be/0x6b0 fs/open.c:323
#1: ffff88803844e800 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline]
#1: ffff88803844e800 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: ext4_fallocate+0x146/0x2000 fs/ext4/extents.c:4707
#2: ffff88803844e4c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff88803844e4c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x3b6/0x620 fs/ext4/inline.c:2061
1 lock held by udevd/10602:
1 lock held by syz-executor.0/12814:
1 lock held by syz-executor.3/12824:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.3.0-syzkaller-12728-g348551ddaf31 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
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+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x2b8/0x350 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4447 Comm: udevd Not tainted 6.3.0-syzkaller-12728-g348551ddaf31 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x60 kernel/kcov.c:207
Code: 48 8b 3d f4 36 ca 0c 48 89 de 5b e9 53 f5 56 00 0f 1f 00 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 40 28 78 7e 65 8b 15 41 28 78 7e c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 0c 16 00 00
RSP: 0018:ffffc90005f7f860 EFLAGS: 00000202
RAX: ffffffff81f92674 RBX: 0000000000000001 RCX: ffff88807da79dc0
RDX: 0000000080000000 RSI: ffffffff8b384960 RDI: ffffffff8b384920
RBP: 1ffff110067eed05 R08: ffffffff81f92662 R09: ffffed10067eecfe
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888033f76758
R13: dffffc0000000000 R14: ffff888033f767e8 R15: ffff888033f76828
FS: 00007ffaedcd9c80(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d624000 CR3: 000000002b8a3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_unlock include/linux/rcupdate.h:802 [inline]
dput+0x334/0x420 fs/dcache.c:901
step_into+0x355/0x1080 fs/namei.c:1851
walk_component fs/namei.c:2004 [inline]
link_path_walk+0x735/0xe70 fs/namei.c:2325
path_lookupat+0xa9/0x450 fs/namei.c:2478
filename_lookup+0x255/0x610 fs/namei.c:2508
user_path_at_empty+0x44/0x180 fs/namei.c:2907
do_readlinkat+0x118/0x3b0 fs/stat.c:477
__do_sys_readlink fs/stat.c:510 [inline]
__se_sys_readlink fs/stat.c:507 [inline]
__x64_sys_readlink+0x7f/0x90 fs/stat.c:507
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: 0033:0x7ffaed917d47
Code: 73 01 c3 48 8b 0d e1 90 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 59 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b1 90 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007ffc5e83a4b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007ffc5e83a4c8 RCX: 00007ffaed917d47
RDX: 0000000000000400 RSI: 00007ffc5e83a4c8 RDI: 00007ffc5e83a9a8
RBP: 0000000000000400 R08: 000055b1bd7da214 R09: 0000000000000000
R10: 0000000000000812 R11: 0000000000000246 R12: 00007ffc5e83a9a8
R13: 00007ffc5e83a918 R14: 000055b1bd7d9910 R15: 0000000000000000