INFO: task syz-executor.3:29242 blocked for more than 143 seconds.
Not tainted 6.2.0-rc4-syzkaller-00350-gedc00350d205 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:19848 pid:29242 ppid:5107 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0x995/0xe20 kernel/sched/core.c:6606
schedule+0xcb/0x190 kernel/sched/core.c:6682
rwsem_down_write_slowpath+0xfc1/0x1480 kernel/locking/rwsem.c:1190
__down_write_common kernel/locking/rwsem.c:1305 [inline]
__down_write kernel/locking/rwsem.c:1314 [inline]
down_write+0x231/0x270 kernel/locking/rwsem.c:1563
inode_lock include/linux/fs.h:756 [inline]
ext4_buffered_write_iter+0xae/0x3a0 fs/ext4/file.c:279
ext4_file_write_iter+0x1d0/0x18f0
do_iter_write+0x6c2/0xc20 fs/read_write.c:861
iter_file_splice_write+0x7fc/0xfc0 fs/splice.c:686
do_splice_from fs/splice.c:764 [inline]
direct_splice_actor+0xe6/0x1c0 fs/splice.c:931
splice_direct_to_actor+0x4e4/0xc00 fs/splice.c:886
do_splice_direct+0x279/0x3d0 fs/splice.c:974
do_sendfile+0x5fb/0xf80 fs/read_write.c:1255
__do_sys_sendfile64 fs/read_write.c:1323 [inline]
__se_sys_sendfile64+0x14f/0x1b0 fs/read_write.c:1309
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb4cea8c0c9
RSP: 002b:00007fb4cf8a6168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fb4cebabf80 RCX: 00007fb4cea8c0c9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000007
RBP: 00007fb4ceae7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000001ffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe6c41f21f R14: 00007fb4cf8a6300 R15: 0000000000022000
INFO: task syz-executor.3:29249 blocked for more than 144 seconds.
Not tainted 6.2.0-rc4-syzkaller-00350-gedc00350d205 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:21992 pid:29249 ppid:5107 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0x995/0xe20 kernel/sched/core.c:6606
schedule+0xcb/0x190 kernel/sched/core.c:6682
io_schedule+0x83/0x100 kernel/sched/core.c:8862
bit_wait_io+0xe/0xc0 kernel/sched/wait_bit.c:209
__wait_on_bit_lock+0xbb/0x1a0 kernel/sched/wait_bit.c:90
out_of_line_wait_on_bit_lock+0x1c3/0x240 kernel/sched/wait_bit.c:117
wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
__lock_buffer fs/buffer.c:69 [inline]
lock_buffer include/linux/buffer_head.h:397 [inline]
__sync_dirty_buffer+0x107/0x330 fs/buffer.c:2732
__ext4_handle_dirty_metadata+0x29a/0x810 fs/ext4/ext4_jbd2.c:387
ext4_convert_inline_data_nolock+0x6e5/0x820 fs/ext4/inline.c:1255
ext4_convert_inline_data+0x4c8/0x610 fs/ext4/inline.c:2066
ext4_fallocate+0x149/0x1ca0 fs/ext4/extents.c:4701
vfs_fallocate+0x515/0x670 fs/open.c:323
do_vfs_ioctl+0x2163/0x2980 fs/ioctl.c:849
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl+0x83/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb4cea8c0c9
RSP: 002b:00007fb4cf885168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb4cebac050 RCX: 00007fb4cea8c0c9
RDX: 0000000020000100 RSI: 0000000040305828 RDI: 0000000000000007
RBP: 00007fb4ceae7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe6c41f21f R14: 00007fb4cf885300 R15: 0000000000022000
Showing all locks held in the system:
2 locks held by kworker/u4:0/9:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d326fd0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d3277d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8d326e00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4744:
#0: ffff88802896b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177
1 lock held by syz-executor.5/5099:
#0: ffff88807518c0e0 (&type->s_umount_key#55){++++}-{3:3}, at: deactivate_super+0x96/0xd0 fs/super.c:362
1 lock held by syz-executor.2/5111:
#0: ffff88808a2280e0 (&type->s_umount_key#55){++++}-{3:3}, at: deactivate_super+0x96/0xd0 fs/super.c:362
2 locks held by kworker/0:4/5157:
#0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
#1: ffffc900045bfd00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
3 locks held by kworker/0:6/5160:
#0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
#1: ffffc900045dfd00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
#2: ffffffff8d32c478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#2: ffffffff8d32c478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x384/0x860 kernel/rcu/tree_exp.h:946
3 locks held by kworker/1:15/6154:
#0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
#1: ffffc90015f67d00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
#2: ffffffff8d32c478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#2: ffffffff8d32c478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x455/0x860 kernel/rcu/tree_exp.h:946
2 locks held by syz-executor.3/29242:
#0: ffff888078e26460 (sb_writers#4){.+.+}-{0:0}, at: do_sendfile+0x5d6/0xf80 fs/read_write.c:1254
#1: ffff88807849a218 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline]
#1: ffff88807849a218 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xae/0x3a0 fs/ext4/file.c:279
3 locks held by syz-executor.3/29249:
#0: ffff888078e26460 (sb_writers#4){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2938 [inline]
#0: ffff888078e26460 (sb_writers#4){.+.+}-{0:0}, at: vfs_fallocate+0x489/0x670 fs/open.c:322
#1: ffff88807849a218 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline]
#1: ffff88807849a218 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_fallocate+0x141/0x1ca0 fs/ext4/extents.c:4700
#2: ffff888078499ee0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff888078499ee0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x3a4/0x610 fs/ext4/inline.c:2064
2 locks held by kworker/0:0/29422:
#0: ffff888012870d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
#1: ffffc90005e77d00 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
1 lock held by syz-executor.3/31781:
#0: ffff8880b993a1d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:537
2 locks held by syz-executor.1/31802:
5 locks held by syz-executor.3/31803:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc4-syzkaller-00350-gedc00350d205 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46f/0x4f0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ba/0x420 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xcd5/0xd20 kernel/hung_task.c:377
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5157 Comm: kworker/0:4 Not tainted 6.2.0-rc4-syzkaller-00350-gedc00350d205 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Workqueue: events pwq_unbound_release_workfn
RIP: 0010:remove_class_from_lock_chain kernel/locking/lockdep.c:5959 [inline]
RIP: 0010:remove_class_from_lock_chains kernel/locking/lockdep.c:5997 [inline]
RIP: 0010:zap_class+0x30f/0x810 kernel/locking/lockdep.c:6039
Code: eb 08 66 0f 1f 84 00 00 00 00 00 81 fb 00 00 14 00 73 7c 48 63 c3 48 8d ac 00 80 a0 21 90 48 89 e8 48 c1 e8 03 42 0f b6 04 30 <84> c0 75 35 0f b7 6d 00 81 e5 ff 1f 00 00 43 0f b6 44 35 00 84 c0
RSP: 0018:ffffc900045bfac8 EFLAGS: 00000807
RAX: 0000000000000000 RBX: 000000000001ae4f RCX: ffffffff816c70ae
RDX: 0000000000000001 RSI: 0000000000001428 RDI: 0000000000001424
RBP: ffffffff9024fd1e R08: dffffc0000000000 R09: fffffbfff20fc861
R10: fffffbfff20fc861 R11: 1ffffffff20fc860 R12: 0000000000000c2b
R13: 1ffffffff2116024 R14: dffffc0000000000 R15: ffffffff908b0120
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f90bf710000 CR3: 0000000043971000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lockdep_free_key_range kernel/locking/lockdep.c:6158 [inline]
lockdep_unregister_key+0x440/0x5b0 kernel/locking/lockdep.c:6354
wq_unregister_lockdep kernel/workqueue.c:3497 [inline]
pwq_unbound_release_workfn+0x245/0x290 kernel/workqueue.c:3735
process_one_work+0x877/0xdb0 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308