EXT4-fs (loop0): warning: checktime reached, running e2fsck is recommended
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
INFO: task syz-executor247:7978 blocked for more than 140 seconds.
Not tainted 4.14.302-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor247 D27448 7978 7977 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2811 [inline]
__schedule+0x88b/0x1de0 kernel/sched/core.c:3387
schedule+0x8d/0x1b0 kernel/sched/core.c:3431
io_schedule+0xb5/0x120 kernel/sched/core.c:5035
bit_wait_io+0x12/0x90 kernel/sched/wait_bit.c:249
__wait_on_bit_lock+0xc2/0x1d0 kernel/sched/wait_bit.c:89
out_of_line_wait_on_bit_lock+0xbc/0xd0 kernel/sched/wait_bit.c:116
wait_on_bit_lock_io include/linux/wait_bit.h:213 [inline]
__lock_buffer+0x43/0x50 fs/buffer.c:72
lock_buffer include/linux/buffer_head.h:408 [inline]
__sync_dirty_buffer+0x214/0x290 fs/buffer.c:3235
__ext4_handle_dirty_metadata+0x169/0x480 fs/ext4/ext4_jbd2.c:300
ext4_finish_convert_inline_dir fs/ext4/inline.c:1190 [inline]
ext4_convert_inline_data_nolock+0x8d8/0xc60 fs/ext4/inline.c:1266
ext4_try_add_inline_entry+0x2a5/0x4a0 fs/ext4/inline.c:1339
ext4_add_entry+0x2ee/0xa40 fs/ext4/namei.c:2138
ext4_mkdir+0x5cf/0xbd0 fs/ext4/namei.c:2732
vfs_mkdir+0x463/0x6e0 fs/namei.c:3851
SYSC_mkdirat fs/namei.c:3874 [inline]
SyS_mkdirat+0x1fd/0x270 fs/namei.c:3858
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fb43a343239
RSP: 002b:00007ffdf73c3c98 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fb43a343239
RDX: 0000000000000000 RSI: 0000000020000540 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00007fb43a3b1ec0 R09: 00007fb43a3b1ec0
R10: 00007fb43a3b1ec0 R11: 0000000000000246 R12: 00007ffdf73c3cc0
R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/1532:
#0: (tasklist_lock){.+.+}, at: [<ffffffff8702b3a4>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548
1 lock held by in:imklog/7686:
#0: (&f->f_pos_lock){+.+.}, at: [<ffffffff818d8f8b>] __fdget_pos+0x1fb/0x2b0 fs/file.c:819
3 locks held by syz-executor247/7978:
#0: (sb_writers#3){.+.+}, at: [<ffffffff818e1ffa>] sb_start_write include/linux/fs.h:1551 [inline]
#0: (sb_writers#3){.+.+}, at: [<ffffffff818e1ffa>] mnt_want_write+0x3a/0xb0 fs/namespace.c:386
#1: (&type->i_mutex_dir_key#3/1){+.+.}, at: [<ffffffff818a98ca>] inode_lock_nested include/linux/fs.h:754 [inline]
#1: (&type->i_mutex_dir_key#3/1){+.+.}, at: [<ffffffff818a98ca>] filename_create+0x12a/0x3f0 fs/namei.c:3676
#2: (&ei->xattr_sem){++++}, at: [<ffffffff81b9a432>] ext4_write_lock_xattr fs/ext4/xattr.h:154 [inline]
#2: (&ei->xattr_sem){++++}, at: [<ffffffff81b9a432>] ext4_try_add_inline_entry+0xc2/0x4a0 fs/ext4/inline.c:1297
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1532 Comm: khungtaskd Not tainted 4.14.302-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
watchdog+0x5b9/0xb40 kernel/hung_task.c:274
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.302-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
task: ffffffff88e74480 task.stack: ffffffff88e00000
RIP: 0010:check_preemption_disabled+0xc/0x240 lib/smp_processor_id.c:13
RSP: 0018:ffffffff88e07e48 EFLAGS: 00000097
RAX: ffffffff88e74480 RBX: ffffffff88f7ab08 RCX: 1ffffffff11997ac
RDX: 0000000000000000 RSI: ffffffff878b2ec0 RDI: ffffffff87cd1280
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ba42ca80
R13: ffffffff878b2ec0 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1b02075000 CR3: 00000000a14f8000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_eqs_enter_common+0x14d/0x360 kernel/rcu/tree.c:797
cpuidle_idle_call kernel/sched/idle.c:153 [inline]
do_idle+0x16d/0x3c0 kernel/sched/idle.c:246
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:351
start_kernel+0x743/0x763 init/main.c:712
secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240
Code: 4b 97 64 fe e9 46 fb ff ff e8 11 d4 3a fe 4d 89 e5 48 89 ac 24 c8 00 00 00 e9 d7 fb ff ff 90 41 57 41 56 41 55 49 89 f5 41 54 55 <48> 89 fd 53 e8 eb d3 3a fe 65 44 8b 25 d3 9a e7 7c 65 8b 05 ec