INFO: task syz-executor264:5074 blocked for more than 143 seconds.
Not tainted 6.2.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor264 state:D stack:20176 pid:5074 ppid:5073 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: 0033:0x7f602745b319
RSP: 002b:00007ffea339e918 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f602749f870 RCX: 00007f602745b319
RDX: 0000000020000040 RSI: 0000000040305828 RDI: 0000000000000005
RBP: 0000000000000000 R08: 00007f60274c9ec0 R09: 00007f60274c9ec0
R10: 00007f60274c9ec0 R11: 0000000000000246 R12: 00007ffea339e940
R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000
Showing all locks held in the system:
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: ffff88802c12a098 (&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
3 locks held by syz-executor264/5074:
#0: ffff88802200a460 (sb_writers#4){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2938 [inline]
#0: ffff88802200a460 (sb_writers#4){.+.+}-{0:0}, at: vfs_fallocate+0x489/0x670 fs/open.c:322
#1: ffff8880259ea218 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline]
#1: ffff8880259ea218 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_fallocate+0x141/0x1ca0 fs/ext4/extents.c:4700
#2: ffff8880259e9ee0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff8880259e9ee0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_convert_inline_data+0x3a4/0x610 fs/ext4/inline.c:2064
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 6.2.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:insn_get_prefixes+0xa7b/0x1900 arch/x86/lib/insn.c:193
Code: 00 00 c6 03 08 49 8d 6d 0c 48 89 e8 48 c1 e8 03 42 8a 04 30 84 c0 0f 85 03 08 00 00 c6 45 00 01 48 8b 44 24 30 42 80 3c 30 00 <48> 8b 5c 24 28 74 08 48 89 df e8 16 d4 32 f7 48 8b 2b 48 8d 5d 01
RSP: 0018:ffffc900000e7668 EFLAGS: 00000246
RAX: 1ffff9200001cf41 RBX: 0000000000000000 RCX: ffff88813fef0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000c
RBP: ffffc900000e79ac R08: ffffffff8aaeb0c5 R09: ffffc900000e79a0
R10: fffff5200001cf3f R11: 1ffff9200001cf34 R12: ffffc900000e7a00
R13: ffffc900000e79a0 R14: dffffc0000000000 R15: 1ffff9200001cf3e
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd21f7ba990 CR3: 000000000d08e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
insn_get_opcode+0x1b2/0xa90 arch/x86/lib/insn.c:272
insn_get_modrm+0x221/0x760 arch/x86/lib/insn.c:343
insn_get_sib arch/x86/lib/insn.c:421 [inline]
insn_get_displacement+0x131/0x9a0 arch/x86/lib/insn.c:464
insn_get_immediate+0x427/0x12e0 arch/x86/lib/insn.c:632
insn_get_length arch/x86/lib/insn.c:707 [inline]
insn_decode+0x3b0/0x550 arch/x86/lib/insn.c:747
text_poke_loc_init+0xb3/0x500 arch/x86/kernel/alternative.c:2051
arch_jump_label_transform_queue+0x70/0xd0 arch/x86/kernel/jump_label.c:138
__jump_label_update+0x19b/0x3b0 kernel/jump_label.c:475
static_key_disable_cpuslocked+0xc8/0x1b0 kernel/jump_label.c:235
static_key_disable+0x16/0x20 kernel/jump_label.c:243
toggle_allocation_gate+0x1a8/0x240 mm/kfence/core.c:804
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