INFO: task kworker/1:0:23 blocked for more than 143 seconds.
Not tainted 6.8.0-rc4-syzkaller-00410-gc02197fc9076 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0 state:D stack:23600 pid:23 tgid:23 ppid:2 flags:0x00004000
Workqueue: xfs-sync/loop0 xfs_flush_inodes_worker
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
sync_inodes_sb+0x293/0xb20 fs/fs-writeback.c:2758
xfs_flush_inodes_worker+0x61/0x80 fs/xfs/xfs_super.c:616
process_one_work kernel/workqueue.c:2633 [inline]
process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
INFO: task syz-executor.0:24990 blocked for more than 144 seconds.
Not tainted 6.8.0-rc4-syzkaller-00410-gc02197fc9076 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:25112 pid:24990 tgid:24990 ppid:5091 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
coredump_task_exit kernel/exit.c:439 [inline]
do_exit+0x576/0x2740 kernel/exit.c:825
do_group_exit+0x206/0x2c0 kernel/exit.c:1020
get_signal+0x176d/0x1850 kernel/signal.c:2893
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0xc8/0x370 kernel/entry/common.c:212
do_syscall_64+0x108/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fae4367dda9
RSP: 002b:00007ffe868bae98 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 0000000000125e48 RCX: 00007fae4367dda9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fae437abf8c
RBP: 0000000000000032 R08: 00007fae437abf8c R09: 00007fae437abf8c
R10: 00007ffe868bafd0 R11: 0000000000000246 R12: 00007fae437abf8c
R13: 0000000000125e7a R14: 00007ffe868baff0 R15: 00007ffe868bafd0
INFO: task syz-executor.0:24991 blocked for more than 144 seconds.
Not tainted 6.8.0-rc4-syzkaller-00410-gc02197fc9076 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:21968 pid:24991 tgid:24990 ppid:5091 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2159
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x354/0x620 kernel/sched/completion.c:148
__flush_work+0x950/0xad0 kernel/workqueue.c:3410
xfs_file_buffered_write+0x35b/0xaa0 fs/xfs/xfs_file.c:808
__kernel_write_iter+0x434/0x8c0 fs/read_write.c:523
dump_emit_page fs/coredump.c:888 [inline]
dump_user_range+0x46c/0x910 fs/coredump.c:915
elf_core_dump+0x3d5d/0x4630 fs/binfmt_elf.c:2077
do_coredump+0x1baa/0x2b50 fs/coredump.c:764
get_signal+0x146a/0x1850 kernel/signal.c:2879
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0xc8/0x370 kernel/entry/common.c:212
do_syscall_64+0x108/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fae4367dda9
RSP: 002b:00007fae443e20c8 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffe5 RBX: 00007fae437abf80 RCX: 00007fae4367dda9
RDX: 0000000000000000 RSI: 00000020000007fe RDI: 0000000000000004
RBP: 00007fae436ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fae437abf80 R15: 00007ffe868badb8
Showing all locks held in the system:
2 locks held by kworker/0:1/9:
4 locks held by kworker/1:0/23:
#0: ffff88801fd5e138 ((wq_completion)xfs-sync/loop0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff88801fd5e138 ((wq_completion)xfs-sync/loop0){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc900001d7d20 ((work_completion)(&mp->m_flush_inodes_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc900001d7d20 ((work_completion)(&mp->m_flush_inodes_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#2: ffff88803f0fe0e0 (&type->s_umount_key#74){++++}-{3:3}, at: xfs_flush_inodes_worker+0x45/0x80 fs/xfs/xfs_super.c:615
#3: ffff8880200b27d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline]
#3: ffff8880200b27d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x274/0xb20 fs/fs-writeback.c:2756
1 lock held by khungtaskd/29:
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
4 locks held by kworker/u4:3/49:
#0:
ffff88801929dd38 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
ffff88801929dd38 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1:
ffffc90000b9fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
ffffc90000b9fd20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#2: ffff88803f0fe610
(
sb_internal#3){.+.+}-{0:0}
, at: xfs_bmapi_convert_delalloc+0x267/0x1320 fs/xfs/libxfs/xfs_bmap.c:4542
#3: ffff888032c30118 (&xfs_nondir_ilock_class#3){++++}-{3:3}, at: xfs_bmapi_convert_delalloc+0x295/0x1320 fs/xfs/libxfs/xfs_bmap.c:4547
2 locks held by getty/4817:
#0: ffff88802bab30a0 (&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+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by kworker/1:5/5147:
#0: ffff8880b953c918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9528988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
2 locks held by kworker/1:6/5148:
#0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc900048afd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc900048afd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
2 locks held by syz-executor.0/24991:
#0: ffff88803f0fe420 (sb_writers#16){.+.+}-{0:0}, at: do_coredump+0x1b78/0x2b50 fs/coredump.c:763
#1: ffff888032c30338 (&sb->s_type->i_mutex_key#23){++++}-{3:3}, at: xfs_ilock+0xf2/0x3b0 fs/xfs/xfs_inode.c:190
4 locks held by kworker/1:3/25120:
5 locks held by syz-executor.1/27351:
#0: ffff8880b953c918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9528988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
#2: ffff88802b44a3e8 (&(&sig->stats_lock)->lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
#2: ffff88802b44a3e8 (&(&sig->stats_lock)->lock){....}-{2:2}, at: write_seqlock include/linux/seqlock.h:822 [inline]
#2: ffff88802b44a3e8 (&(&sig->stats_lock)->lock){....}-{2:2}, at: __exit_signal kernel/exit.c:189 [inline]
#2: ffff88802b44a3e8 (&(&sig->stats_lock)->lock){....}-{2:2}, at: release_task+0x821/0x1810 kernel/exit.c:259
#3:
ffff88802b44a3a0 (&____s->seqcount#4){....}-{0:0}, at: exit_notify kernel/exit.c:767 [inline]
ffff88802b44a3a0 (&____s->seqcount#4){....}-{0:0}, at: do_exit+0x1a62/0x2740 kernel/exit.c:891
#4: ffff88802ccd2890 (&alloc_meta->aux_lock){-.-.}-{2:2}
, at: __kasan_record_aux_stack+0xc2/0x100 mm/kasan/generic.c:594
1 lock held by syz-executor.0/27353:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc4-syzkaller-00410-gc02197fc9076 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 25120 Comm: kworker/1:3 Not tainted 6.8.0-rc4-syzkaller-00410-gc02197fc9076 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: xfs-buf/loop0 xfs_buf_ioend_work
RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:410
Code: e0 70 70 fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 91 40 cf fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d c3 cc cc cc cc 89 e9 80 e1 07 38 c1 7c
RSP: 0018:ffffc90013fa7278 EFLAGS: 00000002
RAX: 1ffffffff28ef400 RBX: ffffffff9477a760 RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: ffffffff8522fa06 R09: 1ffff11003ed2046
R10: dffffc0000000000 R11: ffffffff8522f9c0 R12: dffffc0000000000
R13: 000000000000270d R14: 00000000000003fd R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 000000007a4a6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
serial_in drivers/tty/serial/8250/8250.h:117 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:139 [inline]
wait_for_lsr drivers/tty/serial/8250/8250_port.c:2081 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3366 [inline]
serial8250_console_write+0x110d/0x1840 drivers/tty/serial/8250/8250_port.c:3444
console_emit_next_record kernel/printk/printk.c:2901 [inline]
console_flush_all+0x808/0xec0 kernel/printk/printk.c:2967
console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3036
vprintk_emit+0x508/0x720 kernel/printk/printk.c:2303
_printk+0xd5/0x120 kernel/printk/printk.c:2328
print_hex_dump+0x1a6/0x250 lib/hexdump.c:285
xfs_hex_dump+0x3d/0x50 fs/xfs/xfs_message.c:110
xfs_buf_verifier_error+0x1ce/0x2a0 fs/xfs/xfs_error.c:460
xfs_allocbt_read_verify+0x5e/0xd0
xfs_buf_ioend+0x278/0x700 fs/xfs/xfs_buf.c:1309
process_one_work kernel/workqueue.c:2633 [inline]
process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242