INFO: task kworker/u32:2:46 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u32:2 state:D stack:26008 pid:46 tgid:46 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
__mutex_lock_common kernel/locking/mutex.c:676 [inline]
__mutex_lock+0x818/0x1060 kernel/locking/mutex.c:760
hfsplus_find_init+0x186/0x2d0 fs/hfsplus/bfind.c:28
hfsplus_cat_write_inode+0x255/0x7e0 fs/hfsplus/inode.c:592
hfsplus_write_inode+0x9b/0x5a0 fs/hfsplus/super.c:174
write_inode fs/fs-writeback.c:1564 [inline]
__writeback_single_inode+0xb3e/0xfb0 fs/fs-writeback.c:1784
writeback_sb_inodes+0x60d/0xfa0 fs/fs-writeback.c:2015
__writeback_inodes_wb+0xf8/0x2d0 fs/fs-writeback.c:2086
wb_writeback+0x7f3/0xb70 fs/fs-writeback.c:2197
wb_check_old_data_flush fs/fs-writeback.c:2301 [inline]
wb_do_writeback fs/fs-writeback.c:2354 [inline]
wb_workfn+0x8ca/0xbe0 fs/fs-writeback.c:2382
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Showing all locks held in the system:
1 lock held by ksoftirqd/1/28:
#0: ffff88806a53a398
(&rq->__lock){-.-.}-{2:2}
, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:638
1 lock held by khungtaskd/41:
#0:
ffffffff8e3c4460 (
rcu_read_lock){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6775
4 locks held by kworker/u32:2/46:
#0: ffff88801d685148
((wq_completion)writeback
){+.+.}-{0:0}
, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3238
#1: ffffc900007efd00
((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}
, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3239
#2: ffff888105c5a0e0
(&type->s_umount_key#66
){.+.+}-{4:4}
, at: super_trylock_shared+0x1e/0xf0 fs/super.c:562
#3:
ffff88802baf40b0 (
&tree->tree_lock){+.+.}-{4:4}, at: hfsplus_find_init+0x186/0x2d0 fs/hfsplus/bfind.c:28
2 locks held by getty/5740:
#0:
ffff88802c36b0a0
(&tty->ldisc_sem){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900033fb2f0
(&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
8 locks held by syz-executor.0/6112:
3 locks held by syz-executor.0/6151:
#0: ffff88806a53a398
(&rq->__lock){-.-.}-{2:2}
, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:638
#1: ffffffff8e58afe0 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}
, at: psi_sched_switch kernel/sched/stats.h:220 [inline]
, at: __schedule+0x1861/0x5de0 kernel/sched/core.c:6923
#2: ffff88802a3bac18 (
ptlock_ptr(ptdesc)#2
){+.+.}-{3:3}, at: current_time+0x82/0x1a0 fs/inode.c:2293
5 locks held by syz-executor.0/19937:
#0: ffff88806a53a398
(&rq->__lock){-.-.}-{2:2}
, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:638
#1: ffff88806a524088 (psi_seq){-.-.}-{0:0}
, at: psi_sched_switch kernel/sched/stats.h:220 [inline]
, at: __schedule+0x1861/0x5de0 kernel/sched/core.c:6923
#2: ffffffff8e3c4460 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#2: ffffffff8e3c4460 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#2: ffffffff8e3c4460 (rcu_read_lock){....}-{1:3}, at: select_task_rq_fair+0x372/0x45e0 kernel/sched/fair.c:8590
#3: ffffffff8e3c4460
(rcu_read_lock
){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
, at: page_table_check_set+0x17f/0x750 mm/page_table_check.c:112
#4:
ffff88806a524088 (
psi_seq
){-.-.}-{0:0}, at: psi_enqueue kernel/sched/stats.h:166 [inline]
){-.-.}-{0:0}, at: enqueue_task+0x20e/0x4e0 kernel/sched/core.c:2094
=============================================
NMI backtrace for cpu 3
CPU: 3 UID: 0 PID: 41 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
watchdog+0xf3f/0x1170 kernel/hung_task.c:495
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 3 to CPUs 0-2:
NMI backtrace for cpu 2
CPU: 2 UID: 0 PID: 6112 Comm: syz-executor.0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:io_serial_in+0x87/0xb0 drivers/tty/serial/8250/8250_port.c:401
Code: 51 8c fc 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 1a 66 03 5d 40 89 da ec <5b> 0f b6 c0 5d 41 5c e9 cd ee 39 06 e8 38 dd f4 fc eb a2 e8 c1 dd
RSP: 0018:ffffc900030f7318 EFLAGS: 00000006
RAX: dffffc0000000005 RBX: 00000000000003f9 RCX: 0000000000000000
RDX: 00000000000003f9 RSI: ffffffff8530f8a0 RDI: ffffffff9ae0f860
RBP: ffffffff9ae0f820 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffffffff9ae0f870 R14: ffffffff9ae0f820 R15: ffffffff9ae0fae0
FS: 00007fa9037f66c0(0000) GS:ffff8880d6bd1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe2453a8000 CR3: 00000000311d8000 CR4: 0000000000352ef0
Call Trace:
serial_port_in include/linux/serial_core.h:806 [inline]
serial8250_console_write+0x249/0x1890 drivers/tty/serial/8250/8250_port.c:3306
console_emit_next_record kernel/printk/printk.c:3111 [inline]
console_flush_all+0x801/0xc60 kernel/printk/printk.c:3199
__console_flush_and_unlock kernel/printk/printk.c:3258 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3298
vprintk_emit+0x3d7/0x680 kernel/printk/printk.c:2423
_printk+0xc7/0x100 kernel/printk/printk.c:2448
is_bnode_offset_valid fs/hfsplus/hfsplus_fs.h:557 [inline]
hfsplus_bnode_read+0x4b9/0x690 fs/hfsplus/bnode.c:28
hfsplus_bnode_read_u16 fs/hfsplus/bnode.c:60 [inline]
hfsplus_bnode_dump+0x162/0x800 fs/hfsplus/bnode.c:362
hfsplus_brec_remove+0x4ad/0x610 fs/hfsplus/brec.c:229
__hfsplus_delete_attr+0x2a0/0x3b0 fs/hfsplus/attributes.c:299
hfsplus_delete_all_attrs+0x15e/0x310 fs/hfsplus/attributes.c:378
hfsplus_delete_cat+0x93b/0xf40 fs/hfsplus/catalog.c:425
hfsplus_unlink+0x212/0x7f0 fs/hfsplus/dir.c:385
vfs_unlink+0x2fe/0x9b0 fs/namei.c:4673
do_unlinkat+0x4c5/0x6a0 fs/namei.c:4737
__do_sys_unlink fs/namei.c:4783 [inline]
__se_sys_unlink fs/namei.c:4781 [inline]
__x64_sys_unlink+0xc5/0x110 fs/namei.c:4781
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa902a7dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa9037f60c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007fa902babf80 RCX: 00007fa902a7dda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007fa902aca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa902babf80 R15: 00007ffd14b63018
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 19945 Comm: syz-executor.0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x10/0x70 kernel/kcov.c:217
Code: 00 00 5b e9 92 0b ef 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 34 24 65 48 8b 15 b8 a5 e7 11 <65> 8b 05 c9 a5 e7 11 a9 00 01 ff 00 74 1d f6 c4 01 74 43 a9 00 00
RSP: 0000:ffffc9000dca7890 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81fa2865
RDX: ffff888025e12480 RSI: ffffffff81f98b5e RDI: ffffea0001163140
RBP: ffffea0001163140 R08: 0000000000000000 R09: fffff9400022c628
R10: ffffea0001163147 R11: 0000000000000001 R12: ffff88801d2f0888
R13: ffffc9000dca7988 R14: 0000000000000000 R15: ffff88807ffd7400
FS: 000055555f4fb480(0000) GS:ffff8880d6ad1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe2453abf84 CR3: 000000003a96f000 CR4: 0000000000352ef0
Call Trace:
const_folio_flags+0xe/0x100 include/linux/page-flags.h:349
folio_test_active include/linux/page-flags.h:560 [inline]
folio_lru_list include/linux/mm_inline.h:97 [inline]
lruvec_del_folio include/linux/mm_inline.h:371 [inline]
__page_cache_release.part.0+0x21e/0xb40 mm/swap.c:78
__page_cache_release include/linux/huge_mm.h:504 [inline]
folios_put_refs+0x64f/0x750 mm/swap.c:987
folios_put include/linux/mm.h:1484 [inline]
folio_batch_move_lru+0x278/0x3a0 mm/swap.c:179
__folio_batch_add_and_move+0x318/0xc40 mm/swap.c:196
folio_add_lru_vma+0xb0/0x100 mm/swap.c:530
wp_page_copy mm/memory.c:3747 [inline]
do_wp_page+0x17b8/0x52b0 mm/memory.c:4140
handle_pte_fault mm/memory.c:6193 [inline]
__handle_mm_fault+0x1ae3/0x2aa0 mm/memory.c:6318
handle_mm_fault+0x589/0xd10 mm/memory.c:6487
do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x64/0xc0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7fe24523737b
Code: d0 00 00 00 83 fd 20 0f 84 95 05 00 00 41 80 7c 24 04 00 4d 89 e6 4d 8d 4c 24 0c 75 d2 80 3d 50 e3 c9 00 00 0f 85 55 03 00 00 <41> c6 44 24 04 01 41 89 2c 24 41 c6 44 24 20 00 49 c7 46 08 00 00
RSP: 002b:00007ffd7ea7da60 EFLAGS: 00010246
RAX: 00007ffd7ea7dbc0 RBX: 00007ffd7ea7dbc0 RCX: 0000000000000000
RDX: 00007fe244e007f8 RSI: 00007ffd7ea7dc38 RDI: 00007ffd7ea7dc40
RBP: 0000000000000000 R08: 00007fe244e007f8 R09: 00007fe2453abf8c
R10: 0000000000000007 R11: 00011b7987fe7358 R12: 00007fe2453abf80
R13: 0000000000001034 R14: 00007fe2453abf80 R15: 00007ffd7ea7db68
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82
Code: 57 73 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d 43 35 22 00 fb f4 3c 0a 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffffff8e007df8 EFLAGS: 00000286
RAX: 000000000019fa75 RBX: 0000000000000000 RCX: ffffffff8b67f2a9
RDX: 0000000000000000 RSI: ffffffff8db06380 RDI: ffffffff8bf1de40
RBP: fffffbfff1c12f40 R08: 0000000000000001 R09: ffffed100d486655
R10: ffff88806a4332ab R11: 0000000000000001 R12: 0000000000000000
R13: ffffffff8e097a00 R14: ffffffff90833ad0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880d69d1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555f4fb788 CR3: 00000000213c7000 CR4: 0000000000352ef0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:190 [inline]
do_idle+0x38d/0x500 kernel/sched/idle.c:330
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:428
rest_init+0x16b/0x2b0 init/main.c:757
start_kernel+0x3f6/0x4e0 init/main.c:1111
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148