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:24152 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:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0xc69/0x1ca0 kernel/locking/mutex.c:776
hfsplus_find_init+0x186/0x300 fs/hfsplus/bfind.c:28
hfsplus_cat_write_inode+0x255/0x7e0 fs/hfsplus/inode.c:625
hfsplus_write_inode+0x9b/0x5d0 fs/hfsplus/super.c:174
write_inode fs/fs-writeback.c:1582 [inline]
__writeback_single_inode+0xe68/0x14a0 fs/fs-writeback.c:1802
writeback_sb_inodes+0x72e/0x1ce0 fs/fs-writeback.c:2030
__writeback_inodes_wb+0xf8/0x2d0 fs/fs-writeback.c:2107
wb_writeback+0x799/0xae0 fs/fs-writeback.c:2218
wb_check_old_data_flush fs/fs-writeback.c:2322 [inline]
wb_do_writeback fs/fs-writeback.c:2375 [inline]
wb_workfn+0x8a0/0xbb0 fs/fs-writeback.c:2403
process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Showing all locks held in the system:
1 lock held by khungtaskd/41:
#0:
ffffffff8e3c96a0
(rcu_read_lock
){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6775
4 locks held by kworker/u32:2/46:
#0: ffff88801c3cc148
(
(wq_completion)writeback
){+.+.}-{0:0}
, at: process_one_work+0x128d/0x1b20 kernel/workqueue.c:3232
#1:
ffffc900007efc90 ((work_completion)(&(&wb->dwork)->work)
){+.+.}-{0:0}
, at: process_one_work+0x914/0x1b20 kernel/workqueue.c:3233
#2: ffff88802c6b40e0
(&type->s_umount_key
#68
){.+.+}-{4:4}
, at: super_trylock_shared+0x1e/0xf0 fs/super.c:563
#3:
ffff88803ccd80b0 (&tree->tree_lock){+.+.}-{4:4}, at: hfsplus_find_init+0x186/0x300 fs/hfsplus/bfind.c:28
2 locks held by getty/5733:
#0: ffff88801d6970a0
(&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1:
ffffc900000db2f0
(
&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x41b/0x1510 drivers/tty/n_tty.c:2211
11 locks held by syz-executor.0/6093:
=============================================
NMI backtrace for cpu 0
CPU: 0 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]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x133/0x180 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xe66/0x1180 kernel/hung_task.c:515
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Sending NMI from CPU 0 to CPUs 1-3:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6093 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:hlock_class kernel/locking/lockdep.c:234 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4879 [inline]
RIP: 0010:__lock_acquire+0x33f/0x2890 kernel/locking/lockdep.c:5187
Code: d0 83 c3 01 41 3b 9c 24 28 0b 00 00 7d 30 48 63 c3 48 8d 04 80 41 0f b7 44 c3 20 66 25 ff 1f 0f b7 c0 48 0f a3 05 d1 b8 1f 14 <72> ab 8b 05 e9 64 28 19 85 c0 0f 84 4b 01 00 00 31 c9 eb a9 44 38
RSP: 0018:ffffc90003eef1b0 EFLAGS: 00000007
RAX: 000000000000000c RBX: 0000000000000007 RCX: ffffffff95b992f8
RDX: 0000000000000004 RSI: 000000000000000a RDI: ffffffff9aeedbd8
RBP: 000000000000000a R08: 0000000000080000 R09: 0000000000000062
R10: 0000000000000000 R11: ffff88802ee8aff0 R12: ffff88802ee8a4c0
R13: 0000000000000003 R14: ffff88802ee8b180 R15: 0000000000000001
FS: 00007f67ea3bc6c0(0000) GS:ffff8880d69f5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fed0a87fc00 CR3: 0000000034cec000 CR4: 0000000000352ef0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x179/0x330 kernel/locking/lockdep.c:5825
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
uart_port_lock_irqsave include/linux/serial_core.h:717 [inline]
serial8250_console_write+0x181/0x1890 drivers/tty/serial/8250/8250_port.c:3301
console_emit_next_record kernel/printk/printk.c:3129 [inline]
console_flush_one_record+0x796/0xc60 kernel/printk/printk.c:3215
console_flush_all kernel/printk/printk.c:3289 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
console_unlock+0xef/0x240 kernel/printk/printk.c:3359
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426
_printk+0xc7/0x100 kernel/printk/printk.c:2451
is_bnode_offset_valid fs/hfsplus/hfsplus_fs.h:558 [inline]
hfsplus_bnode_read+0x404/0x5f0 fs/hfsplus/bnode.c:28
hfsplus_bnode_read_u16 fs/hfsplus/bnode.c:60 [inline]
hfsplus_bnode_dump+0x162/0x8e0 fs/hfsplus/bnode.c:362
hfsplus_brec_remove+0x4db/0x630 fs/hfsplus/brec.c:229
__hfsplus_delete_attr+0x2a0/0x3b0 fs/hfsplus/attributes.c:299
hfsplus_delete_all_attrs+0x15e/0x330 fs/hfsplus/attributes.c:378
hfsplus_delete_cat+0x960/0xf70 fs/hfsplus/catalog.c:425
hfsplus_unlink+0x212/0x7f0 fs/hfsplus/dir.c:385
vfs_unlink+0x3a4/0xb20 fs/namei.c:5369
do_unlinkat+0x37a/0x660 fs/namei.c:5439
__do_sys_unlink fs/namei.c:5474 [inline]
__se_sys_unlink fs/namei.c:5472 [inline]
__x64_sys_unlink+0xc5/0x110 fs/namei.c:5472
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f67e967dda9
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:00007f67ea3bc0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f67e97abf80 RCX: 00007f67e967dda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007f67e96ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f67e97abf80 R15: 00007ffc9bdeb638
NMI backtrace for cpu 3
CPU: 3 UID: 0 PID: 0 Comm: swapper/3 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: d6 5f 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 13 59 12 00 fb f4 cc 35 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000197de8 EFLAGS: 00000286
RAX: 000000000013a46b RBX: 0000000000000003 RCX: ffffffff8b7806d9
RDX: 0000000000000000 RSI: ffffffff8dacdec9 RDI: ffffffff8bf2b400
RBP: ffffed1003bdf000 R08: 0000000000000001 R09: ffffed100d4e673d
R10: ffff88806a7339eb R11: ffff88801def8b30 R12: 0000000000000003
R13: ffff88801def8000 R14: ffffffff9088b5d0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880d6bf5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fed13bad988 CR3: 0000000033854000 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:191 [inline]
do_idle+0x38d/0x510 kernel/sched/idle.c:332
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x148
NMI backtrace for cpu 2
CPU: 2 UID: 0 PID: 19791 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:rdtsc_ordered arch/x86/include/asm/tsc.h:57 [inline]
RIP: 0010:__pvclock_clocksource_read arch/x86/kernel/pvclock.c:77 [inline]
RIP: 0010:pvclock_clocksource_read_nowd+0x1a/0x100 arch/x86/kernel/pvclock.c:120
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 41 54 55 53 48 89 fb 48 83 ec 10 8b 17 83 e2 fe 41 89 d4 0f 01 f9 <66> 90 48 c1 e2 20 8b 6b 18 48 09 c2 48 89 d0 0f be 53 1c 48 2b 43
RSP: 0018:ffffc9000c98f338 EFLAGS: 00000202
RAX: 000000009909f6f8 RBX: ffffffff93b8f080 RCX: 0000000000000002
RDX: 00000000000000a0 RSI: ffffffff82337520 RDI: ffffffff93b8f080
RBP: 0000000000140cca R08: 0000000000001000 R09: 0000000000000000
R10: ffffed1008004c00 R11: dffffc0000000000 R12: 0000000000000004
R13: ffffea00010009c0 R14: dffffc0000000000 R15: ffff888035c924c0
FS: 00007fed1478e6c0(0000) GS:ffff8880d6af5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fed0a87fc00 CR3: 0000000033854000 CR4: 0000000000352ef0
Call Trace:
kvm_sched_clock_read+0x11/0x20 arch/x86/kernel/kvmclock.c:91
local_clock_noinstr+0xd/0xe0 kernel/sched/clock.c:304
local_clock+0x10/0x30 kernel/sched/clock.c:318
__set_page_owner+0x85/0x560 mm/page_owner.c:338
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2486
folio_alloc_mpol_noprof+0x36/0x2f0 mm/mempolicy.c:2505
shmem_alloc_folio+0x135/0x160 mm/shmem.c:1890
shmem_alloc_and_add_folio+0x494/0xc20 mm/shmem.c:1932
shmem_get_folio_gfp+0x67f/0x1610 mm/shmem.c:2556
shmem_get_folio mm/shmem.c:2662 [inline]
shmem_write_begin+0x1a4/0x3b0 mm/shmem.c:3315
generic_perform_write+0x3c4/0x900 mm/filemap.c:4314
shmem_file_write_iter+0x10e/0x140 mm/shmem.c:3490
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fed13a7caef
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48
RSP: 002b:00007fed1478de80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000080000 RCX: 00007fed13a7caef
RDX: 0000000000080000 RSI: 00007fed0a800000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000005f2
R10: 00000000000007da R11: 0000000000000293 R12: 0000000000000003
R13: 00007fed1478df80 R14: 00007fed1478df40 R15: 00007fed0a800000