bisecting fixing commit since ffb217a13a2eaf6d5bd974fc83036a53ca69f1e2
building syzkaller on 7bdd8b2c56b883af3e65b261cd7c942104dc2ecc
testing commit ffb217a13a2eaf6d5bd974fc83036a53ca69f1e2
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: ab02d5008d8fec770bd41c5c35404da0862767c3c32e459c8588c11c7a04faa7
run #0: crashed: INFO: task hung in chown_common
run #1: crashed: INFO: task hung in chown_common
run #2: crashed: INFO: task hung in chown_common
run #3: crashed: INFO: task hung in chown_common
run #4: crashed: INFO: task hung in chown_common
run #5: crashed: INFO: task hung in chown_common
run #6: crashed: INFO: task hung in chown_common
run #7: crashed: INFO: task hung in corrupted
run #8: crashed: INFO: task hung in chown_common
run #9: crashed: INFO: task hung in chown_common
run #10: crashed: INFO: task hung in chown_common
run #11: crashed: INFO: task hung in chown_common
run #12: crashed: INFO: task hung in chown_common
run #13: crashed: INFO: task hung in chown_common
run #14: crashed: INFO: task hung in chown_common
run #15: crashed: INFO: task hung in chown_common
run #16: crashed: INFO: task hung in chown_common
run #17: crashed: INFO: task hung in chown_common
run #18: crashed: INFO: task hung in chown_common
run #19: crashed: INFO: task hung in chown_common
testing current HEAD 5a29232d870d9e63fe5ff30b081be6ea7cc2465d
testing commit 5a29232d870d9e63fe5ff30b081be6ea7cc2465d
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 8b8901d7beabeb2fa6fae1863da2a70ea0f4e7abc722f334157f5357dcb516c3
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: task hung in chown_common
run #6: crashed: INFO: task hung in chown_common
run #7: crashed: INFO: task hung in chown_common
run #8: crashed: INFO: task hung in chown_common
run #9: crashed: INFO: task hung in chown_common
revisions tested: 2, total time: 27m14.769271082s (build: 12m40.704046881s, test: 13m49.857964763s)
the crash still happens on HEAD
commit msg: Merge tag 'for-5.19-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
crash: INFO: task hung in chown_common
INFO: task syz-executor.0:4188 blocked for more than 143 seconds.
Not tainted 5.19.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:29824 pid: 4188 ppid: 4074 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0x9cd/0x4b20 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
rwsem_down_write_slowpath+0x68a/0x11a0 kernel/locking/rwsem.c:1172
__down_write_common kernel/locking/rwsem.c:1287 [inline]
__down_write_common kernel/locking/rwsem.c:1284 [inline]
__down_write kernel/locking/rwsem.c:1296 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1543
inode_lock include/linux/fs.h:741 [inline]
chown_common+0x32b/0x5e0 fs/open.c:701
do_fchownat+0xcf/0x140 fs/open.c:735
__do_sys_chown fs/open.c:755 [inline]
__se_sys_chown fs/open.c:753 [inline]
__x64_sys_chown+0x72/0xb0 fs/open.c:753
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f1b6fc89049
RSP: 002b:00007f1b6f3fe168 EFLAGS: 00000246 ORIG_RAX: 000000000000005c
RAX: ffffffffffffffda RBX: 00007f1b6fd9c030 RCX: 00007f1b6fc89049
RDX: 000000000000ee00 RSI: 000000000000ee00 RDI: 0000000020000040
RBP: 00007f1b6fce308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd37bdcdef R14: 00007f1b6f3fe300 R15: 0000000000022000
INFO: task syz-executor.1:4189 blocked for more than 144 seconds.
Not tainted 5.19.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:29824 pid: 4189 ppid: 4070 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0x9cd/0x4b20 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
rwsem_down_write_slowpath+0x68a/0x11a0 kernel/locking/rwsem.c:1172
__down_write_common kernel/locking/rwsem.c:1287 [inline]
__down_write_common kernel/locking/rwsem.c:1284 [inline]
__down_write kernel/locking/rwsem.c:1296 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1543
inode_lock include/linux/fs.h:741 [inline]
chown_common+0x32b/0x5e0 fs/open.c:701
do_fchownat+0xcf/0x140 fs/open.c:735
__do_sys_chown fs/open.c:755 [inline]
__se_sys_chown fs/open.c:753 [inline]
__x64_sys_chown+0x72/0xb0 fs/open.c:753
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f99dce89049
RSP: 002b:00007f99ddfe0168 EFLAGS: 00000246 ORIG_RAX: 000000000000005c
RAX: ffffffffffffffda RBX: 00007f99dcf9c030 RCX: 00007f99dce89049
RDX: 000000000000ee00 RSI: 000000000000ee00 RDI: 0000000020000040
RBP: 00007f99dcee308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc0cfae03f R14: 00007f99ddfe0300 R15: 0000000000022000
INFO: task syz-executor.5:4193 blocked for more than 145 seconds.
Not tainted 5.19.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:29400 pid: 4193 ppid: 4077 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0x9cd/0x4b20 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
rwsem_down_write_slowpath+0x68a/0x11a0 kernel/locking/rwsem.c:1172
__down_write_common kernel/locking/rwsem.c:1287 [inline]
__down_write_common kernel/locking/rwsem.c:1284 [inline]
__down_write kernel/locking/rwsem.c:1296 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1543
inode_lock include/linux/fs.h:741 [inline]
chown_common+0x32b/0x5e0 fs/open.c:701
do_fchownat+0xcf/0x140 fs/open.c:735
__do_sys_chown fs/open.c:755 [inline]
__se_sys_chown fs/open.c:753 [inline]
__x64_sys_chown+0x72/0xb0 fs/open.c:753
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f6427889049
RSP: 002b:00007f6428a9f168 EFLAGS: 00000246 ORIG_RAX: 000000000000005c
RAX: ffffffffffffffda RBX: 00007f642799c030 RCX: 00007f6427889049
RDX: 000000000000ee00 RSI: 000000000000ee00 RDI: 0000000020000040
RBP: 00007f64278e308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcbce8f33f R14: 00007f6428a9f300 R15: 0000000000022000
INFO: task syz-executor.2:4201 blocked for more than 146 seconds.
Not tainted 5.19.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:29648 pid: 4201 ppid: 4069 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0x9cd/0x4b20 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
rwsem_down_write_slowpath+0x68a/0x11a0 kernel/locking/rwsem.c:1172
__down_write_common kernel/locking/rwsem.c:1287 [inline]
__down_write_common kernel/locking/rwsem.c:1284 [inline]
__down_write kernel/locking/rwsem.c:1296 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1543
inode_lock include/linux/fs.h:741 [inline]
chown_common+0x32b/0x5e0 fs/open.c:701
do_fchownat+0xcf/0x140 fs/open.c:735
__do_sys_chown fs/open.c:755 [inline]
__se_sys_chown fs/open.c:753 [inline]
__x64_sys_chown+0x72/0xb0 fs/open.c:753
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f2568289049
RSP: 002b:00007f2569346168 EFLAGS: 00000246 ORIG_RAX: 000000000000005c
RAX: ffffffffffffffda RBX: 00007f256839c030 RCX: 00007f2568289049
RDX: 000000000000ee00 RSI: 000000000000ee00 RDI: 0000000020000040
RBP: 00007f25682e308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffa63d571f R14: 00007f2569346300 R15: 0000000000022000
INFO: task syz-executor.4:4202 blocked for more than 147 seconds.
Not tainted 5.19.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:29776 pid: 4202 ppid: 4073 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0x9cd/0x4b20 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
rwsem_down_write_slowpath+0x68a/0x11a0 kernel/locking/rwsem.c:1172
__down_write_common kernel/locking/rwsem.c:1287 [inline]
__down_write_common kernel/locking/rwsem.c:1284 [inline]
__down_write kernel/locking/rwsem.c:1296 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1543
inode_lock include/linux/fs.h:741 [inline]
chown_common+0x32b/0x5e0 fs/open.c:701
do_fchownat+0xcf/0x140 fs/open.c:735
__do_sys_chown fs/open.c:755 [inline]
__se_sys_chown fs/open.c:753 [inline]
__x64_sys_chown+0x72/0xb0 fs/open.c:753
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f04f6c89049
RSP: 002b:00007f04f7e4a168 EFLAGS: 00000246 ORIG_RAX: 000000000000005c
RAX: ffffffffffffffda RBX: 00007f04f6d9c030 RCX: 00007f04f6c89049
RDX: 000000000000ee00 RSI: 000000000000ee00 RDI: 0000000020000040
RBP: 00007f04f6ce308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd2352cc9f R14: 00007f04f7e4a300 R15: 0000000000022000
INFO: task syz-executor.3:4206 blocked for more than 148 seconds.
Not tainted 5.19.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:29824 pid: 4206 ppid: 4075 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0x9cd/0x4b20 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
rwsem_down_write_slowpath+0x68a/0x11a0 kernel/locking/rwsem.c:1172
__down_write_common kernel/locking/rwsem.c:1287 [inline]
__down_write_common kernel/locking/rwsem.c:1284 [inline]
__down_write kernel/locking/rwsem.c:1296 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1543
inode_lock include/linux/fs.h:741 [inline]
chown_common+0x32b/0x5e0 fs/open.c:701
do_fchownat+0xcf/0x140 fs/open.c:735
__do_sys_chown fs/open.c:755 [inline]
__se_sys_chown fs/open.c:753 [inline]
__x64_sys_chown+0x72/0xb0 fs/open.c:753
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f796ca89049
RSP: 002b:00007f796db85168 EFLAGS: 00000246 ORIG_RAX: 000000000000005c
RAX: ffffffffffffffda RBX: 00007f796cb9c030 RCX: 00007f796ca89049
RDX: 000000000000ee00 RSI: 000000000000ee00 RDI: 0000000020000040
RBP: 00007f796cae308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe905ec82f R14: 00007f796db85300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by ksoftirqd/0/15:
1 lock held by khungtaskd/27:
#0: ffffffff8ad7b4e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491
2 locks held by getty/3280:
#0: ffff88814a99d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900029162e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xb14/0x1040 drivers/tty/n_tty.c:2124
2 locks held by kworker/0:6/3642:
#0: ffff8880b9e39e18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:544
#1: ffff8880b9e277c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3e7/0x4e0 kernel/sched/psi.c:889
2 locks held by syz-executor.0/4186:
2 locks held by syz-executor.0/4188:
#0: ffff88807dd02460 (sb_writers#14){.+.+}-{0:0}, at: do_fchownat+0xb8/0x140 fs/open.c:732
#1: ffff88806a430150 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: inode_lock include/linux/fs.h:741 [inline]
#1: ffff88806a430150 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: chown_common+0x32b/0x5e0 fs/open.c:701
2 locks held by syz-executor.1/4187:
2 locks held by syz-executor.1/4189:
#0: ffff888024cfe460 (sb_writers#14){.+.+}-{0:0}, at: do_fchownat+0xb8/0x140 fs/open.c:732
#1: ffff88806a430728 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: inode_lock include/linux/fs.h:741 [inline]
#1: ffff88806a430728 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: chown_common+0x32b/0x5e0 fs/open.c:701
2 locks held by syz-executor.5/4191:
2 locks held by syz-executor.5/4193:
#0: ffff88807d4e4460 (sb_writers#14){.+.+}-{0:0}, at: do_fchownat+0xb8/0x140 fs/open.c:732
#1: ffff88806a430d00 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: inode_lock include/linux/fs.h:741 [inline]
#1: ffff88806a430d00 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: chown_common+0x32b/0x5e0 fs/open.c:701
2 locks held by syz-executor.2/4197:
#0: ffff88807b39b9e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x96/0xb0 fs/file.c:1036
#1: ffff88806f270728 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: iterate_dir+0xad/0x6c0 fs/readdir.c:55
2 locks held by syz-executor.2/4201:
#0: ffff888076b7e460 (sb_writers#14){.+.+}-{0:0}, at: do_fchownat+0xb8/0x140 fs/open.c:732
#1: ffff88806f270728 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: inode_lock include/linux/fs.h:741 [inline]
#1: ffff88806f270728 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: chown_common+0x32b/0x5e0 fs/open.c:701
2 locks held by syz-executor.4/4199:
#0: ffff888075ea1768 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x96/0xb0 fs/file.c:1036
#1: ffff88806f270d00 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: iterate_dir+0xad/0x6c0 fs/readdir.c:55
2 locks held by syz-executor.4/4202:
#0: ffff88806b36a460 (sb_writers#14){.+.+}-{0:0}, at: do_fchownat+0xb8/0x140 fs/open.c:732
#1: ffff88806f270d00 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: inode_lock include/linux/fs.h:741 [inline]
#1: ffff88806f270d00 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: chown_common+0x32b/0x5e0 fs/open.c:701
2 locks held by syz-executor.3/4205:
#0: ffff8880218ee368 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x96/0xb0 fs/file.c:1036
#1: ffff88806f2712d8 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: iterate_dir+0xad/0x6c0 fs/readdir.c:55
2 locks held by syz-executor.3/4206:
#0: ffff88807da6a460 (sb_writers#14){.+.+}-{0:0}, at: do_fchownat+0xb8/0x140 fs/open.c:732
#1: ffff88806f2712d8 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: inode_lock include/linux/fs.h:741 [inline]
#1: ffff88806f2712d8 (&sb->s_type->i_mutex_key#21){++++}-{3:3}, at: chown_common+0x32b/0x5e0 fs/open.c:701
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.19.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x18f/0x1d0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0x88c/0xbf0 kernel/hung_task.c:369
kthread+0x299/0x340 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 918 Comm: kworker/0:2 Not tainted 5.19.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Workqueue: events p9_read_work
RIP: 0010:cfs_rq_of kernel/sched/sched.h:1374 [inline]
RIP: 0010:__clear_buddies_next kernel/sched/fair.c:4397 [inline]
RIP: 0010:clear_buddies+0xdf/0x3e0 kernel/sched/fair.c:4422
Code: 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 84 02 00 00 48 8b 5b 70 48 85 db 74 36 48 8d 7b 78 48 89 f8 48 c1 e8 03 42 80 3c 28 00 <0f> 85 0b 02 00 00 48 8b 6b 78 48 8d 7d 58 48 89 f8 48 c1 e8 03 42
RSP: 0018:ffffc900046f79b0 EFLAGS: 00000046
RAX: 1ffff1100d73af0f RBX: ffff88806b9d7800 RCX: 1ffff110037ed02a
RDX: 1ffff110173c73e3 RSI: ffff88806b9d7800 RDI: ffff88806b9d7878
RBP: ffff8880b9e39ec0 R08: ffff8880b9e39ec0 R09: 0000000000000001
R10: 0000000000000002 R11: 0000000000000001 R12: ffff8880b9e39ec0
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88806b9d7800
FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005613ac1a9600 CR3: 0000000016588000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
set_next_entity+0x19/0x5e0 kernel/sched/fair.c:4525
pick_next_task_fair+0x6ad/0xe20 kernel/sched/fair.c:7318
__pick_next_task kernel/sched/core.c:5768 [inline]
pick_next_task kernel/sched/core.c:5843 [inline]
__schedule+0x3af/0x4b20 kernel/sched/core.c:6422
preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6623
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x36/0x40 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:389 [inline]
p9_read_work+0x8f8/0x11c0 net/9p/trans_fd.c:377
process_one_work+0x841/0x13a0 kernel/workqueue.c:2289
worker_thread+0x598/0xec0 kernel/workqueue.c:2436
kthread+0x299/0x340 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302