INFO: task syz-executor.4:19268 blocked for more than 143 seconds.
Not tainted 5.12.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:26928 pid:19268 ppid: 8418 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4322 [inline]
__schedule+0xa4d/0xf80 kernel/sched/core.c:5073
schedule+0x14b/0x200 kernel/sched/core.c:5152
rwsem_down_write_slowpath+0xe52/0x1590 kernel/locking/rwsem.c:1106
__down_write_common kernel/locking/rwsem.c:1261 [inline]
__down_write kernel/locking/rwsem.c:1270 [inline]
down_write+0x165/0x170 kernel/locking/rwsem.c:1407
inode_lock include/linux/fs.h:775 [inline]
open_last_lookups fs/namei.c:3288 [inline]
path_openat+0x7eb/0x39b0 fs/namei.c:3497
do_filp_open+0x221/0x460 fs/namei.c:3527
do_sys_openat2+0x124/0x460 fs/open.c:1187
do_sys_open fs/open.c:1203 [inline]
__do_sys_open fs/open.c:1211 [inline]
__se_sys_open fs/open.c:1207 [inline]
__x64_sys_open+0x221/0x270 fs/open.c:1207
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
RSP: 002b:00007f5f19d2d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000141042 RDI: 0000000020000140
RBP: 00000000004bfbb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007ffc963db1af R14: 00007f5f19d2d300 R15: 0000000000022000
INFO: task syz-executor.4:19309 blocked for more than 144 seconds.
Not tainted 5.12.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27056 pid:19309 ppid: 8418 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4322 [inline]
__schedule+0xa4d/0xf80 kernel/sched/core.c:5073
schedule+0x14b/0x200 kernel/sched/core.c:5152
rwsem_down_read_slowpath+0x58f/0x9f0 kernel/locking/rwsem.c:992
__down_read_common+0xaa/0x450 kernel/locking/rwsem.c:1213
inode_lock_shared include/linux/fs.h:785 [inline]
lookup_slow fs/namei.c:1646 [inline]
walk_component+0x4c8/0x740 fs/namei.c:1943
lookup_last fs/namei.c:2398 [inline]
path_lookupat+0x19d/0x9d0 fs/namei.c:2422
filename_lookup+0x259/0x6e0 fs/namei.c:2455
user_path_at include/linux/namei.h:60 [inline]
__do_sys_chdir fs/open.c:493 [inline]
__se_sys_chdir+0x95/0x290 fs/open.c:487
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
RSP: 002b:00007f5f19ceb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 000000000056c158 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00000000004bfbb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c158
R13: 00007ffc963db1af R14: 00007f5f19ceb300 R15: 0000000000022000
INFO: task syz-executor.4:19311 blocked for more than 145 seconds.
Not tainted 5.12.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:26960 pid:19311 ppid: 8418 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4322 [inline]
__schedule+0xa4d/0xf80 kernel/sched/core.c:5073
schedule+0x14b/0x200 kernel/sched/core.c:5152
rwsem_down_write_slowpath+0xe52/0x1590 kernel/locking/rwsem.c:1106
__down_write_common kernel/locking/rwsem.c:1261 [inline]
__down_write kernel/locking/rwsem.c:1270 [inline]
down_write+0x165/0x170 kernel/locking/rwsem.c:1407
inode_lock include/linux/fs.h:775 [inline]
open_last_lookups fs/namei.c:3288 [inline]
path_openat+0x7eb/0x39b0 fs/namei.c:3497
do_filp_open+0x221/0x460 fs/namei.c:3527
do_sys_openat2+0x124/0x460 fs/open.c:1187
do_sys_open fs/open.c:1203 [inline]
__do_sys_creat fs/open.c:1277 [inline]
__se_sys_creat fs/open.c:1271 [inline]
__x64_sys_creat+0x11f/0x160 fs/open.c:1271
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
RSP: 002b:00007f5f19cca188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 000000000056c200 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0
RBP: 00000000004bfbb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c200
R13: 00007ffc963db1af R14: 00007f5f19cca300 R15: 0000000000022000
Showing all locks held in the system:
2 locks held by kworker/0:0/5:
#0: ffff8880b9c34c98 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1321 [inline]
#0: ffff8880b9c34c98 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x144/0xf80 kernel/sched/core.c:4990
#1: ffff8880b9c1f808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x224/0x5c0 kernel/sched/psi.c:833
1 lock held by khungtaskd/1610:
#0: ffffffff8cd10280 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151
1 lock held by in:imklog/8078:
#0: ffff888021e75270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:974
1 lock held by systemd-udevd/5408:
#0: ffff8880b9c34c98 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1321 [inline]
#0: ffff8880b9c34c98 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x144/0xf80 kernel/sched/core.c:4990
1 lock held by systemd-udevd/5434:
3 locks held by syz-executor.4/19261:
2 locks held by syz-executor.4/19268:
#0: ffff888151bb6460 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:375
#1: ffff88808497fa90 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline]
#1: ffff88808497fa90 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3288 [inline]
#1: ffff88808497fa90 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7eb/0x39b0 fs/namei.c:3497
1 lock held by syz-executor.4/19309:
#0: ffff88808497fa90 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:785 [inline]
#0: ffff88808497fa90 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1646 [inline]
#0: ffff88808497fa90 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x4c8/0x740 fs/namei.c:1943
2 locks held by syz-executor.4/19311:
#0: ffff888151bb6460 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:375
#1: ffff88808497fa90 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline]
#1: ffff88808497fa90 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3288 [inline]
#1: ffff88808497fa90 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7eb/0x39b0 fs/namei.c:3497
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1610 Comm: khungtaskd Not tainted 5.12.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x202/0x31e lib/dump_stack.c:120
nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
watchdog+0xcfb/0xd40 kernel/hung_task.c:294
kthread+0x39a/0x3c0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4818 Comm: systemd-udevd Not tainted 5.12.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0033:0x55d40f908203
Code: 4c 89 3c 24 48 89 44 24 08 e9 b6 00 00 00 66 0f 1f 84 00 00 00 00 00 45 8b 6e 70 45 85 ed 74 0a 44 3b 6b 70 0f 84 fd 00 00 00 <49> 8b 76 60 4c 8b 63 50 48 85 f6 74 10 4c 89 e7 e8 b8 90 ff ff 85
RSP: 002b:00007ffdb9197f30 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 000055d41006c340 RCX: 0000000000003470
RDX: 0000000000000007 RSI: 000055d4100f8dd0 RDI: 000055d4103d5680
RBP: 0000000000000704 R08: 000000000000001c R09: 000000000000001c
R10: 000000000000001c R11: 00007fb2d6ebb060 R12: 000055d4103d5664
R13: 0000000000000000 R14: 000055d4101aa980 R15: 0000000000014d74
FS: 00007fb2d7fba8c0 GS: 0000000000000000