INFO: task syz-executor.0:8705 blocked for more than 143 seconds.
Not tainted 5.13.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:24816 pid: 8705 ppid: 8412 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4339 [inline]
__schedule+0xb98/0x1120 kernel/sched/core.c:5147
schedule+0x14b/0x200 kernel/sched/core.c:5226
schedule_timeout+0x98/0x2c0 kernel/time/timer.c:1868
do_wait_for_common+0x2dd/0x450 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x48/0x60 kernel/sched/completion.c:138
__flush_work kernel/workqueue.c:3052 [inline]
__cancel_work_timer+0x4dc/0x690 kernel/workqueue.c:3139
p9_conn_destroy net/9p/trans_fd.c:891 [inline]
p9_fd_close+0x2a2/0x3c0 net/9p/trans_fd.c:921
p9_client_create+0xa28/0xf80 net/9p/client.c:1071
v9fs_session_init+0x1e6/0x18c0 fs/9p/v9fs.c:406
v9fs_mount+0x72/0x870 fs/9p/vfs_super.c:126
legacy_get_tree+0xea/0x180 fs/fs_context.c:592
vfs_get_tree+0x86/0x270 fs/super.c:1498
do_new_mount fs/namespace.c:2905 [inline]
path_mount+0x196f/0x2be0 fs/namespace.c:3235
do_mount fs/namespace.c:3248 [inline]
__do_sys_mount fs/namespace.c:3456 [inline]
__se_sys_mount+0x2f9/0x3b0 fs/namespace.c:3433
do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007fdfbf0b0188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000056c158 RCX: 00000000004665d9
RDX: 0000000020000240 RSI: 0000000020000200 RDI: 0000000000000000
RBP: 00000000004bfcb9 R08: 0000000020000580 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c158
R13: 00007ffcc27a60cf R14: 00007fdfbf0b0300 R15: 0000000000022000
Showing all locks held in the system:
2 locks held by kworker/0:0/5:
#0: ffff888011864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7aa/0x10c0 kernel/workqueue.c:2248
#1: ffffc90000ca7d20 ((work_completion)(&m->wq)){+.+.}-{0:0}, at: process_one_work+0x7e8/0x10c0 kernel/workqueue.c:2250
1 lock held by khungtaskd/1627:
#0: ffffffff8cf15c40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1627 Comm: khungtaskd Not tainted 5.13.0-rc2-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:313
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4844 Comm: systemd-journal Not tainted 5.13.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__sanitizer_cov_trace_cmp4+0x0/0xa0 kernel/kcov.c:258
Code: 54 f9 08 48 c1 e0 03 48 83 c8 18 48 89 34 01 4c 89 44 f9 18 49 ff c2 4c 89 11 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <4c> 8b 04 24 65 48 8b 14 25 80 ef 01 00 65 8b 05 e4 ea 82 7e a9 00
RSP: 0018:ffffc900014ffa58 EFLAGS: 00000246
RAX: 1ffff11003ee1300 RBX: 0000000000000002 RCX: 0000000000000000
RDX: 0000000000000010 RSI: 0000000000000002 RDI: 0000000000000002
RBP: 0000000000000002 R08: dffffc0000000000 R09: fffff5200029ff7a
R10: fffff5200029ff7a R11: 0000000000000000 R12: dffffc0000000000
R13: ffffc900014ffbfc R14: 1ffff9200029ff7f R15: ffffc900014ffbf8
FS: 00007f49c4dd68c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f49c21b6020 CR3: 0000000022ee2000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do___read_seqcount_retry include/linux/seqlock.h:433 [inline]
do_read_seqcount_retry include/linux/seqlock.h:453 [inline]
nd_jump_root+0x24c/0x440 fs/namei.c:943
path_init+0x354/0x11d0 fs/namei.c:2331
path_parentat fs/namei.c:2472 [inline]
filename_parentat+0x215/0x1170 fs/namei.c:2495
filename_create+0xbf/0x700 fs/namei.c:3575
user_path_create fs/namei.c:3650 [inline]
do_mkdirat+0xaf/0x3e0 fs/namei.c:3828
do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f49c4091687
Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffc42b32d98 EFLAGS: 00000293 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ffc42b35cb0 RCX: 00007f49c4091687
RDX: 00007f49c4b02a00 RSI: 00000000000001ed RDI: 000055e37380c8a0
RBP: 00007ffc42b32dd0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffc42b35cb0 R15: 00007ffc42b332c0