INFO: task can't die in p9_fd

INFO: task can't die in p9_fd_close
Status: upstream: reported C repro on 2020/08/26 10:38
Reported-by: syzbot+fbe34b643e462f65e542@syzkaller.appspotmail.com
First crash: 631d, last: 21d

Cause bisection: introduced by (bisect log) :
commit af3acca3e35c01920fe476f730dca7345d0a48df
Author: Daniel Baluta <daniel.baluta@nxp.com>
Date: Tue Feb 20 12:53:10 2018 +0000

ASoC: ak5558: Fix style for SPDX identifier

Crash: INFO: task hung in p9_fd_close (log)
Repro: C syz .config

similar bugs (6):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: task hung in p9_fd_close	C	error	error	294	3d16h	989d	0/22	upstream: reported C repro on 2019/08/30 19:28
linux-4.14	INFO: task hung in p9_fd_close	C		inconclusive	58	119d	1008d	0/1	upstream: reported C repro on 2019/08/11 15:06
linux-4.19	INFO: task hung in p9_fd_close	C			99	14d	1000d	0/1	upstream: reported C repro on 2019/08/19 15:52
upstream	INFO: task can't die in ext4_stop_mmpd	C	inconclusive	error	14	43d	206d	0/22	upstream: reported C repro on 2021/10/21 16:18
upstream	INFO: task hung in tls_sk_proto_close	C	done		660	16d	776d	0/22	upstream: reported C repro on 2020/03/30 07:09
upstream	INFO: task hung in __xfs_buf_submit (2)	C	done		6	6d16h	263d	0/22	upstream: reported C repro on 2021/08/25 17:22

Sample crash report:

INFO: task syz-executor295:3767 can't die for more than 143 seconds.
task:syz-executor295 state:D stack:27616 pid: 3767 ppid:  3630 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5000 [inline]
 __schedule+0xab2/0x4db0 kernel/sched/core.c:6309
 schedule+0xd2/0x1f0 kernel/sched/core.c:6381
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
 __flush_work+0x56c/0xb10 kernel/workqueue.c:3075
 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3162
 p9_conn_destroy net/9p/trans_fd.c:884 [inline]
 p9_fd_close+0x29c/0x520 net/9p/trans_fd.c:919
 p9_client_destroy+0xbe/0x370 net/9p/client.c:1089
 v9fs_session_close+0x45/0x2d0 fs/9p/v9fs.c:504
 v9fs_kill_super+0x49/0x90 fs/9p/vfs_super.c:226
 deactivate_locked_super+0x94/0x160 fs/super.c:332
 v9fs_mount+0x69f/0xa80 fs/9p/vfs_super.c:207
 legacy_get_tree+0x105/0x220 fs/fs_context.c:610
 vfs_get_tree+0x89/0x2f0 fs/super.c:1497
 do_new_mount fs/namespace.c:3012 [inline]
 path_mount+0x1320/0x1fa0 fs/namespace.c:3342
 do_mount fs/namespace.c:3355 [inline]
 __do_sys_mount fs/namespace.c:3563 [inline]
 __se_sys_mount fs/namespace.c:3540 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3540
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3ff4a19cc9
RSP: 002b:00007f3ff49cb2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f3ff4aa14c0 RCX: 00007f3ff4a19cc9
RDX: 0000000020000100 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f3ff4aa14cc R08: 0000000020000180 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
R13: 6f6e3d6568636163 R14: 64663d736e617274 R15: 00007f3ff4aa14c8
 </TASK>
INFO: task syz-executor295:3767 blocked for more than 143 seconds.
      Not tainted 5.17.0-rc2-next-20220204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor295 state:D stack:27616 pid: 3767 ppid:  3630 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5000 [inline]
 __schedule+0xab2/0x4db0 kernel/sched/core.c:6309
 schedule+0xd2/0x1f0 kernel/sched/core.c:6381
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
 __flush_work+0x56c/0xb10 kernel/workqueue.c:3075
 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3162
 p9_conn_destroy net/9p/trans_fd.c:884 [inline]
 p9_fd_close+0x29c/0x520 net/9p/trans_fd.c:919
 p9_client_destroy+0xbe/0x370 net/9p/client.c:1089
 v9fs_session_close+0x45/0x2d0 fs/9p/v9fs.c:504
 v9fs_kill_super+0x49/0x90 fs/9p/vfs_super.c:226
 deactivate_locked_super+0x94/0x160 fs/super.c:332
 v9fs_mount+0x69f/0xa80 fs/9p/vfs_super.c:207
 legacy_get_tree+0x105/0x220 fs/fs_context.c:610
 vfs_get_tree+0x89/0x2f0 fs/super.c:1497
 do_new_mount fs/namespace.c:3012 [inline]
 path_mount+0x1320/0x1fa0 fs/namespace.c:3342
 do_mount fs/namespace.c:3355 [inline]
 __do_sys_mount fs/namespace.c:3563 [inline]
 __se_sys_mount fs/namespace.c:3540 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3540
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3ff4a19cc9
RSP: 002b:00007f3ff49cb2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f3ff4aa14c0 RCX: 00007f3ff4a19cc9
RDX: 0000000020000100 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f3ff4aa14cc R08: 0000000020000180 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
R13: 6f6e3d6568636163 R14: 64663d736e617274 R15: 00007f3ff4aa14c8
 </TASK>
INFO: task syz-executor295:3867 can't die for more than 144 seconds.
task:syz-executor295 state:D stack:27528 pid: 3867 ppid:  3629 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5000 [inline]
 __schedule+0xab2/0x4db0 kernel/sched/core.c:6309
 schedule+0xd2/0x1f0 kernel/sched/core.c:6381
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
 __flush_work+0x56c/0xb10 kernel/workqueue.c:3075
 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3162
 p9_conn_destroy net/9p/trans_fd.c:884 [inline]
 p9_fd_close+0x29c/0x520 net/9p/trans_fd.c:919
 p9_client_destroy+0xbe/0x370 net/9p/client.c:1089
 v9fs_session_close+0x45/0x2d0 fs/9p/v9fs.c:504
 v9fs_kill_super+0x49/0x90 fs/9p/vfs_super.c:226
 deactivate_locked_super+0x94/0x160 fs/super.c:332
 v9fs_mount+0x69f/0xa80 fs/9p/vfs_super.c:207
 legacy_get_tree+0x105/0x220 fs/fs_context.c:610
 vfs_get_tree+0x89/0x2f0 fs/super.c:1497
 do_new_mount fs/namespace.c:3012 [inline]
 path_mount+0x1320/0x1fa0 fs/namespace.c:3342
 do_mount fs/namespace.c:3355 [inline]
 __do_sys_mount fs/namespace.c:3563 [inline]
 __se_sys_mount fs/namespace.c:3540 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3540
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3ff4a19cc9
RSP: 002b:00007f3ff49cb2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f3ff4aa14c0 RCX: 00007f3ff4a19cc9
RDX: 0000000020000100 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f3ff4aa14cc R08: 0000000020000180 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
R13: 6f6e3d6568636163 R14: 64663d736e617274 R15: 00007f3ff4aa14c8
 </TASK>
INFO: task syz-executor295:3867 blocked for more than 144 seconds.
      Not tainted 5.17.0-rc2-next-20220204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor295 state:D stack:27528 pid: 3867 ppid:  3629 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5000 [inline]
 __schedule+0xab2/0x4db0 kernel/sched/core.c:6309
 schedule+0xd2/0x1f0 kernel/sched/core.c:6381
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
 __flush_work+0x56c/0xb10 kernel/workqueue.c:3075
 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3162
 p9_conn_destroy net/9p/trans_fd.c:884 [inline]
 p9_fd_close+0x29c/0x520 net/9p/trans_fd.c:919
 p9_client_destroy+0xbe/0x370 net/9p/client.c:1089
 v9fs_session_close+0x45/0x2d0 fs/9p/v9fs.c:504
 v9fs_kill_super+0x49/0x90 fs/9p/vfs_super.c:226
 deactivate_locked_super+0x94/0x160 fs/super.c:332
 v9fs_mount+0x69f/0xa80 fs/9p/vfs_super.c:207
 legacy_get_tree+0x105/0x220 fs/fs_context.c:610
 vfs_get_tree+0x89/0x2f0 fs/super.c:1497
 do_new_mount fs/namespace.c:3012 [inline]
 path_mount+0x1320/0x1fa0 fs/namespace.c:3342
 do_mount fs/namespace.c:3355 [inline]
 __do_sys_mount fs/namespace.c:3563 [inline]
 __se_sys_mount fs/namespace.c:3540 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3540
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3ff4a19cc9
RSP: 002b:00007f3ff49cb2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f3ff4aa14c0 RCX: 00007f3ff4a19cc9
RDX: 0000000020000100 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f3ff4aa14cc R08: 0000000020000180 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
R13: 6f6e3d6568636163 R14: 64663d736e617274 R15: 00007f3ff4aa14c8
 </TASK>
INFO: task syz-executor295:3897 can't die for more than 144 seconds.
task:syz-executor295 state:D stack:27528 pid: 3897 ppid:  3634 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5000 [inline]
 __schedule+0xab2/0x4db0 kernel/sched/core.c:6309
 schedule+0xd2/0x1f0 kernel/sched/core.c:6381
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
 __flush_work+0x56c/0xb10 kernel/workqueue.c:3075
 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3162
 p9_conn_destroy net/9p/trans_fd.c:884 [inline]
 p9_fd_close+0x29c/0x520 net/9p/trans_fd.c:919
 p9_client_destroy+0xbe/0x370 net/9p/client.c:1089
 v9fs_session_close+0x45/0x2d0 fs/9p/v9fs.c:504
 v9fs_kill_super+0x49/0x90 fs/9p/vfs_super.c:226
 deactivate_locked_super+0x94/0x160 fs/super.c:332
 v9fs_mount+0x69f/0xa80 fs/9p/vfs_super.c:207
 legacy_get_tree+0x105/0x220 fs/fs_context.c:610
 vfs_get_tree+0x89/0x2f0 fs/super.c:1497
 do_new_mount fs/namespace.c:3012 [inline]
 path_mount+0x1320/0x1fa0 fs/namespace.c:3342
 do_mount fs/namespace.c:3355 [inline]
 __do_sys_mount fs/namespace.c:3563 [inline]
 __se_sys_mount fs/namespace.c:3540 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3540
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3ff4a19cc9
RSP: 002b:00007f3ff49cb2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f3ff4aa14c0 RCX: 00007f3ff4a19cc9
RDX: 0000000020000100 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f3ff4aa14cc R08: 0000000020000180 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
R13: 6f6e3d6568636163 R14: 64663d736e617274 R15: 00007f3ff4aa14c8
 </TASK>
INFO: task syz-executor295:3897 blocked for more than 145 seconds.
      Not tainted 5.17.0-rc2-next-20220204-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor295 state:D stack:27528 pid: 3897 ppid:  3634 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5000 [inline]
 __schedule+0xab2/0x4db0 kernel/sched/core.c:6309
 schedule+0xd2/0x1f0 kernel/sched/core.c:6381
 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
 __flush_work+0x56c/0xb10 kernel/workqueue.c:3075
 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3162
 p9_conn_destroy net/9p/trans_fd.c:884 [inline]
 p9_fd_close+0x29c/0x520 net/9p/trans_fd.c:919
 p9_client_destroy+0xbe/0x370 net/9p/client.c:1089
 v9fs_session_close+0x45/0x2d0 fs/9p/v9fs.c:504
 v9fs_kill_super+0x49/0x90 fs/9p/vfs_super.c:226
 deactivate_locked_super+0x94/0x160 fs/super.c:332
 v9fs_mount+0x69f/0xa80 fs/9p/vfs_super.c:207
 legacy_get_tree+0x105/0x220 fs/fs_context.c:610
 vfs_get_tree+0x89/0x2f0 fs/super.c:1497
 do_new_mount fs/namespace.c:3012 [inline]
 path_mount+0x1320/0x1fa0 fs/namespace.c:3342
 do_mount fs/namespace.c:3355 [inline]
 __do_sys_mount fs/namespace.c:3563 [inline]
 __se_sys_mount fs/namespace.c:3540 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3540
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3ff4a19cc9
RSP: 002b:00007f3ff49cb2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f3ff4aa14c0 RCX: 00007f3ff4a19cc9
RDX: 0000000020000100 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f3ff4aa14cc R08: 0000000020000180 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
R13: 6f6e3d6568636163 R14: 64663d736e617274 R15: 00007f3ff4aa14c8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/26:
 #0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6463
2 locks held by kworker/0:2/140:
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
 #1: ffffc9000280fda8 ((work_completion)(&m->rq)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
2 locks held by getty/3271:
 #0: ffff88814ab47098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc90002b662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
2 locks held by kworker/0:0/3649:
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
 #1: ffffc9000287fda8 ((work_completion)(&m->rq)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
2 locks held by kworker/0:3/3667:
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
 #1: ffffc9000291fda8 ((work_completion)(&m->rq)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
2 locks held by kworker/1:1/3671:
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
 #1: ffffc9000294fda8 ((work_completion)(&m->rq)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
2 locks held by kworker/1:3/3690:
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
 #1: ffffc900029cfda8 ((work_completion)(&m->rq)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
2 locks held by kworker/1:4/3832:
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
 #1: ffffc90002c9fda8 ((work_completion)(&m->rq)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.17.0-rc2-next-20220204-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:256 [inline]
 watchdog+0xcb7/0xed0 kernel/hung_task.c:413
 kthread+0x2e9/0x3a0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10 Comm: kworker/u4:1 Not tainted 5.17.0-rc2-next-20220204-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:85 [inline]
RIP: 0010:lock_is_held_type+0x14/0x140 kernel/locking/lockdep.c:5675
Code: 27 bc ff 0f 0b 8b 44 24 04 eb bd 66 66 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 41 55 41 bd ff ff ff ff 41 54 55 53 48 83 ec 08 <8b> 0d 72 70 3d 04 85 c9 0f 84 d9 00 00 00 65 8b 05 97 11 ab 76 85
RSP: 0018:ffffc90000cf7930 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff81356771
RDX: 0000000000000003 RSI: 00000000ffffffff RDI: ffffffff8bb839a0
RBP: ffffffff8bcb7b80 R08: 0000000000000000 R09: ffffffff8d94a4d7
R10: fffffbfff1b2949a R11: 000000000000003f R12: 0000000000000001
R13: 00000000ffffffff R14: 0000000000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3ff4a6eea8 CR3: 000000000b88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_is_held include/linux/lockdep.h:283 [inline]
 rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
 trace_tlb_flush include/trace/events/tlb.h:38 [inline]
 trace_tlb_flush+0x126/0x1b0 include/trace/events/tlb.h:38
 switch_mm_irqs_off+0x4a4/0xa10 arch/x86/mm/tlb.c:629
 unuse_temporary_mm arch/x86/kernel/alternative.c:946 [inline]
 __text_poke+0x544/0x8c0 arch/x86/kernel/alternative.c:1042
 text_poke_bp_batch+0x2c3/0x4e0 arch/x86/kernel/alternative.c:1313
 text_poke_flush arch/x86/kernel/alternative.c:1470 [inline]
 text_poke_flush arch/x86/kernel/alternative.c:1467 [inline]
 text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1477
 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
 jump_label_update+0x1da/0x400 kernel/jump_label.c:830
 static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177
 static_key_enable+0x16/0x20 kernel/jump_label.c:190
 toggle_allocation_gate mm/kfence/core.c:734 [inline]
 toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:726
 process_one_work+0x996/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e9/0x3a0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.281 msecs
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	bc ff 0f 0b 8b       	mov    $0x8b0b0fff,%esp
   5:	44 24 04             	rex.R and $0x4,%al
   8:	eb bd                	jmp    0xffffffc7
   a:	66 66 2e 0f 1f 84 00 	data16 nopw %cs:0x0(%rax,%rax,1)
  11:	00 00 00 00
  15:	41 57                	push   %r15
  17:	41 56                	push   %r14
  19:	41 55                	push   %r13
  1b:	41 bd ff ff ff ff    	mov    $0xffffffff,%r13d
  21:	41 54                	push   %r12
  23:	55                   	push   %rbp
  24:	53                   	push   %rbx
  25:	48 83 ec 08          	sub    $0x8,%rsp
* 29:	8b 0d 72 70 3d 04    	mov    0x43d7072(%rip),%ecx        # 0x43d70a1 <-- trapping instruction
  2f:	85 c9                	test   %ecx,%ecx
  31:	0f 84 d9 00 00 00    	je     0x110
  37:	65 8b 05 97 11 ab 76 	mov    %gs:0x76ab1197(%rip),%eax        # 0x76ab11d5
  3e:	85                   	.byte 0x85

Crashes (58):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-linux-next-kasan-gce-root	2022/02/13 14:53	linux-next	ef6b35306dd8	8b9ca619	.config	log	report	syz	C		INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/08/10 07:47	linux-next	da454ebf578f	6972b106	.config	log	report	syz	C		INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2022/04/21 14:16	linux-next	f1244c81da13	d4befee1	.config	log	report	syz	C		INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2022/04/18 07:50	linux-next	40354149f4d7	8bcc32a6	.config	log	report	syz	C		INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2022/04/02 19:52	linux-next	e5071887cd22	79a2a8fc	.config	log	report	syz	C		INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2022/03/25 08:01	linux-next	dd315b580061	89bc8608	.config	log	report	syz	C		INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2022/03/06 20:26	linux-next	91265a6da44d	7bdd8b2c	.config	log	report	syz	C		INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2022/03/05 12:32	linux-next	91265a6da44d	45a13a73	.config	log	report	syz	C		INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2022/03/04 16:16	linux-next	91265a6da44d	45a13a73	.config	log	report	syz	C		INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2022/03/04 13:14	linux-next	91265a6da44d	45a13a73	.config	log	report	syz	C		INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2022/03/03 17:17	linux-next	91265a6da44d	45a13a73	.config	log	report	syz	C		INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2020/08/22 10:34	linux-next	494d311a82bb	6436ce4b	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2021/08/01 15:45	linux-next	8d4b477da1a8	6c236867	.config	log	report	syz			INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/06/21 19:58	linux-next	a1f92694393a	aba2b2fb	.config	log	report	syz			INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/06/21 10:11	linux-next	a1f92694393a	aba2b2fb	.config	log	report	syz			INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/06/14 05:15	linux-next	a1f92694393a	1ba81399	.config	log	report	syz			INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2022/04/24 20:54	linux-next	f1244c81da13	131df97d	.config	log	report	syz			INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2022/02/13 07:16	linux-next	ef6b35306dd8	8b9ca619	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/12/04 06:53	linux-next	f81e94e91878	a617004c	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/10/09 12:49	linux-next	683f29b781ae	838e7e2c	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/10/08 03:54	linux-next	f8dc23b3dc0c	efe0f24d	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/10/06 19:51	linux-next	0dda5ee37364	62ee0987	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/10/05 15:24	linux-next	29616f67fcbd	0a63fd36	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/09/25 16:28	linux-next	5a5d008887b4	8cac236e	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/09/15 06:54	linux-next	70ced02f322f	07e953c1	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/09/10 15:43	linux-next	aa14a3016182	5ae8508a	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/08/28 18:41	linux-next	5e63226c7228	be2c130d	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/08/20 15:16	linux-next	86ed57fd8c93	b599f2fc	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/08/09 19:15	linux-next	da454ebf578f	6972b106	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/08/04 03:27	linux-next	8d4b477da1a8	6c236867	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/07/30 13:58	linux-next	4ccc9e2db7ac	c585c7b0	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/07/09 05:17	linux-next	e2f74b13dbe6	1b20171a	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/06/19 20:17	linux-next	a1f92694393a	aba2b2fb	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/05/20 16:04	linux-next	a1f92694393a	c560a65d	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/05/18 16:08	linux-next	a1f92694393a	a343ba6b	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/05/11 14:47	linux-next	4bf27b1f7330	ca873091	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/04/21 04:47	linux-next	1216f02e46a4	c0ced557	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/04/13 16:02	linux-next	dcf1b51d6b2a	bfeda1b1	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/04/13 08:42	linux-next	5df924d19629	bfeda1b1	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/04/03 10:22	linux-next	454c576c3f5e	6a81331a	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/04/01 17:53	linux-next	454c576c3f5e	6a81331a	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/03/22 15:32	linux-next	e3128d2f068e	bea32f74	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2021/02/24 16:30	linux-next	577c283560fe	fcc6d71b	.config	log	report			info	INFO: task can't die in p9_fd_close
ci-upstream-linux-next-kasan-gce-root	2022/04/24 15:15	linux-next	f1244c81da13	131df97d	.config	log	report			info	INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2022/03/20 14:02	linux-next	91265a6da44d	e2d91b1d	.config	log	report			info	INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2022/03/05 05:18	linux-next	91265a6da44d	45a13a73	.config	log	report			info	INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2022/03/01 22:28	linux-next	e6ada6df471f	45a13a73	.config	log	report			info	INFO: task can't die in __wait_for_common
ci-upstream-linux-next-kasan-gce-root	2021/01/14 01:52	linux-next	aa515cdce7a1	269d24e8	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2021/01/13 14:10	linux-next	aa515cdce7a1	a945f0a3	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2021/01/12 23:15	linux-next	df869cab4b35	0cdd6185	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2021/01/11 04:12	linux-next	1c925d2030af	2c1f2513	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2021/01/03 06:42	linux-next	d7a03a44a5e9	79264ae3	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2021/01/02 16:16	linux-next	d7a03a44a5e9	79264ae3	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/12/13 18:01	linux-next	14240d4c5b25	bca53db9	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/12/08 12:06	linux-next	15ac8fdb7440	51a9082e	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/12/06 14:44	linux-next	0eedceafd3a6	f12ba0c5	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/11/29 20:10	linux-next	6174f05255e6	a0092f9d	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/11/22 08:18	linux-next	95065cb54210	0d27f508	.config	log	report			info