bisecting fixing commit since ba31f97d43be41ca99ab72a6131d7c226306865f
building syzkaller on 2489ab887a86e8b1b253aef742e365a606db3a4f
testing commit ba31f97d43be41ca99ab72a6131d7c226306865f
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: b8549c5cbcd09fb35c7393460a529d0bda4c1a67ac6ca8d8e58802e66fe0862f
run #0: crashed: INFO: task hung in paste_selection
run #1: crashed: INFO: task hung in paste_selection
run #2: crashed: INFO: task hung in paste_selection
run #3: crashed: INFO: task hung in paste_selection
run #4: crashed: INFO: task hung in paste_selection
run #5: crashed: INFO: task hung in paste_selection
run #6: crashed: INFO: task hung in paste_selection
run #7: crashed: INFO: task hung in paste_selection
run #8: crashed: INFO: task hung in paste_selection
run #9: crashed: INFO: task hung in paste_selection
run #10: crashed: INFO: task hung in paste_selection
run #11: crashed: INFO: task hung in paste_selection
run #12: crashed: INFO: task hung in paste_selection
run #13: crashed: INFO: task hung in tty_ldisc_hangup
run #14: crashed: INFO: task hung in tty_ldisc_hangup
run #15: crashed: INFO: task hung in paste_selection
run #16: crashed: INFO: task hung in paste_selection
run #17: crashed: INFO: task hung in tty_ldisc_hangup
run #18: crashed: INFO: task hung in paste_selection
run #19: crashed: INFO: task hung in tty_ldisc_hangup
testing current HEAD 0fcfb00b28c0b7884635dacf38e46d60bf3d4eb1
testing commit 0fcfb00b28c0b7884635dacf38e46d60bf3d4eb1
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 1fd650b61f95fe2057177c8f32a2fa705c944610dd385264b24001a21e1e19e6
run #0: crashed: INFO: task hung in tty_ioctl
run #1: crashed: INFO: task hung in tty_ioctl
run #2: crashed: INFO: task hung in tty_ioctl
run #3: crashed: INFO: task hung in tty_ioctl
run #4: crashed: INFO: task hung in tty_ioctl
run #5: crashed: INFO: task hung in tty_ldisc_hangup
run #6: crashed: INFO: task hung in tty_ioctl
run #7: crashed: INFO: task hung in tty_ioctl
run #8: OK
run #9: OK
revisions tested: 2, total time: 31m14.636794653s (build: 13m21.638815474s, test: 17m15.089385628s)
the crash still happens on HEAD
commit msg: Linux 5.16-rc4
crash: INFO: task hung in tty_ioctl
INFO: task agetty:6510 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:agetty state:D stack:26792 pid: 6510 ppid: 1 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
tiocsti drivers/tty/tty_io.c:2308 [inline]
tty_ioctl+0x80b/0x12d0 drivers/tty/tty_io.c:2719
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860
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: 0033:0x7f71ae59a017
RSP: 002b:00007fff55e74cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fff55e74e71 RCX: 00007f71ae59a017
RDX: 00007fff55e74e70 RSI: 0000000000005412 RDI: 0000000000000000
RBP: 00007fff55e74f80 R08: ffffffffffffff98 R09: 00007fff55e74d70
R10: 0000000000000000 R11: 0000000000000206 R12: 00007fff55e74d14
R13: 00007fff55e74e70 R14: 00007fff55e74d70 R15: 0000000000000000
INFO: task syz-executor.1:11580 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27800 pid:11580 ppid: 9649 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762
tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860
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: 0033:0x4665e9
RSP: 002b:00007f91dcdd5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fffaea994cf R14: 00007f91dcdd5300 R15: 0000000000022000
INFO: task syz-executor.3:11585 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28536 pid:11585 ppid: 11216 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762
tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860
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: 0033:0x4665e9
RSP: 002b:00007fafa591b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff6d2e07af R14: 00007fafa591b300 R15: 0000000000022000
INFO: task syz-executor.1:11607 blocked for more than 144 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:28416 pid:11607 ppid: 9649 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762
tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860
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: 0033:0x4665e9
RSP: 002b:00007f91dcdd5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fffaea994cf R14: 00007f91dcdd5300 R15: 0000000000022000
INFO: task syz-executor.3:11619 blocked for more than 144 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27696 pid:11619 ppid: 11216 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762
tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860
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: 0033:0x4665e9
RSP: 002b:00007fafa591b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff6d2e07af R14: 00007fafa591b300 R15: 0000000000022000
INFO: task syz-executor.0:11620 blocked for more than 144 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28416 pid:11620 ppid: 9657 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762
tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860
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: 0033:0x4665e9
RSP: 002b:00007f7071fdf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe83a1cb4f R14: 00007f7071fdf300 R15: 0000000000022000
INFO: task syz-executor.4:11624 blocked for more than 144 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28416 pid:11624 ppid: 10859 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762
tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860
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: 0033:0x4665e9
RSP: 002b:00007f4d732ed188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe0b77fb6f R14: 00007f4d732ed300 R15: 0000000000022000
INFO: task syz-executor.2:11628 blocked for more than 144 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28416 pid:11628 ppid: 9659 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762
tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860
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: 0033:0x4665e9
RSP: 002b:00007f7223b2a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff76ced4ff R14: 00007f7223b2a300 R15: 0000000000022000
INFO: task syz-executor.3:11644 blocked for more than 145 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28416 pid:11644 ppid: 11216 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762
tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860
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: 0033:0x4665e9
RSP: 002b:00007fafa591b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff6d2e07af R14: 00007fafa591b300 R15: 0000000000022000
INFO: task syz-executor.2:11659 blocked for more than 145 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28416 pid:11659 ppid: 9659 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0x90d/0x26c0 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762
tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860
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: 0033:0x4665e9
RSP: 002b:00007f7223b2a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff76ced4ff R14: 00007f7223b2a300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8ab78a80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6280:
#0: ffff888017a434f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x9c/0xb0 fs/file.c:994
2 locks held by agetty/6510:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: tiocsti drivers/tty/tty_io.c:2308 [inline]
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: tty_ioctl+0x80b/0x12d0 drivers/tty/tty_io.c:2719
2 locks held by syz-executor.1/11580:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.4/11583:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.3/11585:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.1/11607:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.3/11619:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.0/11620:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.4/11624:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.2/11628:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.3/11644:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.2/11659:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.4/11654:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.3/11663:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.1/11672:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.3/11664:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.5/12061:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
2 locks held by syz-executor.5/12062:
#0: ffff88801d521098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88800fc790b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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+0x11f/0x170 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0x88c/0xbf0 kernel/hung_task.c:295
kthread+0x3ab/0x480 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3001 Comm: systemd-journal Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:unwind_next_frame+0xba/0x1ce0 arch/x86/kernel/unwind_orc.c:634
Code: 48 c7 04 13 00 00 00 00 48 8b 8c 24 98 00 00 00 65 48 2b 0c 25 28 00 00 00 0f 85 53 15 00 00 48 81 c4 a0 00 00 00 5b 5d 41 5c <41> 5d 41 5e 41 5f c3 4d 8d 66 48 48 b8 00 00 00 00 00 fc ff df 4c
RSP: 0018:ffffc9000b817b10 EFLAGS: 00000282
RAX: 0000000000000001 RBX: ffffffff815ba910 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffc9000b817ef0 RDI: 0000000000000001
RBP: ffffc9000b817bb8 R08: ffffffff8d0a8e4c R09: 0000000000000001
R10: fffff52001702f71 R11: 000000000007a08a R12: ffffc9000b817be8
R13: ffffc9000b817b65 R14: ffffc9000b817b30 R15: ffffc9000b817b64
FS: 00007f14f6dbf8c0(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f14f42a9000 CR3: 000000007ea0b000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x1e/0x50 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:259 [inline]
slab_post_alloc_hook mm/slab.h:519 [inline]
slab_alloc_node mm/slub.c:3234 [inline]
slab_alloc mm/slub.c:3242 [inline]
kmem_cache_alloc+0x202/0x3a0 mm/slub.c:3247
getname_flags.part.0+0x4a/0x440 fs/namei.c:138
getname_flags include/linux/audit.h:323 [inline]
getname fs/namei.c:217 [inline]
__do_sys_mkdir fs/namei.c:3929 [inline]
__se_sys_mkdir fs/namei.c:3927 [inline]
__x64_sys_mkdir+0xc0/0x120 fs/namei.c:3927
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: 0033:0x7f14f607a687
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:00007ffcbc65a588 EFLAGS: 00000293 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ffcbc65d4a0 RCX: 00007f14f607a687
RDX: 00007f14f6aeba00 RSI: 00000000000001ed RDI: 0000563f6b9ed8a0
RBP: 00007ffcbc65a5c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffcbc65d4a0 R15: 00007ffcbc65aab0
----------------
Code disassembly (best guess):
0: 48 c7 04 13 00 00 00 movq $0x0,(%rbx,%rdx,1)
7: 00
8: 48 8b 8c 24 98 00 00 mov 0x98(%rsp),%rcx
f: 00
10: 65 48 2b 0c 25 28 00 sub %gs:0x28,%rcx
17: 00 00
19: 0f 85 53 15 00 00 jne 0x1572
1f: 48 81 c4 a0 00 00 00 add $0xa0,%rsp
26: 5b pop %rbx
27: 5d pop %rbp
28: 41 5c pop %r12
* 2a: 41 5d pop %r13 <-- trapping instruction
2c: 41 5e pop %r14
2e: 41 5f pop %r15
30: c3 retq
31: 4d 8d 66 48 lea 0x48(%r14),%r12
35: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
3c: fc ff df
3f: 4c rex.WR