INFO: task syz-executor.4:14530 blocked for more than 143 seconds.
Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:26512 pid:14530 tgid:14530 ppid:13881 flags:0x00000006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x5b9/0x9d0 kernel/locking/mutex.c:747
tty_release+0x8b/0x1420 drivers/tty/tty_io.c:1738
__fput+0x270/0xbb0 fs/file_table.c:394
__fput_sync+0x47/0x50 fs/file_table.c:475
__do_sys_close fs/open.c:1590 [inline]
__se_sys_close fs/open.c:1575 [inline]
__x64_sys_close+0x87/0xf0 fs/open.c:1575
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f6057e7ba9a
RSP: 002b:00007ffd63a2f860 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007f6057e7ba9a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f6057f9d980 R08: 0000001b2fa20000 R09: 0000000000000026
R10: 0000000081301e52 R11: 0000000000000293 R12: 000000000014a128
R13: ffffffffffffffff R14: 00007f6057a00000 R15: 0000000000149de7
</TASK>
INFO: task syz-executor.4:14552 blocked for more than 143 seconds.
Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:29536 pid:14552 tgid:14530 ppid:13881 flags:0x00000006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
__down_write_common+0x948/0x1400 kernel/locking/rwsem.c:1306
n_tty_flush_buffer+0x21/0x270 drivers/tty/n_tty.c:358
tty_ldisc_hangup+0xc7/0x6a0 drivers/tty/tty_ldisc.c:693
__tty_hangup.part.0+0x426/0x8b0 drivers/tty/tty_io.c:630
__tty_hangup drivers/tty/tty_io.c:697 [inline]
tty_vhangup drivers/tty/tty_io.c:700 [inline]
tty_vhangup drivers/tty/tty_io.c:697 [inline]
tty_ioctl+0xf40/0x1580 drivers/tty/tty_io.c:2720
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f6057e7cba9
RSP: 002b:00007f6058b330c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6057f9c1f0 RCX: 00007f6057e7cba9
RDX: 0000000000000000 RSI: 0000000000005437 RDI: 0000000000000003
RBP: 00007f6057ec847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f6057f9c1f0 R15: 00007ffd63a2f798
</TASK>
INFO: task syz-executor.3:14536 blocked for more than 143 seconds.
Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:26512 pid:14536 tgid:14536 ppid:13780 flags:0x00000006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x5b9/0x9d0 kernel/locking/mutex.c:747
tty_release+0x8b/0x1420 drivers/tty/tty_io.c:1738
__fput+0x270/0xbb0 fs/file_table.c:394
__fput_sync+0x47/0x50 fs/file_table.c:475
__do_sys_close fs/open.c:1590 [inline]
__se_sys_close fs/open.c:1575 [inline]
__x64_sys_close+0x87/0xf0 fs/open.c:1575
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fd77407ba9a
RSP: 002b:00007ffd72d35400 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007fd77407ba9a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007fd77419d980 R08: 0000001b31020000 R09: 0000000000000025
R10: 0000000081301e52 R11: 0000000000000293 R12: 000000000014a128
R13: ffffffffffffffff R14: 00007fd773c00000 R15: 0000000000149de7
</TASK>
INFO: task syz-executor.3:14553 blocked for more than 143 seconds.
Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28736 pid:14553 tgid:14536 ppid:13780 flags:0x00000006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
__down_write_common+0x948/0x1400 kernel/locking/rwsem.c:1306
n_tty_flush_buffer+0x21/0x270 drivers/tty/n_tty.c:358
tty_ldisc_hangup+0xc7/0x6a0 drivers/tty/tty_ldisc.c:693
__tty_hangup.part.0+0x426/0x8b0 drivers/tty/tty_io.c:630
__tty_hangup drivers/tty/tty_io.c:697 [inline]
tty_vhangup drivers/tty/tty_io.c:700 [inline]
tty_vhangup drivers/tty/tty_io.c:697 [inline]
tty_ioctl+0xf40/0x1580 drivers/tty/tty_io.c:2720
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fd77407cba9
RSP: 002b:00007fd774e340c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd77419c120 RCX: 00007fd77407cba9
RDX: 0000000000000000 RSI: 0000000000005437 RDI: 0000000000000003
RBP: 00007fd7740c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fd77419c120 R15: 00007ffd72d35338
</TASK>
INFO: task syz-executor.1:14534 blocked for more than 143 seconds.
Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26512 pid:14534 tgid:14534 ppid:13740 flags:0x00000006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x5b9/0x9d0 kernel/locking/mutex.c:747
tty_release+0x8b/0x1420 drivers/tty/tty_io.c:1738
__fput+0x270/0xbb0 fs/file_table.c:394
__fput_sync+0x47/0x50 fs/file_table.c:475
__do_sys_close fs/open.c:1590 [inline]
__se_sys_close fs/open.c:1575 [inline]
__x64_sys_close+0x87/0xf0 fs/open.c:1575
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f2fa007ba9a
RSP: 002b:00007ffe55c218e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007f2fa007ba9a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f2fa019d980 R08: 0000001b2ec20000 R09: 0000000000000028
R10: 0000000081301e52 R11: 0000000000000293 R12: 000000000014a286
R13: ffffffffffffffff R14: 00007f2f9fc00000 R15: 0000000000149e21
</TASK>
INFO: task syz-executor.1:14555 blocked for more than 143 seconds.
Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:28736 pid:14555 tgid:14534 ppid:13740 flags:0x00000006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
__down_write_common+0x948/0x1400 kernel/locking/rwsem.c:1306
n_tty_flush_buffer+0x21/0x270 drivers/tty/n_tty.c:358
tty_ldisc_hangup+0xc7/0x6a0 drivers/tty/tty_ldisc.c:693
__tty_hangup.part.0+0x426/0x8b0 drivers/tty/tty_io.c:630
__tty_hangup drivers/tty/tty_io.c:697 [inline]
tty_vhangup drivers/tty/tty_io.c:700 [inline]
tty_vhangup drivers/tty/tty_io.c:697 [inline]
tty_ioctl+0xf40/0x1580 drivers/tty/tty_io.c:2720
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f2fa007cba9
RSP: 002b:00007f2fa0e620c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2fa019c120 RCX: 00007f2fa007cba9
RDX: 0000000000000000 RSI: 0000000000005437 RDI: 0000000000000003
RBP: 00007f2fa00c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f2fa019c120 R15: 00007ffe55c21818
</TASK>
INFO: task syz-executor.0:14539 blocked for more than 143 seconds.
Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:26512 pid:14539 tgid:14539 ppid:13938 flags:0x00000006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x5b9/0x9d0 kernel/locking/mutex.c:747
tty_release+0x8b/0x1420 drivers/tty/tty_io.c:1738
__fput+0x270/0xbb0 fs/file_table.c:394
__fput_sync+0x47/0x50 fs/file_table.c:475
__do_sys_close fs/open.c:1590 [inline]
__se_sys_close fs/open.c:1575 [inline]
__x64_sys_close+0x87/0xf0 fs/open.c:1575
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fd3d407ba9a
RSP: 002b:00007ffc96decbc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007fd3d407ba9a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007fd3d419d980 R08: 0000001b32f20000 R09: 0000000000000025
R10: 0000000081301e52 R11: 0000000000000293 R12: 000000000014a192
R13: ffffffffffffffff R14: 00007fd3d3c00000 R15: 0000000000149e25
</TASK>
INFO: task syz-executor.0:14548 blocked for more than 143 seconds.
Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:29536 pid:14548 tgid:14539 ppid:13938 flags:0x00000006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
__down_write_common+0x948/0x1400 kernel/locking/rwsem.c:1306
n_tty_flush_buffer+0x21/0x270 drivers/tty/n_tty.c:358
tty_ldisc_hangup+0xc7/0x6a0 drivers/tty/tty_ldisc.c:693
__tty_hangup.part.0+0x426/0x8b0 drivers/tty/tty_io.c:630
__tty_hangup drivers/tty/tty_io.c:697 [inline]
tty_vhangup drivers/tty/tty_io.c:700 [inline]
tty_vhangup drivers/tty/tty_io.c:697 [inline]
tty_ioctl+0xf40/0x1580 drivers/tty/tty_io.c:2720
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fd3d407cba9
RSP: 002b:00007fd3d4d4f0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd3d419c120 RCX: 00007fd3d407cba9
RDX: 0000000000000000 RSI: 0000000000005437 RDI: 0000000000000003
RBP: 00007fd3d40c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fd3d419c120 R15: 00007ffc96decaf8
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cfabce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8cfabce0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8cfabce0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4821:
#0: ffff88802a3fa0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201
3 locks held by kworker/u4:12/7994:
1 lock held by syz-executor.5/13558:
1 lock held by syz-executor.4/14530:
#0: ffff8880a152c1c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: tty_release+0x8b/0x1420 drivers/tty/tty_io.c:1738
4 locks held by syz-executor.4/14537:
#0: ffff8880a152c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffff8880a152c130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:954 [inline]
#1: ffff8880a152c130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: iterate_tty_write drivers/tty/tty_io.c:973 [inline]
#1: ffff8880a152c130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x293/0x9b0 drivers/tty/tty_io.c:1092
#2: ffff8880a152c2e8 (&tty->termios_rwsem){++++}-{3:3}, at: n_tty_write+0x1c8/0x1130 drivers/tty/n_tty.c:2362
#3: ffffc90003413380 (&ldata->output_lock){+.+.}-{3:3}, at: process_output_block drivers/tty/n_tty.c:529 [inline]
#3: ffffc90003413380 (&ldata->output_lock){+.+.}-{3:3}, at: n_tty_write+0x539/0x1130 drivers/tty/n_tty.c:2379
1 lock held by syz-executor.4/14543:
3 locks held by syz-executor.4/14552:
#0: ffff8880a152c1c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: __tty_hangup.part.0+0xbe/0x8b0 drivers/tty/tty_io.c:590
#1: ffff8880a152c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref drivers/tty/tty_ldisc.c:263 [inline]
#1: ffff8880a152c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_hangup+0x30/0x6a0 drivers/tty/tty_ldisc.c:690
#2: ffff8880a152c2e8 (&tty->termios_rwsem){++++}-{3:3}, at: n_tty_flush_buffer+0x21/0x270 drivers/tty/n_tty.c:358
1 lock held by syz-executor.3/14536:
#0: ffff8880a714f1c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: tty_release+0x8b/0x1420 drivers/tty/tty_io.c:1738
6 locks held by syz-executor.3/14538:
1 lock held by syz-executor.3/14545:
3 locks held by syz-executor.3/14553:
#0: ffff8880a714f1c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: __tty_hangup.part.0+0xbe/0x8b0 drivers/tty/tty_io.c:590
#1: ffff8880a714f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref drivers/tty/tty_ldisc.c:263 [inline]
#1: ffff8880a714f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_hangup+0x30/0x6a0 drivers/tty/tty_ldisc.c:690
#2: ffff8880a714f2e8 (&tty->termios_rwsem){++++}-{3:3}, at: n_tty_flush_buffer+0x21/0x270 drivers/tty/n_tty.c:358
1 lock held by syz-executor.1/14534:
#0: ffff8880a152f1c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: tty_release+0x8b/0x1420 drivers/tty/tty_io.c:1738
4 locks held by syz-executor.1/14541:
#0: ffff8880a152f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffff8880a152f130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:954 [inline]
#1: ffff8880a152f130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: iterate_tty_write drivers/tty/tty_io.c:973 [inline]
#1: ffff8880a152f130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x293/0x9b0 drivers/tty/tty_io.c:1092
#2: ffff8880a152f2e8 (&tty->termios_rwsem){++++}-{3:3}, at: n_tty_write+0x1c8/0x1130 drivers/tty/n_tty.c:2362
#3: ffffc90003433380 (&ldata->output_lock){+.+.}-{3:3}, at: process_output_block drivers/tty/n_tty.c:529 [inline]
#3: ffffc90003433380 (&ldata->output_lock){+.+.}-{3:3}, at: n_tty_write+0x539/0x1130 drivers/tty/n_tty.c:2379
2 locks held by syz-executor.1/14544:
3 locks held by syz-executor.1/14555:
#0: ffff8880a152f1c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: __tty_hangup.part.0+0xbe/0x8b0 drivers/tty/tty_io.c:590
#1: ffff8880a152f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref drivers/tty/tty_ldisc.c:263 [inline]
#1: ffff8880a152f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_hangup+0x30/0x6a0 drivers/tty/tty_ldisc.c:690
#2: ffff8880a152f2e8 (&tty->termios_rwsem){++++}-{3:3}, at: n_tty_flush_buffer+0x21/0x270 drivers/tty/n_tty.c:358
1 lock held by syz-executor.0/14539:
#0: ffff888035afd1c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: tty_release+0x8b/0x1420 drivers/tty/tty_io.c:1738
4 locks held by syz-executor.0/14540:
#0: ffff888035afd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffff888035afd130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:954 [inline]
#1: ffff888035afd130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: iterate_tty_write drivers/tty/tty_io.c:973 [inline]
#1: ffff888035afd130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x293/0x9b0 drivers/tty/tty_io.c:1092
#2: ffff888035afd2e8 (&tty->termios_rwsem){++++}-{3:3}, at: n_tty_write+0x1c8/0x1130 drivers/tty/n_tty.c:2362
#3: ffffc90003453380 (&ldata->output_lock){+.+.}-{3:3}, at: process_output_block drivers/tty/n_tty.c:529 [inline]
#3: ffffc90003453380 (&ldata->output_lock){+.+.}-{3:3}, at: n_tty_write+0x539/0x1130 drivers/tty/n_tty.c:2379
1 lock held by syz-executor.0/14547:
3 locks held by syz-executor.0/14548:
#0: ffff888035afd1c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: __tty_hangup.part.0+0xbe/0x8b0 drivers/tty/tty_io.c:590
#1: ffff888035afd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref drivers/tty/tty_ldisc.c:263 [inline]
#1: ffff888035afd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_hangup+0x30/0x6a0 drivers/tty/tty_ldisc.c:690
#2: ffff888035afd2e8 (&tty->termios_rwsem){++++}-{3:3}, at: n_tty_flush_buffer+0x21/0x270 drivers/tty/n_tty.c:358
1 lock held by syz-executor.5/14556:
#0: ffff8880a0ba31c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: tty_release+0x8b/0x1420 drivers/tty/tty_io.c:1738
4 locks held by syz-executor.5/14557:
#0: ffff8880a0ba30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffff8880a0ba3130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:954 [inline]
#1: ffff8880a0ba3130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: iterate_tty_write drivers/tty/tty_io.c:973 [inline]
#1: ffff8880a0ba3130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x293/0x9b0 drivers/tty/tty_io.c:1092
#2: ffff8880a0ba32e8 (&tty->termios_rwsem){++++}-{3:3}, at: n_tty_write+0x1c8/0x1130 drivers/tty/n_tty.c:2362
#3: ffffc90003515380 (&ldata->output_lock){+.+.}-{3:3}, at: process_output drivers/tty/n_tty.c:491 [inline]
#3: ffffc90003515380 (&ldata->output_lock){+.+.}-{3:3}, at: n_tty_write+0x4b5/0x1130 drivers/tty/n_tty.c:2390
2 locks held by syz-executor.5/14558:
3 locks held by syz-executor.5/14560:
#0: ffff8880a0ba31c0 (&tty->legacy_mutex){+.+.}-{3:3}, at: __tty_hangup.part.0+0xbe/0x8b0 drivers/tty/tty_io.c:590
#1: ffff8880a0ba30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref drivers/tty/tty_ldisc.c:263 [inline]
#1: ffff8880a0ba30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_hangup+0x30/0x6a0 drivers/tty/tty_ldisc.c:690
#2: ffff8880a0ba32e8 (&tty->termios_rwsem){++++}-{3:3}, at: n_tty_flush_buffer+0x21/0x270 drivers/tty/n_tty.c:358
1 lock held by syz-executor.5/15120:
1 lock held by syz-executor.4/15142:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7994 Comm: kworker/u4:12 Not tainted 6.7.0-rc4-syzkaller-00358-gf2e8a57ee903 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:hlock_id kernel/locking/lockdep.c:430 [inline]
RIP: 0010:__lock_acquire+0xb1d/0x3b20 kernel/locking/lockdep.c:5125
Code: 89 5c 24 20 48 c1 e8 20 89 c6 89 44 24 48 01 d8 c1 c6 04 89 44 24 60 89 74 24 68 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 40 <48> c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e b8 2b 00 00 45 0f
RSP: 0018:ffffc9000a05f978 EFLAGS: 00000892
RAX: dffffc0000000000 RBX: 0d2eb48eb80a5fc9 RCX: ffffffff8167de85
RDX: ffff8880506d46b0 RSI: 00000000d2eb48e0 RDI: ffff8880506d46b1
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff23e37d0
R10: ffffffff91f1be87 R11: 0000000000000002 R12: ffff8880506d4690
R13: ffffed100a0da8c7 R14: ffff8880506d4640 R15: 0000000000000004
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020226030 CR3: 000000001ab93000 CR4: 0000000000350ef0
Call Trace:
<NMI>
</NMI>
<TASK>
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
rcu_read_lock include/linux/rcupdate.h:747 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0x16e/0x10e0 net/batman-adv/network-coding.c:719
process_one_work+0x886/0x15d0 kernel/workqueue.c:2627
process_scheduled_works kernel/workqueue.c:2700 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
</TASK>