INFO: task syz-executor.1:12072 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:28120 pid:12072 ppid: 6543 flags:0x20004006
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6382
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
tty_release_struct+0xa9/0xe0 drivers/tty/tty_io.c:1716
tty_release+0xc70/0x1200 drivers/tty/tty_io.c:1878
__fput+0x286/0x9f0 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xbaa/0x2a20 kernel/exit.c:826
do_group_exit+0x125/0x310 kernel/exit.c:923
get_signal+0x47d/0x21d0 kernel/signal.c:2855
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:313
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0023:0xf6f83c62
RSP: 002b:00000000f75f4ab0 EFLAGS: 00000246
RAX: 00000000ce5fa02f RBX: 00000000ce5fa02b RCX: 00000000f7099000
RDX: 000000000a39f21c RSI: 0000000083f5bf86 RDI: 00000000ffffffff
RBP: 000000000000aa5d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor.0:12075 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28120 pid:12075 ppid: 6513 flags:0x20004006
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6382
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
tty_release_struct+0xa9/0xe0 drivers/tty/tty_io.c:1716
tty_release+0xc70/0x1200 drivers/tty/tty_io.c:1878
__fput+0x286/0x9f0 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xbaa/0x2a20 kernel/exit.c:826
do_group_exit+0x125/0x310 kernel/exit.c:923
get_signal+0x47d/0x21d0 kernel/signal.c:2855
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:313
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0023:0xf6ed3940
RSP: 002b:00000000f75449f0 EFLAGS: 00000246
RAX: 00000000f6cf4488 RBX: 00000000ffffffff RCX: 0000000083a1c82a
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000083a1c82a
RBP: 00000000f6cf0078 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor.3:12091 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28120 pid:12091 ppid: 6784 flags:0x20004006
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6382
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
tty_release_struct+0xa9/0xe0 drivers/tty/tty_io.c:1716
tty_release+0xc70/0x1200 drivers/tty/tty_io.c:1878
__fput+0x286/0x9f0 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xbaa/0x2a20 kernel/exit.c:826
do_group_exit+0x125/0x310 kernel/exit.c:923
get_signal+0x47d/0x21d0 kernel/signal.c:2855
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:313
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0023:0xf6efe936
RSP: 002b:00000000f756f9b0 EFLAGS: 00000206
RAX: 00000000f6d4f6d8 RBX: 00000000ffffffff RCX: 0000000083a1c801
RDX: 00000000f6d461f0 RSI: 00000000ffffffff RDI: 0000000083a1c821
RBP: 00000000f6d461f8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor.4:12293 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27784 pid:12293 ppid: 6983 flags:0x20004004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6382
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
tty_open+0x55e/0x1000 drivers/tty/tty_io.c:2146
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x4c8/0x11d0 fs/open.c:822
do_open fs/namei.c:3426 [inline]
path_openat+0x1c9a/0x2740 fs/namei.c:3559
do_filp_open+0x1aa/0x400 fs/namei.c:3586
do_sys_openat2+0x16d/0x4d0 fs/open.c:1200
do_sys_open fs/open.c:1216 [inline]
__do_compat_sys_openat fs/open.c:1276 [inline]
__se_compat_sys_openat fs/open.c:1274 [inline]
__ia32_compat_sys_openat+0x13f/0x1f0 fs/open.c:1274
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6eb1549
RSP: 002b:00000000f44ab1a0 EFLAGS: 00000282 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000f44ab1f0
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 00000000f6fe7000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b9838e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
1 lock held by in:imklog/6188:
#0: ffff88807b75cff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by agetty/6192:
#0: ffff8880125fa098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90001a582e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.2/5224:
2 locks held by syz-executor.5/12049:
1 lock held by syz-executor.1/12072:
#0: ffffffff8c38fec8 (tty_mutex){+.+.}-{3:3}, at: tty_release_struct+0xa9/0xe0 drivers/tty/tty_io.c:1716
1 lock held by syz-executor.0/12075:
#0: ffffffff8c38fec8 (tty_mutex){+.+.}-{3:3}, at: tty_release_struct+0xa9/0xe0 drivers/tty/tty_io.c:1716
1 lock held by syz-executor.3/12091:
#0: ffffffff8c38fec8 (tty_mutex){+.+.}-{3:3}, at: tty_release_struct+0xa9/0xe0 drivers/tty/tty_io.c:1716
1 lock held by syz-executor.4/12293:
#0: ffffffff8c38fec8 (tty_mutex){+.+.}-{3:3}, at: tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
#0: ffffffff8c38fec8 (tty_mutex){+.+.}-{3:3}, at: tty_open+0x55e/0x1000 drivers/tty/tty_io.c:2146
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 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+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 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: 5224 Comm: syz-executor.2 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:signal_setup_done+0x60/0x490 kernel/signal.c:2898
Code: 03 48 c7 44 24 10 b0 8b 49 81 4a 8d 44 35 00 c7 00 f1 f1 f1 f1 c7 40 04 00 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 44 24 58 <31> c0 e8 79 39 2e 00 31 ff 44 89 e6 e8 af 40 2e 00 45 85 e4 74 62
RSP: 0000:ffffc9000beafcf8 EFLAGS: 00000a06
RAX: e5982a00bbc7c900 RBX: ffffc9000beafe28 RCX: 1ffffffff1ade3e1
RDX: 0000000000000000 RSI: ffffc9000beafe28 RDI: 0000000000000000
RBP: 1ffff920017d5f9f R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817e0068 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000004
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0063) knlGS:00000000f44ffb40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000000000054 CR3: 0000000087851000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
handle_signal arch/x86/kernel/signal.c:843 [inline]
arch_do_signal_or_restart+0xc9b/0x1c40 arch/x86/kernel/signal.c:870
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:313
exc_page_fault+0xc6/0x180 arch/x86/mm/fault.c:1544
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0023:0xf6f16aa0
Code: e8 15 8f 04 00 83 c4 10 85 c0 75 12 83 c4 20 5b 5e 5f c3 8d 83 05 a1 f7 ff e8 4c fb ff ff 8d 83 13 a1 f7 ff e8 41 fb ff ff 90 <53> e8 8a ec ff ff 81 c3 5a 45 12 00 83 ec 08 8b 44 24 14 8b 40 0c
RSP: 002b:00000000f44ff13c EFLAGS: 00000283
RAX: 000000000000000b RBX: 0000000000000000 RCX: 00000000f44ff1cc
RDX: 00000000f44ff14c RSI: 0000000000000005 RDI: 0000000000000000
RBP: 00000000f7061fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 03 48 c7 add -0x39(%rax),%ecx
3: 44 24 10 rex.R and $0x10,%al
6: b0 8b mov $0x8b,%al
8: 49 81 4a 8d 44 35 00 orq $0xffffffffc7003544,-0x73(%r10)
f: c7
10: 00 f1 add %dh,%cl
12: f1 icebp
13: f1 icebp
14: f1 icebp
15: c7 40 04 00 f3 f3 f3 movl $0xf3f3f300,0x4(%rax)
1c: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
23: 00 00
25: 48 89 44 24 58 mov %rax,0x58(%rsp)
* 2a: 31 c0 xor %eax,%eax <-- trapping instruction
2c: e8 79 39 2e 00 callq 0x2e39aa
31: 31 ff xor %edi,%edi
33: 44 89 e6 mov %r12d,%esi
36: e8 af 40 2e 00 callq 0x2e40ea
3b: 45 85 e4 test %r12d,%r12d
3e: 74 62 je 0xa2