INFO: task syz-executor.3:11052 blocked for more than 143 seconds.
Not tainted 5.9.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28816 pid:11052 ppid: 377 flags:0x80004006
Call Trace:
context_switch kernel/sched/core.c:3778 [inline]
__schedule+0x889/0x1f70 kernel/sched/core.c:4527
schedule+0xcd/0x2b0 kernel/sched/core.c:4602
wdm_flush+0x2e9/0x3c0 drivers/usb/class/cdc-wdm.c:590
filp_close+0xb4/0x170 fs/open.c:1276
close_files fs/file.c:401 [inline]
put_files_struct fs/file.c:429 [inline]
put_files_struct+0x1d0/0x350 fs/file.c:426
exit_files+0x7e/0xa0 fs/file.c:458
do_exit+0xb75/0x2890 kernel/exit.c:801
do_group_exit+0x125/0x310 kernel/exit.c:903
get_signal+0x42d/0x1f10 kernel/signal.c:2757
arch_do_signal+0x88/0x1a00 arch/x86/kernel/signal.c:811
exit_to_user_mode_loop kernel/entry/common.c:135 [inline]
exit_to_user_mode_prepare+0xf9/0x150 kernel/entry/common.c:166
syscall_exit_to_user_mode+0x36/0x260 kernel/entry/common.c:241
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45ba81
Code: Bad RIP value.
RSP: 002b:00007ffcd43b11a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000023
RAX: fffffffffffffdfc RBX: 0000000000062a78 RCX: 000000000045ba81
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffcd43b11b0
RBP: 0000000000000001 R08: 00000000a695e6fb R09: 00000000a695e6ff
R10: 00007ffcd43b12b0 R11: 0000000000000293 R12: 000000000118cf40
R13: 000000000118d940 R14: ffffffffffffffff R15: 000000000118cfec
INFO: task syz-executor.4:11183 blocked for more than 143 seconds.
Not tainted 5.9.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28816 pid:11183 ppid: 384 flags:0x80004006
Call Trace:
context_switch kernel/sched/core.c:3778 [inline]
__schedule+0x889/0x1f70 kernel/sched/core.c:4527
schedule+0xcd/0x2b0 kernel/sched/core.c:4602
wdm_flush+0x2e9/0x3c0 drivers/usb/class/cdc-wdm.c:590
filp_close+0xb4/0x170 fs/open.c:1276
close_files fs/file.c:401 [inline]
put_files_struct fs/file.c:429 [inline]
put_files_struct+0x1d0/0x350 fs/file.c:426
exit_files+0x7e/0xa0 fs/file.c:458
do_exit+0xb75/0x2890 kernel/exit.c:801
do_group_exit+0x125/0x310 kernel/exit.c:903
get_signal+0x42d/0x1f10 kernel/signal.c:2757
arch_do_signal+0x88/0x1a00 arch/x86/kernel/signal.c:811
exit_to_user_mode_loop kernel/entry/common.c:135 [inline]
exit_to_user_mode_prepare+0xf9/0x150 kernel/entry/common.c:166
syscall_exit_to_user_mode+0x36/0x260 kernel/entry/common.c:241
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: Bad RIP value.
RSP: 002b:00007ffca2d95ca8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 0000000000000be5 RCX: 000000000045d5b9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000118cf4c
RBP: 000000000118cf40 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ffca2d95d90 R11: 0000000000000246 R12: 00000000000003e8
R13: 00000000000647b4 R14: 0000000000063bcf R15: 000000000118cf4c
Showing all locks held in the system:
1 lock held by khungtaskd/23:
#0: ffffffff87313620 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x264 kernel/locking/lockdep.c:5825
2 locks held by in:imklog/248:
#0: ffff8881cb1e0370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930
#1: ffff8881db332ad8 (&rq->lock){-.-.}-{2:2}, at: syslog_print kernel/printk/printk.c:1400 [inline]
#1: ffff8881db332ad8 (&rq->lock){-.-.}-{2:2}, at: do_syslog.part.0+0x4a0/0x1340 kernel/printk/printk.c:1565
2 locks held by agetty/262:
#0: ffff8881c919c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267
#1: ffffc900009fa2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x223/0x1a30 drivers/tty/n_tty.c:2156
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 23 Comm: khungtaskd Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0xf6/0x16e lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x74/0xb6 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1da/0x1f4 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
watchdog+0xd6a/0xfd0 kernel/hung_task.c:295
kthread+0x392/0x470 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 104 Comm: systemd-journal Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x4/0x20 kernel/kcov.c:290
Code: 84 00 00 00 00 00 48 8b 0c 24 89 f2 89 fe bf 05 00 00 00 e9 ae fe ff ff 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 48 8b 0c 24 <48> 89 f2 48 89 fe bf 07 00 00 00 e9 8c fe ff ff 66 90 66 2e 0f 1f
RSP: 0018:ffff8881d2757d80 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000fe0 RCX: ffffffff816c7f8f
RDX: ffff8881d260b280 RSI: ffff8881c3da9120 RDI: 0000000000000010
RBP: ffff8881c3daa100 R08: 0000000000000001 R09: ffff8881c3daa0ff
R10: ffff8881c3da9120 R11: 0000000000000000 R12: ffff8881c3da9120
R13: 0000000000000000 R14: ffff8881c3daa0ff R15: ffffffff880b4378
FS: 00007f6c322c18c0(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6c2f189000 CR3: 00000001d31b9000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
check_bogus_address mm/usercopy.c:155 [inline]
__check_object_size mm/usercopy.c:266 [inline]
__check_object_size+0x7f/0x397 mm/usercopy.c:256
check_object_size include/linux/thread_info.h:119 [inline]
strncpy_from_user+0xaf/0x3e0 lib/strncpy_from_user.c:119
getname_flags.part.0+0x95/0x4f0 fs/namei.c:149
getname_flags fs/namei.c:2646 [inline]
user_path_at_empty+0xa1/0x100 fs/namei.c:2646
user_path_at include/linux/namei.h:59 [inline]
do_faccessat+0x129/0x820 fs/open.c:423
do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f6c3157d9c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffd7a0bd2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffd7a0c0210 RCX: 00007f6c3157d9c7
RDX: 00007f6c31feea00 RSI: 0000000000000000 RDI: 00005588532249a3
RBP: 00007ffd7a0bd330 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffd7a0c0210 R15: 00007ffd7a0bd820