------------[ cut here ]------------
do not call blocking ops when !TASK_RUNNING; state=1 set at [<0000000074763c31>] n_hdlc_tty_read+0x301/0x7f0 drivers/tty/n_hdlc.c:589
WARNING: CPU: 1 PID: 8011 at kernel/sched/core.c:6099 __might_sleep+0x13d/0x190 kernel/sched/core.c:6094
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8011 Comm: syz-executor385 Not tainted 4.20.0 #290
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+0x1d3/0x2c6 lib/dump_stack.c:113
 panic+0x2ad/0x55c kernel/panic.c:188
 __warn.cold.8+0x20/0x45 kernel/panic.c:540
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:__might_sleep+0x13d/0x190 kernel/sched/core.c:6094
Code: 65 48 8b 1c 25 40 ee 01 00 48 8d 7b 10 48 89 fe 48 c1 ee 03 80 3c 06 00 75 2b 48 8b 73 10 48 c7 c7 40 e0 2a 88 e8 43 27 f3 ff <0f> 0b e9 43 ff ff ff e8 f7 7c 6c 00 e9 26 ff ff ff e8 ed 7c 6c 00
RSP: 0018:ffff8881b141f8f8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8881c1230140 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8164e045 RDI: 0000000000000005
RBP: ffff8881b141f928 R08: ffff8881c1230140 R09: 0000000000000007
R10: 0000000000000000 R11: ffff8881c1230140 R12: ffffffff8860b220
R13: 0000000000000019 R14: 0000000000000000 R15: ffff8881c1230140
 __might_fault+0xc6/0x1e0 mm/memory.c:4357
 _copy_to_user+0x30/0x110 lib/usercopy.c:25
 copy_to_user include/linux/uaccess.h:155 [inline]
 n_hdlc_tty_read+0x5c1/0x7f0 drivers/tty/n_hdlc.c:600
 tty_read+0x194/0x2a0 drivers/tty/tty_io.c:866
 __vfs_read+0x117/0x9b0 fs/read_write.c:416
 vfs_read+0x17f/0x3c0 fs/read_write.c:452
 ksys_read+0x101/0x260 fs/read_write.c:578
 __do_sys_read fs/read_write.c:588 [inline]
 __se_sys_read fs/read_write.c:586 [inline]
 __ia32_sys_read+0x71/0xb0 fs/read_write.c:586
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f00a49
Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000ffac2a7c EFLAGS: 00000282 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000080
RDX: 0000000000000057 RSI: 00000000080ea080 RDI: 00000000ffac2ad0
RBP: 0000000000001000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..