------------[ cut here ]------------
do not call blocking ops when !TASK_RUNNING; state=1 set at [<00000000dcc367fa>] n_hdlc_tty_read+0x301/0x7f0 drivers/tty/n_hdlc.c:589
WARNING: CPU: 0 PID: 15114 at kernel/sched/core.c:6099 __might_sleep+0x13d/0x190 kernel/sched/core.c:6094
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 15114 Comm: syz-executor5 Not tainted 4.20.0+ #173
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
kobject: 'kvm' (00000000c68d116a): kobject_uevent_env
 panic+0x2ad/0x55f kernel/panic.c:189
 __warn.cold.8+0x20/0x52 kernel/panic.c:544
 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 f2 4a 88 e8 03 18 f3 ff <0f> 0b e9 43 ff ff ff e8 37 81 6d 00 e9 26 ff ff ff e8 2d 81 6d 00
RSP: 0000:ffff888050e97948 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff888053d660c0 RCX: ffffc9000fe61000
RDX: 0000000000014986 RSI: ffffffff81683f55 RDI: 0000000000000005
RBP: ffff888050e97978 R08: ffff888053d660c0 R09: ffffed1015cc5020
R10: ffffed1015cc5020 R11: ffff8880ae628107 R12: ffffffff88809480
R13: 0000000000000019 R14: 0000000000000000 R15: ffff888053d660c0
 __might_fault+0xc6/0x1e0 mm/memory.c:4358
 _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+0x117/0xa80 fs/read_write.c:416
 vfs_read+0x17f/0x3e0 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]
 __x64_sys_read+0x73/0xb0 fs/read_write.c:586
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4579b9
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fca77e44c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004579b9
RDX: 0000000000001000 RSI: 0000000020000200 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fca77e456d4
R13: 00000000004c3401 R14: 00000000004d76c8 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..