------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=1 set at [<0000000085ba5236>] n_hdlc_tty_read+0x32a/0x810 drivers/tty/n_hdlc.c:589 WARNING: CPU: 0 PID: 32224 at kernel/sched/core.c:6094 __might_sleep+0x13d/0x190 kernel/sched/core.c:6094 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 32224 Comm: syz-executor2 Not tainted 5.0.0-rc1+ #14 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+0x1db/0x2d0 lib/dump_stack.c:113 kobject: 'loop0' (00000000b39a5af1): kobject_uevent_env kobject: 'loop0' (00000000b39a5af1): fill_kobj_path: path = '/devices/virtual/block/loop0' panic+0x2cb/0x65c kernel/panic.c:214 kobject: 'loop5' (00000000d99b8420): kobject_uevent_env __warn.cold+0x20/0x48 kernel/panic.c:571 kobject: 'loop5' (00000000d99b8420): fill_kobj_path: path = '/devices/virtual/block/loop5' report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 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 c0 22 4b 88 e8 53 1b f3 ff <0f> 0b e9 43 ff ff ff e8 17 b0 6d 00 e9 26 ff ff ff e8 0d b0 6d 00 RSP: 0018:ffff88809bab7910 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff88809f390300 RCX: ffffc9000a014000 RDX: 000000000001b5e6 RSI: ffffffff81684ce6 RDI: 0000000000000005 RBP: ffff88809bab7940 R08: ffff88809f390300 R09: ffffed1015cc5021 R10: ffffed1015cc5020 R11: ffff8880ae628107 R12: ffffffff88819420 R13: 0000000000000019 R14: 0000000000000000 R15: ffff88809f390300 __might_fault+0xc6/0x1e0 mm/memory.c:4357 _copy_to_user+0x30/0x120 lib/usercopy.c:25 copy_to_user include/linux/uaccess.h:152 [inline] n_hdlc_tty_read+0x60f/0x810 drivers/tty/n_hdlc.c:600 tty_read+0x196/0x2a0 drivers/tty/tty_io.c:866 kobject: 'loop3' (000000009a93651e): kobject_uevent_env do_loop_readv_writev fs/read_write.c:700 [inline] do_loop_readv_writev fs/read_write.c:687 [inline] do_iter_read+0x4a9/0x660 fs/read_write.c:921 vfs_readv+0x175/0x1c0 fs/read_write.c:983 kobject: 'loop3' (000000009a93651e): fill_kobj_path: path = '/devices/virtual/block/loop3' do_readv+0x11a/0x300 fs/read_write.c:1016 __do_sys_readv fs/read_write.c:1103 [inline] __se_sys_readv fs/read_write.c:1100 [inline] __x64_sys_readv+0x75/0xb0 fs/read_write.c:1100 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f01246fec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 RDX: 000000000000000a RSI: 0000000020000800 RDI: 0000000000000004 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f01246ff6d4 R13: 00000000004c487d R14: 00000000004d7ff0 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..