[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Load/Save RF Kill Switch Status.
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.0.177' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 59.075176][ T6847] ------------[ cut here ]------------
[ 59.080816][ T6847] WARNING: CPU: 1 PID: 6847 at fs/overlayfs/file.c:81 ovl_real_fdget_meta+0x49c/0x530
[ 59.091607][ T6847] Kernel panic - not syncing: panic_on_warn set ...
[ 59.098192][ T6847] CPU: 1 PID: 6847 Comm: syz-executor194 Not tainted 5.8.0-syzkaller #0
[ 59.106485][ T6847] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 59.116514][ T6847] Call Trace:
[ 59.119782][ T6847] dump_stack+0x18f/0x20d
[ 59.124784][ T6847] panic+0x2e3/0x75c
[ 59.128665][ T6847] ? __warn_printk+0xf3/0xf3
[ 59.133237][ T6847] ? printk+0xba/0xed
[ 59.137203][ T6847] ? log_store.cold+0x16/0x16
[ 59.141873][ T6847] ? __warn.cold+0x5/0x4a
[ 59.146177][ T6847] ? __warn+0xd6/0x1f2
[ 59.150320][ T6847] ? ovl_real_fdget_meta+0x49c/0x530
[ 59.155587][ T6847] __warn.cold+0x20/0x4a
[ 59.159805][ T6847] ? ovl_real_fdget_meta+0x49c/0x530
[ 59.165761][ T6847] report_bug+0x1bd/0x210
[ 59.170078][ T6847] handle_bug+0x38/0x90
[ 59.174253][ T6847] exc_invalid_op+0x14/0x40
[ 59.178748][ T6847] asm_exc_invalid_op+0x12/0x20
[ 59.183584][ T6847] RIP: 0010:ovl_real_fdget_meta+0x49c/0x530
[ 59.189469][ T6847] Code: ff 4c 89 ff e8 45 de 2a ff e9 ff fc ff ff e8 3b de 2a ff e9 c5 fc ff ff 4c 89 f7 e8 9e de 2a ff e9 5d fd ff ff e8 74 cc ea fe <0f> 0b 41 bd fb ff ff ff e9 fd fc ff ff e8 22 de 2a ff e9 84 fb ff
[ 59.209051][ T6847] RSP: 0018:ffffc90005ee7a78 EFLAGS: 00010293
[ 59.215093][ T6847] RAX: 0000000000000000 RBX: 0000000000002000 RCX: ffffffff82897279
[ 59.223038][ T6847] RDX: ffff88808ae902c0 RSI: ffffffff828974ac RDI: 0000000000000005
[ 59.230980][ T6847] RBP: 0000000004048000 R08: 0000000000000000 R09: ffff88808ae90ba0
[ 59.238925][ T6847] R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880a7476d00
[ 59.246870][ T6847] R13: ffff8880860d73f8 R14: 000000000000a000 R15: ffff8880a7476d80
[ 59.254850][ T6847] ? ovl_real_fdget_meta+0x269/0x530
[ 59.260121][ T6847] ? ovl_real_fdget_meta+0x49c/0x530
[ 59.265395][ T6847] ? ovl_real_fdget_meta+0x49c/0x530
[ 59.270664][ T6847] ovl_splice_read+0x83/0x1f0
[ 59.275319][ T6847] ? ovl_mmap+0x2f0/0x2f0
[ 59.279633][ T6847] ? security_file_permission+0x248/0x560
[ 59.285329][ T6847] ? ovl_mmap+0x2f0/0x2f0
[ 59.289640][ T6847] do_splice_to+0x10b/0x170
[ 59.294120][ T6847] splice_direct_to_actor+0x307/0x980
[ 59.299470][ T6847] ? generic_splice_sendpage+0x140/0x140
[ 59.305122][ T6847] ? do_splice_to+0x170/0x170
[ 59.309774][ T6847] ? security_file_permission+0x248/0x560
[ 59.315471][ T6847] do_splice_direct+0x1b3/0x280
[ 59.320295][ T6847] ? splice_direct_to_actor+0x980/0x980
[ 59.325818][ T6847] ? __sb_start_write+0x1d5/0x470
[ 59.330818][ T6847] do_sendfile+0x55f/0xd40
[ 59.335225][ T6847] ? do_compat_pwritev64+0x1b0/0x1b0
[ 59.340500][ T6847] ? do_fcntl+0xa3/0x1070
[ 59.344801][ T6847] ? f_setown+0x230/0x230
[ 59.349206][ T6847] __x64_sys_sendfile64+0x1cc/0x210
[ 59.354393][ T6847] ? __ia32_sys_sendfile+0x220/0x220
[ 59.359675][ T6847] ? lockdep_hardirqs_on_prepare+0x354/0x530
[ 59.365636][ T6847] ? trace_hardirqs_on+0x5f/0x220
[ 59.370637][ T6847] ? lockdep_hardirqs_on+0x76/0xf0
[ 59.375740][ T6847] do_syscall_64+0x2d/0x70
[ 59.380140][ T6847] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 59.386009][ T6847] RIP: 0033:0x4403d9
[ 59.389880][ T6847] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
[ 59.409469][ T6847] RSP: 002b:00007ffe4a9344e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
[ 59.417853][ T6847] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004403d9
[ 59.425810][ T6847] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003
[ 59.433756][ T6847] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
[ 59.441702][ T6847] R10: 000000000000bd96 R11: 0000000000000246 R12: 0000000000401be0
[ 59.449650][ T6847] R13: 0000000000401c70 R14: 0000000000000000 R15: 0000000000000000
[ 59.459112][ T6847] Kernel Offset: disabled
[ 59.463471][ T6847] Rebooting in 86400 seconds..