[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.22' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 63.777778][ T6915] ------------[ cut here ]------------ [ 63.783454][ T6915] WARNING: CPU: 0 PID: 6915 at kernel/signal.c:2431 get_signal+0x1b5c/0x1f00 [ 63.792204][ T6915] Kernel panic - not syncing: panic_on_warn set ... [ 63.798783][ T6915] CPU: 0 PID: 6915 Comm: syz-executor027 Not tainted 5.9.0-rc7-syzkaller #0 [ 63.807435][ T6915] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.817468][ T6915] Call Trace: [ 63.820760][ T6915] dump_stack+0x198/0x1fd [ 63.825081][ T6915] panic+0x382/0x7fb [ 63.828953][ T6915] ? __warn_printk+0xf3/0xf3 [ 63.833520][ T6915] ? printk+0xba/0xed [ 63.837477][ T6915] ? log_store.cold+0x16/0x16 [ 63.842129][ T6915] ? __warn.cold+0x5/0x4b [ 63.846435][ T6915] ? __warn+0xd6/0x1f2 [ 63.850494][ T6915] ? get_signal+0x1b5c/0x1f00 [ 63.855163][ T6915] __warn.cold+0x20/0x4b [ 63.859395][ T6915] ? get_signal+0x1b5c/0x1f00 [ 63.864067][ T6915] report_bug+0x1bd/0x210 [ 63.868391][ T6915] handle_bug+0x38/0x90 [ 63.872543][ T6915] exc_invalid_op+0x14/0x40 [ 63.877024][ T6915] asm_exc_invalid_op+0x12/0x20 [ 63.881866][ T6915] RIP: 0010:get_signal+0x1b5c/0x1f00 [ 63.887142][ T6915] Code: 00 48 c7 c2 40 da 8a 88 be d1 09 00 00 48 c7 c7 a0 da 8a 88 c6 05 c9 a3 09 0a 01 e8 43 97 11 00 e9 42 f5 ff ff e8 14 78 2b 00 <0f> 0b 41 bc 00 80 00 00 e9 49 f9 ff ff 4c 89 ef e8 7f 4f 6c 00 e9 [ 63.906722][ T6915] RSP: 0018:ffffc90005547ce8 EFLAGS: 00010093 [ 63.912785][ T6915] RAX: 0000000000000000 RBX: 0000000100000000 RCX: ffffffff814abfc3 [ 63.920735][ T6915] RDX: ffff888092f4e580 RSI: ffffffff814ac67c RDI: 0000000000000005 [ 63.928686][ T6915] RBP: 0000000000000000 R08: 0000000000000001 R09: ffff888092f4ea0f [ 63.936636][ T6915] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000008000 [ 63.944611][ T6915] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 [ 63.952576][ T6915] ? get_signal+0x14a3/0x1f00 [ 63.957229][ T6915] ? get_signal+0x1b5c/0x1f00 [ 63.961889][ T6915] ? get_signal+0x1b5c/0x1f00 [ 63.966576][ T6915] arch_do_signal+0x82/0x2520 [ 63.971248][ T6915] ? find_held_lock+0x2d/0x110 [ 63.976019][ T6915] ? copy_siginfo_to_user32+0xa0/0xa0 [ 63.981368][ T6915] ? lock_acquire+0x1f3/0xaf0 [ 63.986023][ T6915] ? lock_is_held_type+0xbb/0xf0 [ 63.990939][ T6915] ? find_held_lock+0x2d/0x110 [ 63.995693][ T6915] ? ret_from_fork+0x8/0x30 [ 64.000178][ T6915] ? exit_to_user_mode_prepare+0xb9/0x200 [ 64.005876][ T6915] ? check_preemption_disabled+0x50/0x130 [ 64.011591][ T6915] exit_to_user_mode_prepare+0x1ae/0x200 [ 64.017329][ T6915] syscall_exit_to_user_mode+0x7e/0x2e0 [ 64.022855][ T6915] ret_from_fork+0x15/0x30 [ 64.027247][ T6915] RIP: 0023:0xf7fa2549 [ 64.031308][ T6915] Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 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 [ 64.050913][ T6915] RSP: 002b:00000000f7f9d1ec EFLAGS: 00000296 ORIG_RAX: 0000000000000078 [ 64.059310][ T6915] RAX: 0000000000000000 RBX: 000000000007a900 RCX: 0000000000000000 [ 64.067260][ T6915] RDX: 0000000099999999 RSI: 0000000000000000 RDI: 00000000ffffffff [ 64.075207][ T6915] RBP: 0000000000000014 R08: 0000000000000000 R09: 0000000000000000 [ 64.083154][ T6915] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 64.091110][ T6915] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 65.171284][ T6915] Shutting down cpus with NMI [ 65.177141][ T6915] Kernel Offset: disabled [ 65.181523][ T6915] Rebooting in 86400 seconds..