Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.216' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.178368] ------------[ cut here ]------------ [ 33.183356] WARNING: CPU: 0 PID: 8084 at drivers/gpu/drm/drm_fourcc.c:204 drm_format_info.part.0+0x11/0x14 [ 33.193132] Kernel panic - not syncing: panic_on_warn set ... [ 33.193132] [ 33.200479] CPU: 0 PID: 8084 Comm: syz-executor361 Not tainted 4.19.211-syzkaller #0 [ 33.208336] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.217667] Call Trace: [ 33.220239] dump_stack+0x1fc/0x2ef [ 33.223847] panic+0x26a/0x50e [ 33.227019] ? __warn_printk+0xf3/0xf3 [ 33.230889] ? drm_format_info.part.0+0x11/0x14 [ 33.235538] ? __probe_kernel_read+0x130/0x1b0 [ 33.240102] ? __warn.cold+0x5/0x5a [ 33.243708] ? __warn+0xe4/0x200 [ 33.247052] ? drm_format_info.part.0+0x11/0x14 [ 33.251701] __warn.cold+0x20/0x5a [ 33.255220] ? drm_format_info.part.0+0x11/0x14 [ 33.259870] report_bug+0x262/0x2b0 [ 33.263479] do_error_trap+0x1d7/0x310 [ 33.267344] ? math_error+0x310/0x310 [ 33.271123] ? __irq_work_queue_local+0x101/0x160 [ 33.275944] ? irq_work_queue+0x29/0x80 [ 33.279906] ? error_entry+0x72/0xd0 [ 33.283599] ? trace_hardirqs_off_caller+0x6e/0x210 [ 33.288603] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.293428] invalid_op+0x14/0x20 [ 33.296864] RIP: 0010:drm_format_info.part.0+0x11/0x14 [ 33.302121] Code: fb e8 e4 52 64 f9 48 c7 c7 60 81 c4 88 e8 43 84 f5 ff 0f 0b e9 e3 5e d8 fb e8 cc 52 64 f9 48 c7 c7 40 89 c4 88 e8 2b 84 f5 ff <0f> 0b c3 e8 b8 52 64 f9 45 31 e4 e8 df ff ff ff e9 22 89 d8 fb e8 [ 33.321004] RSP: 0018:ffff888095717990 EFLAGS: 00010282 [ 33.326369] RAX: 0000000000000024 RBX: 0000000000000044 RCX: 0000000000000000 [ 33.333620] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012ae2f24 [ 33.340867] RBP: 0000000056555941 R08: 0000000000000024 R09: 0000000000000000 [ 33.348113] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 [ 33.355360] R13: 00000000a0203843 R14: dffffc0000000000 R15: ffff888095717c58 [ 33.362617] ? vprintk_func+0x81/0x180 [ 33.366489] drm_get_format_info.cold+0xd/0x12 [ 33.371052] drm_internal_framebuffer_create+0x32d/0xf00 [ 33.376480] ? is_bpf_text_address+0xd5/0x1b0 [ 33.380958] ? mark_held_locks+0xf0/0xf0 [ 33.384999] ? drm_framebuffer_check_src_coords+0x1a0/0x1a0 [ 33.390692] ? drm_dev_enter+0x110/0x110 [ 33.394733] ? lock_downgrade+0x720/0x720 [ 33.398862] drm_mode_addfb2+0x97/0x300 [ 33.402817] drm_ioctl_kernel+0x208/0x2a0 [ 33.406943] ? drm_internal_framebuffer_create+0xf00/0xf00 [ 33.412547] ? drm_ioctl_permit+0x210/0x210 [ 33.416847] ? __might_fault+0x192/0x1d0 [ 33.420891] drm_ioctl+0x5a0/0x9e0 [ 33.424414] ? drm_internal_framebuffer_create+0xf00/0xf00 [ 33.430013] ? drm_getstats+0x20/0x20 [ 33.433794] ? mark_held_locks+0xf0/0xf0 [ 33.437843] ? lock_downgrade+0x720/0x720 [ 33.441968] ? lock_acquire+0x170/0x3c0 [ 33.445937] ? debug_check_no_obj_freed+0xb5/0x490 [ 33.450864] ? drm_getstats+0x20/0x20 [ 33.454659] do_vfs_ioctl+0xcdb/0x12e0 [ 33.458534] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 33.463630] ? debug_check_no_obj_freed+0x201/0x490 [ 33.468633] ? ioctl_preallocate+0x200/0x200 [ 33.473022] ? putname+0xe1/0x120 [ 33.476456] ? putname+0xe1/0x120 [ 33.479886] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.484969] ? kmem_cache_free+0x226/0x260 [ 33.489184] ? putname+0xe1/0x120 [ 33.492618] ? do_sys_open+0x2bf/0x520 [ 33.496484] ? filp_open+0x70/0x70 [ 33.500004] ksys_ioctl+0x9b/0xc0 [ 33.503440] __x64_sys_ioctl+0x6f/0xb0 [ 33.507306] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.511875] do_syscall_64+0xf9/0x620 [ 33.515659] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.520827] RIP: 0033:0x7f49abca36d9 [ 33.524518] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 33.543570] RSP: 002b:00007ffc749d19f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 33.551257] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f49abca36d9 [ 33.558504] RDX: 0000000020000580 RSI: 00000000c06864b8 RDI: 0000000000000003 [ 33.565752] RBP: 00007f49abc63280 R08: 0000000000000000 R09: 0000000000000000 [ 33.573008] R10: 000000000000ffff R11: 0000000000000246 R12: 00007f49abc63310 [ 33.580257] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.587688] Kernel Offset: disabled [ 33.591342] Rebooting in 86400 seconds..