./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor375840945 <...> Warning: Permanently added '10.128.0.109' (ECDSA) to the list of known hosts. execve("./syz-executor375840945", ["./syz-executor375840945"], 0x7ffff5dbf6d0 /* 10 vars */) = 0 brk(NULL) = 0x5555561e3000 brk(0x5555561e3c40) = 0x5555561e3c40 arch_prctl(ARCH_SET_FS, 0x5555561e3300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor375840945", 4096) = 27 brk(0x555556204c40) = 0x555556204c40 brk(0x555556205000) = 0x555556205000 mprotect(0x7fca32267000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 openat(AT_FDCWD, "/dev/dri/card1", O_RDONLY) = 3 openat(AT_FDCWD, "/dev/dri/card1", O_RDONLY) = 4 ioctl(4, DRM_IOCTL_MODE_GETRESOURCES, 0x20000200) = 0 openat(AT_FDCWD, "/dev/dri/card1", O_RDONLY) = 5 ioctl(5, DRM_IOCTL_MODE_GETRESOURCES, 0x20000200) = 0 ioctl(5, DRM_IOCTL_MODE_GETCRTC, 0x20000080) = 0 [ 66.201159][ T5003] divide error: 0000 [#1] PREEMPT SMP KASAN [ 66.207073][ T5003] CPU: 1 PID: 5003 Comm: syz-executor375 Not tainted 6.4.0-rc6-syzkaller-00242-g1639fae5132b #0 [ 66.217467][ T5003] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 66.227513][ T5003] RIP: 0010:drm_mode_vrefresh+0x19d/0x1f0 [ 66.233237][ T5003] Code: e8 58 3c e3 fc 66 83 fb 01 76 09 e8 4d 40 e3 fc 44 0f af e3 e8 44 40 e3 fc 48 69 ed e8 03 00 00 44 89 e0 31 d2 d1 e8 48 01 e8 <49> f7 f4 49 89 c4 eb 03 45 31 e4 e8 23 40 e3 fc 44 89 e0 5b 5d 41 [ 66.252830][ T5003] RSP: 0018:ffffc90003bdfa00 EFLAGS: 00010206 [ 66.258886][ T5003] RAX: 000000000001f400 RBX: 0000000000000400 RCX: 0000000000000000 [ 66.266851][ T5003] RDX: 0000000000000000 RSI: ffffffff84a1069c RDI: 0000000000000003 [ 66.274809][ T5003] RBP: 000000000001f400 R08: 0000000000000003 R09: 0000000000000001 [ 66.282761][ T5003] R10: 0000000000000400 R11: ffffffff81d6ebf5 R12: 0000000000000000 [ 66.290720][ T5003] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000008 [ 66.298677][ T5003] FS: 00005555561e3300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 66.307592][ T5003] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.314158][ T5003] CR2: 00000000005fdeb8 CR3: 000000007b315000 CR4: 00000000003506e0 [ 66.322115][ T5003] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.330068][ T5003] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.338025][ T5003] Call Trace: [ 66.341287][ T5003] [ 66.344204][ T5003] ? die+0x32/0x90 [ 66.347918][ T5003] ? do_trap+0x1b2/0x3f0 [ 66.352144][ T5003] ? drm_mode_vrefresh+0x19d/0x1f0 [ 66.357244][ T5003] ? drm_mode_vrefresh+0x19d/0x1f0 [ 66.362338][ T5003] ? do_error_trap+0xb1/0x170 [ 66.366998][ T5003] ? drm_mode_vrefresh+0x19d/0x1f0 [ 66.372098][ T5003] ? exc_divide_error+0x3a/0x50 [ 66.376948][ T5003] ? drm_mode_vrefresh+0x19d/0x1f0 [ 66.382045][ T5003] ? asm_exc_divide_error+0x1a/0x20 [ 66.387238][ T5003] ? kasan_set_track+0x25/0x30 [ 66.391990][ T5003] ? drm_mode_vrefresh+0x18c/0x1f0 [ 66.397085][ T5003] ? drm_mode_vrefresh+0x19d/0x1f0 [ 66.402182][ T5003] drm_mode_debug_printmodeline+0x22c/0x2f0 [ 66.408064][ T5003] drm_mode_setcrtc+0x116b/0x1650 [ 66.413077][ T5003] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 66.419046][ T5003] ? drm_mode_getcrtc+0x830/0x830 [ 66.424053][ T5003] ? find_held_lock+0x2d/0x110 [ 66.428807][ T5003] ? do_raw_spin_unlock+0x175/0x230 [ 66.433995][ T5003] drm_ioctl_kernel+0x281/0x4e0 [ 66.438828][ T5003] ? drm_mode_getcrtc+0x830/0x830 [ 66.443835][ T5003] ? drm_setversion+0x8a0/0x8a0 [ 66.448668][ T5003] ? drm_mode_getcrtc+0x830/0x830 [ 66.453675][ T5003] drm_ioctl+0x577/0xb30 [ 66.457901][ T5003] ? drm_ioctl_kernel+0x4e0/0x4e0 [ 66.462912][ T5003] ? bpf_lsm_file_ioctl+0x9/0x10 [ 66.467837][ T5003] ? drm_ioctl_kernel+0x4e0/0x4e0 [ 66.472846][ T5003] __x64_sys_ioctl+0x197/0x210 [ 66.477619][ T5003] do_syscall_64+0x39/0xb0 [ 66.482020][ T5003] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 66.487903][ T5003] RIP: 0033:0x7fca321fac59 [ 66.492298][ T5003] 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 [ 66.511890][ T5003] RSP: 002b:00007fff9cb913d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 66.520286][ T5003] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fca321fac59 [ 66.528242][ T5003] RDX: 0000000020000180 RSI: 00000000c06864a2 RDI: 0000000000000003 [ 66.536199][ T5003] RBP: 00007fca321ba4d0 R08: 00000000fffff4e6 R09: 0000000000000000 [ 66.544153][ T5003] R10: 0000000000000003 R11: 0000000000000246 R12: 00007fca321ba560 [ 66.552105][ T5003] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 66.560065][ T5003] [ 66.563067][ T5003] Modules linked in: [ 66.567229][ T5003] ---[ end trace 0000000000000000 ]--- [ 66.572698][ T5003] RIP: 0010:drm_mode_vrefresh+0x19d/0x1f0 [ 66.578495][ T5003] Code: e8 58 3c e3 fc 66 83 fb 01 76 09 e8 4d 40 e3 fc 44 0f af e3 e8 44 40 e3 fc 48 69 ed e8 03 00 00 44 89 e0 31 d2 d1 e8 48 01 e8 <49> f7 f4 49 89 c4 eb 03 45 31 e4 e8 23 40 e3 fc 44 89 e0 5b 5d 41 [ 66.598142][ T5003] RSP: 0018:ffffc90003bdfa00 EFLAGS: 00010206 [ 66.604230][ T5003] RAX: 000000000001f400 RBX: 0000000000000400 RCX: 0000000000000000 [ 66.612183][ T5003] RDX: 0000000000000000 RSI: ffffffff84a1069c RDI: 0000000000000003 [ 66.620165][ T5003] RBP: 000000000001f400 R08: 0000000000000003 R09: 0000000000000001 [ 66.628156][ T5003] R10: 0000000000000400 R11: ffffffff81d6ebf5 R12: 0000000000000000 [ 66.636137][ T5003] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000008 [ 66.644121][ T5003] FS: 00005555561e3300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 66.653063][ T5003] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.659648][ T5003] CR2: 00000000005fdeb8 CR3: 000000007b315000 CR4: 00000000003506e0 [ 66.667633][ T5003] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.675631][ T5003] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.683634][ T5003] Kernel panic - not syncing: Fatal exception [ 66.689857][ T5003] Kernel Offset: disabled [ 66.694182][ T5003] Rebooting in 86400 seconds..