divide_error: 0000 [#1] SMP CPU: 0 PID: 2716 Comm: syz-executor.0 Not tainted 5.9.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:drm_mode_vrefresh+0x45/0x50 drivers/gpu/drm/drm_modes.c:775 Code: 17 e8 03 00 00 8d 34 12 a8 10 0f 45 d6 a8 20 0f b7 47 16 8d 34 09 0f 45 ce 66 83 f8 01 76 03 0f af c8 89 c8 d1 e8 01 d0 31 d2 f1 c3 0f 1f 84 00 00 00 00 00 48 85 ff 0f 84 40 01 00 00 48 8b RSP: 0018:ffffc90000e2fc78 EFLAGS: 00010246 RAX: 000000000001f400 RBX: ffffc90000e2fe58 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000800000 RDI: ffff88822b0ea100 RBP: 0000000000000000 R08: 000000000000003f R09: ffff88822b0ea100 R10: 0000000000000001 R11: ffff888232ae8660 R12: 0000000000000000 R13: ffff888232ec3d00 R14: ffff888232ae8000 R15: 00000000ffffffea FS: 00007f8d8f4446c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8d8f9234b8 CR3: 000000023070a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: drm_mode_debug_printmodeline+0x5/0x60 drivers/gpu/drm/drm_modes.c:56 drm_mode_setcrtc+0x5c1/0x710 drivers/gpu/drm/drm_crtc.c:641 drm_ioctl_kernel+0xa8/0xf0 drivers/gpu/drm/drm_ioctl.c:787 drm_ioctl+0x1f7/0x3bb drivers/gpu/drm/drm_ioctl.c:887 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x7c/0xb0 fs/ioctl.c:739 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f8d8f8c1ae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8d8f4440c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f8d8f9e0f80 RCX: 00007f8d8f8c1ae9 RDX: 0000000020000180 RSI: 00000000c06864a2 RDI: 0000000000000003 RBP: 00007f8d8f90d47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f8d8f9e0f80 R15: 00007ffc0ee0bfa8 Modules linked in: ---[ end trace 90c8b7976e0870ec ]--- RIP: 0010:drm_mode_vrefresh+0x45/0x50 drivers/gpu/drm/drm_modes.c:775 Code: 17 e8 03 00 00 8d 34 12 a8 10 0f 45 d6 a8 20 0f b7 47 16 8d 34 09 0f 45 ce 66 83 f8 01 76 03 0f af c8 89 c8 d1 e8 01 d0 31 d2 f1 c3 0f 1f 84 00 00 00 00 00 48 85 ff 0f 84 40 01 00 00 48 8b RSP: 0018:ffffc90000e2fc78 EFLAGS: 00010246 RAX: 000000000001f400 RBX: ffffc90000e2fe58 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000800000 RDI: ffff88822b0ea100 RBP: 0000000000000000 R08: 000000000000003f R09: ffff88822b0ea100 R10: 0000000000000001 R11: ffff888232ae8660 R12: 0000000000000000 R13: ffff888232ec3d00 R14: ffff888232ae8000 R15: 00000000ffffffea FS: 00007f8d8f4446c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8d8f9234b8 CR3: 000000023070a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e8 03 00 00 8d call 0x8d000008 5: 34 12 xor $0x12,%al 7: a8 10 test $0x10,%al 9: 0f 45 d6 cmovne %esi,%edx c: a8 20 test $0x20,%al e: 0f b7 47 16 movzwl 0x16(%rdi),%eax 12: 8d 34 09 lea (%rcx,%rcx,1),%esi 15: 0f 45 ce cmovne %esi,%ecx 18: 66 83 f8 01 cmp $0x1,%ax 1c: 76 03 jbe 0x21 1e: 0f af c8 imul %eax,%ecx 21: 89 c8 mov %ecx,%eax 23: d1 e8 shr %eax 25: 01 d0 add %edx,%eax 27: 31 d2 xor %edx,%edx * 29: f7 f1 div %ecx <-- trapping instruction 2b: c3 ret 2c: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 33: 00 34: 48 85 ff test %rdi,%rdi 37: 0f 84 40 01 00 00 je 0x17d 3d: 48 rex.W 3e: 8b .byte 0x8b