R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffcde6828ff R14: 00007fecfe62c300 R15: 0000000000022000 ================================================================== BUG: KASAN: out-of-bounds in memset include/linux/fortify-string.h:209 [inline] BUG: KASAN: out-of-bounds in virtio_gpu_cmd_set_scanout+0xc5/0x280 drivers/gpu/drm/virtio/virtgpu_vq.c:563 Write of size 48 at addr fffffffffffffff4 by task syz-executor.2/29244 CPU: 2 PID: 29244 Comm: syz-executor.2 Not tainted 5.15.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xf/0x2d6 mm/kasan/report.c:256 __kasan_report mm/kasan/report.c:442 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:459 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 memset+0x20/0x40 mm/kasan/shadow.c:44 memset include/linux/fortify-string.h:209 [inline] virtio_gpu_cmd_set_scanout+0xc5/0x280 drivers/gpu/drm/virtio/virtgpu_vq.c:563 virtio_gpu_primary_plane_update+0x33a/0x1650 drivers/gpu/drm/virtio/virtgpu_plane.c:186 drm_atomic_helper_commit_planes+0x332/0xb60 drivers/gpu/drm/drm_atomic_helper.c:2552 drm_atomic_helper_commit_tail+0x62/0xf0 drivers/gpu/drm/drm_atomic_helper.c:1582 commit_tail+0x32d/0x420 drivers/gpu/drm/drm_atomic_helper.c:1667 drm_atomic_helper_commit drivers/gpu/drm/drm_atomic_helper.c:1884 [inline] drm_atomic_helper_commit+0x2eb/0x370 drivers/gpu/drm/drm_atomic_helper.c:1817 drm_atomic_commit+0xd8/0x110 drivers/gpu/drm/drm_atomic.c:1412 drm_client_modeset_commit_atomic+0x685/0x7c0 drivers/gpu/drm/drm_client_modeset.c:1043 drm_client_modeset_dpms+0x170/0x200 drivers/gpu/drm/drm_client_modeset.c:1224 drm_fb_helper_dpms drivers/gpu/drm/drm_fb_helper.c:324 [inline] drm_fb_helper_blank+0xc6/0x250 drivers/gpu/drm/drm_fb_helper.c:345 fb_blank+0x101/0x190 drivers/video/fbdev/core/fbmem.c:1079 do_fb_ioctl+0x5e2/0x690 drivers/video/fbdev/core/fbmem.c:1165 fb_ioctl+0xe7/0x150 drivers/video/fbdev/core/fbmem.c:1189 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fed010b6ae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fecfe62c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fed011c9f60 RCX: 00007fed010b6ae9 RDX: 0000000000000003 RSI: 0000000000004611 RDI: 0000000000000003 RBP: 00007fecfe62c1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffcde6828ff R14: 00007fecfe62c300 R15: 0000000000022000 Memory state around the buggy address: fffffffffffffe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffffffffff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffffffffffff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 general protection fault, maybe for address 0xffffc90003fa7654: 0000 [#1] PREEMPT SMP KASAN CPU: 2 PID: 29244 Comm: syz-executor.2 Not tainted 5.15.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:55 Code: cc cc cc cc eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe RSP: 0018:ffffc90003fa7648 EFLAGS: 00010086 RAX: ffffc90003fa7654 RBX: 0000000000000000 RCX: 0000000000000010 RDX: 0000000000000010 RSI: dffffc0000000000 RDI: ffffc90003fa7654 RBP: fffffffffffffff4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff83f5b373 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000080 R14: ffffffff84621555 R15: 0000000000000000 FS: 00007fecfe62c700(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fecfe62bf78 CR3: 000000007948b000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: print_memory_metadata+0x5a/0xdf mm/kasan/report.c:322 __kasan_report mm/kasan/report.c:444 [inline] kasan_report.cold+0x99/0xdf mm/kasan/report.c:459 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 memset+0x20/0x40 mm/kasan/shadow.c:44 memset include/linux/fortify-string.h:209 [inline] virtio_gpu_cmd_set_scanout+0xc5/0x280 drivers/gpu/drm/virtio/virtgpu_vq.c:563 virtio_gpu_primary_plane_update+0x33a/0x1650 drivers/gpu/drm/virtio/virtgpu_plane.c:186 drm_atomic_helper_commit_planes+0x332/0xb60 drivers/gpu/drm/drm_atomic_helper.c:2552 drm_atomic_helper_commit_tail+0x62/0xf0 drivers/gpu/drm/drm_atomic_helper.c:1582 commit_tail+0x32d/0x420 drivers/gpu/drm/drm_atomic_helper.c:1667 drm_atomic_helper_commit drivers/gpu/drm/drm_atomic_helper.c:1884 [inline] drm_atomic_helper_commit+0x2eb/0x370 drivers/gpu/drm/drm_atomic_helper.c:1817 drm_atomic_commit+0xd8/0x110 drivers/gpu/drm/drm_atomic.c:1412 drm_client_modeset_commit_atomic+0x685/0x7c0 drivers/gpu/drm/drm_client_modeset.c:1043 drm_client_modeset_dpms+0x170/0x200 drivers/gpu/drm/drm_client_modeset.c:1224 drm_fb_helper_dpms drivers/gpu/drm/drm_fb_helper.c:324 [inline] drm_fb_helper_blank+0xc6/0x250 drivers/gpu/drm/drm_fb_helper.c:345 fb_blank+0x101/0x190 drivers/video/fbdev/core/fbmem.c:1079 do_fb_ioctl+0x5e2/0x690 drivers/video/fbdev/core/fbmem.c:1165 fb_ioctl+0xe7/0x150 drivers/video/fbdev/core/fbmem.c:1189 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fed010b6ae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fecfe62c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fed011c9f60 RCX: 00007fed010b6ae9 RDX: 0000000000000003 RSI: 0000000000004611 RDI: 0000000000000003 RBP: 00007fecfe62c1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffcde6828ff R14: 00007fecfe62c300 R15: 0000000000022000 Modules linked in: ---[ end trace 5b2d51bd6928c984 ]--- RIP: 0010:memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:55 Code: cc cc cc cc eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe RSP: 0018:ffffc90003fa7648 EFLAGS: 00010086 RAX: ffffc90003fa7654 RBX: 0000000000000000 RCX: 0000000000000010 RDX: 0000000000000010 RSI: dffffc0000000000 RDI: ffffc90003fa7654 RBP: fffffffffffffff4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff83f5b373 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000080 R14: ffffffff84621555 R15: 0000000000000000 FS: 00007fecfe62c700(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fecfe62bf78 CR3: 000000007948b000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: cc int3 1: cc int3 2: cc int3 3: cc int3 4: eb 1e jmp 0x24 6: 0f 1f 00 nopl (%rax) 9: 48 89 f8 mov %rdi,%rax c: 48 89 d1 mov %rdx,%rcx f: 48 c1 e9 03 shr $0x3,%rcx 13: 83 e2 07 and $0x7,%edx 16: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi) 19: 89 d1 mov %edx,%ecx 1b: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) 1d: c3 retq 1e: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 24: 48 89 f8 mov %rdi,%rax 27: 48 89 d1 mov %rdx,%rcx * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: c3 retq 2d: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 34: 48 89 f8 mov %rdi,%rax 37: 48 83 fa 20 cmp $0x20,%rdx 3b: 72 7e jb 0xbb 3d: 40 38 fe cmp %dil,%sil