From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0DB51C433EF for ; Mon, 6 Dec 2021 12:28:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 06C1073FAA; Mon, 6 Dec 2021 12:28:46 +0000 (UTC) Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) by gabe.freedesktop.org (Postfix) with ESMTPS id BCB1E6E135 for ; Sat, 4 Dec 2021 09:55:18 +0000 (UTC) Received: by mail-io1-f70.google.com with SMTP id 85-20020a6b0258000000b005ed47a95f03so4518802ioc.0 for ; Sat, 04 Dec 2021 01:55:18 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=+J1qB2+49Im0EdmYLOfWiB0MLUw0lYYruCB9JuWbtuw=; b=tTweVeSjSehLCaeYQcd+OxgWJDzwGrB077Vdcy2m2LgRUaX04G1hUuP45uNV0AFhoO Y/SH1mVJ8Ty9//c77+g7Hd5X/g4Ccd/jhYP3TAWpnytgR0Vyv1JXLyn6SB5TQ13QlSIz RFN8Nd0xWOsfgv5QQpwKI/pIKms+COTI8LOrG65CJyGoK3wklrxkFg5WBGiWlWB+c2h7 y6g1tN78sxnr9O500u+HUGv3/Gq+/KUPXgXwgFskZGCmI6gWoyUifuS/x5CQD7YKjMp2 0Cgf5oMpnoSeVVeMVEKTXIMKW8uG6eiIXXKfFQ4ttgOU4Zvjr2XkRWwdI2kMiZSPrqpT XV4Q== X-Gm-Message-State: AOAM533kyJndTqFY928aQOStohS40sa6jPPz5av9zV2UOzzCEVrlmCYv bJaOWfBmQtHFBIVvmiJho++5M7EewwK518CiRurHap2FGpWF X-Google-Smtp-Source: ABdhPJxpdSl19Wc1+2UwAjyN9FL6e2TTzFsOgSkv+B2wKH2hfC55afG+DZWoWox1lThLLCVAyltLIsO7EZAST6BUQgoZgujD34+j MIME-Version: 1.0 X-Received: by 2002:a6b:7307:: with SMTP id e7mr24491133ioh.211.1638611718158; Sat, 04 Dec 2021 01:55:18 -0800 (PST) Date: Sat, 04 Dec 2021 01:55:18 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000062bce805d24f05ca@google.com> Subject: [syzbot] KASAN: out-of-bounds Write in virtio_gpu_cmd_transfer_to_host_2d From: syzbot To: airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, kraxel@redhat.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, virtualization@lists.linux-foundation.org Content-Type: text/plain; charset="UTF-8" X-Mailman-Approved-At: Mon, 06 Dec 2021 12:28:45 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hello, syzbot found the following issue on: HEAD commit: e66435936756 mm: fix mismerge of folio page flag manipulat.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14c79e0eb00000 kernel config: https://syzkaller.appspot.com/x/.config?x=ca1c2027dfeaf335 dashboard link: https://syzkaller.appspot.com/bug?extid=f01248cf57e6929868e4 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f01248cf57e6929868e4@syzkaller.appspotmail.com R13: 00007ffe6190e50f R14: 00007f51be874300 R15: 0000000000022000 ================================================================== BUG: KASAN: out-of-bounds in memset include/linux/fortify-string.h:175 [inline] BUG: KASAN: out-of-bounds in virtio_gpu_cmd_transfer_to_host_2d+0x160/0x4a0 drivers/gpu/drm/virtio/virtgpu_vq.c:618 Write of size 56 at addr fffffffffffffff4 by task syz-executor.1/13670 CPU: 2 PID: 13670 Comm: syz-executor.1 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:175 [inline] virtio_gpu_cmd_transfer_to_host_2d+0x160/0x4a0 drivers/gpu/drm/virtio/virtgpu_vq.c:618 virtio_gpu_update_dumb_bo drivers/gpu/drm/virtio/virtgpu_plane.c:128 [inline] virtio_gpu_primary_plane_update+0xfcb/0x1650 drivers/gpu/drm/virtio/virtgpu_plane.c:199 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_commit_locked+0x145/0x580 drivers/gpu/drm/drm_client_modeset.c:1146 drm_client_modeset_commit+0x4d/0x80 drivers/gpu/drm/drm_client_modeset.c:1172 __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:252 [inline] __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:231 [inline] drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:279 [inline] drm_fb_helper_lastclose drivers/gpu/drm/drm_fb_helper.c:1997 [inline] drm_fbdev_client_restore+0xe3/0x1a0 drivers/gpu/drm/drm_fb_helper.c:2397 drm_client_dev_restore+0x184/0x290 drivers/gpu/drm/drm_client.c:226 drm_lastclose drivers/gpu/drm/drm_file.c:467 [inline] drm_release+0x441/0x530 drivers/gpu/drm/drm_file.c:498 __fput+0x286/0x9f0 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f51c12b1a04 Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44 RSP: 002b:00007f51be873cc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffea RBX: 6666666666666667 RCX: 00007f51c12b1a04 RDX: 000000000000ff00 RSI: 00007f51be873d60 RDI: 00000000ffffff9c RBP: 00007f51be873d60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000ff00 R13: 00007ffe6190e50f R14: 00007f51be874300 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 0xffffc9000422f80c: 0000 [#1] PREEMPT SMP KASAN CPU: 2 PID: 13670 Comm: syz-executor.1 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:ffffc9000422f800 EFLAGS: 00010086 RAX: ffffc9000422f80c RBX: 0000000000000000 RCX: 0000000000000010 RDX: 0000000000000010 RSI: dffffc0000000000 RDI: ffffc9000422f80c RBP: fffffffffffffff4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff83f599a3 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000080 R14: ffffffff84620a60 R15: 0000000000000000 FS: 00007f51be874700(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f51be873f78 CR3: 0000000077e04000 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:175 [inline] virtio_gpu_cmd_transfer_to_host_2d+0x160/0x4a0 drivers/gpu/drm/virtio/virtgpu_vq.c:618 virtio_gpu_update_dumb_bo drivers/gpu/drm/virtio/virtgpu_plane.c:128 [inline] virtio_gpu_primary_plane_update+0xfcb/0x1650 drivers/gpu/drm/virtio/virtgpu_plane.c:199 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_commit_locked+0x145/0x580 drivers/gpu/drm/drm_client_modeset.c:1146 drm_client_modeset_commit+0x4d/0x80 drivers/gpu/drm/drm_client_modeset.c:1172 __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:252 [inline] __drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:231 [inline] drm_fb_helper_restore_fbdev_mode_unlocked drivers/gpu/drm/drm_fb_helper.c:279 [inline] drm_fb_helper_lastclose drivers/gpu/drm/drm_fb_helper.c:1997 [inline] drm_fbdev_client_restore+0xe3/0x1a0 drivers/gpu/drm/drm_fb_helper.c:2397 drm_client_dev_restore+0x184/0x290 drivers/gpu/drm/drm_client.c:226 drm_lastclose drivers/gpu/drm/drm_file.c:467 [inline] drm_release+0x441/0x530 drivers/gpu/drm/drm_file.c:498 __fput+0x286/0x9f0 fs/file_table.c:280 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f51c12b1a04 Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44 RSP: 002b:00007f51be873cc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffea RBX: 6666666666666667 RCX: 00007f51c12b1a04 RDX: 000000000000ff00 RSI: 00007f51be873d60 RDI: 00000000ffffff9c RBP: 00007f51be873d60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000ff00 R13: 00007ffe6190e50f R14: 00007f51be874300 R15: 0000000000022000 Modules linked in: ---[ end trace f65df7177f1d34a7 ]--- 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:ffffc9000422f800 EFLAGS: 00010086 RAX: ffffc9000422f80c RBX: 0000000000000000 RCX: 0000000000000010 RDX: 0000000000000010 RSI: dffffc0000000000 RDI: ffffc9000422f80c RBP: fffffffffffffff4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff83f599a3 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000080 R14: ffffffff84620a60 R15: 0000000000000000 FS: 00007f51be874700(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f51be873f78 CR3: 0000000077e04000 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 --- This report is generated by a bot. 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