From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f208.google.com (mail-oi1-f208.google.com [209.85.167.208]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E17A33A1A3F for ; Fri, 24 Jul 2026 20:10:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784923840; cv=none; b=j1rJxrdaiY80Yy1PTRRnnoOY/07NEiFKe9ksoPBXy6X8Xo+R5FQQ5BURZODEDwW33b5xrRncx24vdt9THMba7pnDwk4djU/BOcEVOrrj6/D0L+C7IYrR+gzdYCkL7tRVjJr/8qqYvOsEQPlzVRT9AHiOanyKPOqLWXPZbfzOZAo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784923840; c=relaxed/simple; bh=SdvW6zb2m0j165dVkhiU0MFdqA7uMn6Jt9IquwKsKnI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=lLSy8UCh7qUd5bBqibjMWZmT4FIt0cBSlFCVITnFgZVm0fK4IYAunL25LXnkCm+Uk9PJUiL9vEvucPSpzIt2+DHVTl3NLzFvZrHyojQve7+/3yVd2AS3f91sMHcZzuvyt5Mb9w2QfXa/ol8AdcmNjbULt6/zlCSJHztHQMILeFo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.167.208 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi1-f208.google.com with SMTP id 5614622812f47-4a4a7d0362eso772766b6e.0 for ; Fri, 24 Jul 2026 13:10:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784923837; x=1785528637; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=WFTPxAt1GEEhc/zfClnJ1YXcRiKawNFyGhEPqsDd3h8=; b=VxpCc45gjChNcpjYR2b4tCTBJJz5oIkC+tYGCXDHfTOt4hVPhuT33eAxeIXBhSSbqz vnPMvWmAlb/taWDdQVZ8e2Ri7SdQxGkZf6ragKHdUUPaqfnUKFDwhyDTxXrls6SbZH1Q KdykFdqLjqQc+GlCRjzU8MuRfEUwdTjjROhUeRIn7TgEZ+cV2KG1smZZUKYvg3viqIN6 3aFuydvut6FzMn1vezjgEeAC/5SQY92YC0JtczD31SaWRszkbWJLwmgKtgXO4k5oJGUM GQ957Odmzhl/oHPPaENxAKihUbnofTRj3wruJy1dtMkNrnVh1rLxapTSrmJ2gVQaP/8d oadw== X-Gm-Message-State: AOJu0YzfXC86nja93BThr7oUstHGoWgnZ3DLJfV6/YcqRGFBi7SQB5l/ wrrf5PxLCLH9v+IwimCOSoDLaWCH72c7O5ZwwKn0FwZXFisJxgbC1G7GmMBaQ7CmGQASLCgLS2w OfuKxcvg13Ssu68pVC5gKv0efz3zBs8vSQLH6kU4rjSBeuiEndZFDVETvyQtBYg== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:3501:b0:4a3:d66b:240b with SMTP id 5614622812f47-4ab353dca4cmr7373615b6e.18.1784923837729; Fri, 24 Jul 2026 13:10:37 -0700 (PDT) Date: Fri, 24 Jul 2026 13:10:37 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a63c6bd.a2ea2cc8.fbad6.0008.GAE@google.com> Subject: [syzbot] [media?] KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer (5) From: syzbot To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 48a5a7ab8d6a Merge tag 'v7.2-rc4-smb3-client-fixes' of git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11a21ab9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=cb43e758a4dc84dd467f compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-48a5a7ab.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8ed725bee82f/vmlinux-48a5a7ab.xz kernel image: https://storage.googleapis.com/syzbot-assets/110c09c210d5/bzImage-48a5a7ab.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cb43e758a4dc84dd467f@syzkaller.appspotmail.com ================================================================== BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_extras drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2439 [inline] BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_buffer+0x34d9/0x4160 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2707 Write of size 1 at addr ffffc9000579a000 by task vivid-000-vid-c/20070 CPU: 0 UID: 0 PID: 20070 Comm: vivid-000-vid-c Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595 tpg_fill_plane_extras drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2439 [inline] tpg_fill_plane_buffer+0x34d9/0x4160 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2707 vivid_fillbuff+0x963/0x3ff0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:470 vivid_thread_vid_cap_tick+0x81b/0x1470 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:629 vivid_thread_vid_cap+0x454/0xd70 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:767 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to a vmalloc virtual mapping Memory state around the buggy address: ffffc90005799f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90005799f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc9000579a000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc9000579a080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc9000579a100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup