From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f79.google.com (mail-io1-f79.google.com [209.85.166.79]) (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 17844205AD1 for ; Wed, 12 Feb 2025 09:11:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739351495; cv=none; b=lZmWixdVavLa3el8wSrCtGOfqVEyclq9UQDV9AmUmYbmuIyUf1FiBN+Ti9NI23UjTjkm4vyvGJlMLHg3Kxc28lbWXy+PA9Cjn2NlHxEevG2/+mzwOQWqy70cM2morV5051ay2mMCJN8psuHsMVNKZP+EnZTl3iea+kdwRbHn7WM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739351495; c=relaxed/simple; bh=mRFr9dHoNaZOTzl2wK/QQQdK0Bksa5htD9RvTKZTVV0=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; 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:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=tX8ICBEA9DhqP5/OE0dzRIYxBJhxkdbhRUL3n3qp3N0=; b=qDP8yiSnajygyq75YOUlGFKMZbWYFwkFALgoHP3X8bigr5U6wys8h7xZE6HXJejuGm qOFoggRL0j3BUTM/HgUXWwPcpu8i0cbOTr+Pu4KCy6W320uao69alJMmkPZtKnga+JGT qAa6Kx3DfjFXXXQaUo8n7bLBWVl0unvh3NaQGEQRVjRCdIozN+XqYkGe1jpwSgjEfmZ/ uMlMZcloq+JGMKhuaRGh6NC/uzVONOuivhYTyQVAuRKs4DBYtgcXtff6JhZc8MC57W8Q hv/LSG/3SCQUQuoF0dtexzN1rO7rekgifzRLq7M1n/RJtYr9iHm3nXOeqOS5myM3UuRA ClKQ== X-Gm-Message-State: AOJu0YwUyuwEO72HsD801fkQhzCni+ySkshlaYDXm9P+XXQH7kvP6ZXA DAPKsdGBy0766rEBosc1JYwJ5A7WNOhPCqODhdjLec40xG4NxwMkg4Iwtj3ZQql9n3IPb69sw6e qA+iiswyWY69mDSz+Q94iGj0xZB5BMwUPC4iCMYyp6liBv1ZVWo7K62s03g== X-Google-Smtp-Source: AGHT+IFJrZpM07QzXjdHerSi56dF+sYefPJzcOy/S9CxIdfsBdd1UhGeJOZcjullwHrQSYTGGWCS/8VLFBsgTVMjQqR0xAsqwb7l Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1888:b0:3cf:f9e0:f4ae with SMTP id e9e14a558f8ab-3d17be272e3mr21380595ab.6.1739351493127; Wed, 12 Feb 2025 01:11:33 -0800 (PST) Date: Wed, 12 Feb 2025 01:11:33 -0800 In-Reply-To: <000000000000c34595061d6db440@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67ac65c5.050a0220.3d72c.0132.GAE@google.com> Subject: Re: [syzbot] [media?] KASAN: vmalloc-out-of-bounds Write in tpg_fill_plane_buffer (3) 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" syzbot has found a reproducer for the following issue on: HEAD commit: 09fbf3d50205 Merge tag 'tomoyo-pr-20250211' of git://git.c.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=167e4718580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3c2347dd6174fbe2 dashboard link: https://syzkaller.appspot.com/bug?extid=365005005522b70a36f2 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15d28aa4580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1493a3f8580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-09fbf3d5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/835b3d29c46c/vmlinux-09fbf3d5.xz kernel image: https://storage.googleapis.com/syzbot-assets/ff4bfd8a5d42/bzImage-09fbf3d5.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+365005005522b70a36f2@syzkaller.appspotmail.com ================================================================== BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2608 [inline] BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_buffer+0x1a9c/0x5af0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705 Write of size 1440 at addr ffffc9000d0ffda0 by task vivid-000-vid-c/5304 CPU: 0 UID: 0 PID: 5304 Comm: vivid-000-vid-c Not tainted 6.14.0-rc2-syzkaller-00039-g09fbf3d50205 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2608 [inline] tpg_fill_plane_buffer+0x1a9c/0x5af0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705 vivid_fillbuff drivers/media/test-drivers/vivid/vivid-kthread-cap.c:470 [inline] vivid_thread_vid_cap_tick+0xf8e/0x60d0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:629 vivid_thread_vid_cap+0x8aa/0xf30 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:767 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The buggy address belongs to the virtual mapping at [ffffc9000d0e9000, ffffc9000d101000) created by: vb2_vmalloc_alloc+0xf2/0x340 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x43e47 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) raw: 04fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 5303, tgid 5303 (syz-executor881), ts 69776556067, free_ts 68046210271 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270 alloc_frozen_pages_noprof mm/mempolicy.c:2341 [inline] alloc_pages_noprof+0x121/0x190 mm/mempolicy.c:2361 vm_area_alloc_pages mm/vmalloc.c:3591 [inline] __vmalloc_area_node mm/vmalloc.c:3669 [inline] __vmalloc_node_range_noprof+0x9c6/0x1380 mm/vmalloc.c:3846 vmalloc_user_noprof+0x74/0x80 mm/vmalloc.c:4000 vb2_vmalloc_alloc+0xf2/0x340 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:242 [inline] __vb2_queue_alloc+0xa0b/0x16f0 drivers/media/common/videobuf2/videobuf2-core.c:523 vb2_core_reqbufs+0xd2e/0x17c0 drivers/media/common/videobuf2/videobuf2-core.c:964 __vb2_init_fileio+0x319/0xf90 drivers/media/common/videobuf2/videobuf2-core.c:2895 __vb2_perform_fileio+0x31a/0x17b0 drivers/media/common/videobuf2/videobuf2-core.c:3041 vb2_fop_read+0x247/0x330 drivers/media/common/videobuf2/videobuf2-v4l2.c:1215 v4l2_read+0x1a4/0x2c0 drivers/media/v4l2-core/v4l2-dev.c:316 vfs_read+0x1f8/0xb40 fs/read_write.c:563 ksys_read+0x18f/0x2b0 fs/read_write.c:708 page last free pid 5290 tgid 5290 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660 discard_slab mm/slub.c:2684 [inline] __put_partials+0x160/0x1c0 mm/slub.c:3153 put_cpu_partial+0x17c/0x250 mm/slub.c:3228 __slab_free+0x290/0x380 mm/slub.c:4479 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171 vm_area_dup+0x27/0x290 kernel/fork.c:487 __split_vma+0x1cb/0xc50 mm/vma.c:466 vms_gather_munmap_vmas+0x2e6/0x1600 mm/vma.c:1268 do_vmi_align_munmap+0x3ff/0x6f0 mm/vma.c:1436 do_vmi_munmap+0x24e/0x2d0 mm/vma.c:1493 __vm_munmap+0x372/0x510 mm/vma.c:2951 __do_sys_munmap mm/mmap.c:1084 [inline] __se_sys_munmap mm/mmap.c:1081 [inline] __x64_sys_munmap+0x60/0x70 mm/mmap.c:1081 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 Memory state around the buggy address: ffffc9000d0fff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9000d0fff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc9000d100000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc9000d100080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc9000d100100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ================================================================== --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.