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Fri, 24 Oct 2025 16:10:29 -0700 (PDT) Date: Fri, 24 Oct 2025 16:10:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68fc0765.a00a0220.9662e.000e.GAE@google.com> From: syzbot To: chao@kernel.org, jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com X-Headers-End: 1vCQvg-0003ZG-71 Subject: [f2fs-dev] [syzbot] [f2fs?] WARNING in get_data X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net Hello, syzbot found the following issue on: HEAD commit: 72fb0170ef1f Add linux-next specific files for 20251024 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=13eb2d2f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=e812d103f45aa955 dashboard link: https://syzkaller.appspot.com/bug?extid=f5d91b1897d5b094c6b4 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15fc3b04580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/be1fa3d1f761/disk-72fb0170.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/57302bf7af40/vmlinux-72fb0170.xz kernel image: https://storage.googleapis.com/syzbot-assets/91c806bb2a2b/bzImage-72fb0170.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f5d91b1897d5b094c6b4@syzkaller.appspotmail.com vivid-000: DV Timings: 640x480p59 inactive vivid-000: DV Timings Aspect Ratio: Source Width x Height vivid-000: Maximum EDID Blocks: 2 vivid-000: Limited RGB Range (16-235): false vivid-000: Rx RGB Quantization Range: Automatic ------------[ cut here ]------------ WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x48a/0x840 kernel/printk/printk_ringbuffer.c:1278, CPU#1: syz.0.61/6175 Modules linked in: CPU: 1 UID: 0 PID: 6175 Comm: syz.0.61 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:get_data+0x48a/0x840 kernel/printk/printk_ringbuffer.c:1278 Code: 83 c4 f8 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 07 84 c0 0f 85 ee 01 00 00 44 89 65 00 49 83 c5 08 eb 13 e8 57 cd 1e 00 90 <0f> 0b 90 eb 05 e8 4c cd 1e 00 45 31 ed 4c 89 e8 48 83 c4 28 5b 41 RSP: 0018:ffffc90003bff440 EFLAGS: 00010093 RAX: ffffffff81a1ac59 RBX: 00003fffffffffff RCX: ffff888079e33c80 RDX: 0000000000000000 RSI: 00003fffffffffff RDI: 0000000000000000 RBP: 0000000000000012 R08: ffffc90003bff587 R09: 1ffff9200077feb0 R10: dffffc0000000000 R11: fffff5200077feb1 R12: 0000000000000012 R13: 0000000000000000 R14: ffffffff8e0327c0 R15: 1ffffffff1c0aa96 FS: 00007ff3c0d146c0(0000) GS:ffff888125ddc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff3bfd722e0 CR3: 0000000031710000 CR4: 00000000003526f0 Call Trace: prb_reserve_in_last+0x574/0x18f0 kernel/printk/printk_ringbuffer.c:1447 vprintk_store+0x641/0xd00 kernel/printk/printk.c:2273 vprintk_emit+0x15f/0x590 kernel/printk/printk.c:2399 _printk+0xcf/0x120 kernel/printk/printk.c:2448 log_ctrl drivers/media/v4l2-core/v4l2-ctrls-core.c:2718 [inline] v4l2_ctrl_handler_log_status+0x236/0x3b0 drivers/media/v4l2-core/v4l2-ctrls-core.c:2751 v4l2_ctrl_log_status+0x96/0xb0 drivers/media/v4l2-core/v4l2-ctrls-api.c:1260 vidioc_log_status+0x64/0x120 drivers/media/test-drivers/vivid/vivid-core.c:452 v4l_log_status+0x89/0xf0 drivers/media/v4l2-core/v4l2-ioctl.c:2640 __video_do_ioctl+0xa59/0xc10 drivers/media/v4l2-core/v4l2-ioctl.c:3129 video_usercopy+0x82d/0x1450 drivers/media/v4l2-core/v4l2-ioctl.c:3471 v4l2_ioctl+0x18d/0x1e0 drivers/media/v4l2-core/v4l2-dev.c:366 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff3bfd8efc9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff3c0d14038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff3bffe5fa0 RCX: 00007ff3bfd8efc9 RDX: 0000000000000000 RSI: 0000000000005646 RDI: 0000000000000003 RBP: 00007ff3bfe11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff3bffe6038 R14: 00007ff3bffe5fa0 R15: 00007ffed8034df8 --- 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 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. 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 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f206.google.com (mail-il1-f206.google.com [209.85.166.206]) (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 5957E2F5A27 for ; Fri, 24 Oct 2025 23:10:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761347432; cv=none; b=ou5PaFLsPY/X5O/yO8vQvlRYf2LQd33xenB/3Di46/dFApMJTZqbNy/SnYPt4l24ghGdDGnIk4dU9pZkrA2awccQwrlXfe6E9fpI7kYUTBIQXFIQfdS36m6pw+R8yHUN0HLNo5WBia4RbMWvZIJYwJk8Z59Wzks/VTeczdJ25UQ= ARC-Message-Signature:i=1; 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Fri, 24 Oct 2025 16:10:29 -0700 (PDT) Date: Fri, 24 Oct 2025 16:10:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68fc0765.a00a0220.9662e.000e.GAE@google.com> Subject: [syzbot] [f2fs?] WARNING in get_data From: syzbot To: chao@kernel.org, jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net, 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: 72fb0170ef1f Add linux-next specific files for 20251024 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=13eb2d2f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=e812d103f45aa955 dashboard link: https://syzkaller.appspot.com/bug?extid=f5d91b1897d5b094c6b4 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15fc3b04580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/be1fa3d1f761/disk-72fb0170.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/57302bf7af40/vmlinux-72fb0170.xz kernel image: https://storage.googleapis.com/syzbot-assets/91c806bb2a2b/bzImage-72fb0170.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f5d91b1897d5b094c6b4@syzkaller.appspotmail.com vivid-000: DV Timings: 640x480p59 inactive vivid-000: DV Timings Aspect Ratio: Source Width x Height vivid-000: Maximum EDID Blocks: 2 vivid-000: Limited RGB Range (16-235): false vivid-000: Rx RGB Quantization Range: Automatic ------------[ cut here ]------------ WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x48a/0x840 kernel/printk/printk_ringbuffer.c:1278, CPU#1: syz.0.61/6175 Modules linked in: CPU: 1 UID: 0 PID: 6175 Comm: syz.0.61 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:get_data+0x48a/0x840 kernel/printk/printk_ringbuffer.c:1278 Code: 83 c4 f8 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 07 84 c0 0f 85 ee 01 00 00 44 89 65 00 49 83 c5 08 eb 13 e8 57 cd 1e 00 90 <0f> 0b 90 eb 05 e8 4c cd 1e 00 45 31 ed 4c 89 e8 48 83 c4 28 5b 41 RSP: 0018:ffffc90003bff440 EFLAGS: 00010093 RAX: ffffffff81a1ac59 RBX: 00003fffffffffff RCX: ffff888079e33c80 RDX: 0000000000000000 RSI: 00003fffffffffff RDI: 0000000000000000 RBP: 0000000000000012 R08: ffffc90003bff587 R09: 1ffff9200077feb0 R10: dffffc0000000000 R11: fffff5200077feb1 R12: 0000000000000012 R13: 0000000000000000 R14: ffffffff8e0327c0 R15: 1ffffffff1c0aa96 FS: 00007ff3c0d146c0(0000) GS:ffff888125ddc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff3bfd722e0 CR3: 0000000031710000 CR4: 00000000003526f0 Call Trace: prb_reserve_in_last+0x574/0x18f0 kernel/printk/printk_ringbuffer.c:1447 vprintk_store+0x641/0xd00 kernel/printk/printk.c:2273 vprintk_emit+0x15f/0x590 kernel/printk/printk.c:2399 _printk+0xcf/0x120 kernel/printk/printk.c:2448 log_ctrl drivers/media/v4l2-core/v4l2-ctrls-core.c:2718 [inline] v4l2_ctrl_handler_log_status+0x236/0x3b0 drivers/media/v4l2-core/v4l2-ctrls-core.c:2751 v4l2_ctrl_log_status+0x96/0xb0 drivers/media/v4l2-core/v4l2-ctrls-api.c:1260 vidioc_log_status+0x64/0x120 drivers/media/test-drivers/vivid/vivid-core.c:452 v4l_log_status+0x89/0xf0 drivers/media/v4l2-core/v4l2-ioctl.c:2640 __video_do_ioctl+0xa59/0xc10 drivers/media/v4l2-core/v4l2-ioctl.c:3129 video_usercopy+0x82d/0x1450 drivers/media/v4l2-core/v4l2-ioctl.c:3471 v4l2_ioctl+0x18d/0x1e0 drivers/media/v4l2-core/v4l2-dev.c:366 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff3bfd8efc9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff3c0d14038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff3bffe5fa0 RCX: 00007ff3bfd8efc9 RDX: 0000000000000000 RSI: 0000000000005646 RDI: 0000000000000003 RBP: 00007ff3bfe11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff3bffe6038 R14: 00007ff3bffe5fa0 R15: 00007ffed8034df8 --- 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 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. 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