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INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.

Status: upstream: reported syz repro on 2025/12/07 18:30
Reported-by: syzbot+bafa7d42e5d90ab3388c@syzkaller.appspotmail.com
First crash: 55d, last: 3d00h
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds. 0 (1) 2025/12/07 18:30
▶ ▼ Last patch testing requests (4)
Created Duration User Patch Repo Result
2026/01/11 17:05 15m retest repro upstream report log
2026/01/11 17:05 29m retest repro upstream report log
2026/01/11 17:05 27m retest repro upstream report log
2026/01/11 17:05 15m retest repro upstream report log

Sample crash report:
INFO: The task syz.3.18:3669 has been waiting for writeback completion for more than 1 seconds.

Crashes (33):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/13 13:49 upstream b71e635feefc 56f88057 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/28 17:00 upstream d26143bb38e2 5dc09de1 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/20 03:14 upstream dd9b004b7ff3 e14dbeb9 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/10 18:51 upstream c9b47175e913 48b27acc .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/04 11:08 upstream a619fe35ab41 cee4cb10 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2026/01/25 12:51 upstream 5dbeeb268b63 40acda8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2026/01/25 12:27 upstream 5dbeeb268b63 40acda8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2026/01/17 23:59 upstream d3eeb99bbc99 56f88057 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2026/01/13 10:43 upstream b71e635feefc 56f88057 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/28 11:05 upstream d26143bb38e2 5dc09de1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/28 11:03 upstream d26143bb38e2 5dc09de1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/28 11:01 upstream d26143bb38e2 5dc09de1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/28 10:58 upstream d26143bb38e2 5dc09de1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/19 21:34 upstream dd9b004b7ff3 e14dbeb9 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/19 21:33 upstream dd9b004b7ff3 e14dbeb9 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/19 21:32 upstream dd9b004b7ff3 e14dbeb9 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/14 15:42 upstream 8f0b4cce4481 a066d2bc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/14 02:23 upstream 9d9c1cfec01c a066d2bc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/13 13:07 upstream 9551a26f17d9 a066d2bc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/10 16:25 upstream c9b47175e913 48b27acc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/10 16:23 upstream c9b47175e913 48b27acc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/10 16:21 upstream c9b47175e913 48b27acc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/10 16:21 upstream c9b47175e913 48b27acc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/10 16:18 upstream c9b47175e913 48b27acc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/10 13:31 upstream c9b47175e913 48b27acc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/10 00:15 upstream cb015814f8b6 fc20f974 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/10 00:15 upstream cb015814f8b6 fc20f974 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/09 10:03 upstream cfd4039213e7 fc20f974 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/08 04:27 upstream 67a454e6b1c6 cee4cb10 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/06 12:01 upstream 3af870aedbff cee4cb10 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/05 08:52 upstream b0206c4eb637 cee4cb10 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/04 05:58 upstream a619fe35ab41 cee4cb10 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2025/12/03 18:21 upstream 3f9f0252130e 98d1f71f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
* Struck through repros no longer work on HEAD.