INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds. (2)

Status: upstream: reported on 2026/10/16 09:02
Labels: prio:normal
[Documentation on labels]
Reported-by: syzbot+e1f1982d3a90ea3e8cd6@syzkaller.appspotmail.com
First crash: 75d, last: 4h30m
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
e2d15113 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ✅ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds. (2) 2026/08/04 00:51 2026/08/04 00:51 2026/08/04 00:55 cb1adeae
▶ ▼ 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. (2) 0 (1) 2026/10/16 09:02
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds. -1 syz 44 236d 312d 0/29 auto-obsoleted due to no activity on 2026/05/02 16:17

Sample crash report:
INFO: The task syz.7.17472:13261 has been waiting for writeback completion for more than 190 seconds.
INFO: The task syz.7.17472:13261 has been waiting for writeback completion for more than 190 seconds.
INFO: The task syz.7.17472:13261 has been waiting for writeback completion for more than 191 seconds.

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/16 09:01 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 7a19f0cc94ad 3f2522c6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2026/10/14 17:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 22034497e30b 7321cd29 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2026/10/07 08:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 71c3e5409eef f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2026/08/17 16:58 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: The task syz.NUM.NUM:LINE has been waiting for writeback completion for more than NUM seconds.
2026/08/02 06:07 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e2d5e23967d0 e611ffe1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 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.