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Message-ID: <CACT4Y+ZvEjpX8a9VW4tS1YSP8RE6xjb8C9ae6PcSa0rr-q+62g@mail.gmail.com> Date: Mon, 16 Sep 2024 15:28:33 +0200 From: Dmitry Vyukov <dvyukov@...gle.com> To: Bart Van Assche <bvanassche@....org> Cc: syzbot <syzbot+38e6635a03c83c76297a@...kaller.appspotmail.com>, adilger.kernel@...ger.ca, alim.akhtar@...sung.com, avri.altman@....com, beanhuo@...ron.com, hdanton@...a.com, jejb@...ux.ibm.com, linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org, martin.petersen@...cle.com, syzkaller-bugs@...glegroups.com, tytso@....edu, wsa+renesas@...g-engineering.com, syzkaller <syzkaller@...glegroups.com> Subject: Re: [syzbot] [ext4?] INFO: task hung in ext4_evict_ea_inode On Fri, 3 Feb 2023 at 19:11, Bart Van Assche <bvanassche@....org> wrote: > > On 2/3/23 00:53, syzbot wrote: > > syzbot has bisected this issue to: > > > > commit 82ede9c19839079e7953a47895729852a440080c > > Author: Wolfram Sang <wsa+renesas@...g-engineering.com> > > Date: Tue Jun 21 14:46:53 2022 +0000 > > > > scsi: ufs: core: Fix typos in error messages > > To the syzbot maintainers: I think this is a good example of a bisection > result that is wrong. It is unlikely that fixing typos in kernel > messages would affect whether or not the kernel hangs. Additionally, as > far as I know, the systems used by syzbot (Google Compute Engine virtual > machines) do trigger any code in the UFS driver. Hi Bart, syzbot has logic to detect commits that don't affect builds. It hashes SHF_ALLOC vmlinux sections to check if the commit actually has any effect on the binary: https://github.com/google/syzkaller/blob/c673ca06b23cea94091ab496ef62c3513e434585/pkg/build/linux.go#L253-L286 Bug CONFIG_UFS_FS is enabled on syzbot, it has some coverage for it, and strings affect the binary (can actually be the root cause for bugs). So I don't see what else can be done here automatically.
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