Created attachment 305546 [details]
syzkaller report

I have identified a memory leak issue in the Linux Kernel version 5.10 (v5.10.199) related to p9pdu_readf.

This bug was previously discussed in this conversation
https://lore.kernel.org/all/20231027030302.11927-1-hbh25y@gmail.com/
and subsequently fixed in this commit, titled "9p/net: fix possible memory leak in p9_check_errors()".
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ce07087964208eee2ca2f9ee4a98f8b5d9027fe6

However, the fix was not backported to the 5.10 kernel version.

To address this, I am planning to backport the fix to kernel version 5.10. The backport will resolve the issue, as confirmed by the reproducer tests.

Attached are the syzkaller report (report.txt), syz-repro (repro.syz), and C-repro (repro.c), demonstrating the issue.