Re: [syzbot] [udf?] general protection fault in udf_read_folio

From: Gianfranco Trad
Date: Mon Oct 21 2024 - 20:19:40 EST


On 22/10/24 02:04, syzbot wrote:
Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+ddf8715339c89280b6fc@xxxxxxxxxxxxxxxxxxxxxxxxx
Tested-by: syzbot+ddf8715339c89280b6fc@xxxxxxxxxxxxxxxxxxxxxxxxx

Tested on:

commit: c2ee9f59 KVM: selftests: Fix build on on non-x86 archi..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12684640580000
kernel config: https://syzkaller.appspot.com/x/.config?x=fc6f8ce8c5369043
dashboard link: https://syzkaller.appspot.com/bug?extid=ddf8715339c89280b6fc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.

Hi Jan,

syzbot reported a null-ptr-deref in udf_read_folio a month ago [1].

This bug was marked as still open on syzbot, so I retested the reproducer (no patch applied) to check if the bug was still valid upstream, seems not (as reported up).
Wondering if syzbot will now try to find another reproducer, since after this check the reproducer was crossed away on the syzbot web UI, or if the bug can be considered closed.
I hope this might help.

[1] https://syzkaller.appspot.com/bug?extid=ddf8715339c89280b6fc

Thanks for your time,

--Gian