Re: [syzbot] [ecryptfs?] KASAN: slab-out-of-bounds Read in ecryptfs_write_tag_70_packet

[Tyler Hicks]

On 2026-09-21 08:53:32, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    518e5b794c06 Merge tag 'for-7.3-rc3-tag' of git://git.kern..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=17e5fff9580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=c3bddd52b22c2498
> dashboard link: https://syzkaller.appspot.com/bug?extid=e4391e0d6e7c89b8c84e
> compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1015fff9580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10b73915580000
> 
> Downloadable assets:
> disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-518e5b79.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/5307a29f916b/vmlinux-518e5b79.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/7d4c698a99b1/bzImage-518e5b79.xz
> mounted in repro: https://storage.googleapis.com/syzbot-assets/4a20c8843682/mount_0.gz
>   fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=13e5fff9580000)
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+e4391e0d6e7c89b8c84e@xxxxxxxxxxxxxxxxxxxxxxxxx

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs.git next