On Fri, Sep 23, 2022 at 09:05:40AM -0700, syzbot wrote: > syzbot found the following issue on: > > HEAD commit: 483fed3b5dc8 Add linux-next specific files for 20220921 > git tree: linux-next > console+strace: https://syzkaller.appspot.com/x/log.txt?x=13b13f30880000 > kernel config: https://syzkaller.appspot.com/x/.config?x=849cb9f70f15b1ba > dashboard link: https://syzkaller.appspot.com/bug?extid=9d14351a171d0d1c7955 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14283ac4880000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=156da4ef080000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/1cb3f4618323/disk-483fed3b.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/cc02cb30b495/vmlinux-483fed3b.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+9d14351a171d0d1c7955@xxxxxxxxxxxxxxxxxxxxxxxxx > > ------------[ cut here ]------------ > memcpy: detected field-spanning write (size 93) of single field "&fh->fb" at fs/overlayfs/export.c:799 (size 21) I've send a patch for this now: https://lore.kernel.org/linux-hardening/20220924073315.3593031-1-keescook@xxxxxxxxxxxx -- Kees Cook
