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Message-ID: <CAN+4W8jFTcnS-EBppkoRXmfzUOgiGNwBku69==-b-Z_2fDHfUw@mail.gmail.com> Date: Thu, 11 May 2023 08:19:17 -0700 From: Lorenz Bauer <lmb@...valent.com> To: syzbot <syzbot+d742fd7d34097f949179@...kaller.appspotmail.com> Cc: andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org, daniel@...earbox.net, davem@...emloft.net, haoluo@...gle.com, hawk@...nel.org, john.fastabend@...il.com, jolsa@...nel.org, kpsingh@...nel.org, kuba@...nel.org, linux-kernel@...r.kernel.org, llvm@...ts.linux.dev, martin.lau@...ux.dev, nathan@...nel.org, ndesaulniers@...gle.com, netdev@...r.kernel.org, sdf@...gle.com, song@...nel.org, syzkaller-bugs@...glegroups.com, trix@...hat.com, yhs@...com Subject: Re: [syzbot] [bpf?] KASAN: slab-out-of-bounds Write in copy_array (2) On Wed, May 10, 2023 at 5:14 PM syzbot <syzbot+d742fd7d34097f949179@...kaller.appspotmail.com> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: 950b879b7f02 riscv: Fixup race condition on PG_dcache_clea.. > git tree: git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes > console output: https://syzkaller.appspot.com/x/log.txt?x=17eaa0c6280000 > kernel config: https://syzkaller.appspot.com/x/.config?x=ecebece1b90c0342 > dashboard link: https://syzkaller.appspot.com/bug?extid=d742fd7d34097f949179 > compiler: riscv64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > userspace arch: riscv64 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/5ab53d394dbf/non_bootable_disk-950b879b.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/938475579d6c/vmlinux-950b879b.xz > kernel image: https://storage.googleapis.com/syzbot-assets/bcf263d8c574/Image-950b879b.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+d742fd7d34097f949179@...kaller.appspotmail.com That tree doesn't have the fix yet: https://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git/tree/kernel/bpf/verifier.c?h=fixes&id=950b879b7f02#n1065 #syz fix: bpf: Always use maximal size for copy_array()
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