| commit | 68fda450a7df51cff9e5a4d4a4d9d0d5f2589153 | [log] [tgz] |
|---|---|---|
| author | Alexei Starovoitov <ast@kernel.org> | Fri Jan 12 18:59:52 2018 -0800 |
| committer | Daniel Borkmann <daniel@iogearbox.net> | Sun Jan 14 23:05:33 2018 +0100 |
| tree | 555aa6473c3d960c0a95bd9c4843c8b48947cf1f | |
| parent | c366287ebd698ef5e3de300d90cd62ee9ee7373e [diff] |
bpf: fix 32-bit divide by zero
due to some JITs doing if (src_reg == 0) check in 64-bit mode
for div/mod operations mask upper 32-bits of src register
before doing the check
Fixes: 622582786c9e ("net: filter: x86: internal BPF JIT")
Fixes: 7a12b5031c6b ("sparc64: Add eBPF JIT.")
Reported-by: syzbot+48340bb518e88849e2e3@syzkaller.appspotmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>