Jakub Sitnicki says:
====================
This patch set addresses the syzbot report in [1].
Patch #1 has been suggested by Eric [2]. I extended it to cover the rest of
sock_map proto callbacks. Otherwise we would still overflow the stack.
Patch #2 contains the actual fix and bug analysis.
Patches #3 & #4 add coverage to selftests to trigger the bug.
[1] https://lore.kernel.org/all/
00000000000073b14905ef2e7401@google.com/
[2] https://lore.kernel.org/all/CANn89iK2UN1FmdUcH12fv_xiZkv2G+Nskvmq7fG6aA_6VKRf6g@mail.gmail.com/
---
v1 -> v2:
v1: https://lore.kernel.org/r/
20230113-sockmap-fix-v1-0-
d3cad092ee10@cloudflare.com
[v1 didn't hit bpf@ ML by mistake]
* pull in Eric's patch to protect against recursion loop bugs (Eric)
* add a macro helper to check if pointer is inside a memory range (Eric)
====================
Signed-off-by: Alexei Starovoitov <ast@kernel.org>