This is not a leak! The stack memroy is hashed and fed into the entropy pool. We can't recover the original kernel memory from it. Reported-by: syzbot+e8bcd7ee3db6cb5cb875@xxxxxxxxxxxxxxxxxxxxxxxxx Closes: https://syzkaller.appspot.com/bug?extid=e8bcd7ee3db6cb5cb875 Signed-off-by: Edward Adam Davis <eadavis@xxxxxx> --- V1 -> V2: mark it as unpoison crypto/jitterentropy-kcapi.c | 1 + 1 file changed, 1 insertion(+) diff --git a/crypto/jitterentropy-kcapi.c b/crypto/jitterentropy-kcapi.c index 1266eb790708..4020a6e41b0e 100644 --- a/crypto/jitterentropy-kcapi.c +++ b/crypto/jitterentropy-kcapi.c @@ -117,6 +117,7 @@ int jent_hash_time(void *hash_state, __u64 time, u8 *addtl, pr_warn_ratelimited("Unexpected digest size\n"); return -EINVAL; } + kmsan_unpoison_memory(intermediary, SHA3_256_DIGEST_SIZE); /* * This loop fills a buffer which is injected into the entropy pool. -- 2.43.0
