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crypto: jitter - Mark intermediary memory as clean

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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@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=e8bcd7ee3db6cb5cb875
Signed-off-by: Edward Adam Davis <eadavis@qq.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Edward Adam Davis
2025-08-18 21:24:17 +08:00
committed by Herbert Xu
parent 501302d5ce
commit 9aa7e045f4
1 changed files with 1 additions and 0 deletions
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crypto/jitterentropy-kcapi.c
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@@ -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, sizeof(intermediary));
/*
* This loop fills a buffer which is injected into the entropy pool.