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crypto: algif_aead - Fix minimum RX size check for decryption

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The check for the minimum receive buffer size did not take the
tag size into account during decryption.  Fix this by adding the
required extra length.

Reported-by: syzbot+aa11561819dc42ebbc7c@syzkaller.appspotmail.com
Reported-by: Daniel Pouzzner <douzzer@mega.nu>
Fixes: d887c52d6a ("crypto: algif_aead - overhaul memory management")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
2026-04-12 13:32:21 +08:00
parent d702c34082
commit 3d14bd48e3
1 changed files with 1 additions and 1 deletions
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2
crypto/algif_aead.c
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@@ -144,7 +144,7 @@ static int _aead_recvmsg(struct socket *sock, struct msghdr *msg,
if (usedpages < outlen) { if (usedpages < outlen) {
size_t less = outlen - usedpages; size_t less = outlen - usedpages;
if (used < less) { if (used < less + (ctx->enc ? 0 : as)) {
err = -EINVAL; err = -EINVAL;
goto free; goto free;
} }