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ubifs: add check for crypto_shash_tfm_digest

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Add check for the return value of crypto_shash_tfm_digest() and return
the error if it fails in order to catch the error.

Fixes: 817aa09484 ("ubifs: support offline signed images")
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Chen Ni 2024-06-20 16:19:26 +08:00 committed by Richard Weinberger
parent 25e79a7f2c
commit 054fd15984
1 changed files with 4 additions and 1 deletions
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5
fs/ubifs/master.c
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@ -67,10 +67,13 @@ static int mst_node_check_hash(const struct ubifs_info *c,
{
u8 calc[UBIFS_MAX_HASH_LEN];
const void *node = mst;
int ret;
crypto_shash_tfm_digest(c->hash_tfm, node + sizeof(struct ubifs_ch),
ret = crypto_shash_tfm_digest(c->hash_tfm, node + sizeof(struct ubifs_ch),
UBIFS_MST_NODE_SZ - sizeof(struct ubifs_ch),
calc);
if (ret)
return ret;
if (ubifs_check_hash(c, expected, calc))
return -EPERM;