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Linux: Silence static analyzer warning in crypto_create_ctx_template()

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A CodeChecker report from Clang's CTU analysis indicated that we were
assigning uninitialized values in crypto_create_ctx_template() when we
call it from zio_crypt_key_init(). This occurs because the ->cm_param
and ->cm_param_len fields are uninitialized. Thankfully, the
uninitialized values are only used in the skein via
KCF_PROV_CREATE_CTX_TEMPLATE() -> skein_create_ctx_template() ->
skein_mac_ctx_build() -> skein_get_digest_bitlen(), but that should not
be called from here. We fix this to avoid a possible trap should this
code change in the future.

The FreeBSD version of zio_crypt_key_init() is unaffected.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #14575
This commit is contained in:
Richard Yao 2023-03-04 23:48:06 -05:00 committed by Brian Behlendorf
parent 51f55742f6
commit c2550a136e
1 changed files with 1 additions and 1 deletions
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2
module/os/linux/zfs/zio_crypt.c
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@ -223,7 +223,7 @@ int
zio_crypt_key_init(uint64_t crypt, zio_crypt_key_t *key)
{
int ret;
crypto_mechanism_t mech;
crypto_mechanism_t mech = {0};
uint_t keydata_len;
ASSERT(key != NULL);