[PATCH v3 12/13] smb: client: Use hmac_sha256_zeroize_ctx function to clear hmac_sha256_ctx
From: Thomas Huth <hidden>
Date: 2026-09-10 12:42:49
Also in:
linux-cifs, lkml
Subsystem:
common internet file system client (cifs and smb3), filesystems (vfs and infrastructure), the rest · Maintainers:
Paulo Alcantara, Namjae Jeon, Alexander Viro, Christian Brauner, Linus Torvalds
It's just cosmetics, but now that we have a helper function for clearing hmac_sha256_ctx with a __cleanup() statement, we can also use it in the smb client code for good measure. Signed-off-by: Thomas Huth <redacted> --- fs/smb/client/smb2transport.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/fs/smb/client/smb2transport.c b/fs/smb/client/smb2transport.c
index c407f30e00401..080864b24a0c5 100644
--- a/fs/smb/client/smb2transport.c
+++ b/fs/smb/client/smb2transport.c@@ -212,7 +212,7 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) unsigned char smb2_signature[SMB2_HMACSHA256_SIZE]; struct kvec *iov = rqst->rq_iov; struct smb2_hdr *shdr = (struct smb2_hdr *)iov[0].iov_base; - struct hmac_sha256_ctx hmac_ctx; + struct hmac_sha256_ctx hmac_ctx __cleanup(hmac_sha256_zeroize_ctx); struct smb_rqst drqst; __u64 sid = le64_to_cpu(shdr->SessionId); u8 key[SMB2_NTLMV2_SESSKEY_SIZE];
@@ -250,7 +250,6 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server) memcpy(shdr->Signature, smb2_signature, SMB2_SIGNATURE_SIZE); memzero_explicit(key, sizeof(key)); - memzero_explicit(&hmac_ctx, sizeof(hmac_ctx)); return rc; }
--
2.55.0