On August 2, 2018 11:39:52 AM GMT-03:00, Aurelien Aptel <aaptel@xxxxxxxx> wrote:
server->secmech.sdeschmacsha256 is not properly initialized before
smb2_shash_allocate(), set shash after that call.
also fix typo in error message
Fixes: 8de8c4608fe9 ("cifs: Fix validation of signed data in smb2")
Signed-off-by: Aurelien Aptel <aaptel@xxxxxxxx>
---
fs/cifs/smb2transport.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index 719d55e63d88..bf61c3774830 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -173,7 +173,7 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
struct kvec *iov = rqst->rq_iov;
struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)iov[0].iov_base;
struct cifs_ses *ses;
- struct shash_desc *shash = &server->secmech.sdeschmacsha256->shash;
+ struct shash_desc *shash;
struct smb_rqst drqst;
ses = smb2_find_smb_ses(server, shdr->SessionId);
@@ -187,7 +187,7 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
rc = smb2_crypto_shash_allocate(server);
if (rc) {
- cifs_dbg(VFS, "%s: shah256 alloc failed\n", __func__);
+ cifs_dbg(VFS, "%s: sha256 alloc failed\n", __func__);
return rc;
}
@@ -198,6 +198,7 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
return rc;
}
+ shash = &server->secmech.sdeschmacsha256->shash;
rc = crypto_shash_init(shash);
if (rc) {
cifs_dbg(VFS, "%s: Could not init sha256", __func__);
--
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