4.18-stable review patch. If anyone has any objections, please let me know.
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From: Aurelien Aptel aaptel@suse.com
commit a5c62f4833c2c8e6e0f35367b99b717b78f5c029 upstream.
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@suse.com Reviewed-by: Paulo Alcantara palcantara@suse.com Reported-by: Xiaoli Feng xifeng@redhat.com Signed-off-by: Steve French stfrench@microsoft.com CC: Stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/cifs/smb2transport.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/fs/cifs/smb2transport.c +++ b/fs/cifs/smb2transport.c @@ -173,7 +173,7 @@ smb2_calc_signature(struct smb_rqst *rqs 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 *rqs
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 *rqs return rc; }
+ shash = &server->secmech.sdeschmacsha256->shash; rc = crypto_shash_init(shash); if (rc) { cifs_dbg(VFS, "%s: Could not init sha256", __func__);