diff options
| author | Long Li <longli@microsoft.com> | 2020-03-26 22:09:20 -0700 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2020-03-29 16:42:54 -0500 |
| commit | 3946d0d04bb360acca72db5efe9ae8440012d9dc (patch) | |
| tree | 39867fa0e69552e40dacf8910d99f407a78dda71 /fs | |
| parent | 4ebb8795a746b2a3dbab4f12e4a1227603441a81 (diff) | |
| download | linux-stable-3946d0d04bb360acca72db5efe9ae8440012d9dc.tar.gz linux-stable-3946d0d04bb360acca72db5efe9ae8440012d9dc.tar.bz2 linux-stable-3946d0d04bb360acca72db5efe9ae8440012d9dc.zip | |
cifs: Allocate encryption header through kmalloc
When encryption is used, smb2_transform_hdr is defined on the stack and is
passed to the transport. This doesn't work with RDMA as the buffer needs to
be DMA'ed.
Fix it by using kmalloc.
Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/cifs/transport.c | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index cb3ee916f527..c97570eb2c18 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -466,7 +466,7 @@ smb_send_rqst(struct TCP_Server_Info *server, int num_rqst, struct smb_rqst *rqst, int flags) { struct kvec iov; - struct smb2_transform_hdr tr_hdr; + struct smb2_transform_hdr *tr_hdr; struct smb_rqst cur_rqst[MAX_COMPOUND]; int rc; @@ -476,28 +476,34 @@ smb_send_rqst(struct TCP_Server_Info *server, int num_rqst, if (num_rqst > MAX_COMPOUND - 1) return -ENOMEM; - memset(&cur_rqst[0], 0, sizeof(cur_rqst)); - memset(&iov, 0, sizeof(iov)); - memset(&tr_hdr, 0, sizeof(tr_hdr)); - - iov.iov_base = &tr_hdr; - iov.iov_len = sizeof(tr_hdr); - cur_rqst[0].rq_iov = &iov; - cur_rqst[0].rq_nvec = 1; - if (!server->ops->init_transform_rq) { cifs_server_dbg(VFS, "Encryption requested but transform " "callback is missing\n"); return -EIO; } + tr_hdr = kmalloc(sizeof(*tr_hdr), GFP_NOFS); + if (!tr_hdr) + return -ENOMEM; + + memset(&cur_rqst[0], 0, sizeof(cur_rqst)); + memset(&iov, 0, sizeof(iov)); + memset(tr_hdr, 0, sizeof(*tr_hdr)); + + iov.iov_base = tr_hdr; + iov.iov_len = sizeof(*tr_hdr); + cur_rqst[0].rq_iov = &iov; + cur_rqst[0].rq_nvec = 1; + rc = server->ops->init_transform_rq(server, num_rqst + 1, &cur_rqst[0], rqst); if (rc) - return rc; + goto out; rc = __smb_send_rqst(server, num_rqst + 1, &cur_rqst[0]); smb3_free_compound_rqst(num_rqst, &cur_rqst[1]); +out: + kfree(tr_hdr); return rc; } |