diff options
| author | Shyam Prasad N <sprasad@microsoft.com> | 2021-10-14 14:52:39 +0300 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2021-11-02 21:12:55 +0300 |
| commit | 7be3248f313930ff3d3436d4e9ddbe9fccc1f541 (patch) | |
| tree | 59509a1b82e5b7f0d2568b6f524399d06d0cbb8f /fs/cifs/fs_context.c | |
| parent | 3906fe9bb7f1a2c8667ae54e967dc8690824f4ea (diff) | |
| download | linux-7be3248f313930ff3d3436d4e9ddbe9fccc1f541.tar.xz | |
cifs: To match file servers, make sure the server hostname matches
We generally rely on a bunch of factors to differentiate between servers.
For example, IP address, port etc.
For certain server types (like Azure), it is important to make sure
that the server hostname matches too, even if the both hostnames currently
resolve to the same IP address.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/fs_context.c')
| -rw-r--r-- | fs/cifs/fs_context.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/cifs/fs_context.c b/fs/cifs/fs_context.c index 3109def8e199..4130908af8d7 100644 --- a/fs/cifs/fs_context.c +++ b/fs/cifs/fs_context.c @@ -318,6 +318,7 @@ smb3_fs_context_dup(struct smb3_fs_context *new_ctx, struct smb3_fs_context *ctx DUP_CTX_STR(mount_options); DUP_CTX_STR(username); DUP_CTX_STR(password); + DUP_CTX_STR(server_hostname); DUP_CTX_STR(UNC); DUP_CTX_STR(source); DUP_CTX_STR(domainname); @@ -456,6 +457,11 @@ smb3_parse_devname(const char *devname, struct smb3_fs_context *ctx) if (!pos) return -EINVAL; + /* record the server hostname */ + ctx->server_hostname = kstrndup(devname + 2, pos - devname - 2, GFP_KERNEL); + if (!ctx->server_hostname) + return -ENOMEM; + /* skip past delimiter */ ++pos; @@ -1496,6 +1502,8 @@ smb3_cleanup_fs_context_contents(struct smb3_fs_context *ctx) ctx->username = NULL; kfree_sensitive(ctx->password); ctx->password = NULL; + kfree(ctx->server_hostname); + ctx->server_hostname = NULL; kfree(ctx->UNC); ctx->UNC = NULL; kfree(ctx->source); |