diff options
| author | Ira Weiny <ira.weiny@intel.com> | 2022-12-29 14:04:46 -0800 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2023-01-04 00:08:53 -0600 |
| commit | 67fcb2c598bc7643f694e8194d5c300a52af5aa9 (patch) | |
| tree | f90664b3b60ca5d1612a3634be8d0e3d44eb6eed /fs | |
| parent | 88603b6dc419445847923fcb7fe5080067a30f98 (diff) | |
| download | linux-67fcb2c598bc7643f694e8194d5c300a52af5aa9.tar.bz2 | |
cifs: Fix kmap_local_page() unmapping
kmap_local_page() requires kunmap_local() to unmap the mapping. In
addition memcpy_page() is provided to perform this common memcpy
pattern.
Replace the kmap_local_page() and broken kunmap() with memcpy_page()
Fixes: d406d26745ab ("cifs: skip alloc when request has no pages")
Reviewed-by: Paulo Alcantara <pc@cjr.nz>
Reviewed-by: "Fabio M. De Francesco" <fmdefrancesco@gmail.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/cifs/smb2ops.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index dc160de7a6de..0d7e9bcd9f34 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -4488,17 +4488,12 @@ smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, /* copy pages form the old */ for (j = 0; j < npages; j++) { - char *dst, *src; unsigned int offset, len; rqst_page_get_length(new, j, &len, &offset); - dst = kmap_local_page(new->rq_pages[j]) + offset; - src = kmap_local_page(old->rq_pages[j]) + offset; - - memcpy(dst, src, len); - kunmap(new->rq_pages[j]); - kunmap(old->rq_pages[j]); + memcpy_page(new->rq_pages[j], offset, + old->rq_pages[j], offset, len); } } |