aboutsummaryrefslogtreecommitdiff
path: root/fs
diff options
context:
space:
mode:
authorLiu ShuoX <shuox.liu@intel.com>2014-03-17 11:24:49 +1100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-02-05 22:35:40 -0800
commitca889efda7bb061eb29716ba34a3271c298eb948 (patch)
tree87029e673cfaefb36db09c1c90841fe8218dd419 /fs
parent93ad866ac560221de44101e36837e40942c75226 (diff)
downloadlinux-linaro-stable-ca889efda7bb061eb29716ba34a3271c298eb948.tar.gz
pstore: skip zero size persistent ram buffer in traverse
commit aa9a4a1edfbd3d223af01db833da2f07850bc655 upstream. In ramoops_pstore_read, a valid prz pointer with zero size buffer will break traverse of all persistent ram buffers. The latter buffer might be lost. Signed-off-by: Liu ShuoX <shuox.liu@intel.com> Cc: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com> Cc: Colin Cross <ccross@android.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com> Cc: HuKeping <hukeping@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/pstore/ram.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 546fdc7d3399..e0e42b5a691c 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -126,12 +126,12 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max,
prz = przs[i];
- if (update) {
- /* Update old/shadowed buffer. */
+ /* Update old/shadowed buffer. */
+ if (update)
persistent_ram_save_old(prz);
- if (!persistent_ram_old_size(prz))
- return NULL;
- }
+
+ if (!persistent_ram_old_size(prz))
+ return NULL;
*typep = type;
*id = i;