If you encounter any errors in bch_cached_dev_attach it will return a negative
error code. The variable 'v' which stores the result is unsigned, thus user
space sees a very large value returned for bytes written which can cause
incorrect user space behavior. Utilize 1 signed variable to use throughout
the function to preserve error return capability.
Signed-off-by: Tony Asleson <tasleson@xxxxxxxxxx>
---
drivers/md/bcache/sysfs.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
index f90f136..ab2f8ce 100644
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -192,7 +192,7 @@
{
struct cached_dev *dc = container_of(kobj, struct cached_dev,
disk.kobj);
- unsigned v = size;
+ ssize_t v = size;
struct cache_set *c;
struct kobj_uevent_env *env;
@@ -227,7 +227,7 @@
bch_cached_dev_run(dc);
if (attr == &sysfs_cache_mode) {
- ssize_t v = bch_read_string_list(buf, bch_cache_modes + 1);
+ v = bch_read_string_list(buf, bch_cache_modes + 1);
if (v < 0)
return v;
--
1.8.3.1
--
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