From: Horia Geanta <horia.geanta@xxxxxxxxxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit 27c5fb7a84242b66bf1e0b2fe6bf40d19bcc5c04 upstream.
GFP_ATOMIC memory allocation could fail.
In this case, avoid NULL pointer dereference and notify user.
Cc: Kim Phillips <kim.phillips@xxxxxxxxxxxxx>
Signed-off-by: Horia Geanta <horia.geanta@xxxxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/crypto/caam/error.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/crypto/caam/error.c b/drivers/crypto/caam/error.c
index 9f25f5296029..0eabd81e1a90 100644
--- a/drivers/crypto/caam/error.c
+++ b/drivers/crypto/caam/error.c
@@ -16,9 +16,13 @@
char *tmp; \
\
tmp = kmalloc(sizeof(format) + max_alloc, GFP_ATOMIC); \
- sprintf(tmp, format, param); \
- strcat(str, tmp); \
- kfree(tmp); \
+ if (likely(tmp)) { \
+ sprintf(tmp, format, param); \
+ strcat(str, tmp); \
+ kfree(tmp); \
+ } else { \
+ strcat(str, "kmalloc failure in SPRINTFCAT"); \
+ } \
}
static void report_jump_idx(u32 status, char *outstr)
--
1.9.3
--
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