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authorJulia Lawall <julia@diku.dk>2009-11-30 15:38:19 -0500
committerMatt Turner <mattst88@gmail.com>2009-11-30 15:38:19 -0500
commitcc9a2c8301683f73b7e0d1fc2cb5159110f3469f (patch)
treed513b100f178a0a4bf804e002d89af98f9f689c8
parent04d8a9db89f00dee78d792d094dc573784ead643 (diff)
arch/alpha/kernel: Add kmalloc NULL tests
Check that the result of kmalloc is not NULL before passing it to other functions. The semantic match that finds this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ expression *x; identifier f; constant char *C; @@ x = \(kmalloc\|kcalloc\|kzalloc\)(...); ... when != x == NULL when != x != NULL when != (x || ...) ( kfree(x) f(...,C,...,x,...) | *f(...,x,...) | *x->f ) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Matt Turner <mattst88@gmail.com>
-rw-r--r--arch/alpha/kernel/core_marvel.c2
-rw-r--r--arch/alpha/kernel/core_titan.c2
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/alpha/kernel/core_marvel.c b/arch/alpha/kernel/core_marvel.c
index 8e059e5..53dd2f1 100644
--- a/arch/alpha/kernel/core_marvel.c
+++ b/arch/alpha/kernel/core_marvel.c
@@ -1103,6 +1103,8 @@ marvel_agp_info(void)
* Allocate the info structure.
*/
agp = kmalloc(sizeof(*agp), GFP_KERNEL);
+ if (!agp)
+ return NULL;
/*
* Fill it in.
diff --git a/arch/alpha/kernel/core_titan.c b/arch/alpha/kernel/core_titan.c
index 7668649..219bf27 100644
--- a/arch/alpha/kernel/core_titan.c
+++ b/arch/alpha/kernel/core_titan.c
@@ -757,6 +757,8 @@ titan_agp_info(void)
* Allocate the info structure.
*/
agp = kmalloc(sizeof(*agp), GFP_KERNEL);
+ if (!agp)
+ return NULL;
/*
* Fill it in.