diff options
| author | Sasha Levin <sasha.levin@oracle.com> | 2013-02-27 17:03:28 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-27 19:10:12 -0800 |
| commit | fe88f2ee33731f0934e8fb26f762b6715e43ff6f (patch) | |
| tree | b6e8af3812192ca5d8a60c51faaa9a025dbe7a5e /kernel/kexec.c | |
| parent | 0d0bf6674136eb861b37213160b16388cfc1926d (diff) | |
| download | lwn-fe88f2ee33731f0934e8fb26f762b6715e43ff6f.tar.gz lwn-fe88f2ee33731f0934e8fb26f762b6715e43ff6f.zip | |
kexec: prevent double free on image allocation failure
If kimage_normal_alloc() fails to initialize an allocated kimage, it will
free the image but would still set 'rimage', as a result kexec_load will
try to free it again.
This would explode as part of the freeing process is accessing internal
members which point to uninitialized memory.
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/kexec.c')
| -rw-r--r-- | kernel/kexec.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/kernel/kexec.c b/kernel/kexec.c index 2348bd6ef2af..855bfbbf4048 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -242,8 +242,6 @@ static int kimage_normal_alloc(struct kimage **rimage, unsigned long entry, if (result) goto out; - *rimage = image; - /* * Find a location for the control code buffer, and add it * the vector of segments so that it's pages will also be |