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| author | Chen Gang <gang.chen@asianux.com> | 2013-09-11 14:22:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-11 15:58:03 -0700 |
| commit | 1ecfd533f4c528b0b4cc5bc115c4c47f0b5e4828 (patch) | |
| tree | 5eb1a6053fe7999323ed7238e6cb4993652b05c5 /mm/mremap.c | |
| parent | 762216ab4e175f49d17bc7ad778c57b9028184e6 (diff) | |
| download | lwn-1ecfd533f4c528b0b4cc5bc115c4c47f0b5e4828.tar.gz lwn-1ecfd533f4c528b0b4cc5bc115c4c47f0b5e4828.zip | |
mm/mremap.c: call pud_free() after fail calling pmd_alloc()
In alloc_new_pmd(), if pud_alloc() was called successfully, but
pmd_alloc() fails, avoid leaking `pud'.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mremap.c')
| -rw-r--r-- | mm/mremap.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/mm/mremap.c b/mm/mremap.c index 0843feb66f3d..91b13d6a16d4 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -25,6 +25,7 @@ #include <asm/uaccess.h> #include <asm/cacheflush.h> #include <asm/tlbflush.h> +#include <asm/pgalloc.h> #include "internal.h" @@ -62,8 +63,10 @@ static pmd_t *alloc_new_pmd(struct mm_struct *mm, struct vm_area_struct *vma, return NULL; pmd = pmd_alloc(mm, pud, addr); - if (!pmd) + if (!pmd) { + pud_free(mm, pud); return NULL; + } VM_BUG_ON(pmd_trans_huge(*pmd)); |