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| author | Dan Carpenter <error27@gmail.com> | 2010-05-25 23:42:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-26 08:19:23 -0700 |
| commit | 0cae3457b1a6e88f31020272bcfd90c178716053 (patch) | |
| tree | 71cf3f4049e9e80a5dd71219bd74061e8587a643 | |
| parent | b1cdc4670b9508fcd47a15fbd12f70d269880b37 (diff) | |
| download | lwn-0cae3457b1a6e88f31020272bcfd90c178716053.tar.gz lwn-0cae3457b1a6e88f31020272bcfd90c178716053.zip | |
mempolicy: ERR_PTR dereference in mpol_shared_policy_init()
The original code called mpol_put(new) while "new" was an ERR_PTR.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/mempolicy.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 75751012c552..5d6fb339de03 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -2098,7 +2098,7 @@ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol) /* contextualize the tmpfs mount point mempolicy */ new = mpol_new(mpol->mode, mpol->flags, &mpol->w.user_nodemask); if (IS_ERR(new)) - goto put_free; /* no valid nodemask intersection */ + goto free_scratch; /* no valid nodemask intersection */ task_lock(current); ret = mpol_set_nodemask(new, &mpol->w.user_nodemask, scratch); @@ -2114,6 +2114,7 @@ void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol) put_free: mpol_put(new); /* drop initial ref */ +free_scratch: NODEMASK_SCRATCH_FREE(scratch); } } |