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mempolicy: ERR_PTR dereference in mpol_shared_policy_init()

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The original code called mpol_put(new) while "new" was an ERR_PTR.

Signed-off-by: Dan Carpenter <[email protected]>
Cc: Lee Schermerhorn <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Cc: Christoph Lameter <[email protected]>
Acked-by: David Rientjes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Dan Carpenter 2010-05-25 23:42:58 -07:00 • committed by Linus Torvalds
commit 0cae3457b1
1 changed files with 2 additions and 1 deletions
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3
mm/mempolicy.c
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@ -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);
}
}