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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-02-05 16:16:50 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-02-06 13:00:37 -0800 |
| commit | 6f5a55f1a6c5abee15a0e878e5c74d9f1569b8b0 (patch) | |
| tree | 2b5304a71a3b2ef2f0665e4e2d9262c6c6918848 /mm/migrate.c | |
| parent | 9d9c3a51e7b20dcd63b8cc534035af99a41d03e4 (diff) | |
| download | lwn-6f5a55f1a6c5abee15a0e878e5c74d9f1569b8b0.tar.gz lwn-6f5a55f1a6c5abee15a0e878e5c74d9f1569b8b0.zip | |
Fix potential crash with sys_move_pages
We incorrectly depended on the 'node_state/node_isset()' functions
testing the node range, rather than checking it explicitly. That's not
reliable, even if it might often happen to work. So do the proper
explicit test.
Reported-by: Marcus Meissner <meissner@suse.de>
Acked-and-tested-by: Brice Goglin <Brice.Goglin@inria.fr>
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/migrate.c')
| -rw-r--r-- | mm/migrate.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index efddbf0926b2..9a0db5bbabe4 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -912,6 +912,9 @@ static int do_pages_move(struct mm_struct *mm, struct task_struct *task, goto out_pm; err = -ENODEV; + if (node < 0 || node >= MAX_NUMNODES) + goto out_pm; + if (!node_state(node, N_HIGH_MEMORY)) goto out_pm; |