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| author | Julia Lawall <julia@diku.dk> | 2010-09-04 00:12:44 (GMT) |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-10-13 05:19:04 (GMT) |
| commit | a655237fa2f9e4afe9949abe2c511432ab9537dd (patch) | |
| tree | ae4ecac9434e48d4da63aa8d96fcaa7e3296e6f7 /arch/powerpc/kernel | |
| parent | 689fd14ae9b2af5c6862ddc11d4791ec9a938cb3 (diff) | |
| download | linux-fsl-qoriq-a655237fa2f9e4afe9949abe2c511432ab9537dd.tar.xz | |
powerpc/irq.c: Add of_node_put to avoid memory leak
In this case, a device_node structure is stored in another structure that
is then freed without first decrementing the reference count of the
device_node structure.
The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
expression x;
identifier f;
position p1,p2;
@@
x@p1->f = \(of_find_node_by_path\|of_find_node_by_name\|of_find_node_by_phandle\|of_get_parent\|of_get_next_parent\|of_get_next_child\|of_find_compatible_node\|of_match_node\|of_find_node_by_type\|of_find_node_with_property\|of_find_matching_node\|of_parse_phandle\|of_node_get\)(...);
... when != of_node_put(x)
kfree@p2(x)
@script:python@
p1 << r.p1;
p2 << r.p2;
@@
cocci.print_main("call",p1)
cocci.print_secs("free",p2)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/irq.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 47fbc56..4002b48 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -587,8 +587,10 @@ struct irq_host *irq_alloc_host(struct device_node *of_node, * this will be fixed once slab is made available early * instead of the current cruft */ - if (mem_init_done) + if (mem_init_done) { + of_node_put(host->of_node); kfree(host); + } return NULL; } irq_map[0].host = host; |