diff options
| author | Julia Lawall <julia@diku.dk> | 2010-07-30 19:17:28 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-31 02:19:30 +0400 |
| commit | f2d2420bbf4bb125ea5f2e1573d4da6b668fc78a (patch) | |
| tree | b6a074ce9a14e7fc1f99641bb3e47b83417f34eb /arch/arm/common/sa1111.c | |
| parent | 74bc80931c8bc34d24545f992a35349ad548897c (diff) | |
| download | linux-f2d2420bbf4bb125ea5f2e1573d4da6b668fc78a.tar.xz | |
SA1111: Eliminate use after free
__sa1111_remove always frees its argument, so the subsequent reference to
sachip->saved_state represents a use after free. __sa1111_remove does not
appear to use the saved_state field, so the patch simply frees it first.
A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
expression E,E2;
@@
__sa1111_remove(E)
...
(
E = E2
|
* E
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/common/sa1111.c')
| -rw-r--r-- | arch/arm/common/sa1111.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/arm/common/sa1111.c b/arch/arm/common/sa1111.c index 6f80665f477e..9eaf65f43642 100644 --- a/arch/arm/common/sa1111.c +++ b/arch/arm/common/sa1111.c @@ -1028,13 +1028,12 @@ static int sa1111_remove(struct platform_device *pdev) struct sa1111 *sachip = platform_get_drvdata(pdev); if (sachip) { - __sa1111_remove(sachip); - platform_set_drvdata(pdev, NULL); - #ifdef CONFIG_PM kfree(sachip->saved_state); sachip->saved_state = NULL; #endif + __sa1111_remove(sachip); + platform_set_drvdata(pdev, NULL); } return 0; |