diff options
| author | Julia Lawall <julia@diku.dk> | 2010-03-28 23:39:22 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-04-07 18:00:40 +1000 |
| commit | ab30f78c0afbb86584144925e25c7ca68ba9a91f (patch) | |
| tree | 2ddd3972415c317c89b7c983463952721e04f5e4 /drivers/macintosh/windfarm_pm91.c | |
| parent | 637a99022fb119b90fb281715d13172f0394fc12 (diff) | |
| download | lwn-ab30f78c0afbb86584144925e25c7ca68ba9a91f.tar.gz lwn-ab30f78c0afbb86584144925e25c7ca68ba9a91f.zip | |
powerpc/pmac/windfarm: Correct potential double free
The conditionals were testing different values, but then all freeing the
same one, which could result in a double free.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
expression x,e;
identifier f;
iterator I;
statement S;
@@
*kfree(x);
... when != &x
when != x = e
when != I(x,...) S
*x
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/macintosh/windfarm_pm91.c')
| -rw-r--r-- | drivers/macintosh/windfarm_pm91.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/macintosh/windfarm_pm91.c b/drivers/macintosh/windfarm_pm91.c index bea99168ff35..344273235124 100644 --- a/drivers/macintosh/windfarm_pm91.c +++ b/drivers/macintosh/windfarm_pm91.c @@ -687,12 +687,9 @@ static int __devexit wf_smu_remove(struct platform_device *ddev) wf_put_control(cpufreq_clamp); /* Destroy control loops state structures */ - if (wf_smu_slots_fans) - kfree(wf_smu_cpu_fans); - if (wf_smu_drive_fans) - kfree(wf_smu_cpu_fans); - if (wf_smu_cpu_fans) - kfree(wf_smu_cpu_fans); + kfree(wf_smu_slots_fans); + kfree(wf_smu_drive_fans); + kfree(wf_smu_cpu_fans); return 0; } |