diff options
| author | Paul Walmsley <paul@pwsan.com> | 2009-04-25 05:28:36 -0600 |
|---|---|---|
| committer | Liam Girdwood <lrg@slimlogic.co.uk> | 2009-04-28 18:58:07 +0100 |
| commit | 53032dafc6b93ac178ca2340ff8eb4ee2b3d1a92 (patch) | |
| tree | a0bc0e11440df935a1a3b74f04cb91485fa2cd0a | |
| parent | cd78dfc6c6e321a310a73ef7b0df3d262704dd55 (diff) | |
regulator core: fix double-free in regulator_register() error path
During regulator registration, any error after device_register() will
cause a double-free on the struct regulator_dev 'rdev'. The bug is in
drivers/regulator/core.c:regulator_register():
...
scrub:
device_unregister(&rdev->dev);
clean:
kfree(rdev); <---
rdev = ERR_PTR(ret);
goto out;
...
device_unregister() calls regulator_dev_release() which frees rdev. The
subsequent kfree corrupts memory and causes some OMAP3 systems to oops on
boot in regulator_get().
Applies against 2.6.30-rc3.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
| -rw-r--r-- | drivers/regulator/core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index cb62be63cae..2f14c16f58c 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2080,6 +2080,10 @@ out: scrub: device_unregister(&rdev->dev); + /* device core frees rdev */ + rdev = ERR_PTR(ret); + goto out; + clean: kfree(rdev); rdev = ERR_PTR(ret); |