diff options
| author | Brad Love <brad@nextdimension.cc> | 2018-01-05 17:57:13 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-25 17:17:56 +0300 |
| commit | d62c8d80f84fa4c9dba0f61b27376339afde2f35 (patch) | |
| tree | 956a7f97d12ab74f5da0df13511686d7dc31661f /drivers/media | |
| parent | 53ba3526baad31528f72bd57bbc1b66378b60c3f (diff) | |
| download | linux-d62c8d80f84fa4c9dba0f61b27376339afde2f35.tar.xz | |
media: lgdt3306a: Fix a double kfree on i2c device remove
[ Upstream commit 94448e21cf08b10f7dc7acdaca387594370396b0 ]
Both lgdt33606a_release and lgdt3306a_remove kfree state, but _release is
called first, then _remove operates on states members before kfree'ing it.
This can lead to random oops/GPF/etc on USB disconnect.
Signed-off-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb-frontends/lgdt3306a.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/media/dvb-frontends/lgdt3306a.c b/drivers/media/dvb-frontends/lgdt3306a.c index b964ea6020c9..fbb3b2f49d2d 100644 --- a/drivers/media/dvb-frontends/lgdt3306a.c +++ b/drivers/media/dvb-frontends/lgdt3306a.c @@ -1767,7 +1767,13 @@ static void lgdt3306a_release(struct dvb_frontend *fe) struct lgdt3306a_state *state = fe->demodulator_priv; dbg_info("\n"); - kfree(state); + + /* + * If state->muxc is not NULL, then we are an i2c device + * and lgdt3306a_remove will clean up state + */ + if (!state->muxc) + kfree(state); } static const struct dvb_frontend_ops lgdt3306a_ops; |