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| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-02-01 10:35:22 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-02-08 10:45:24 -0200 |
| commit | adefdceef4c1cefee2678724cd57824c8ca80091 (patch) | |
| tree | 6c3f48315f310980287a5acb8c1fd9d796547d10 | |
| parent | 6339204ecc2aa2067a99595522de0403f0854bb8 (diff) | |
| download | blackbird-op-linux-adefdceef4c1cefee2678724cd57824c8ca80091.tar.gz blackbird-op-linux-adefdceef4c1cefee2678724cd57824c8ca80091.zip | |
V4L/DVB: Fix the risk of an oops at dvb_dmx_release
dvb_dmx_init tries to allocate virtual memory for 2 pointers: filter and feed.
If the second vmalloc fails, filter is freed, but the pointer keeps pointing
to the old place. Later, when dvb_dmx_release() is called, it will try to
free an already freed memory, causing an OOPS.
Reviewed-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/dvb/dvb-core/dvb_demux.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-core/dvb_demux.c b/drivers/media/dvb/dvb-core/dvb_demux.c index b78cfb7d1897..a78408e76e75 100644 --- a/drivers/media/dvb/dvb-core/dvb_demux.c +++ b/drivers/media/dvb/dvb-core/dvb_demux.c @@ -1246,6 +1246,7 @@ int dvb_dmx_init(struct dvb_demux *dvbdemux) dvbdemux->feed = vmalloc(dvbdemux->feednum * sizeof(struct dvb_demux_feed)); if (!dvbdemux->feed) { vfree(dvbdemux->filter); + dvbdemux->filter = NULL; return -ENOMEM; } for (i = 0; i < dvbdemux->filternum; i++) { |
