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V4L/DVB: Fix the risk of an oops at dvb_dmx_release

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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>
This commit is contained in:
Mauro Carvalho Chehab 2010-02-01 10:35:22 -03:00
parent 6339204ecc
commit adefdceef4
1 changed files with 1 additions and 0 deletions
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1
drivers/media/dvb/dvb-core/dvb_demux.c
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@ -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++) {