Commit 5ba2f67a authored by Arjan van de Ven's avatar Arjan van de Ven Committed by Linus Torvalds
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security: avoid calling a NULL function pointer in drivers/video/tvaudio.c

NULL function pointers are very bad security wise. This one got caught by quite a few times, so it's happening in the field....

Fix is simple, check the function pointer for NULL, like 6 other places
in the same function are already doing.
Signed-off-by: default avatarArjan van de Ven <>
Signed-off-by: default avatarLinus Torvalds <>
parent 64f1b653
......@@ -1792,7 +1792,7 @@ static int chip_command(struct i2c_client *client,
chip->mode = 0; /* automatic */
if (desc->checkmode) {
if (desc->checkmode && desc->setmode) {
if (chip->prevmode != V4L2_TUNER_MODE_MONO)
chip->prevmode = -1; /* reset previous mode */
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