[alsa-devel] [PATCH 1/2] ucm: fix seg fault in execute_cset()

When there's no space in 'cset', 'pos' gets NULL, dereferencing 'pos' gets a seg fault. We need to be more robust.

Signed-off-by: Lu Guanqun guanqun.lu@intel.com --- src/ucm/main.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/src/ucm/main.c b/src/ucm/main.c index 8e9a85d..9ecbe43 100644 --- a/src/ucm/main.c +++ b/src/ucm/main.c @@ -196,7 +196,8 @@ static int execute_cset(snd_ctl_t *ctl, char *cset) goto __fail; err = 0; __fail: - *pos = ' '; + if (pos != NULL) + *pos = ' ';

if (id != NULL) free(id);