[alsa-devel] [PATCH] ucm: Fix segfault when device argument is missing from _sw{dev, mod}

Signed-off-by: Juho Hämäläinen juho.hamalainen@tieto.com --- src/ucm/main.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/src/ucm/main.c b/src/ucm/main.c index d38b7fa..74e1530 100644 --- a/src/ucm/main.c +++ b/src/ucm/main.c @@ -1649,6 +1649,10 @@ int snd_use_case_set(snd_use_case_mgr_t *uc_mgr, } else { str = NULL; } + if (!str) { + err = -EINVAL; + goto __end; + } if (check_identifier(identifier, "_swdev")) err = switch_device(uc_mgr, str, value); else if (check_identifier(identifier, "_swmod"))