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um: vector: Avoid NULL ptr deference if transport is unset

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When the transport option of a vec isn't set strncmp ends up being
called on a NULL pointer. Better not do that.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Sjoerd Simons 2020-02-16 22:36:24 +01:00 committed by Richard Weinberger
parent 3363179385
commit 237ce2e681
1 changed files with 3 additions and 0 deletions
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3
arch/um/drivers/vector_kern.c
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@ -197,6 +197,9 @@ static int get_transport_options(struct arglist *def)
long parsed;
int result = 0;
if (transport == NULL)
return -EINVAL;
if (vector != NULL) {
if (kstrtoul(vector, 10, &parsed) == 0) {
if (parsed == 0) {