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| author | Sjoerd Simons <sjoerd.simons@collabora.co.uk> | 2020-02-16 22:36:24 +0100 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2020-03-29 23:54:51 +0200 |
| commit | 237ce2e681d20e92fe17fc23a348b4f0d595e641 (patch) | |
| tree | 6696bd9c027e803eea0196cfb96d51c7d965e85f /arch/um | |
| parent | 3363179385629c1804ea846f4e72608c2201a81e (diff) | |
| download | lwn-237ce2e681d20e92fe17fc23a348b4f0d595e641.tar.gz lwn-237ce2e681d20e92fe17fc23a348b4f0d595e641.zip | |
um: vector: Avoid NULL ptr deference if transport is unset
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>
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/drivers/vector_kern.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/um/drivers/vector_kern.c b/arch/um/drivers/vector_kern.c index 9693dfca7651..8e8aac1d30e1 100644 --- a/arch/um/drivers/vector_kern.c +++ b/arch/um/drivers/vector_kern.c @@ -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) { |