The recvmsg() call can return zero for a zero-length UDP message, which
should be handled as a bad message and not a fault of the port. This was
addressed in commit 6b61ba29c78e ("Avoid fault when receiving zero
length packets"), but later regressed in commit a6e0b83bd503
("sk: Convey transmit path errors to the caller.").
Signed-off-by: Miroslav Lichvar <mlich...@redhat.com>
Fixes: a6e0b83bd503 ("sk: Convey transmit path errors to the caller.")
---
sk.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sk.c b/sk.c
index c9ef4d2..8be0708 100644
--- a/sk.c
+++ b/sk.c
@@ -391,7 +391,7 @@ int sk_receive(int fd, void *buf, int buflen,
if (!ts) {
memset(&hwts->ts, 0, sizeof(hwts->ts));
- return cnt < 1 ? -errno : cnt;
+ return cnt < 0 ? -errno : cnt;
}
switch (hwts->type) {
@@ -407,7 +407,7 @@ int sk_receive(int fd, void *buf, int buflen,
hwts->ts = timespec_to_tmv(ts[1]);
break;
}
- return cnt < 1 ? -errno : cnt;
+ return cnt < 0 ? -errno : cnt;
}
int sk_set_priority(int fd, int family, uint8_t dscp)
--
2.26.2
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