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From cd238111a7980917e04cfdc5dae144d1fb4c0a49 Mon Sep 17 00:00:00 2001
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From: Jorge Niedbalski <jorge.niedbalski@canonical.com>
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Date: Wed, 28 Sep 2016 18:25:50 -0300
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Subject: [PATCH] If the notification message length is 0, ignore the message
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(#4237)
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Fixes #4234.
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Signed-off-by: Jorge Niedbalski <jnr@metaklass.org>
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Cherry-picked from: 531ac2b2349da02acc9c382849758e07eb92b020
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Resolves: #1380175
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---
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src/core/manager.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/src/core/manager.c b/src/core/manager.c
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index 71dd70c94c..689b266158 100644
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--- a/src/core/manager.c
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+++ b/src/core/manager.c
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@@ -1678,6 +1678,10 @@ static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t
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return -errno;
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}
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+ if (n == 0) {
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+ log_debug("Got zero-length notification message. Ignoring.");
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+ return 0;
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+ }
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CMSG_FOREACH(cmsg, &msghdr) {
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if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) {
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