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coredump: allow only empty messages after first "sentinel"

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This commit is contained in:
Michal Sekletar 2024-10-30 14:55:09 +01:00 committed by Luca Boccassi
parent f7d5d7c593
commit d9fd1d3707
1 changed files with 8 additions and 2 deletions
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10
src/coredump/coredump.c
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@ -1151,8 +1151,14 @@ static int process_socket(int fd) {
r = log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Received unexpected file descriptors.");
goto finish;
} else
cmsg_close_all(&mh);
}
cmsg_close_all(&mh);
/* Only zero length messages are allowed after the first message that carried a file descriptor. */
if (!first) {
r = log_error_errno(SYNTHETIC_ERRNO(EBADMSG), "Received unexpected message with non zero length.");
goto finish;
}
/* Add trailing NUL byte, in case these are strings */
((char*) iovec.iov_base)[n] = 0;