fail posix_spawn file_actions operations with negative fds

[musl] / src / process / posix_spawn_file_actions_adddup2.c

diff --git a/src/process/posix_spawn_file_actions_adddup2.c b/src/process/posix_spawn_file_actions_adddup2.c
index 0367498..addca4d 100644 (file)
--- a/src/process/posix_spawn_file_actions_adddup2.c
+++ b/src/process/posix_spawn_file_actions_adddup2.c
@@ -5,6 +5,7 @@
 
 int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *fa, int srcfd, int fd)
 {
+       if (srcfd < 0 || fd < 0) return EBADF;
        struct fdop *op = malloc(sizeof *op);
        if (!op) return ENOMEM;
        op->cmd = FDOP_DUP2;