autofs-5.1.4 - fix deadlock in dumpmaps

From: Ian Kent <raven@themaw.net>

Commit a223d11fa8e (autofs-5.1.3 - serialize calls to open_xxxx()

functions) introduces a deadlock when using the dumpmaps function.

In this case the open fd mutex needs to be unlocked in the forked

child process of the do_spawn() function.

Signed-off-by: Ian Kent <raven@themaw.net>

---

 CHANGELOG      |    1 +

 daemon/spawn.c |    1 +

 2 files changed, 2 insertions(+)

diff --git a/CHANGELOG b/CHANGELOG

index 2747327b..0f30596f 100644

--- a/CHANGELOG

+++ b/CHANGELOG

@@ -2,6 +2,7 @@ xx/xx/2018 autofs-5.1.5

 - fix flag file permission.

 - fix directory create permission.

 - fix use after free in do_master_list_reset().

+- fix deadlock in dumpmaps.

 19/12/2017 autofs-5.1.4

 - fix spec file url.

diff --git a/daemon/spawn.c b/daemon/spawn.c

index fabe577e..dbbca7fa 100644

--- a/daemon/spawn.c

+++ b/daemon/spawn.c

@@ -338,6 +338,7 @@ static int do_spawn(unsigned logopt, unsigned int wait,

 		dup2(pipefd[1], STDOUT_FILENO);

 		dup2(pipefd[1], STDERR_FILENO);

 		close(pipefd[1]);

+		open_mutex_unlock();

 		/* what to mount must always be second last */

 		while (*pargv++)