[LTP] [PATCH 2/2 v2] security/dirtyc0w: synchronize parent and child
Jan Stancek
jstancek@redhat.com
Tue Oct 10 14:17:19 CEST 2017
----- Original Message -----
> Hi!
> > + (void)execvpe(TEST_APP, av, tst_ipc_envp);
> > + tst_brk(TBROK|TERRNO, "exec failed");
>
> Can we please add SAFE_EXECVPE() to the library?
>
> Other than that it looks good to me, acked.
I ran into a problem with older distros - execvpe() does not
exist there. How about we stay with execlp() and export
LTP_IPC_PATH by default, so that child inherits it?
Regards,
Jan
---
Subject: [PATCH/RFC] lib: add LTP_IPC_PATH to env. variables by default
Child started by exec() that needs to do tst_reinit() in order
to use checkpoints will inherit LTP_IPC_PATH by default.
Parent can choose to override/omit it in envp array when calling
exec[lvp]e().
Signed-off-by: Jan Stancek <jstancek@redhat.com>
---
lib/tst_test.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/lib/tst_test.c b/lib/tst_test.c
index 233b370794a6..27a0b7c36679 100644
--- a/lib/tst_test.c
+++ b/lib/tst_test.c
@@ -100,10 +100,12 @@ static void setup_ipc(void)
results = SAFE_MMAP(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, ipc_fd, 0);
/* Checkpoints needs to be accessible from processes started by exec() */
- if (tst_test->needs_checkpoints)
+ if (tst_test->needs_checkpoints) {
sprintf(ipc_path, IPC_ENV_VAR "=%s", shm_path);
- else
+ putenv(ipc_path);
+ } else {
SAFE_UNLINK(shm_path);
+ }
SAFE_CLOSE(ipc_fd);
More information about the ltp
mailing list