Commit 0907a09c authored by Thomas Gleixner's avatar Thomas Gleixner

selftests/x86/ioperm: Extend testing so the shared bitmap is exercised

Add code to the fork path which forces the shared bitmap to be duplicated
and the reference count to be dropped. Verify that the child modifications
did not affect the parent.
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 4804e382
......@@ -131,6 +131,17 @@ int main(void)
printf("[RUN]\tchild: check that we inherited permissions\n");
expect_ok(0x80);
expect_gp(0xed);
printf("[RUN]\tchild: Extend permissions to 0x81\n");
if (ioperm(0x81, 1, 1) != 0) {
printf("[FAIL]\tioperm(0x81, 1, 1) failed (%d)", errno);
return 1;
}
printf("[RUN]\tchild: Drop permissions to 0x80\n");
if (ioperm(0x80, 1, 0) != 0) {
printf("[FAIL]\tioperm(0x80, 1, 0) failed (%d)", errno);
return 1;
}
expect_gp(0x80);
return 0;
} else {
int status;
......@@ -146,8 +157,11 @@ int main(void)
}
}
/* Test the capability checks. */
/* Verify that the child dropping 0x80 did not affect the parent */
printf("\tVerify that unsharing the bitmap worked\n");
expect_ok(0x80);
/* Test the capability checks. */
printf("\tDrop privileges\n");
if (setresuid(1, 1, 1) != 0) {
printf("[WARN]\tDropping privileges failed\n");
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment