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authorWill Drewry <wad@chromium.org>2012-04-17 23:48:58 +0400
committerJames Morris <james.l.morris@oracle.com>2012-04-18 06:24:52 +0400
commit8156b451f37898d3c3652b4e988a4d62ae16eaac (patch)
treee310c816de65d28f5b5ecf75bc890ccc8a2c2514 /kernel/seccomp.c
parente4da89d02f369450996cfd04f64b1cce4d8afaea (diff)
downloadlinux-8156b451f37898d3c3652b4e988a4d62ae16eaac.tar.xz
seccomp: fix build warnings when there is no CONFIG_SECCOMP_FILTER
If both audit and seccomp filter support are disabled, 'ret' is marked as unused. If just seccomp filter support is disabled, data and skip are considered unused. This change fixes those build warnings. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Will Drewry <wad@chromium.org> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to 'kernel/seccomp.c')
-rw-r--r--kernel/seccomp.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index d9db6ec46bc9..ee376beedaf9 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -377,8 +377,7 @@ int __secure_computing(int this_syscall)
int mode = current->seccomp.mode;
int exit_sig = 0;
int *syscall;
- u32 ret = SECCOMP_RET_KILL;
- int data;
+ u32 ret;
switch (mode) {
case SECCOMP_MODE_STRICT:
@@ -392,12 +391,15 @@ int __secure_computing(int this_syscall)
return 0;
} while (*++syscall);
exit_sig = SIGKILL;
+ ret = SECCOMP_RET_KILL;
break;
#ifdef CONFIG_SECCOMP_FILTER
- case SECCOMP_MODE_FILTER:
+ case SECCOMP_MODE_FILTER: {
+ int data;
ret = seccomp_run_filters(this_syscall);
data = ret & SECCOMP_RET_DATA;
- switch (ret & SECCOMP_RET_ACTION) {
+ ret &= SECCOMP_RET_ACTION;
+ switch (ret) {
case SECCOMP_RET_ERRNO:
/* Set the low-order 16-bits as a errno. */
syscall_set_return_value(current, task_pt_regs(current),
@@ -432,6 +434,7 @@ int __secure_computing(int this_syscall)
}
exit_sig = SIGSYS;
break;
+ }
#endif
default:
BUG();
@@ -442,8 +445,10 @@ int __secure_computing(int this_syscall)
#endif
audit_seccomp(this_syscall, exit_sig, ret);
do_exit(exit_sig);
+#ifdef CONFIG_SECCOMP_FILTER
skip:
audit_seccomp(this_syscall, exit_sig, ret);
+#endif
return -1;
}