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seccomp: fix build warnings when there is no CONFIG_SECCOMP_FILTER

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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>
This commit is contained in:
Will Drewry 2012-04-17 14:48:58 -05:00 committed by James Morris
parent e4da89d02f
commit 8156b451f3
1 changed files with 9 additions and 4 deletions
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13
kernel/seccomp.c
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@ -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;
}