signal/signalfd: Add support for SIGSYS

I don't know why signalfd has never grown support for SIGSYS but grow it now.

This corrects an oversight and removes a need for a default in the
switch statement.  Allowing gcc to warn when future members are added
to the enum siginfo_layout, and signalfd does not handle them.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

diff --git a/fs/signalfd.c b/fs/signalfd.c
index 31e9602..f652249 100644 (file)
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -134,7 +134,6 @@ static int signalfd_copyinfo(struct signalfd_siginfo __user *uinfo,
                new.ssi_stime  = kinfo->si_stime;
                break;
        case SIL_RT:
-       default:
                /*
                 * This case catches also the signals queued by sigqueue().
                 */
@@ -143,6 +142,11 @@ static int signalfd_copyinfo(struct signalfd_siginfo __user *uinfo,
                new.ssi_ptr = (long) kinfo->si_ptr;
                new.ssi_int = kinfo->si_int;
                break;
+       case SIL_SYS:
+               new.ssi_call_addr = (long) kinfo->si_call_addr;
+               new.ssi_syscall   = kinfo->si_syscall;
+               new.ssi_arch      = kinfo->si_arch;
+               break;
        }
 
        if (copy_to_user(uinfo, &new, sizeof(struct signalfd_siginfo)))

diff --git a/include/uapi/linux/signalfd.h b/include/uapi/linux/signalfd.h
index 6f0da42..83429a0 100644 (file)
--- a/include/uapi/linux/signalfd.h
+++ b/include/uapi/linux/signalfd.h
@@ -35,6 +35,10 @@ struct signalfd_siginfo {
        __u64 ssi_stime;
        __u64 ssi_addr;
        __u16 ssi_addr_lsb;
+       __u16 __pad2;
+       __s32 ssi_syscall;
+       __u64 ssi_call_addr;
+       __u32 ssi_arch;
 
        /*
         * Pad strcture to 128 bytes. Remember to update the
@@ -45,7 +49,7 @@ struct signalfd_siginfo {
         * comes out of a read(2) and we really don't want to have
         * a compat on read(2).
         */
-       __u8 __pad[46];
+       __u8 __pad[28];
 };