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Commit 76b7f670 authored by Eric W. Biederman's avatar Eric W. Biederman
Browse files

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: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
parent 5611f55e

fs/signalfd.c

+5 −1
Original line number Diff line number Diff line
@@ -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)))

include/uapi/linux/signalfd.h

+5 −1
Original line number Diff line number Diff line
@@ -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];

};