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signal/signalfd: Add support for SIGSYS

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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>
This commit is contained in:
Eric W. Biederman 2018-04-24 20:48:32 -05:00
parent 5611f55ee4
commit 76b7f67073
2 changed files with 10 additions and 2 deletions
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6
fs/signalfd.c
View File

@ -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)))

6
include/uapi/linux/signalfd.h
View File

@ -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];
};