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-rw-r--r--fs/signalfd.c10
-rw-r--r--include/linux/signalfd.h3
2 files changed, 12 insertions, 1 deletions
diff --git a/fs/signalfd.c b/fs/signalfd.c
index 1c5a6add779d..bdd4496ae67f 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -99,6 +99,16 @@ static int signalfd_copyinfo(struct signalfd_siginfo __user *uinfo,
#ifdef __ARCH_SI_TRAPNO
err |= __put_user(kinfo->si_trapno, &uinfo->ssi_trapno);
#endif
+#ifdef BUS_MCEERR_AO
+ /*
+ * Other callers might not initialize the si_lsb field,
+ * so check explicitly for the right codes here.
+ */
+ if (kinfo->si_code == BUS_MCEERR_AR ||
+ kinfo->si_code == BUS_MCEERR_AO)
+ err |= __put_user((short) kinfo->si_addr_lsb,
+ &uinfo->ssi_addr_lsb);
+#endif
break;
case __SI_CHLD:
err |= __put_user(kinfo->si_pid, &uinfo->ssi_pid);
diff --git a/include/linux/signalfd.h b/include/linux/signalfd.h
index b363b916c909..3ff4961da9b5 100644
--- a/include/linux/signalfd.h
+++ b/include/linux/signalfd.h
@@ -33,6 +33,7 @@ struct signalfd_siginfo {
__u64 ssi_utime;
__u64 ssi_stime;
__u64 ssi_addr;
+ __u16 ssi_addr_lsb;
/*
* Pad strcture to 128 bytes. Remember to update the
@@ -43,7 +44,7 @@ struct signalfd_siginfo {
* comes out of a read(2) and we really don't want to have
* a compat on read(2).
*/
- __u8 __pad[48];
+ __u8 __pad[46];
};