Commit-ID: ee1b58d36aa1b5a79eaba11f5c3633c88231da83 Gitweb: http://git.kernel.org/tip/ee1b58d36aa1b5a79eaba11f5c3633c88231da83 Author: Qiaowei Ren <qiaowei....@intel.com> AuthorDate: Fri, 14 Nov 2014 07:18:19 -0800 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Tue, 18 Nov 2014 00:58:53 +0100
mpx: Extend siginfo structure to include bound violation information This patch adds new fields about bound violation into siginfo structure. si_lower and si_upper are respectively lower bound and upper bound when bound violation is caused. Signed-off-by: Qiaowei Ren <qiaowei....@intel.com> Signed-off-by: Dave Hansen <dave.han...@linux.intel.com> Cc: linux...@kvack.org Cc: linux-m...@linux-mips.org Cc: Dave Hansen <d...@sr71.net> Link: http://lkml.kernel.org/r/20141114151819.1908c...@viggo.jf.intel.com Signed-off-by: Thomas Gleixner <t...@linutronix.de> --- include/uapi/asm-generic/siginfo.h | 9 ++++++++- kernel/signal.c | 4 ++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h index ba5be7f..1e35520 100644 --- a/include/uapi/asm-generic/siginfo.h +++ b/include/uapi/asm-generic/siginfo.h @@ -91,6 +91,10 @@ typedef struct siginfo { int _trapno; /* TRAP # which caused the signal */ #endif short _addr_lsb; /* LSB of the reported address */ + struct { + void __user *_lower; + void __user *_upper; + } _addr_bnd; } _sigfault; /* SIGPOLL */ @@ -131,6 +135,8 @@ typedef struct siginfo { #define si_trapno _sifields._sigfault._trapno #endif #define si_addr_lsb _sifields._sigfault._addr_lsb +#define si_lower _sifields._sigfault._addr_bnd._lower +#define si_upper _sifields._sigfault._addr_bnd._upper #define si_band _sifields._sigpoll._band #define si_fd _sifields._sigpoll._fd #ifdef __ARCH_SIGSYS @@ -199,7 +205,8 @@ typedef struct siginfo { */ #define SEGV_MAPERR (__SI_FAULT|1) /* address not mapped to object */ #define SEGV_ACCERR (__SI_FAULT|2) /* invalid permissions for mapped object */ -#define NSIGSEGV 2 +#define SEGV_BNDERR (__SI_FAULT|3) /* failed address bound checks */ +#define NSIGSEGV 3 /* * SIGBUS si_codes diff --git a/kernel/signal.c b/kernel/signal.c index 8f0876f..2c403a4 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2748,6 +2748,10 @@ int copy_siginfo_to_user(siginfo_t __user *to, const siginfo_t *from) if (from->si_code == BUS_MCEERR_AR || from->si_code == BUS_MCEERR_AO) err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb); #endif +#ifdef SEGV_BNDERR + err |= __put_user(from->si_lower, &to->si_lower); + err |= __put_user(from->si_upper, &to->si_upper); +#endif break; case __SI_CHLD: err |= __put_user(from->si_pid, &to->si_pid); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
