diff options
| author | Qiaowei Ren <qiaowei.ren@intel.com> | 2014-11-14 07:18:19 -0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-11-18 00:58:53 +0100 |
| commit | ee1b58d36aa1b5a79eaba11f5c3633c88231da83 (patch) | |
| tree | c27ee172205f77faf191d3112b5a88d688c722c4 | |
| parent | 62e7759b1bdaf9b753c3724a56fcbe3235ebd5f3 (diff) | |
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.ren@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: linux-mm@kvack.org
Cc: linux-mips@linux-mips.org
Cc: Dave Hansen <dave@sr71.net>
Link: http://lkml.kernel.org/r/20141114151819.1908C900@viggo.jf.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | include/uapi/asm-generic/siginfo.h | 9 | ||||
| -rw-r--r-- | kernel/signal.c | 4 |
2 files changed, 12 insertions, 1 deletions
diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h index ba5be7fdbdf..1e3552037a5 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 8f0876f9f6d..2c403a4c8be 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); |