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| author | Ram Pai <linuxram@us.ibm.com> | 2018-01-18 17:50:42 -0800 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-20 22:59:05 +1100 |
| commit | 99cd1302327a2ccaedf905e9f6a8d8fd234bd485 (patch) | |
| tree | fe969743ada5b66e4bfe93eb960d3eb3265ea8d8 /arch/powerpc/kernel/traps.c | |
| parent | 087003e9ef7c1c5bec932387e47511429eff2a54 (diff) | |
| download | lwn-99cd1302327a2ccaedf905e9f6a8d8fd234bd485.tar.gz lwn-99cd1302327a2ccaedf905e9f6a8d8fd234bd485.zip | |
powerpc: Deliver SEGV signal on pkey violation
The value of the pkey, whose protection got violated,
is made available in si_pkey field of the siginfo structure.
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/traps.c')
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index d139117d3339..4b1a8e2ec023 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -20,6 +20,7 @@ #include <linux/sched/debug.h> #include <linux/kernel.h> #include <linux/mm.h> +#include <linux/pkeys.h> #include <linux/stddef.h> #include <linux/unistd.h> #include <linux/ptrace.h> @@ -266,7 +267,9 @@ void user_single_step_siginfo(struct task_struct *tsk, info->si_addr = (void __user *)regs->nip; } -void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr) + +void _exception_pkey(int signr, struct pt_regs *regs, int code, + unsigned long addr, int key) { siginfo_t info; const char fmt32[] = KERN_INFO "%s[%d]: unhandled signal %d " \ @@ -293,9 +296,16 @@ void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr) info.si_signo = signr; info.si_code = code; info.si_addr = (void __user *) addr; + info.si_pkey = key; + force_sig_info(signr, &info, current); } +void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr) +{ + _exception_pkey(signr, regs, code, addr, 0); +} + void system_reset_exception(struct pt_regs *regs) { /* |