aboutsummaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
Diffstat (limited to 'arch')
-rw-r--r--arch/parisc/Kconfig.debug14
-rw-r--r--arch/parisc/include/asm/param.h23
-rw-r--r--arch/parisc/include/asm/system.h2
-rw-r--r--arch/parisc/include/asm/uaccess.h27
-rw-r--r--arch/parisc/include/asm/unistd.h4
-rw-r--r--arch/parisc/kernel/cache.c4
-rw-r--r--arch/parisc/kernel/syscall_table.S2
-rw-r--r--arch/parisc/kernel/time.c29
-rw-r--r--arch/parisc/kernel/unaligned.c14
-rw-r--r--arch/parisc/lib/memcpy.c3
10 files changed, 67 insertions, 55 deletions
diff --git a/arch/parisc/Kconfig.debug b/arch/parisc/Kconfig.debug
index bc989e522a0..7305ac8f7f5 100644
--- a/arch/parisc/Kconfig.debug
+++ b/arch/parisc/Kconfig.debug
@@ -12,4 +12,18 @@ config DEBUG_RODATA
portion of the kernel code won't be covered by a TLB anymore.
If in doubt, say "N".
+config DEBUG_STRICT_USER_COPY_CHECKS
+ bool "Strict copy size checks"
+ depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
+ ---help---
+ Enabling this option turns a certain set of sanity checks for user
+ copy operations into compile time failures.
+
+ The copy_from_user() etc checks are there to help test if there
+ are sufficient security checks on the length argument of
+ the copy operation, by having gcc prove that the argument is
+ within bounds.
+
+ If unsure, or if you run an older (pre 4.4) gcc, say N.
+
endmenu
diff --git a/arch/parisc/include/asm/param.h b/arch/parisc/include/asm/param.h
index 32e03d87785..965d4542797 100644
--- a/arch/parisc/include/asm/param.h
+++ b/arch/parisc/include/asm/param.h
@@ -1,22 +1 @@
-#ifndef _ASMPARISC_PARAM_H
-#define _ASMPARISC_PARAM_H
-
-#ifdef __KERNEL__
-#define HZ CONFIG_HZ
-#define USER_HZ 100 /* some user API use "ticks" */
-#define CLOCKS_PER_SEC (USER_HZ) /* like times() */
-#endif
-
-#ifndef HZ
-#define HZ 100
-#endif
-
-#define EXEC_PAGESIZE 4096
-
-#ifndef NOGROUP
-#define NOGROUP (-1)
-#endif
-
-#define MAXHOSTNAMELEN 64 /* max length of hostname */
-
-#endif
+#include <asm-generic/param.h>
diff --git a/arch/parisc/include/asm/system.h b/arch/parisc/include/asm/system.h
index d91357bca5b..4653c77bf9d 100644
--- a/arch/parisc/include/asm/system.h
+++ b/arch/parisc/include/asm/system.h
@@ -160,7 +160,7 @@ static inline void set_eiem(unsigned long val)
ldcd). */
#define __PA_LDCW_ALIGNMENT 4
-#define __ldcw_align(a) ((volatile unsigned int *)a)
+#define __ldcw_align(a) (&(a)->slock)
#define __LDCW "ldcw,co"
#endif /*!CONFIG_PA20*/
diff --git a/arch/parisc/include/asm/uaccess.h b/arch/parisc/include/asm/uaccess.h
index 7cf799d70b4..ff4cf9dab8d 100644
--- a/arch/parisc/include/asm/uaccess.h
+++ b/arch/parisc/include/asm/uaccess.h
@@ -7,6 +7,7 @@
#include <asm/page.h>
#include <asm/system.h>
#include <asm/cache.h>
+#include <asm/errno.h>
#include <asm-generic/uaccess-unaligned.h>
#define VERIFY_READ 0
@@ -234,13 +235,35 @@ extern long lstrnlen_user(const char __user *,long);
unsigned long copy_to_user(void __user *dst, const void *src, unsigned long len);
#define __copy_to_user copy_to_user
-unsigned long copy_from_user(void *dst, const void __user *src, unsigned long len);
-#define __copy_from_user copy_from_user
+unsigned long __copy_from_user(void *dst, const void __user *src, unsigned long len);
unsigned long copy_in_user(void __user *dst, const void __user *src, unsigned long len);
#define __copy_in_user copy_in_user
#define __copy_to_user_inatomic __copy_to_user
#define __copy_from_user_inatomic __copy_from_user
+extern void copy_from_user_overflow(void)
+#ifdef CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
+ __compiletime_error("copy_from_user() buffer size is not provably correct")
+#else
+ __compiletime_warning("copy_from_user() buffer size is not provably correct")
+#endif
+;
+
+static inline unsigned long __must_check copy_from_user(void *to,
+ const void __user *from,
+ unsigned long n)
+{
+ int sz = __compiletime_object_size(to);
+ int ret = -EFAULT;
+
+ if (likely(sz == -1 || !__builtin_constant_p(n) || sz >= n))
+ ret = __copy_from_user(to, from, n);
+ else
+ copy_from_user_overflow();
+
+ return ret;
+}
+
struct pt_regs;
int fixup_exception(struct pt_regs *regs);
diff --git a/arch/parisc/include/asm/unistd.h b/arch/parisc/include/asm/unistd.h
index cda158318c6..1ce7d2851d9 100644
--- a/arch/parisc/include/asm/unistd.h
+++ b/arch/parisc/include/asm/unistd.h
@@ -811,8 +811,10 @@
#define __NR_pwritev (__NR_Linux + 316)
#define __NR_rt_tgsigqueueinfo (__NR_Linux + 317)
#define __NR_perf_event_open (__NR_Linux + 318)
+#define __NR_recvmmsg (__NR_Linux + 319)
+#define __NR_accept4 (__NR_Linux + 320)
-#define __NR_Linux_syscalls (__NR_perf_event_open + 1)
+#define __NR_Linux_syscalls (__NR_accept4 + 1)
#define __IGNORE_select /* newselect */
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 1054baa2fc6..d054f3da3ff 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -171,14 +171,14 @@ parisc_cache_init(void)
cache_info.ic_conf.cc_cst,
cache_info.ic_conf.cc_hv);
- printk("D-TLB conf: sh %d page %d cst %d aid %d pad1 %d \n",
+ printk("D-TLB conf: sh %d page %d cst %d aid %d pad1 %d\n",
cache_info.dt_conf.tc_sh,
cache_info.dt_conf.tc_page,
cache_info.dt_conf.tc_cst,
cache_info.dt_conf.tc_aid,
cache_info.dt_conf.tc_pad1);
- printk("I-TLB conf: sh %d page %d cst %d aid %d pad1 %d \n",
+ printk("I-TLB conf: sh %d page %d cst %d aid %d pad1 %d\n",
cache_info.it_conf.tc_sh,
cache_info.it_conf.tc_page,
cache_info.it_conf.tc_cst,
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 01c4fcf8f48..de5f6dab48b 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -417,6 +417,8 @@
ENTRY_COMP(pwritev)
ENTRY_COMP(rt_tgsigqueueinfo)
ENTRY_SAME(perf_event_open)
+ ENTRY_COMP(recvmmsg)
+ ENTRY_SAME(accept4) /* 320 */
/* Nothing yet */
diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index a79c6f9e7e2..05511ccb61d 100644
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -250,9 +250,21 @@ static int __init rtc_init(void)
}
module_init(rtc_init);
-void __init time_init(void)
+void read_persistent_clock(struct timespec *ts)
{
static struct pdc_tod tod_data;
+ if (pdc_tod_read(&tod_data) == 0) {
+ ts->tv_sec = tod_data.tod_sec;
+ ts->tv_nsec = tod_data.tod_usec * 1000;
+ } else {
+ printk(KERN_ERR "Error reading tod clock\n");
+ ts->tv_sec = 0;
+ ts->tv_nsec = 0;
+ }
+}
+
+void __init time_init(void)
+{
unsigned long current_cr16_khz;
clocktick = (100 * PAGE0->mem_10msec) / HZ;
@@ -264,19 +276,4 @@ void __init time_init(void)
clocksource_cr16.mult = clocksource_khz2mult(current_cr16_khz,
clocksource_cr16.shift);
clocksource_register(&clocksource_cr16);
-
- if (pdc_tod_read(&tod_data) == 0) {
- unsigned long flags;
-
- write_seqlock_irqsave(&xtime_lock, flags);
- xtime.tv_sec = tod_data.tod_sec;
- xtime.tv_nsec = tod_data.tod_usec * 1000;
- set_normalized_timespec(&wall_to_monotonic,
- -xtime.tv_sec, -xtime.tv_nsec);
- write_sequnlock_irqrestore(&xtime_lock, flags);
- } else {
- printk(KERN_ERR "Error reading tod clock\n");
- xtime.tv_sec = 0;
- xtime.tv_nsec = 0;
- }
}
diff --git a/arch/parisc/kernel/unaligned.c b/arch/parisc/kernel/unaligned.c
index e6f4b7a4b7e..92d977bb5ea 100644
--- a/arch/parisc/kernel/unaligned.c
+++ b/arch/parisc/kernel/unaligned.c
@@ -25,6 +25,7 @@
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/signal.h>
+#include <linux/ratelimit.h>
#include <asm/uaccess.h>
/* #define DEBUG_UNALIGNED 1 */
@@ -446,8 +447,7 @@ static int emulate_std(struct pt_regs *regs, int frreg, int flop)
void handle_unaligned(struct pt_regs *regs)
{
- static unsigned long unaligned_count = 0;
- static unsigned long last_time = 0;
+ static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);
unsigned long newbase = R1(regs->iir)?regs->gr[R1(regs->iir)]:0;
int modify = 0;
int ret = ERR_NOTHANDLED;
@@ -460,14 +460,8 @@ void handle_unaligned(struct pt_regs *regs)
goto force_sigbus;
}
- if (unaligned_count > 5 &&
- time_after(jiffies, last_time + 5 * HZ)) {
- unaligned_count = 0;
- last_time = jiffies;
- }
-
- if (!(current->thread.flags & PARISC_UAC_NOPRINT)
- && ++unaligned_count < 5) {
+ if (!(current->thread.flags & PARISC_UAC_NOPRINT) &&
+ __ratelimit(&ratelimit)) {
char buf[256];
sprintf(buf, "%s(%d): unaligned access to 0x" RFMT " at ip=0x" RFMT "\n",
current->comm, task_pid_nr(current), regs->ior, regs->iaoq[0]);
diff --git a/arch/parisc/lib/memcpy.c b/arch/parisc/lib/memcpy.c
index abf41f4632a..1dbca5c31b3 100644
--- a/arch/parisc/lib/memcpy.c
+++ b/arch/parisc/lib/memcpy.c
@@ -475,7 +475,8 @@ unsigned long copy_to_user(void __user *dst, const void *src, unsigned long len)
return pa_memcpy((void __force *)dst, src, len);
}
-unsigned long copy_from_user(void *dst, const void __user *src, unsigned long len)
+EXPORT_SYMBOL(__copy_from_user);
+unsigned long __copy_from_user(void *dst, const void __user *src, unsigned long len)
{
mtsp(get_user_space(), 1);
mtsp(get_kernel_space(), 2);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 14:17:32 +0000