| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20130408144341.7738da3c31074f7098898029@canb.auug.org.au>
Date: Mon, 8 Apr 2013 14:43:41 +1000
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Guenter Roeck <linux@...ck-us.net>,
Al Viro <viro@...iv.linux.org.uk>,
LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] Make do_sysinfo() static
The only use outside of kernel/timer.c was in kernel/compat.c, so move
compat_sys_sysinfo() next to sys_sysinfo() in kernel/timer.c.
Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
include/linux/kernel.h | 2 --
kernel/compat.c | 65 ----------------------------------------------
kernel/timer.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++-
3 files changed, 69 insertions(+), 68 deletions(-)
v2: I am so embarrassed that I forgot to include linux/compat.h in
kernel/timer.c :-)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 79fdd80..a8b579c 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -734,6 +734,4 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
# define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD
#endif
-extern int do_sysinfo(struct sysinfo *info);
-
#endif
diff --git a/kernel/compat.c b/kernel/compat.c
index 19971d8..1e8f145 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -1138,71 +1138,6 @@ asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
}
#endif
-struct compat_sysinfo {
- s32 uptime;
- u32 loads[3];
- u32 totalram;
- u32 freeram;
- u32 sharedram;
- u32 bufferram;
- u32 totalswap;
- u32 freeswap;
- u16 procs;
- u16 pad;
- u32 totalhigh;
- u32 freehigh;
- u32 mem_unit;
- char _f[20-2*sizeof(u32)-sizeof(int)];
-};
-
-asmlinkage long
-compat_sys_sysinfo(struct compat_sysinfo __user *info)
-{
- struct sysinfo s;
-
- do_sysinfo(&s);
-
- /* Check to see if any memory value is too large for 32-bit and scale
- * down if needed
- */
- if ((s.totalram >> 32) || (s.totalswap >> 32)) {
- int bitcount = 0;
-
- while (s.mem_unit < PAGE_SIZE) {
- s.mem_unit <<= 1;
- bitcount++;
- }
-
- s.totalram >>= bitcount;
- s.freeram >>= bitcount;
- s.sharedram >>= bitcount;
- s.bufferram >>= bitcount;
- s.totalswap >>= bitcount;
- s.freeswap >>= bitcount;
- s.totalhigh >>= bitcount;
- s.freehigh >>= bitcount;
- }
-
- if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) ||
- __put_user (s.uptime, &info->uptime) ||
- __put_user (s.loads[0], &info->loads[0]) ||
- __put_user (s.loads[1], &info->loads[1]) ||
- __put_user (s.loads[2], &info->loads[2]) ||
- __put_user (s.totalram, &info->totalram) ||
- __put_user (s.freeram, &info->freeram) ||
- __put_user (s.sharedram, &info->sharedram) ||
- __put_user (s.bufferram, &info->bufferram) ||
- __put_user (s.totalswap, &info->totalswap) ||
- __put_user (s.freeswap, &info->freeswap) ||
- __put_user (s.procs, &info->procs) ||
- __put_user (s.totalhigh, &info->totalhigh) ||
- __put_user (s.freehigh, &info->freehigh) ||
- __put_user (s.mem_unit, &info->mem_unit))
- return -EFAULT;
-
- return 0;
-}
-
COMPAT_SYSCALL_DEFINE2(sched_rr_get_interval,
compat_pid_t, pid,
struct compat_timespec __user *, interval)
diff --git a/kernel/timer.c b/kernel/timer.c
index dbf7a78..06b3245 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -41,6 +41,7 @@
#include <linux/sched.h>
#include <linux/sched/sysctl.h>
#include <linux/slab.h>
+#include <linux/compat.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
@@ -1567,7 +1568,7 @@ SYSCALL_DEFINE0(gettid)
* do_sysinfo - fill in sysinfo struct
* @info: pointer to buffer to fill
*/
-int do_sysinfo(struct sysinfo *info)
+static int do_sysinfo(struct sysinfo *info)
{
unsigned long mem_total, sav_total;
unsigned int mem_unit, bitcount;
@@ -1642,6 +1643,73 @@ SYSCALL_DEFINE1(sysinfo, struct sysinfo __user *, info)
return 0;
}
+#ifdef CONFIG_COMPAT
+struct compat_sysinfo {
+ s32 uptime;
+ u32 loads[3];
+ u32 totalram;
+ u32 freeram;
+ u32 sharedram;
+ u32 bufferram;
+ u32 totalswap;
+ u32 freeswap;
+ u16 procs;
+ u16 pad;
+ u32 totalhigh;
+ u32 freehigh;
+ u32 mem_unit;
+ char _f[20-2*sizeof(u32)-sizeof(int)];
+};
+
+asmlinkage long
+compat_sys_sysinfo(struct compat_sysinfo __user *info)
+{
+ struct sysinfo s;
+
+ do_sysinfo(&s);
+
+ /* Check to see if any memory value is too large for 32-bit and scale
+ * down if needed
+ */
+ if ((s.totalram >> 32) || (s.totalswap >> 32)) {
+ int bitcount = 0;
+
+ while (s.mem_unit < PAGE_SIZE) {
+ s.mem_unit <<= 1;
+ bitcount++;
+ }
+
+ s.totalram >>= bitcount;
+ s.freeram >>= bitcount;
+ s.sharedram >>= bitcount;
+ s.bufferram >>= bitcount;
+ s.totalswap >>= bitcount;
+ s.freeswap >>= bitcount;
+ s.totalhigh >>= bitcount;
+ s.freehigh >>= bitcount;
+ }
+
+ if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) ||
+ __put_user (s.uptime, &info->uptime) ||
+ __put_user (s.loads[0], &info->loads[0]) ||
+ __put_user (s.loads[1], &info->loads[1]) ||
+ __put_user (s.loads[2], &info->loads[2]) ||
+ __put_user (s.totalram, &info->totalram) ||
+ __put_user (s.freeram, &info->freeram) ||
+ __put_user (s.sharedram, &info->sharedram) ||
+ __put_user (s.bufferram, &info->bufferram) ||
+ __put_user (s.totalswap, &info->totalswap) ||
+ __put_user (s.freeswap, &info->freeswap) ||
+ __put_user (s.procs, &info->procs) ||
+ __put_user (s.totalhigh, &info->totalhigh) ||
+ __put_user (s.freehigh, &info->freehigh) ||
+ __put_user (s.mem_unit, &info->mem_unit))
+ return -EFAULT;
+
+ return 0;
+}
+#endif /* CONFIG_COMPAT */
+
static int __cpuinit init_timers_cpu(int cpu)
{
int j;
--
1.8.1
--
Cheers,
Stephen Rothwell sfr@...b.auug.org.au
Content of type "application/pgp-signature" skipped
Powered by blists - more mailing lists