The patch titled
CPU online file permission
has been added to the -mm tree. Its filename is
cpu-online-file-permission.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: CPU online file permission
From: Ulrich Drepper <drepper@xxxxxxxxxx>
Is there a reason why the "online" file in the subdirectories for the CPUs
in /sys/devices/system isn't world-readable? I cannot imagine it to be
security relevant especially now that a getcpu() syscall can be used to
determine what CPUa thread runs on.
The file is useful to correctly implement the sysconf() function to return
the number of online CPUs. In the presence of hotplug we currently cannot
provide this information. The patch below should to it.
Signed-off-by: Ulrich Drepper <drepper@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/base/cpu.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -puN drivers/base/cpu.c~cpu-online-file-permission drivers/base/cpu.c
--- a/drivers/base/cpu.c~cpu-online-file-permission
+++ a/drivers/base/cpu.c
@@ -53,7 +53,7 @@ static ssize_t store_online(struct sys_d
ret = count;
return ret;
}
-static SYSDEV_ATTR(online, 0600, show_online, store_online);
+static SYSDEV_ATTR(online, 0644, show_online, store_online);
static void __devinit register_cpu_control(struct cpu *cpu)
{
_
Patches currently in -mm which might be from drepper@xxxxxxxxxx are
origin.patch
cpu-online-file-permission.patch
futex-pass-nr_wake2-to-futex_wake_op.patch
-
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