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authorUlrich Drepper2007-07-31 00:38:16 -0700
committerLinus Torvalds2007-07-31 15:39:39 -0700
commit9eb3ff40376e505eafb927b4a4cbccc928df68ec (patch)
tree86566782602f9012935c2de195f970f878b94401 /drivers/base
parent07a304603cd0133468e3a153f4fe78b02733d0db (diff)
CPU online file permission
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@redhat.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/cpu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index fe7ef3394144..40545071e3c9 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -53,7 +53,7 @@ static ssize_t store_online(struct sys_device *dev, const char *buf,
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)
{