| 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
| ||
|
Date: Tue, 06 May 2008 18:08:17 -0700
From: Paul Menage <menage@...gle.com>
To: Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
Paul Jackson <pj@....com>, Ingo Molnar <mingo@...e.hu>,
Andrew Morton <akpm@...ux-foundation.org>
CC: linux-kernel@...r.kernel.org
Subject: [PATCH] Fix cpuset sched_relax_domain_level control file
Fix cpuset sched_relax_domain_level control file
Due to a merge conflict, the sched_relax_domain_level control file was
marked as being handled by cpuset_read/write_u64, but the code to handle it
was actually in cpuset_common_file_read/write.
Since the value being written/read is in fact a signed integer, it
should be treated as such; this patch adds cpuset_read/write_s64
functions, and uses them to handle the sched_relax_domain_level file.
With this patch, the sched_relax_domain_level can be read and written,
and the correct contents seen/updated.
Signed-off-by: Paul Menage <menage@...gle.com>
---
kernel/cpuset.c | 52 ++++++++++++++++++++++++++++++++++++++++------------
1 file changed, 40 insertions(+), 12 deletions(-)
Index: cpusetfix-2.6.26-rc1/kernel/cpuset.c
===================================================================
--- cpusetfix-2.6.26-rc1.orig/kernel/cpuset.c
+++ cpusetfix-2.6.26-rc1/kernel/cpuset.c
@@ -1031,11 +1031,9 @@ int current_cpuset_is_being_rebound(void
return task_cs(current) == cpuset_being_rebound;
}
-static int update_relax_domain_level(struct cpuset *cs, char *buf)
+static int update_relax_domain_level(struct cpuset *cs, s64 val)
{
- int val = simple_strtol(buf, NULL, 10);
-
- if (val < 0)
+ if ((int)val < 0)
val = -1;
if (val != cs->relax_domain_level) {
@@ -1280,9 +1278,6 @@ static ssize_t cpuset_common_file_write(
case FILE_MEMLIST:
retval = update_nodemask(cs, buffer);
break;
- case FILE_SCHED_RELAX_DOMAIN_LEVEL:
- retval = update_relax_domain_level(cs, buffer);
- break;
default:
retval = -EINVAL;
goto out2;
@@ -1348,6 +1343,30 @@ static int cpuset_write_u64(struct cgrou
return retval;
}
+static int cpuset_write_s64(struct cgroup *cgrp, struct cftype *cft, s64 val)
+{
+ int retval = 0;
+ struct cpuset *cs = cgroup_cs(cgrp);
+ cpuset_filetype_t type = cft->private;
+
+ cgroup_lock();
+
+ if (cgroup_is_removed(cgrp)) {
+ cgroup_unlock();
+ return -ENODEV;
+ }
+ switch (type) {
+ case FILE_SCHED_RELAX_DOMAIN_LEVEL:
+ retval = update_relax_domain_level(cs, val);
+ break;
+ default:
+ retval = -EINVAL;
+ break;
+ }
+ cgroup_unlock();
+ return retval;
+}
+
/*
* These ascii lists should be read in a single call, by using a user
* buffer large enough to hold the entire map. If read in smaller
@@ -1406,9 +1425,6 @@ static ssize_t cpuset_common_file_read(s
case FILE_MEMLIST:
s += cpuset_sprintf_memlist(s, cs);
break;
- case FILE_SCHED_RELAX_DOMAIN_LEVEL:
- s += sprintf(s, "%d", cs->relax_domain_level);
- break;
default:
retval = -EINVAL;
goto out;
@@ -1449,6 +1465,18 @@ static u64 cpuset_read_u64(struct cgroup
}
}
+static s64 cpuset_read_s64(struct cgroup *cont, struct cftype *cft)
+{
+ struct cpuset *cs = cgroup_cs(cont);
+ cpuset_filetype_t type = cft->private;
+ switch (type) {
+ case FILE_SCHED_RELAX_DOMAIN_LEVEL:
+ return cs->relax_domain_level;
+ default:
+ BUG();
+ }
+}
+
/*
* for the common functions, 'private' gives the type of file
@@ -1499,8 +1527,8 @@ static struct cftype files[] = {
{
.name = "sched_relax_domain_level",
- .read_u64 = cpuset_read_u64,
- .write_u64 = cpuset_write_u64,
+ .read_s64 = cpuset_read_s64,
+ .write_s64 = cpuset_write_s64,
.private = FILE_SCHED_RELAX_DOMAIN_LEVEL,
},
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists