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authorDan Carpenter <dan.carpenter@oracle.com>2012-03-24 10:52:50 +0300
committerH. Peter Anvin <hpa@zytor.com>2012-03-28 09:39:35 -0700
commit8f0750f19789cf352d7e24a6cc50f2ab1b4f1372 (patch)
tree45be3ac15f47a9330604d1b21378e8dfa90251b3 /arch/x86
parent136d249ef7dbf0fefa292082cc40be1ea864cbd6 (diff)
x86, tls: Off by one limit check
These are used as offsets into an array of GDT_ENTRY_TLS_ENTRIES members so GDT_ENTRY_TLS_ENTRIES is one past the end of the array. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Link: http://lkml.kernel.org/r/20120324075250.GA28258@elgon.mountain Cc: <stable@vger.kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/tls.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/tls.c b/arch/x86/kernel/tls.c
index 6bb7b8579e70..bcfec2d23769 100644
--- a/arch/x86/kernel/tls.c
+++ b/arch/x86/kernel/tls.c
@@ -163,7 +163,7 @@ int regset_tls_get(struct task_struct *target, const struct user_regset *regset,
{
const struct desc_struct *tls;
- if (pos > GDT_ENTRY_TLS_ENTRIES * sizeof(struct user_desc) ||
+ if (pos >= GDT_ENTRY_TLS_ENTRIES * sizeof(struct user_desc) ||
(pos % sizeof(struct user_desc)) != 0 ||
(count % sizeof(struct user_desc)) != 0)
return -EINVAL;
@@ -198,7 +198,7 @@ int regset_tls_set(struct task_struct *target, const struct user_regset *regset,
struct user_desc infobuf[GDT_ENTRY_TLS_ENTRIES];
const struct user_desc *info;
- if (pos > GDT_ENTRY_TLS_ENTRIES * sizeof(struct user_desc) ||
+ if (pos >= GDT_ENTRY_TLS_ENTRIES * sizeof(struct user_desc) ||
(pos % sizeof(struct user_desc)) != 0 ||
(count % sizeof(struct user_desc)) != 0)
return -EINVAL;