diff options
author | Dan Carpenter <dan.carpenter@oracle.com> | 2012-03-24 10:52:50 +0300 |
---|---|---|
committer | Willy Tarreau <w@1wt.eu> | 2012-10-07 23:41:02 +0200 |
commit | b655a07ff73516c3e7d588ef65f17b96953dca00 (patch) | |
tree | b5757aa7f96662936011b97a42c848650a819c78 /arch | |
parent | 9b1aa953f40336f8b31390c8bcafc9352ce8806e (diff) |
x86, tls: Off by one limit check
commit 8f0750f19789cf352d7e24a6cc50f2ab1b4f1372 upstream.
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
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/x86/kernel/tls.c | 4 |
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; |