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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2012-03-24 08:52:50 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2012-03-28 18:39:35 +0200 |
| commit | 8f0750f19789cf352d7e24a6cc50f2ab1b4f1372 (patch) | |
| tree | 45be3ac15f47a9330604d1b21378e8dfa90251b3 /arch/x86/kernel/tls.c | |
| parent | x86/ioapic: Add io_apic_ops driver layer to allow interception (diff) | |
| download | linux-8f0750f19789cf352d7e24a6cc50f2ab1b4f1372.tar.xz linux-8f0750f19789cf352d7e24a6cc50f2ab1b4f1372.zip | |
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/kernel/tls.c')
| -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; |