diff options
| author | Andi Kleen <ak@suse.de> | 2005-05-16 21:53:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-17 07:59:15 -0700 |
| commit | d1099e8a18960693c04507bdd7b9403db70bfd97 (patch) | |
| tree | dab39ccad609234491bd1122f9dcae1f62a7abbc /arch | |
| parent | 312df5f1a1da780e084b328bcabb02a6dcd044c3 (diff) | |
[PATCH] x86_64: check if ptrace RIP is canonical
This works around an AMD Erratum.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86_64/kernel/ptrace.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/ptrace.c b/arch/x86_64/kernel/ptrace.c index e26e86bb56fe..892212161aa8 100644 --- a/arch/x86_64/kernel/ptrace.c +++ b/arch/x86_64/kernel/ptrace.c @@ -277,6 +277,11 @@ static int putreg(struct task_struct *child, return -EIO; value &= 0xffff; break; + case offsetof(struct user_regs_struct, rip): + /* Check if the new RIP address is canonical */ + if (value >= TASK_SIZE) + return -EIO; + break; } put_stack_long(child, regno - sizeof(struct pt_regs), value); return 0; |