Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f49481bc50fce428521497977861b8115666dbe7
Commit: f49481bc50fce428521497977861b8115666dbe7
Parent: 2f7a2a79c3ebb44f8b1b7d9b4fd3a650eb69e544
Author: Andi Kleen <[EMAIL PROTECTED]>
AuthorDate: Tue Feb 13 13:26:24 2007 +0100
Committer: Andi Kleen <[EMAIL PROTECTED]>
CommitDate: Tue Feb 13 13:26:24 2007 +0100
[PATCH] x86-64: Check return value of putreg in PTRACE_SETREGS
This means if an illegal value is set for the segment registers there
ptrace will error out now with an errno instead of silently ignoring
it.
Signed-off-by: Andi Kleen <[EMAIL PROTECTED]>
---
arch/x86_64/kernel/ptrace.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/x86_64/kernel/ptrace.c b/arch/x86_64/kernel/ptrace.c
index addc14a..4326a69 100644
--- a/arch/x86_64/kernel/ptrace.c
+++ b/arch/x86_64/kernel/ptrace.c
@@ -536,8 +536,12 @@ long arch_ptrace(struct task_struct *child, long request,
long addr, long data)
}
ret = 0;
for (ui = 0; ui < sizeof(struct user_regs_struct); ui +=
sizeof(long)) {
- ret |= __get_user(tmp, (unsigned long __user *) data);
- putreg(child, ui, tmp);
+ ret = __get_user(tmp, (unsigned long __user *) data);
+ if (ret)
+ break;
+ ret = putreg(child, ui, tmp);
+ if (ret)
+ break;
data += sizeof(long);
}
break;
-
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