The patch titled
Subject: ptrace: in PEEK_SIGINFO, check syscall bitness, not task bitness
has been added to the -mm tree. Its filename is
ptrace-in-peek_siginfo-check-syscall-bitness-not-task-bitness.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ptrace-in-peek_siginfo-check-syscall-bitness-not-task-bitness.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ptrace-in-peek_siginfo-check-syscall-bitness-not-task-bitness.patch
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------------------------------------------------------
From: Andy Lutomirski <luto@xxxxxxxxxx>
Subject: ptrace: in PEEK_SIGINFO, check syscall bitness, not task bitness
Users of the 32-bit ptrace() ABI expect the full 32-bit ABI. siginfo
translation should check ptrace() ABI, not caller task ABI.
This is an ABI change on SPARC. Let's hope that no one relied on the old
buggy ABI.
Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/ptrace.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/ptrace.c~ptrace-in-peek_siginfo-check-syscall-bitness-not-task-bitness kernel/ptrace.c
--- a/kernel/ptrace.c~ptrace-in-peek_siginfo-check-syscall-bitness-not-task-bitness
+++ a/kernel/ptrace.c
@@ -681,7 +681,7 @@ static int ptrace_peek_siginfo(struct ta
break;
#ifdef CONFIG_COMPAT
- if (unlikely(is_compat_task())) {
+ if (unlikely(in_compat_syscall())) {
compat_siginfo_t __user *uinfo = compat_ptr(data);
if (copy_siginfo_to_user32(uinfo, &info) ||
_
Patches currently in -mm which might be from luto@xxxxxxxxxx are
compat-add-in_compat_syscall-to-ask-whether-were-in-a-compat-syscall.patch
sparc-compat-provide-an-accurate-in_compat_syscall-implementation.patch
sparc-syscall-fix-syscall_get_arch.patch
seccomp-check-in_compat_syscall-not-is_compat_task-in-strict-mode.patch
ptrace-in-peek_siginfo-check-syscall-bitness-not-task-bitness.patch
auditsc-for-seccomp-events-log-syscall-compat-state-using-in_compat_syscall.patch
staging-lustre-switch-from-is_compat_task-to-in_compat_syscall.patch
ext4-in-ext4_dir_llseek-check-syscall-bitness-directly.patch
net-sctp-use-in_compat_syscall-for-sctp_getsockopt_connectx3.patch
net-xfrm_user-use-in_compat_syscall-to-deny-compat-syscalls.patch
firewire-use-in_compat_syscall-to-check-ioctl-compatness.patch
efivars-use-in_compat_syscall-to-check-for-compat-callers.patch
amdkfd-use-in_compat_syscall-to-check-open-caller-type.patch
input-redefine-input_compat_test-as-in_compat_syscall.patch
uhid-check-write-bitness-using-in_compat_syscall.patch
x86-compat-remove-is_compat_task.patch
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