diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2020-02-15 21:25:14 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-03-26 14:57:10 -0400 |
| commit | 791612e9668cecbf5dd24d13400ac74e099f005c (patch) | |
| tree | d2b2e94347c7922600b62a3eab007b596609c7c0 /arch/x86 | |
| parent | ead8e4e7e2c75ced6fcd9a53d3e9a2ecd7368553 (diff) | |
x86: x32_setup_rt_frame(): consolidate uaccess areas
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/signal.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c index e37d5a1bb713..38b359325291 100644 --- a/arch/x86/kernel/signal.c +++ b/arch/x86/kernel/signal.c @@ -517,7 +517,6 @@ static int x32_setup_rt_frame(struct ksignal *ksig, struct rt_sigframe_x32 __user *frame; unsigned long uc_flags; void __user *restorer; - int err = 0; void __user *fp = NULL; if (!(ksig->ka.sa.sa_flags & SA_RESTORER)) @@ -525,14 +524,6 @@ static int x32_setup_rt_frame(struct ksignal *ksig, frame = get_sigframe(&ksig->ka, regs, sizeof(*frame), &fp); - if (!access_ok(frame, sizeof(*frame))) - return -EFAULT; - - if (ksig->ka.sa.sa_flags & SA_SIGINFO) { - if (__copy_siginfo_to_user32(&frame->info, &ksig->info, true)) - return -EFAULT; - } - uc_flags = frame_uc_flags(regs); if (!user_access_begin(frame, sizeof(*frame))) @@ -546,11 +537,13 @@ static int x32_setup_rt_frame(struct ksignal *ksig, restorer = ksig->ka.sa.sa_restorer; unsafe_put_user(restorer, (unsigned long __user *)&frame->pretcode, Efault); unsafe_put_sigcontext(&frame->uc.uc_mcontext, fp, regs, set, Efault); + unsafe_put_user(*(__u64 *)set, (__u64 __user *)&frame->uc.uc_sigmask, Efault); user_access_end(); - err |= __put_user(*(__u64 *)set, (__u64 __user *)&frame->uc.uc_sigmask); - if (err) - return -EFAULT; + if (ksig->ka.sa.sa_flags & SA_SIGINFO) { + if (__copy_siginfo_to_user32(&frame->info, &ksig->info, true)) + return -EFAULT; + } /* Set up registers for signal handler */ regs->sp = (unsigned long) frame; |