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| author | Tiezhu Yang <yangtiezhu@loongson.cn> | 2021-12-20 12:27:39 +0800 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2022-01-02 14:16:40 +0100 |
| commit | 408bd9ddc2476c2de80ae88cdd3c74717e86ef91 (patch) | |
| tree | 122a09601b557c04e576f7a3b3252096767e81e4 /arch/mips/kernel/signal.c | |
| parent | 0ebd37a2222f6b6f1b55b385e40d16a5ce15cb6a (diff) | |
| download | linux-stable-408bd9ddc2476c2de80ae88cdd3c74717e86ef91.tar.gz linux-stable-408bd9ddc2476c2de80ae88cdd3c74717e86ef91.tar.bz2 linux-stable-408bd9ddc2476c2de80ae88cdd3c74717e86ef91.zip | |
MIPS: signal: Return immediately if call fails
When debug sigaltstack(), copy_siginfo_to_user() fails first in
setup_rt_frame() if the alternate signal stack is too small, so
it should return immediately if call fails, no need to call the
following functions.
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'arch/mips/kernel/signal.c')
| -rw-r--r-- | arch/mips/kernel/signal.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c index c1632e87b679..5bce782e694c 100644 --- a/arch/mips/kernel/signal.c +++ b/arch/mips/kernel/signal.c @@ -754,23 +754,25 @@ static int setup_rt_frame(void *sig_return, struct ksignal *ksig, struct pt_regs *regs, sigset_t *set) { struct rt_sigframe __user *frame; - int err = 0; frame = get_sigframe(ksig, regs, sizeof(*frame)); if (!access_ok(frame, sizeof (*frame))) return -EFAULT; /* Create siginfo. */ - err |= copy_siginfo_to_user(&frame->rs_info, &ksig->info); + if (copy_siginfo_to_user(&frame->rs_info, &ksig->info)) + return -EFAULT; /* Create the ucontext. */ - err |= __put_user(0, &frame->rs_uc.uc_flags); - err |= __put_user(NULL, &frame->rs_uc.uc_link); - err |= __save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]); - err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext); - err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set)); - - if (err) + if (__put_user(0, &frame->rs_uc.uc_flags)) + return -EFAULT; + if (__put_user(NULL, &frame->rs_uc.uc_link)) + return -EFAULT; + if (__save_altstack(&frame->rs_uc.uc_stack, regs->regs[29])) + return -EFAULT; + if (setup_sigcontext(regs, &frame->rs_uc.uc_mcontext)) + return -EFAULT; + if (__copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set))) return -EFAULT; /* |