| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Mon, 14 Jul 2014 12:14:57 +0200
From: "Helge Deller" <deller@....de>
To: "Richard Weinberger" <richard@....at>
Cc: linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
"James E.J. Bottomley" <jejb@...isc-linux.org>
Subject: Aw: [PATCH 15/43] parisc: Use get_signal() signal_setup_done()
Hi Richard,
nice work!
I pulled your tree and tested your patch series on parisc.
Everything seems OK.
Regarding the changes to the parisc arch, you can add my
Acked-by: Helge Deller <deller@....de>
Thanks!
Helge
> Betreff: [PATCH 15/43] parisc: Use get_signal() signal_setup_done()
>
> Use the more generic functions get_signal() signal_setup_done()
> for signal delivery.
>
> Signed-off-by: Richard Weinberger <richard@....at>
> ---
> arch/parisc/kernel/signal.c | 58 +++++++++++++++++++--------------------------
> 1 file changed, 24 insertions(+), 34 deletions(-)
>
> diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
> index 1cba8f2..012d4fa 100644
> --- a/arch/parisc/kernel/signal.c
> +++ b/arch/parisc/kernel/signal.c
> @@ -227,8 +227,8 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, int in_sysc
> }
>
> static long
> -setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
> - sigset_t *set, struct pt_regs *regs, int in_syscall)
> +setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
> + int in_syscall)
> {
> struct rt_sigframe __user *frame;
> unsigned long rp, usp;
> @@ -241,10 +241,10 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
>
> usp = (regs->gr[30] & ~(0x01UL));
> /*FIXME: frame_size parameter is unused, remove it. */
> - frame = get_sigframe(ka, usp, sizeof(*frame));
> + frame = get_sigframe(&ksig->ka, usp, sizeof(*frame));
>
> DBG(1,"SETUP_RT_FRAME: START\n");
> - DBG(1,"setup_rt_frame: frame %p info %p\n", frame, info);
> + DBG(1,"setup_rt_frame: frame %p info %p\n", frame, ksig->info);
>
>
> #ifdef CONFIG_64BIT
> @@ -253,7 +253,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
>
> if (is_compat_task()) {
> DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &compat_frame->info);
> - err |= copy_siginfo_to_user32(&compat_frame->info, info);
> + err |= copy_siginfo_to_user32(&compat_frame->info, &ksig->info);
> err |= __compat_save_altstack( &compat_frame->uc.uc_stack, regs->gr[30]);
> DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &compat_frame->uc);
> DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &compat_frame->uc.uc_mcontext);
> @@ -265,7 +265,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
> #endif
> {
> DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &frame->info);
> - err |= copy_siginfo_to_user(&frame->info, info);
> + err |= copy_siginfo_to_user(&frame->info, &ksig->info);
> err |= __save_altstack(&frame->uc.uc_stack, regs->gr[30]);
> DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &frame->uc);
> DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &frame->uc.uc_mcontext);
> @@ -275,7 +275,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
> }
>
> if (err)
> - goto give_sigsegv;
> + return -EFAULT;
>
> /* Set up to return from userspace. If provided, use a stub
> already in userspace. The first words of tramp are used to
> @@ -312,9 +312,9 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
> rp = (unsigned long) &frame->tramp[SIGRESTARTBLOCK_TRAMP];
>
> if (err)
> - goto give_sigsegv;
> + return -EFAULT;
>
> - haddr = A(ka->sa.sa_handler);
> + haddr = A(ksig->ka.sa.sa_handler);
> /* The sa_handler may be a pointer to a function descriptor */
> #ifdef CONFIG_64BIT
> if (is_compat_task()) {
> @@ -326,7 +326,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
> err = __copy_from_user(&fdesc, ufdesc, sizeof(fdesc));
>
> if (err)
> - goto give_sigsegv;
> + return -EFAULT;
>
> haddr = fdesc.addr;
> regs->gr[19] = fdesc.gp;
> @@ -339,7 +339,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
> err = __copy_from_user(&fdesc, ufdesc, sizeof(fdesc));
>
> if (err)
> - goto give_sigsegv;
> + return -EFAULT;
>
> haddr = fdesc.addr;
> regs->gr[19] = fdesc.gp;
> @@ -386,7 +386,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
> }
>
> regs->gr[2] = rp; /* userland return pointer */
> - regs->gr[26] = sig; /* signal number */
> + regs->gr[26] = ksig->sig; /* signal number */
>
> #ifdef CONFIG_64BIT
> if (is_compat_task()) {
> @@ -410,11 +410,6 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
> current->comm, current->pid, frame, regs->gr[30],
> regs->iaoq[0], regs->iaoq[1], rp);
>
> - return 1;
> -
> -give_sigsegv:
> - DBG(1,"setup_rt_frame: sending SIGSEGV\n");
> - force_sigsegv(sig, current);
> return 0;
> }
>
> @@ -423,20 +418,19 @@ give_sigsegv:
> */
>
> static void
> -handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
> - struct pt_regs *regs, int in_syscall)
> +handle_signal(struct ksignal *ksig, struct pt_regs *regs, int in_syscall)
> {
> + int ret;
> sigset_t *oldset = sigmask_to_save();
> +
> DBG(1,"handle_signal: sig=%ld, ka=%p, info=%p, oldset=%p, regs=%p\n",
> - sig, ka, info, oldset, regs);
> + ksig->sig, ksig->ka, ksig->info, oldset, regs);
>
> /* Set up the stack frame */
> - if (!setup_rt_frame(sig, ka, info, oldset, regs, in_syscall))
> - return;
> + ret = setup_rt_frame(ksig, oldset, regs, in_syscall);
>
> - signal_delivered(sig, info, ka, regs,
> - test_thread_flag(TIF_SINGLESTEP) ||
> - test_thread_flag(TIF_BLOCKSTEP));
> + signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP) ||
> + test_thread_flag(TIF_BLOCKSTEP));
>
> DBG(1,KERN_DEBUG "do_signal: Exit (success), regs->gr[28] = %ld\n",
> regs->gr[28]);
> @@ -544,22 +538,18 @@ insert_restart_trampoline(struct pt_regs *regs)
> asmlinkage void
> do_signal(struct pt_regs *regs, long in_syscall)
> {
> - siginfo_t info;
> - struct k_sigaction ka;
> - int signr;
> + struct ksignal ksig;
>
> DBG(1,"\ndo_signal: regs=0x%p, sr7 %#lx, in_syscall=%d\n",
> regs, regs->sr[7], in_syscall);
>
> - signr = get_signal_to_deliver(&info, &ka, regs, NULL);
> - DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]);
> -
> - if (signr > 0) {
> + if (get_signal(&ksig)) {
> + DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]);
> /* Restart a system call if necessary. */
> if (in_syscall)
> - syscall_restart(regs, &ka);
> + syscall_restart(regs, &ksig.ka);
>
> - handle_signal(signr, &info, &ka, regs, in_syscall);
> + handle_signal(&ksig, regs, in_syscall);
> return;
> }
>
> --
> 2.0.1
>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists