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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-23 18:50:11 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-23 18:50:11 -0800 |
commit | 9e2d59ad580d590134285f361a0e80f0e98c0207 (patch) | |
tree | f3232be75781484193413f32ec82c21f6d8eb76e /arch/arm64/kernel/signal32.c | |
parent | 5ce1a70e2f00f0bce0cab57f798ca354b9496169 (diff) | |
parent | 235b80226b986dabcbba844968f7807866bd0bfe (diff) | |
download | linux-stable-9e2d59ad580d590134285f361a0e80f0e98c0207.tar.gz linux-stable-9e2d59ad580d590134285f361a0e80f0e98c0207.tar.bz2 linux-stable-9e2d59ad580d590134285f361a0e80f0e98c0207.zip |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull signal handling cleanups from Al Viro:
"This is the first pile; another one will come a bit later and will
contain SYSCALL_DEFINE-related patches.
- a bunch of signal-related syscalls (both native and compat)
unified.
- a bunch of compat syscalls switched to COMPAT_SYSCALL_DEFINE
(fixing several potential problems with missing argument
validation, while we are at it)
- a lot of now-pointless wrappers killed
- a couple of architectures (cris and hexagon) forgot to save
altstack settings into sigframe, even though they used the
(uninitialized) values in sigreturn; fixed.
- microblaze fixes for delivery of multiple signals arriving at once
- saner set of helpers for signal delivery introduced, several
architectures switched to using those."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (143 commits)
x86: convert to ksignal
sparc: convert to ksignal
arm: switch to struct ksignal * passing
alpha: pass k_sigaction and siginfo_t using ksignal pointer
burying unused conditionals
make do_sigaltstack() static
arm64: switch to generic old sigaction() (compat-only)
arm64: switch to generic compat rt_sigaction()
arm64: switch compat to generic old sigsuspend
arm64: switch to generic compat rt_sigqueueinfo()
arm64: switch to generic compat rt_sigpending()
arm64: switch to generic compat rt_sigprocmask()
arm64: switch to generic sigaltstack
sparc: switch to generic old sigsuspend
sparc: COMPAT_SYSCALL_DEFINE does all sign-extension as well as SYSCALL_DEFINE
sparc: kill sign-extending wrappers for native syscalls
kill sparc32_open()
sparc: switch to use of generic old sigaction
sparc: switch sys_compat_rt_sigaction() to COMPAT_SYSCALL_DEFINE
mips: switch to generic sys_fork() and sys_clone()
...
Diffstat (limited to 'arch/arm64/kernel/signal32.c')
-rw-r--r-- | arch/arm64/kernel/signal32.c | 220 |
1 files changed, 2 insertions, 218 deletions
diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c index 41db148a7eb9..7f4f3673f2bc 100644 --- a/arch/arm64/kernel/signal32.c +++ b/arch/arm64/kernel/signal32.c @@ -28,26 +28,6 @@ #include <asm/uaccess.h> #include <asm/unistd32.h> -struct compat_sigaction { - compat_uptr_t sa_handler; - compat_ulong_t sa_flags; - compat_uptr_t sa_restorer; - compat_sigset_t sa_mask; -}; - -struct compat_old_sigaction { - compat_uptr_t sa_handler; - compat_old_sigset_t sa_mask; - compat_ulong_t sa_flags; - compat_uptr_t sa_restorer; -}; - -typedef struct compat_sigaltstack { - compat_uptr_t ss_sp; - int ss_flags; - compat_size_t ss_size; -} compat_stack_t; - struct compat_sigcontext { /* We always set these two fields to 0 */ compat_ulong_t trap_no; @@ -339,127 +319,6 @@ static int compat_restore_vfp_context(struct compat_vfp_sigframe __user *frame) return err ? -EFAULT : 0; } -/* - * atomically swap in the new signal mask, and wait for a signal. - */ -asmlinkage int compat_sys_sigsuspend(int restart, compat_ulong_t oldmask, - compat_old_sigset_t mask) -{ - sigset_t blocked; - - siginitset(¤t->blocked, mask); - return sigsuspend(&blocked); -} - -asmlinkage int compat_sys_sigaction(int sig, - const struct compat_old_sigaction __user *act, - struct compat_old_sigaction __user *oact) -{ - struct k_sigaction new_ka, old_ka; - int ret; - compat_old_sigset_t mask; - compat_uptr_t handler, restorer; - - if (act) { - if (!access_ok(VERIFY_READ, act, sizeof(*act)) || - __get_user(handler, &act->sa_handler) || - __get_user(restorer, &act->sa_restorer) || - __get_user(new_ka.sa.sa_flags, &act->sa_flags) || - __get_user(mask, &act->sa_mask)) - return -EFAULT; - - new_ka.sa.sa_handler = compat_ptr(handler); - new_ka.sa.sa_restorer = compat_ptr(restorer); - siginitset(&new_ka.sa.sa_mask, mask); - } - - ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); - - if (!ret && oact) { - if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || - __put_user(ptr_to_compat(old_ka.sa.sa_handler), - &oact->sa_handler) || - __put_user(ptr_to_compat(old_ka.sa.sa_restorer), - &oact->sa_restorer) || - __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || - __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) - return -EFAULT; - } - - return ret; -} - -asmlinkage int compat_sys_rt_sigaction(int sig, - const struct compat_sigaction __user *act, - struct compat_sigaction __user *oact, - compat_size_t sigsetsize) -{ - struct k_sigaction new_ka, old_ka; - int ret; - - /* XXX: Don't preclude handling different sized sigset_t's. */ - if (sigsetsize != sizeof(compat_sigset_t)) - return -EINVAL; - - if (act) { - compat_uptr_t handler, restorer; - - ret = get_user(handler, &act->sa_handler); - new_ka.sa.sa_handler = compat_ptr(handler); - ret |= get_user(restorer, &act->sa_restorer); - new_ka.sa.sa_restorer = compat_ptr(restorer); - ret |= get_sigset_t(&new_ka.sa.sa_mask, &act->sa_mask); - ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); - if (ret) - return -EFAULT; - } - - ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); - if (!ret && oact) { - ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler); - ret |= put_sigset_t(&oact->sa_mask, &old_ka.sa.sa_mask); - ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); - } - return ret; -} - -int compat_do_sigaltstack(compat_uptr_t compat_uss, compat_uptr_t compat_uoss, - compat_ulong_t sp) -{ - compat_stack_t __user *newstack = compat_ptr(compat_uss); - compat_stack_t __user *oldstack = compat_ptr(compat_uoss); - compat_uptr_t ss_sp; - int ret; - mm_segment_t old_fs; - stack_t uss, uoss; - - /* Marshall the compat new stack into a stack_t */ - if (newstack) { - if (get_user(ss_sp, &newstack->ss_sp) || - __get_user(uss.ss_flags, &newstack->ss_flags) || - __get_user(uss.ss_size, &newstack->ss_size)) - return -EFAULT; - uss.ss_sp = compat_ptr(ss_sp); - } - - old_fs = get_fs(); - set_fs(KERNEL_DS); - /* The __user pointer casts are valid because of the set_fs() */ - ret = do_sigaltstack( - newstack ? (stack_t __user *) &uss : NULL, - oldstack ? (stack_t __user *) &uoss : NULL, - (unsigned long)sp); - set_fs(old_fs); - - /* Convert the old stack_t into a compat stack. */ - if (!ret && oldstack && - (put_user(ptr_to_compat(uoss.ss_sp), &oldstack->ss_sp) || - __put_user(uoss.ss_flags, &oldstack->ss_flags) || - __put_user(uoss.ss_size, &oldstack->ss_size))) - return -EFAULT; - return ret; -} - static int compat_restore_sigframe(struct pt_regs *regs, struct compat_sigframe __user *sf) { @@ -562,9 +421,7 @@ asmlinkage int compat_sys_rt_sigreturn(struct pt_regs *regs) if (compat_restore_sigframe(regs, &frame->sig)) goto badframe; - if (compat_do_sigaltstack(ptr_to_compat(&frame->sig.uc.uc_stack), - ptr_to_compat((void __user *)NULL), - regs->compat_sp) == -EFAULT) + if (compat_restore_altstack(&frame->sig.uc.uc_stack)) goto badframe; return regs->regs[0]; @@ -705,11 +562,7 @@ int compat_setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info, __put_user_error(0, &frame->sig.uc.uc_flags, err); __put_user_error(0, &frame->sig.uc.uc_link, err); - memset(&stack, 0, sizeof(stack)); - stack.ss_sp = (compat_uptr_t)current->sas_ss_sp; - stack.ss_flags = sas_ss_flags(regs->compat_sp); - stack.ss_size = current->sas_ss_size; - err |= __copy_to_user(&frame->sig.uc.uc_stack, &stack, sizeof(stack)); + err |= __compat_save_altstack(&frame->sig.uc.uc_stack, regs->compat_sp); err |= compat_setup_sigframe(&frame->sig, regs, set); @@ -742,75 +595,6 @@ int compat_setup_frame(int usig, struct k_sigaction *ka, sigset_t *set, return err; } -/* - * RT signals don't have generic compat wrappers. - * See arch/powerpc/kernel/signal_32.c - */ -asmlinkage int compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, - compat_sigset_t __user *oset, - compat_size_t sigsetsize) -{ - sigset_t s; - sigset_t __user *up; - int ret; - mm_segment_t old_fs = get_fs(); - - if (set) { - if (get_sigset_t(&s, set)) - return -EFAULT; - } - - set_fs(KERNEL_DS); - /* This is valid because of the set_fs() */ - up = (sigset_t __user *) &s; - ret = sys_rt_sigprocmask(how, set ? up : NULL, oset ? up : NULL, - sigsetsize); - set_fs(old_fs); - if (ret) - return ret; - if (oset) { - if (put_sigset_t(oset, &s)) - return -EFAULT; - } - return 0; -} - -asmlinkage int compat_sys_rt_sigpending(compat_sigset_t __user *set, - compat_size_t sigsetsize) -{ - sigset_t s; - int ret; - mm_segment_t old_fs = get_fs(); - - set_fs(KERNEL_DS); - /* The __user pointer cast is valid because of the set_fs() */ - ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize); - set_fs(old_fs); - if (!ret) { - if (put_sigset_t(set, &s)) - return -EFAULT; - } - return ret; -} - -asmlinkage int compat_sys_rt_sigqueueinfo(int pid, int sig, - compat_siginfo_t __user *uinfo) -{ - siginfo_t info; - int ret; - mm_segment_t old_fs = get_fs(); - - ret = copy_siginfo_from_user32(&info, uinfo); - if (unlikely(ret)) - return ret; - - set_fs (KERNEL_DS); - /* The __user pointer cast is valid because of the set_fs() */ - ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info); - set_fs (old_fs); - return ret; -} - void compat_setup_restart_syscall(struct pt_regs *regs) { regs->regs[7] = __NR_compat_restart_syscall; |