diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-04-22 16:59:56 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-05-21 23:59:21 -0400 |
| commit | a46808e1b75216f175a12cd16e3af3be2d4a53d4 (patch) | |
| tree | e848ce1a583e7c7720edede1431325089681e5b5 /arch/sh/kernel/signal_32.c | |
| parent | 187cd44e147ec7245ddd97bbd3305d29583288a9 (diff) | |
sh: missing checks of __get_user()/__put_user() return values
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/sh/kernel/signal_32.c')
| -rw-r--r-- | arch/sh/kernel/signal_32.c | 37 |
1 files changed, 21 insertions, 16 deletions
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c index 04d776f35869..cb4172c8af7d 100644 --- a/arch/sh/kernel/signal_32.c +++ b/arch/sh/kernel/signal_32.c @@ -71,10 +71,10 @@ sys_sigaction(int sig, const struct old_sigaction __user *act, old_sigset_t mask; if (!access_ok(VERIFY_READ, act, sizeof(*act)) || __get_user(new_ka.sa.sa_handler, &act->sa_handler) || - __get_user(new_ka.sa.sa_restorer, &act->sa_restorer)) + __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) || + __get_user(new_ka.sa.sa_flags, &act->sa_flags) || + __get_user(mask, &act->sa_mask)) return -EFAULT; - __get_user(new_ka.sa.sa_flags, &act->sa_flags); - __get_user(mask, &act->sa_mask); siginitset(&new_ka.sa.sa_mask, mask); } @@ -83,10 +83,10 @@ sys_sigaction(int sig, const struct old_sigaction __user *act, if (!ret && oact) { if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || - __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer)) + __put_user(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; - __put_user(old_ka.sa.sa_flags, &oact->sa_flags); - __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); } return ret; @@ -150,12 +150,11 @@ static inline int save_sigcontext_fpu(struct sigcontext __user *sc, if (!(boot_cpu_data.flags & CPU_HAS_FPU)) return 0; - if (!used_math()) { - __put_user(0, &sc->sc_ownedfp); - return 0; - } + if (!used_math()) + return __put_user(0, &sc->sc_ownedfp); - __put_user(1, &sc->sc_ownedfp); + if (__put_user(1, &sc->sc_ownedfp)) + return -EFAULT; /* This will cause a "finit" to be triggered by the next attempted FPU operation by the 'current' process. @@ -195,7 +194,7 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *r0_p regs->sr |= SR_FD; /* Release FPU */ clear_fpu(tsk, regs); clear_used_math(); - __get_user (owned_fp, &sc->sc_ownedfp); + err |= __get_user (owned_fp, &sc->sc_ownedfp); if (owned_fp) err |= restore_sigcontext_fpu(sc); } @@ -386,11 +385,14 @@ static int setup_frame(int sig, struct k_sigaction *ka, struct fdpic_func_descriptor __user *funcptr = (struct fdpic_func_descriptor __user *)ka->sa.sa_handler; - __get_user(regs->pc, &funcptr->text); - __get_user(regs->regs[12], &funcptr->GOT); + err |= __get_user(regs->pc, &funcptr->text); + err |= __get_user(regs->regs[12], &funcptr->GOT); } else regs->pc = (unsigned long)ka->sa.sa_handler; + if (err) + goto give_sigsegv; + set_fs(USER_DS); pr_debug("SIG deliver (%s:%d): sp=%p pc=%08lx pr=%08lx\n", @@ -470,11 +472,14 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, struct fdpic_func_descriptor __user *funcptr = (struct fdpic_func_descriptor __user *)ka->sa.sa_handler; - __get_user(regs->pc, &funcptr->text); - __get_user(regs->regs[12], &funcptr->GOT); + err |= __get_user(regs->pc, &funcptr->text); + err |= __get_user(regs->regs[12], &funcptr->GOT); } else regs->pc = (unsigned long)ka->sa.sa_handler; + if (err) + goto give_sigsegv; + set_fs(USER_DS); pr_debug("SIG deliver (%s:%d): sp=%p pc=%08lx pr=%08lx\n", |