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authorAl Viro <viro@zeniv.linux.org.uk>2010-09-24 09:23:57 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-09-25 00:54:19 +0400
commita05c4e1d669d09faa90ce7b22646ad1a4b0de3ff (patch)
treedfb850a66b18d48610aedaed78d2e8003106a852 /arch
parenta748102430f4dbbfca3ff81ac12db6e4f1243677 (diff)
downloadlinux-a05c4e1d669d09faa90ce7b22646ad1a4b0de3ff.tar.xz
m32r: don't block signals if sigframe setup has failed
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/m32r/kernel/signal.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/arch/m32r/kernel/signal.c b/arch/m32r/kernel/signal.c
index db152263484f..a56fcbd8abe6 100644
--- a/arch/m32r/kernel/signal.c
+++ b/arch/m32r/kernel/signal.c
@@ -187,7 +187,7 @@ get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
return (void __user *)((sp - frame_size) & -8ul);
}
-static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
{
struct rt_sigframe __user *frame;
@@ -244,17 +244,18 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
current->comm, current->pid, frame, regs->pc);
#endif
- return;
+ return 0;
give_sigsegv:
force_sigsegv(sig, current);
+ return -EFAULT;
}
/*
* OK, we're invoking a handler
*/
-static void
+static int
handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *oldset, struct pt_regs *regs)
{
@@ -287,7 +288,8 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
}
/* Set up the stack frame */
- setup_rt_frame(sig, ka, info, oldset, regs);
+ if (setup_rt_frame(sig, ka, info, oldset, regs))
+ return -EFAULT;
spin_lock_irq(&current->sighand->siglock);
sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
@@ -295,6 +297,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
sigaddset(&current->blocked,sig);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
+ return 0;
}
/*
@@ -302,7 +305,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
* want to handle. Thus you cannot kill init even with a SIGKILL even by
* mistake.
*/
-static int do_signal(struct pt_regs *regs)
+static void do_signal(struct pt_regs *regs)
{
siginfo_t info;
int signr;
@@ -317,7 +320,7 @@ static int do_signal(struct pt_regs *regs)
* if so.
*/
if (!user_mode(regs))
- return 1;
+ return;
if (try_to_freeze())
goto no_signal;
@@ -336,9 +339,10 @@ static int do_signal(struct pt_regs *regs)
*/
/* Whee! Actually deliver the signal. */
- handle_signal(signr, &ka, &info, oldset, regs);
- clear_thread_flag(TIF_RESTORE_SIGMASK);
- return 1;
+ if (handle_signal(signr, &ka, &info, oldset, regs) == 0)
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+
+ return;
}
no_signal:
@@ -370,7 +374,6 @@ static int do_signal(struct pt_regs *regs)
clear_thread_flag(TIF_RESTORE_SIGMASK);
sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
}
- return 0;
}
/*