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authorOleg Nesterov <oleg@tv-sign.ru>2007-07-17 14:37:54 -0700
committerDavid S. Miller <davem@davemloft.net>2007-07-17 14:37:54 -0700
commit62715ec832c7229b677415901e98799124efb023 (patch)
tree29c3699ba537e65074c72e7f3ca20f960766a109 /arch/sparc64/kernel/signal.c
parentc1e49e3a1b37e5fbeb6923d4a950ec1fea8388fa (diff)
[SPARC64]: Kill bogus set_fs(KERNEL_DS) in do_rt_sigreturn().
From: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/kernel/signal.c')
-rw-r--r--arch/sparc64/kernel/signal.c15
1 files changed, 3 insertions, 12 deletions
diff --git a/arch/sparc64/kernel/signal.c b/arch/sparc64/kernel/signal.c
index 203e8730100..fb13775b368 100644
--- a/arch/sparc64/kernel/signal.c
+++ b/arch/sparc64/kernel/signal.c
@@ -289,9 +289,7 @@ void do_rt_sigreturn(struct pt_regs *regs)
struct rt_signal_frame __user *sf;
unsigned long tpc, tnpc, tstate;
__siginfo_fpu_t __user *fpu_save;
- mm_segment_t old_fs;
sigset_t set;
- stack_t st;
int err;
/* Always make any pending restarted system calls return -EINTR */
@@ -327,20 +325,13 @@ void do_rt_sigreturn(struct pt_regs *regs)
err |= restore_fpu_state(regs, &sf->fpu_state);
err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t));
- err |= __copy_from_user(&st, &sf->stack, sizeof(stack_t));
-
+ err |= do_sigaltstack(&sf->stack, NULL, (unsigned long)sf);
+
if (err)
goto segv;
-
+
regs->tpc = tpc;
regs->tnpc = tnpc;
-
- /* It is more difficult to avoid calling this function than to
- call it and ignore errors. */
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- do_sigaltstack((const stack_t __user *) &st, NULL, (unsigned long)sf);
- set_fs(old_fs);
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);