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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2007-07-18 01:37:54 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2007-07-18 01:37:54 +0400 |
| commit | 62715ec832c7229b677415901e98799124efb023 (patch) | |
| tree | 29c3699ba537e65074c72e7f3ca20f960766a109 /arch/sparc64 | |
| parent | c1e49e3a1b37e5fbeb6923d4a950ec1fea8388fa (diff) | |
| download | linux-62715ec832c7229b677415901e98799124efb023.tar.xz | |
[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')
| -rw-r--r-- | arch/sparc64/kernel/signal.c | 15 |
1 files changed, 3 insertions, 12 deletions
diff --git a/arch/sparc64/kernel/signal.c b/arch/sparc64/kernel/signal.c index 203e87301005..fb13775b3682 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(¤t->sighand->siglock); |