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| author | David S. Miller <davem@davemloft.net> | 2010-09-21 22:30:13 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-09-21 22:30:13 -0700 |
| commit | c27852597829128a9c9d96d79ec454a83c6b0da5 (patch) | |
| tree | 3fe8d2b5cd9d59a47c64491ba2398bc2039d339c /arch/sparc/kernel/signal_64.c | |
| parent | 392c21802ee3aa85cee0e703105f797a8a7b9416 (diff) | |
| download | lwn-c27852597829128a9c9d96d79ec454a83c6b0da5.tar.gz lwn-c27852597829128a9c9d96d79ec454a83c6b0da5.zip | |
sparc: Prevent no-handler signal syscall restart recursion.
Explicitly clear the "in-syscall" bit when we have no signal
handler and back up the program counters to back up the system
call.
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/signal_64.c')
| -rw-r--r-- | arch/sparc/kernel/signal_64.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/sparc/kernel/signal_64.c b/arch/sparc/kernel/signal_64.c index 3f19e673e2cd..006fe4515886 100644 --- a/arch/sparc/kernel/signal_64.c +++ b/arch/sparc/kernel/signal_64.c @@ -600,12 +600,14 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0) regs->u_regs[UREG_I0] = orig_i0; regs->tpc -= 4; regs->tnpc -= 4; + pt_regs_clear_syscall(regs); } if (restart_syscall && regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) { regs->u_regs[UREG_G1] = __NR_restart_syscall; regs->tpc -= 4; regs->tnpc -= 4; + pt_regs_clear_syscall(regs); } /* If there's no signal to deliver, we just put the saved sigmask |