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author | David S. Miller <davem@davemloft.net> | 2010-09-21 22:30:13 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2010-09-21 22:30:13 -0700 |
commit | c27852597829128a9c9d96d79ec454a83c6b0da5 (patch) | |
tree | 3fe8d2b5cd9d59a47c64491ba2398bc2039d339c /arch/sparc/kernel/signal_32.c | |
parent | 392c21802ee3aa85cee0e703105f797a8a7b9416 (diff) | |
download | kernel_samsung_crespo-c27852597829128a9c9d96d79ec454a83c6b0da5.zip kernel_samsung_crespo-c27852597829128a9c9d96d79ec454a83c6b0da5.tar.gz kernel_samsung_crespo-c27852597829128a9c9d96d79ec454a83c6b0da5.tar.bz2 |
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_32.c')
-rw-r--r-- | arch/sparc/kernel/signal_32.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/sparc/kernel/signal_32.c b/arch/sparc/kernel/signal_32.c index 99c85e9..5e5c5fd 100644 --- a/arch/sparc/kernel/signal_32.c +++ b/arch/sparc/kernel/signal_32.c @@ -580,12 +580,14 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0) regs->u_regs[UREG_I0] = orig_i0; regs->pc -= 4; regs->npc -= 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->pc -= 4; regs->npc -= 4; + pt_regs_clear_syscall(regs); } /* if there's no signal to deliver, we just put the saved sigmask |