Messages in this thread Patch in this message | | | From | Matt Fleming <> | Subject | [PATCH 03/41] avr32: Don't mask signals in the error path | Date | Thu, 11 Aug 2011 14:56:37 +0100 |
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From: Matt Fleming <matt.fleming@linux.intel.com>
The current handle_signal() implementation is broken - it will mask signals if we fail to setup the signal stack frame, which isn't the desired behaviour, we should only be masking signals if we succeed in setting up the stack frame. It looks like this code was copied from the old (broken) arm implementation but wasn't updated when the arm code was fixed in commit a6c61e9dfdd0 ("[ARM] 3168/1: Update ARM signal delivery and masking").
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Signed-off-by: Matt Fleming <matt.fleming@linux.intel.com> --- arch/avr32/kernel/signal.c | 25 ++++++++++++------------- 1 files changed, 12 insertions(+), 13 deletions(-)
diff --git a/arch/avr32/kernel/signal.c b/arch/avr32/kernel/signal.c index 64f886f..9c075e1 100644 --- a/arch/avr32/kernel/signal.c +++ b/arch/avr32/kernel/signal.c @@ -238,22 +238,21 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info, */ ret |= !valid_user_regs(regs); + if (ret != 0) { + force_sigsegv(sig, current); + return; + } + /* - * Block the signal if we were unsuccessful. + * Block the signal if we were successful. */ - if (ret != 0 || !(ka->sa.sa_flags & SA_NODEFER)) { - spin_lock_irq(¤t->sighand->siglock); - sigorsets(¤t->blocked, ¤t->blocked, - &ka->sa.sa_mask); + spin_lock_irq(¤t->sighand->siglock); + sigorsets(¤t->blocked, ¤t->blocked, + &ka->sa.sa_mask); + if (!(ka->sa.sa_flags & SA_NODEFER)) sigaddset(¤t->blocked, sig); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - } - - if (ret == 0) - return; - - force_sigsegv(sig, current); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); } /* -- 1.7.4.4
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