arm64: signal: Make force_signal_inject more robust
force_signal_inject is a little flakey:
* It only knows about SIGILL and SIGSEGV, so can potentially deliver
other signals based on a partially initialised siginfo_t
* It sets si_addr to point at the PC for SIGSEGV
* It always operates on current, so doesn't need the regs argument
This patch fixes these issues by always assigning the si_addr field to
the address parameter of the function and updates the callers (including
those that indirectly call via arm64_notify_segfault) accordingly.
Signed-off-by: Will Deacon <will.deacon@arm.com>
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index e7226c4..6964ff8 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -285,8 +285,7 @@ static void task_fpsimd_save(void)
* re-enter user with corrupt state.
* There's no way to recover, so kill it:
*/
- force_signal_inject(
- SIGKILL, 0, current_pt_regs(), 0);
+ force_signal_inject(SIGKILL, 0, 0);
return;
}
@@ -831,7 +830,7 @@ asmlinkage void do_sve_acc(unsigned int esr, struct pt_regs *regs)
{
/* Even if we chose not to use SVE, the hardware could still trap: */
if (unlikely(!system_supports_sve()) || WARN_ON(is_compat_task())) {
- force_signal_inject(SIGILL, ILL_ILLOPC, regs, 0);
+ force_signal_inject(SIGILL, ILL_ILLOPC, regs->pc);
return;
}