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arm64: Do not report user faults for handled signals

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Currently user faults (page, undefined instruction) are always reported
even though the user may have a signal handler for them. This patch adds
unhandled_signal() check together with printk_ratelimit() for these
cases.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Catalin Marinas
2013-05-21 12:16:56 +01:00
parent 726dcaa158
commit 953dbbed9e
2 changed files with 5 additions and 3 deletions
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5
arch/arm64/kernel/traps.c
View File

@@ -267,7 +267,8 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs)
return; return;
#endif #endif
if (show_unhandled_signals) { if (show_unhandled_signals && unhandled_signal(current, SIGILL) &&
printk_ratelimit()) {
pr_info("%s[%d]: undefined instruction: pc=%p\n", pr_info("%s[%d]: undefined instruction: pc=%p\n",
current->comm, task_pid_nr(current), pc); current->comm, task_pid_nr(current), pc);
dump_instr(KERN_INFO, regs); dump_instr(KERN_INFO, regs);
@@ -294,7 +295,7 @@ asmlinkage long do_ni_syscall(struct pt_regs *regs)
} }
#endif #endif
if (show_unhandled_signals) { if (show_unhandled_signals && printk_ratelimit()) {
pr_info("%s[%d]: syscall %d\n", current->comm, pr_info("%s[%d]: syscall %d\n", current->comm,
task_pid_nr(current), (int)regs->syscallno); task_pid_nr(current), (int)regs->syscallno);
dump_instr("", regs); dump_instr("", regs);

3
arch/arm64/mm/fault.c
View File

@@ -113,7 +113,8 @@ static void __do_user_fault(struct task_struct *tsk, unsigned long addr,
{ {
struct siginfo si; struct siginfo si;
if (show_unhandled_signals) { if (show_unhandled_signals && unhandled_signal(tsk, sig) &&
printk_ratelimit()) {
pr_info("%s[%d]: unhandled %s (%d) at 0x%08lx, esr 0x%03x\n", pr_info("%s[%d]: unhandled %s (%d) at 0x%08lx, esr 0x%03x\n",
tsk->comm, task_pid_nr(tsk), fault_name(esr), sig, tsk->comm, task_pid_nr(tsk), fault_name(esr), sig,
addr, esr); addr, esr);