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Fix CVE-2019-11815: strict BPF register state propagation in verifier #113

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Fix CVE-2019-11815: strict BPF register state propagation in verifier #113

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12 changes: 9 additions & 3 deletions arch/arm64/kernel/traps.c
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Original file line number Diff line number Diff line change
Expand Up @@ -507,14 +507,20 @@ const char *esr_get_class_string(u32 esr)
*/
asmlinkage void bad_mode(struct pt_regs *regs, int reason, unsigned int esr)
{
siginfo_t info;
void __user *pc = (void __user *)instruction_pointer(regs);
console_verbose();

pr_crit("Bad mode in %s handler detected, code 0x%08x -- %s\n",
handler[reason], esr, esr_get_class_string(esr));
__show_regs(regs);

die("Oops - bad mode", regs, 0);
local_irq_disable();
panic("bad mode");
info.si_signo = SIGILL;
info.si_errno = 0;
info.si_code = ILL_ILLOPC;
info.si_addr = pc;

arm64_notify_die("Oops - bad mode", regs, &info, 0);
}

/*
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