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Diffstat (limited to 'arch/arm64/mm/fault.c')
-rw-r--r--arch/arm64/mm/fault.c131
1 files changed, 74 insertions, 57 deletions
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 9b7f89df49db..ce441d29e7f6 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -596,7 +596,7 @@ static int do_sea(unsigned long addr, unsigned int esr, struct pt_regs *regs)
info.si_signo = SIGBUS;
info.si_errno = 0;
- info.si_code = 0;
+ info.si_code = BUS_FIXME;
if (esr & ESR_ELx_FnV)
info.si_addr = NULL;
else
@@ -607,70 +607,70 @@ static int do_sea(unsigned long addr, unsigned int esr, struct pt_regs *regs)
}
static const struct fault_info fault_info[] = {
- { do_bad, SIGBUS, 0, "ttbr address size fault" },
- { do_bad, SIGBUS, 0, "level 1 address size fault" },
- { do_bad, SIGBUS, 0, "level 2 address size fault" },
- { do_bad, SIGBUS, 0, "level 3 address size fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "ttbr address size fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "level 1 address size fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "level 2 address size fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "level 3 address size fault" },
{ do_translation_fault, SIGSEGV, SEGV_MAPERR, "level 0 translation fault" },
{ do_translation_fault, SIGSEGV, SEGV_MAPERR, "level 1 translation fault" },
{ do_translation_fault, SIGSEGV, SEGV_MAPERR, "level 2 translation fault" },
{ do_translation_fault, SIGSEGV, SEGV_MAPERR, "level 3 translation fault" },
- { do_bad, SIGBUS, 0, "unknown 8" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 8" },
{ do_page_fault, SIGSEGV, SEGV_ACCERR, "level 1 access flag fault" },
{ do_page_fault, SIGSEGV, SEGV_ACCERR, "level 2 access flag fault" },
{ do_page_fault, SIGSEGV, SEGV_ACCERR, "level 3 access flag fault" },
- { do_bad, SIGBUS, 0, "unknown 12" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 12" },
{ do_page_fault, SIGSEGV, SEGV_ACCERR, "level 1 permission fault" },
{ do_page_fault, SIGSEGV, SEGV_ACCERR, "level 2 permission fault" },
{ do_page_fault, SIGSEGV, SEGV_ACCERR, "level 3 permission fault" },
- { do_sea, SIGBUS, 0, "synchronous external abort" },
- { do_bad, SIGBUS, 0, "unknown 17" },
- { do_bad, SIGBUS, 0, "unknown 18" },
- { do_bad, SIGBUS, 0, "unknown 19" },
- { do_sea, SIGBUS, 0, "level 0 (translation table walk)" },
- { do_sea, SIGBUS, 0, "level 1 (translation table walk)" },
- { do_sea, SIGBUS, 0, "level 2 (translation table walk)" },
- { do_sea, SIGBUS, 0, "level 3 (translation table walk)" },
- { do_sea, SIGBUS, 0, "synchronous parity or ECC error" }, // Reserved when RAS is implemented
- { do_bad, SIGBUS, 0, "unknown 25" },
- { do_bad, SIGBUS, 0, "unknown 26" },
- { do_bad, SIGBUS, 0, "unknown 27" },
- { do_sea, SIGBUS, 0, "level 0 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
- { do_sea, SIGBUS, 0, "level 1 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
- { do_sea, SIGBUS, 0, "level 2 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
- { do_sea, SIGBUS, 0, "level 3 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
- { do_bad, SIGBUS, 0, "unknown 32" },
+ { do_sea, SIGBUS, BUS_FIXME, "synchronous external abort" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 17" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 18" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 19" },
+ { do_sea, SIGBUS, BUS_FIXME, "level 0 (translation table walk)" },
+ { do_sea, SIGBUS, BUS_FIXME, "level 1 (translation table walk)" },
+ { do_sea, SIGBUS, BUS_FIXME, "level 2 (translation table walk)" },
+ { do_sea, SIGBUS, BUS_FIXME, "level 3 (translation table walk)" },
+ { do_sea, SIGBUS, BUS_FIXME, "synchronous parity or ECC error" }, // Reserved when RAS is implemented
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 25" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 26" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 27" },
+ { do_sea, SIGBUS, BUS_FIXME, "level 0 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
+ { do_sea, SIGBUS, BUS_FIXME, "level 1 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
+ { do_sea, SIGBUS, BUS_FIXME, "level 2 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
+ { do_sea, SIGBUS, BUS_FIXME, "level 3 synchronous parity error (translation table walk)" }, // Reserved when RAS is implemented
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 32" },
{ do_alignment_fault, SIGBUS, BUS_ADRALN, "alignment fault" },
- { do_bad, SIGBUS, 0, "unknown 34" },
- { do_bad, SIGBUS, 0, "unknown 35" },
- { do_bad, SIGBUS, 0, "unknown 36" },
- { do_bad, SIGBUS, 0, "unknown 37" },
- { do_bad, SIGBUS, 0, "unknown 38" },
- { do_bad, SIGBUS, 0, "unknown 39" },
- { do_bad, SIGBUS, 0, "unknown 40" },
- { do_bad, SIGBUS, 0, "unknown 41" },
- { do_bad, SIGBUS, 0, "unknown 42" },
- { do_bad, SIGBUS, 0, "unknown 43" },
- { do_bad, SIGBUS, 0, "unknown 44" },
- { do_bad, SIGBUS, 0, "unknown 45" },
- { do_bad, SIGBUS, 0, "unknown 46" },
- { do_bad, SIGBUS, 0, "unknown 47" },
- { do_bad, SIGBUS, 0, "TLB conflict abort" },
- { do_bad, SIGBUS, 0, "Unsupported atomic hardware update fault" },
- { do_bad, SIGBUS, 0, "unknown 50" },
- { do_bad, SIGBUS, 0, "unknown 51" },
- { do_bad, SIGBUS, 0, "implementation fault (lockdown abort)" },
- { do_bad, SIGBUS, 0, "implementation fault (unsupported exclusive)" },
- { do_bad, SIGBUS, 0, "unknown 54" },
- { do_bad, SIGBUS, 0, "unknown 55" },
- { do_bad, SIGBUS, 0, "unknown 56" },
- { do_bad, SIGBUS, 0, "unknown 57" },
- { do_bad, SIGBUS, 0, "unknown 58" },
- { do_bad, SIGBUS, 0, "unknown 59" },
- { do_bad, SIGBUS, 0, "unknown 60" },
- { do_bad, SIGBUS, 0, "section domain fault" },
- { do_bad, SIGBUS, 0, "page domain fault" },
- { do_bad, SIGBUS, 0, "unknown 63" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 34" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 35" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 36" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 37" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 38" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 39" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 40" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 41" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 42" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 43" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 44" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 45" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 46" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 47" },
+ { do_bad, SIGBUS, BUS_FIXME, "TLB conflict abort" },
+ { do_bad, SIGBUS, BUS_FIXME, "Unsupported atomic hardware update fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 50" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 51" },
+ { do_bad, SIGBUS, BUS_FIXME, "implementation fault (lockdown abort)" },
+ { do_bad, SIGBUS, BUS_FIXME, "implementation fault (unsupported exclusive)" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 54" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 55" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 56" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 57" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 58" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 59" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 60" },
+ { do_bad, SIGBUS, BUS_FIXME, "section domain fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "page domain fault" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 63" },
};
int handle_guest_sea(phys_addr_t addr, unsigned int esr)
@@ -707,6 +707,23 @@ asmlinkage void __exception do_mem_abort(unsigned long addr, unsigned int esr,
arm64_notify_die("", regs, &info, esr);
}
+asmlinkage void __exception do_el0_ia_bp_hardening(unsigned long addr,
+ unsigned int esr,
+ struct pt_regs *regs)
+{
+ /*
+ * We've taken an instruction abort from userspace and not yet
+ * re-enabled IRQs. If the address is a kernel address, apply
+ * BP hardening prior to enabling IRQs and pre-emption.
+ */
+ if (addr > TASK_SIZE)
+ arm64_apply_bp_hardening();
+
+ local_irq_enable();
+ do_mem_abort(addr, esr, regs);
+}
+
+
asmlinkage void __exception do_sp_pc_abort(unsigned long addr,
unsigned int esr,
struct pt_regs *regs)
@@ -739,11 +756,11 @@ static struct fault_info __refdata debug_fault_info[] = {
{ do_bad, SIGTRAP, TRAP_HWBKPT, "hardware breakpoint" },
{ do_bad, SIGTRAP, TRAP_HWBKPT, "hardware single-step" },
{ do_bad, SIGTRAP, TRAP_HWBKPT, "hardware watchpoint" },
- { do_bad, SIGBUS, 0, "unknown 3" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 3" },
{ do_bad, SIGTRAP, TRAP_BRKPT, "aarch32 BKPT" },
- { do_bad, SIGTRAP, 0, "aarch32 vector catch" },
+ { do_bad, SIGTRAP, TRAP_FIXME, "aarch32 vector catch" },
{ early_brk64, SIGTRAP, TRAP_BRKPT, "aarch64 BRK" },
- { do_bad, SIGBUS, 0, "unknown 7" },
+ { do_bad, SIGBUS, BUS_FIXME, "unknown 7" },
};
void __init hook_debug_fault_code(int nr,
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