[U-Boot] [PATCH v3 12/28] riscv: treat undefined exception codes as reserved
Lukas Auer
lukas.auer at aisec.fraunhofer.de
Fri Nov 9 12:59:07 UTC 2018
Undefined exception codes currently lead to an out-of-bounds array
access. Prevent this by treating undefined exception codes as
"reserved".
Signed-off-by: Lukas Auer <lukas.auer at aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
Reviewed-by: Rick Chen <rick at andestech.com>
---
Changes in v3: None
Changes in v2: None
arch/riscv/lib/interrupts.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/riscv/lib/interrupts.c b/arch/riscv/lib/interrupts.c
index 6a12818c2b..d0d8de500e 100644
--- a/arch/riscv/lib/interrupts.c
+++ b/arch/riscv/lib/interrupts.c
@@ -81,6 +81,10 @@ static void _exit_trap(ulong code, ulong epc, struct pt_regs *regs)
"Store/AMO page fault",
};
- printf("exception code: %ld , %s , epc %lx , ra %lx\n",
- code, exception_code[code], epc, regs->ra);
+ if (code < ARRAY_SIZE(exception_code)) {
+ printf("exception code: %ld , %s , epc %lx , ra %lx\n",
+ code, exception_code[code], epc, regs->ra);
+ } else {
+ printf("Reserved\n");
+ }
}
--
2.17.2
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