diff options
| -rw-r--r-- | arch/mips/kernel/process.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c index e7b0b385fb2..b160ea30de0 100644 --- a/arch/mips/kernel/process.c +++ b/arch/mips/kernel/process.c @@ -311,12 +311,19 @@ static inline int is_sp_move_ins(union mips_instruction *ip) static int get_frame_info(struct mips_frame_info *info) { union mips_instruction *ip = info->func; - int i, max_insns = - min(128UL, info->func_size / sizeof(union mips_instruction)); + unsigned max_insns = info->func_size / sizeof(union mips_instruction); + unsigned i; info->pc_offset = -1; info->frame_size = 0; + if (!ip) + goto err; + + if (max_insns == 0) + max_insns = 128U; /* unknown function size */ + max_insns = min(128U, max_insns); + for (i = 0; i < max_insns; i++, ip++) { if (is_jal_jalr_jr_ins(ip)) @@ -337,6 +344,7 @@ static int get_frame_info(struct mips_frame_info *info) if (info->pc_offset < 0) /* leaf */ return 1; /* prologue seems boggus... */ +err: return -1; } |