diff options
Diffstat (limited to 'kernel/trace/trace_kprobe.c')
| -rw-r--r-- | kernel/trace/trace_kprobe.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index deeb03ae21e1..2e13f77b9a37 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -88,6 +88,7 @@ static nokprobe_inline unsigned long trace_kprobe_nhit(struct trace_kprobe *tk) return nhit; } +/* Return 0 if it fails to find the symbol address */ static nokprobe_inline unsigned long trace_kprobe_address(struct trace_kprobe *tk) { @@ -96,7 +97,8 @@ unsigned long trace_kprobe_address(struct trace_kprobe *tk) if (tk->symbol) { addr = (unsigned long) kallsyms_lookup_name(trace_kprobe_symbol(tk)); - addr += tk->rp.kp.offset; + if (addr) + addr += tk->rp.kp.offset; } else { addr = (unsigned long)tk->rp.kp.addr; } @@ -519,8 +521,8 @@ static bool within_notrace_func(struct trace_kprobe *tk) unsigned long offset, size, addr; addr = trace_kprobe_address(tk); - if (!kallsyms_lookup_size_offset(addr, &size, &offset)) - return true; /* Out of range. */ + if (!addr || !kallsyms_lookup_size_offset(addr, &size, &offset)) + return false; return !ftrace_location_range(addr - offset, addr - offset + size); } |