diff options
Diffstat (limited to 'kernel/kprobes.c')
| -rw-r--r-- | kernel/kprobes.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c index f4ddfdd2d07e..b1ea30a5540e 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -709,7 +709,6 @@ static void unoptimize_kprobe(struct kprobe *p, bool force) static int reuse_unused_kprobe(struct kprobe *ap) { struct optimized_kprobe *op; - int ret; /* * Unused kprobe MUST be on the way of delayed unoptimizing (means @@ -720,9 +719,8 @@ static int reuse_unused_kprobe(struct kprobe *ap) /* Enable the probe again */ ap->flags &= ~KPROBE_FLAG_DISABLED; /* Optimize it again (remove from op->list) */ - ret = kprobe_optready(ap); - if (ret) - return ret; + if (!kprobe_optready(ap)) + return -EINVAL; optimize_kprobe(ap); return 0; @@ -1396,7 +1394,7 @@ bool __weak arch_within_kprobe_blacklist(unsigned long addr) addr < (unsigned long)__kprobes_text_end; } -bool within_kprobe_blacklist(unsigned long addr) +static bool __within_kprobe_blacklist(unsigned long addr) { struct kprobe_blacklist_entry *ent; @@ -1410,7 +1408,26 @@ bool within_kprobe_blacklist(unsigned long addr) if (addr >= ent->start_addr && addr < ent->end_addr) return true; } + return false; +} +bool within_kprobe_blacklist(unsigned long addr) +{ + char symname[KSYM_NAME_LEN], *p; + + if (__within_kprobe_blacklist(addr)) + return true; + + /* Check if the address is on a suffixed-symbol */ + if (!lookup_symbol_name(addr, symname)) { + p = strchr(symname, '.'); + if (!p) + return false; + *p = '\0'; + addr = (unsigned long)kprobe_lookup_name(symname, 0); + if (addr) + return __within_kprobe_blacklist(addr); + } return false; } |