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authorMasami Hiramatsu <mhiramat@kernel.org>2018-04-28 21:36:33 +0900
committerIngo Molnar <mingo@kernel.org>2018-06-21 17:33:42 +0200
commit4458515b2c52831ee622411d2fe3e774d1f5c49a (patch)
treea28c8ea97bb9e2b985c7beb36ed604b42169b636 /kernel/kprobes.c
parent81365a947de453bcaba2558f8de5dadcffe05bc1 (diff)
downloadlinux-4458515b2c52831ee622411d2fe3e774d1f5c49a.tar.bz2
kprobes: Replace %p with other pointer types
Replace %p with %pS or just remove it if unneeded. And use WARN_ONCE() if it is a single bug. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: David Howells <dhowells@redhat.com> Cc: David S . Miller <davem@davemloft.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Jon Medhurst <tixy@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Thomas Richter <tmricht@linux.ibm.com> Cc: Tobin C . Harding <me@tobin.cc> Cc: Will Deacon <will.deacon@arm.com> Cc: acme@kernel.org Cc: akpm@linux-foundation.org Cc: brueckner@linux.vnet.ibm.com Cc: linux-arch@vger.kernel.org Cc: rostedt@goodmis.org Cc: schwidefsky@de.ibm.com Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/lkml/152491899284.9916.5350534544808158621.stgit@devbox Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/kprobes.c')
-rw-r--r--kernel/kprobes.c22
1 files changed, 10 insertions, 12 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 1d6130d2937a..ab257be4d924 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -710,9 +710,7 @@ static void reuse_unused_kprobe(struct kprobe *ap)
* there is still a relative jump) and disabled.
*/
op = container_of(ap, struct optimized_kprobe, kp);
- if (unlikely(list_empty(&op->list)))
- printk(KERN_WARNING "Warning: found a stray unused "
- "aggrprobe@%p\n", ap->addr);
+ WARN_ON_ONCE(list_empty(&op->list));
/* Enable the probe again */
ap->flags &= ~KPROBE_FLAG_DISABLED;
/* Optimize it again (remove from op->list) */
@@ -985,7 +983,8 @@ static int arm_kprobe_ftrace(struct kprobe *p)
ret = ftrace_set_filter_ip(&kprobe_ftrace_ops,
(unsigned long)p->addr, 0, 0);
if (ret) {
- pr_debug("Failed to arm kprobe-ftrace at %p (%d)\n", p->addr, ret);
+ pr_debug("Failed to arm kprobe-ftrace at %pS (%d)\n",
+ p->addr, ret);
return ret;
}
@@ -1025,7 +1024,8 @@ static int disarm_kprobe_ftrace(struct kprobe *p)
ret = ftrace_set_filter_ip(&kprobe_ftrace_ops,
(unsigned long)p->addr, 1, 0);
- WARN(ret < 0, "Failed to disarm kprobe-ftrace at %p (%d)\n", p->addr, ret);
+ WARN_ONCE(ret < 0, "Failed to disarm kprobe-ftrace at %pS (%d)\n",
+ p->addr, ret);
return ret;
}
#else /* !CONFIG_KPROBES_ON_FTRACE */
@@ -2069,11 +2069,12 @@ out:
}
EXPORT_SYMBOL_GPL(enable_kprobe);
+/* Caller must NOT call this in usual path. This is only for critical case */
void dump_kprobe(struct kprobe *kp)
{
- printk(KERN_WARNING "Dumping kprobe:\n");
- printk(KERN_WARNING "Name: %s\nAddress: %p\nOffset: %x\n",
- kp->symbol_name, kp->addr, kp->offset);
+ pr_err("Dumping kprobe:\n");
+ pr_err("Name: %s\nOffset: %x\nAddress: %pS\n",
+ kp->symbol_name, kp->offset, kp->addr);
}
NOKPROBE_SYMBOL(dump_kprobe);
@@ -2096,11 +2097,8 @@ static int __init populate_kprobe_blacklist(unsigned long *start,
entry = arch_deref_entry_point((void *)*iter);
if (!kernel_text_address(entry) ||
- !kallsyms_lookup_size_offset(entry, &size, &offset)) {
- pr_err("Failed to find blacklist at %p\n",
- (void *)entry);
+ !kallsyms_lookup_size_offset(entry, &size, &offset))
continue;
- }
ent = kmalloc(sizeof(*ent), GFP_KERNEL);
if (!ent)