From: Masami Hiramatsu <mhiramat@kernel.org>
To: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Cc: Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Masami Hiramatsu <mhiramat@kernel.org>,
Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>,
"David S . Miller" <davem@davemloft.net>,
Jon Medhurst <tixy@linaro.org>, Will Deacon <will.deacon@arm.com>,
Arnd Bergmann <arnd@arndb.de>,
David Howells <dhowells@redhat.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
"Tobin C . Harding" <me@tobin.cc>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: [PATCH 4/8] kprobes/x86: Fix %p uses in error messages
Date: Thu, 25 Jan 2018 14:28:32 +0900 [thread overview]
Message-ID: <151685811228.3099.12831193108489765339.stgit@devbox> (raw)
In-Reply-To: <151685799071.3099.10383062804474021403.stgit@devbox>
Fix %p uses in error messages in kprobes/x86.
- Some %p uses are not needed. Just remove it (or remove message).
- One %p use is right before the BUG() so replaced with %px.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
arch/x86/kernel/kprobes/core.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c
index bd36f3c33cd0..aea956aedad7 100644
--- a/arch/x86/kernel/kprobes/core.c
+++ b/arch/x86/kernel/kprobes/core.c
@@ -391,8 +391,6 @@ int __copy_instruction(u8 *dest, u8 *src, u8 *real, struct insn *insn)
- (u8 *) real;
if ((s64) (s32) newdisp != newdisp) {
pr_err("Kprobes error: new displacement does not fit into s32 (%llx)\n", newdisp);
- pr_err("\tSrc: %p, Dest: %p, old disp: %x\n",
- src, real, insn->displacement.value);
return 0;
}
disp = (u8 *) dest + insn_offset_displacement(insn);
@@ -636,8 +634,7 @@ static int reenter_kprobe(struct kprobe *p, struct pt_regs *regs,
* Raise a BUG or we'll continue in an endless reentering loop
* and eventually a stack overflow.
*/
- printk(KERN_WARNING "Unrecoverable kprobe detected at %p.\n",
- p->addr);
+ pr_err("Unrecoverable kprobe detected.\n");
dump_kprobe(p);
BUG();
default:
@@ -1146,12 +1143,11 @@ int longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
(addr < (u8 *) jprobe_return_end)) {
if (stack_addr(regs) != saved_sp) {
struct pt_regs *saved_regs = &kcb->jprobe_saved_regs;
- printk(KERN_ERR
- "current sp %p does not match saved sp %p\n",
+ pr_err("current sp %px does not match saved sp %px\n",
stack_addr(regs), saved_sp);
- printk(KERN_ERR "Saved registers for jprobe %p\n", jp);
+ pr_err("Saved registers for jprobe\n");
show_regs(saved_regs);
- printk(KERN_ERR "Current registers\n");
+ pr_err("Current registers\n");
show_regs(regs);
BUG();
}
next prev parent reply other threads:[~2018-01-25 5:28 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-25 5:26 [PATCH 0/8] kprobes: Fix %p in kprobes Masami Hiramatsu
2018-01-25 5:26 ` Masami Hiramatsu
2018-01-25 5:27 ` [PATCH 1/8] kprobes: Show blacklist addresses as same as kallsyms does Masami Hiramatsu
2018-01-25 5:27 ` [PATCH 2/8] kprobes: Show address of kprobes if " Masami Hiramatsu
2018-01-25 5:28 ` [PATCH 3/8] kprobes: Replace %p with other pointer types Masami Hiramatsu
2018-01-25 5:28 ` Masami Hiramatsu [this message]
2018-01-25 5:29 ` [PATCH 5/8] kprobes/arm: Fix %p uses in error messages Masami Hiramatsu
2018-01-25 5:29 ` Masami Hiramatsu
2018-01-25 5:29 ` [PATCH 6/8] kprobes/arm64: " Masami Hiramatsu
2018-01-25 16:42 ` Will Deacon
2018-01-26 5:40 ` Masami Hiramatsu
2018-01-25 5:30 ` [PATCH 7/8] kprobes/MN10300: " Masami Hiramatsu
2018-01-25 5:30 ` [PATCH 8/8] kprobes/s390: " Masami Hiramatsu
2018-01-25 5:30 ` Masami Hiramatsu
2018-01-27 10:15 ` Heiko Carstens
2018-01-27 10:15 ` Heiko Carstens
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