From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
Marcin Nowakowski <marcin.nowakowski@imgtec.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Meyer <thomas@m3y3r.de>, Ingo Molnar <mingo@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: [PATCH 3.18 15/28] kernel/extable.c: mark core_kernel_text notrace
Date: Wed, 19 Jul 2017 13:15:43 +0200 [thread overview]
Message-ID: <20170719111320.331841940@linuxfoundation.org> (raw)
In-Reply-To: <20170719111319.044769907@linuxfoundation.org>
3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
commit c0d80ddab89916273cb97114889d3f337bc370ae upstream.
core_kernel_text is used by MIPS in its function graph trace processing,
so having this method traced leads to an infinite set of recursive calls
such as:
Call Trace:
ftrace_return_to_handler+0x50/0x128
core_kernel_text+0x10/0x1b8
prepare_ftrace_return+0x6c/0x114
ftrace_graph_caller+0x20/0x44
return_to_handler+0x10/0x30
return_to_handler+0x0/0x30
return_to_handler+0x0/0x30
ftrace_ops_no_ops+0x114/0x1bc
core_kernel_text+0x10/0x1b8
core_kernel_text+0x10/0x1b8
core_kernel_text+0x10/0x1b8
ftrace_ops_no_ops+0x114/0x1bc
core_kernel_text+0x10/0x1b8
prepare_ftrace_return+0x6c/0x114
ftrace_graph_caller+0x20/0x44
(...)
Mark the function notrace to avoid it being traced.
Link: http://lkml.kernel.org/r/1498028607-6765-1-git-send-email-marcin.nowakowski@imgtec.com
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Meyer <thomas@m3y3r.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/extable.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/extable.c
+++ b/kernel/extable.c
@@ -66,7 +66,7 @@ static inline int init_kernel_text(unsig
return 0;
}
-int core_kernel_text(unsigned long addr)
+int notrace core_kernel_text(unsigned long addr)
{
if (addr >= (unsigned long)_stext &&
addr < (unsigned long)_etext)
next prev parent reply other threads:[~2017-07-19 11:16 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-19 11:15 [PATCH 3.18 00/28] 3.18.62-stable review Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 01/28] ipv6: avoid unregistering inet6_dev for loopback Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 02/28] tcp: reset sk_rx_dst in tcp_disconnect() Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 03/28] net: prevent sign extension in dev_get_stats() Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 04/28] ipv6: dad: dont remove dynamic addresses if link is down Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 06/28] cfg80211: Define nla_policy for NL80211_ATTR_LOCAL_MESH_POWER_MODE Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 07/28] cfg80211: Validate frequencies nested in NL80211_ATTR_SCAN_FREQUENCIES Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 08/28] cfg80211: Check if PMKID attribute is of expected size Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 09/28] irqchip/gic-v3: Fix out-of-bound access in gic_set_affinity Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 10/28] parisc: Report SIGSEGV instead of SIGBUS when running out of stack Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 11/28] parisc: use compat_sys_keyctl() Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 12/28] parisc: DMA API: return error instead of BUG_ON for dma ops on non dma devs Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 13/28] parisc/mm: Ensure IRQs are off in switch_mm() Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 14/28] tools/lib/lockdep: Reduce MAX_LOCK_DEPTH to avoid overflowing lock_chain/: Depth Greg Kroah-Hartman
2017-07-19 11:15 ` Greg Kroah-Hartman [this message]
2017-07-19 11:15 ` [PATCH 3.18 16/28] fs/dcache.c: fix spin lockup issue on nlru->lock Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 17/28] checkpatch: silence perl 5.26.0 unescaped left brace warnings Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 18/28] exec: Limit arg stack to at most 75% of _STK_LIM Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 19/28] vt: fix unchecked __put_user() in tioclinux ioctls Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 22/28] crypto: atmel - only treat EBUSY as transient if backlog Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 23/28] crypto: sha1-ssse3 - Disable avx2 Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 25/28] sched/topology: Optimize build_group_mask() Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 26/28] sched/topology: Fix overlapping sched_group_mask Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 27/28] PM / QoS: return -EINVAL for bogus strings Greg Kroah-Hartman
2017-07-19 11:15 ` [PATCH 3.18 28/28] tracing: Use SOFTIRQ_OFFSET for softirq dectection for more accurate results Greg Kroah-Hartman
2017-07-19 20:31 ` [PATCH 3.18 00/28] 3.18.62-stable review Guenter Roeck
2017-07-19 23:40 ` Shuah Khan
2017-07-20 5:07 ` Greg Kroah-Hartman
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