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From: Maninder Singh <maninder1.s@samsung.com>
To: keescook@chromium.org, pmladek@suse.com, bcain@quicinc.com,
	mpe@ellerman.id.au, benh@kernel.crashing.org, paulus@samba.org,
	hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com,
	borntraeger@linux.ibm.com, svens@linux.ibm.com,
	satishkh@cisco.com, sebaddel@cisco.com, kartilak@cisco.com,
	jejb@linux.ibm.com, martin.petersen@oracle.com,
	mcgrof@kernel.org, jason.wessel@windriver.com,
	daniel.thompson@linaro.org, dianders@chromium.org,
	naveen.n.rao@linux.ibm.com, anil.s.keshavamurthy@intel.com,
	davem@davemloft.net, mhiramat@kernel.org, peterz@infradead.org,
	mingo@redhat.com, will@kernel.org, longman@redhat.com,
	boqun.feng@gmail.com, rostedt@goodmis.org,
	senozhatsky@chromium.org, andriy.shevchenko@linux.intel.com,
	linux@rasmusvillemoes.dk, akpm@linux-foundation.org,
	arnd@arndb.de
Cc: linux-hexagon@vger.kernel.org, linux-kernel@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org,
	linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-modules@vger.kernel.org,
	kgdb-bugreport@lists.sourceforge.net, v.narang@samsung.com,
	onkarnath.1@samsung.com, Maninder Singh <maninder1.s@samsung.com>
Subject: [PATCH 3/5] arch:hexagon/powerpc: use KSYM_NAME_LEN as array size
Date: Fri, 20 May 2022 14:06:59 +0530	[thread overview]
Message-ID: <20220520083701.2610975-4-maninder1.s@samsung.com> (raw)
In-Reply-To: <20220520083701.2610975-1-maninder1.s@samsung.com>

kallsyms_lookup which in turn calls for kallsyms_lookup_buildid()
writes on index "KSYM_NAME_LEN - 1".

Thus array size should be KSYM_NAME_LEN.

for powerpc and hexagon it was defined as "128" directly.
and commit '61968dbc2d5d' changed define value to 512,
So both were missed to update with new size.

Fixes: 61968dbc2d5d("kallsyms: increase maximum kernel symbol length to 512")
Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
---
 arch/hexagon/kernel/traps.c | 2 +-
 arch/powerpc/xmon/xmon.c    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/hexagon/kernel/traps.c b/arch/hexagon/kernel/traps.c
index 6447763ce5a9..65b30b6ea226 100644
--- a/arch/hexagon/kernel/traps.c
+++ b/arch/hexagon/kernel/traps.c
@@ -82,7 +82,7 @@ static void do_show_stack(struct task_struct *task, unsigned long *fp,
 	const char *name = NULL;
 	unsigned long *newfp;
 	unsigned long low, high;
-	char tmpstr[128];
+	char tmpstr[KSYM_NAME_LEN];
 	char *modname;
 	int i;
 
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index afc827c65ff2..3441fc70ac92 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -91,7 +91,7 @@ static unsigned long ndump = 64;
 static unsigned long nidump = 16;
 static unsigned long ncsum = 4096;
 static int termch;
-static char tmpstr[128];
+static char tmpstr[KSYM_NAME_LEN];
 static int tracing_enabled;
 
 static long bus_error_jmp[JMP_BUF_LEN];
-- 
2.17.1


  parent reply	other threads:[~2022-05-20  8:39 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20220520083715epcas5p400b11adef4d540756c985feb20ba29bc@epcas5p4.samsung.com>
2022-05-20  8:36 ` [PATCH 0/5] kallsyms: make kallsym APIs more safe with scnprintf Maninder Singh
2022-05-20  8:36   ` [PATCH 1/5] kallsyms: pass buffer size in sprint_* APIs Maninder Singh
2022-05-20 19:52     ` Waiman Long
2022-05-22  9:43       ` Andy Shevchenko
2022-05-20  8:36   ` [PATCH 2/5] kallsyms: replace sprintf with scnprintf Maninder Singh
2022-05-20  8:36   ` Maninder Singh [this message]
2022-05-20  8:37   ` [PATCH 4/5] kallsyms: pass buffer size argument in *lookup* APIs Maninder Singh
2022-05-20  8:37   ` [PATCH 5/5] kallsyms: remove unsed API lookup_symbol_attrs Maninder Singh
2022-05-22  6:07   ` [PATCH 0/5] kallsyms: make kallsym APIs more safe with scnprintf Christoph Hellwig
2022-05-23 19:39     ` Kees Cook
2022-06-15  8:01       ` Petr Mladek

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