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Message-ID: <20210930071143.63410-3-wangkefeng.wang@huawei.com>
Date: Thu, 30 Sep 2021 15:11:34 +0800
From: Kefeng Wang <wangkefeng.wang@...wei.com>
To: <arnd@...db.de>, <linux-arch@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>,
<rostedt@...dmis.org>, <mingo@...hat.com>, <davem@...emloft.net>,
<ast@...nel.org>, <ryabinin.a.a@...il.com>,
<akpm@...ux-foundation.org>
CC: <mpe@...erman.id.au>, <benh@...nel.crashing.org>,
<paulus@...ba.org>, <bpf@...r.kernel.org>,
<linux-alpha@...r.kernel.org>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Kefeng Wang <wangkefeng.wang@...wei.com>,
Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
Petr Mladek <pmladek@...e.com>,
Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: [PATCH v4 02/11] kallsyms: Fix address-checks for kernel related range
The is_kernel_inittext/is_kernel_text/is_kernel function should not
include the end address(the labels _einittext, _etext and _end) when
check the address range, the issue exists since Linux v2.6.12.
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Cc: Petr Mladek <pmladek@...e.com>
Reviewed-by: Petr Mladek <pmladek@...e.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
Acked-by: Sergey Senozhatsky <senozhatsky@...omium.org>
Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
include/linux/kallsyms.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h
index 2a241e3f063f..b016c62f30a6 100644
--- a/include/linux/kallsyms.h
+++ b/include/linux/kallsyms.h
@@ -27,21 +27,21 @@ struct module;
static inline int is_kernel_inittext(unsigned long addr)
{
if (addr >= (unsigned long)_sinittext
- && addr <= (unsigned long)_einittext)
+ && addr < (unsigned long)_einittext)
return 1;
return 0;
}
static inline int is_kernel_text(unsigned long addr)
{
- if ((addr >= (unsigned long)_stext && addr <= (unsigned long)_etext))
+ if ((addr >= (unsigned long)_stext && addr < (unsigned long)_etext))
return 1;
return in_gate_area_no_mm(addr);
}
static inline int is_kernel(unsigned long addr)
{
- if (addr >= (unsigned long)_stext && addr <= (unsigned long)_end)
+ if (addr >= (unsigned long)_stext && addr < (unsigned long)_end)
return 1;
return in_gate_area_no_mm(addr);
}
--
2.26.2
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