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.

Link: https://lkml.kernel.org/r/20210930071143.63410-3-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Alexander Potapenko <glider@google.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h
index bac34097267084d05d55fe827d59368dc8f7ed98..62ce22b27ea82272641e3aa50cf8160ef527c0f2 100644 (file)
--- 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);
 }