change the subject.
Tony He <huangy...@gmail.com> 于2021年1月13日周三 下午5:03写道：
> Sorry, clicked "send" button before adding subject and CC Openvpn-dev. I
> will send a new mail.
>
> Tony He <huangy...@gmail.com> 于2021年1月13日周三 下午4:57写道：
>
>> Hi Antonio,
>>
>> I see you have pushed new commits to support multiple link to peers. So I
>> tried compiling, but encounter below error. My kernel version is 5.4.0-54.
>>
>>
>>
>> tony-vm-2004% make
>>
>>
>> /project/openvpn/ovpn-dco.git/gen-compat-autoconf.sh
>> /project/openvpn/ovpn-dco.git/compat-autoconf.h
>>
>>
>> make -C /lib/modules/5.4.0-54-generic/build
>> M=/project/openvpn/ovpn-dco.git PWD=/project/openvpn/ovpn-dco.git
>> REVISION=2555e55 CONFIG_OVPN_DCO=m INSTALL_MOD_DIR=updates/ modules
>>
>> make[1]: Entering directory '/usr/src/linux-headers-5.4.0-54-generic'
>>
>>
>> CC [M] /project/openvpn/ovpn-dco.git/drivers/net/ovpn-dco/main.o
>>
>>
>> CC [M] /project/openvpn/ovpn-dco.git/drivers/net/ovpn-dco/bind.o
>>
>>
>> CC [M] /project/openvpn/ovpn-dco.git/drivers/net/ovpn-dco/crypto.o
>>
>>
>> CC [M] /project/openvpn/ovpn-dco.git/drivers/net/ovpn-dco/ovpn.o
>>
>>
>> CC [M] /project/openvpn/ovpn-dco.git/drivers/net/ovpn-dco/peer.o
>>
>>
>> In file included from ./include/linux/bitmap.h:9,
>>
>>
>> from ./include/linux/cpumask.h:12,
>>
>>
>> from ./arch/x86/include/asm/cpumask.h:5,
>>
>>
>> from ./arch/x86/include/asm/msr.h:11,
>>
>>
>> from ./arch/x86/include/asm/processor.h:21,
>>
>>
>> from ./arch/x86/include/asm/cpufeature.h:5,
>>
>>
>> from ./arch/x86/include/asm/thread_info.h:53,
>>
>>
>> from ./include/linux/thread_info.h:38,
>>
>>
>> from ./arch/x86/include/asm/preempt.h:7,
>>
>>
>> from ./include/linux/preempt.h:78,
>>
>>
>> from ./include/linux/spinlock.h:51,
>>
>>
>> from ./include/linux/seqlock.h:36,
>>
>>
>> from ./include/linux/time.h:6,
>>
>>
>> from ./include/linux/ktime.h:24,
>>
>>
>> from ./include/linux/timer.h:6,
>>
>>
>> from ./include/linux/netdevice.h:24,
>>
>>
>> from /project/openvpn/ovpn-dco.git/linux-compat.h:20,
>>
>>
>> from <command-line>:
>>
>>
>> In function ‘memcmp’,
>>
>>
>> inlined from ‘ovpn_peer_lookup_transp_addr’ at
>> /project/openvpn/ovpn-dco.git/drivers/net/ovpn-dco/peer.c:457:8:
>>
>>
>> ./include/linux/string.h:440:4: error: call to ‘__read_overflow’ declared
>> with attribute error: detected read beyond size of object passed as 1st
>> parameter
>> 440 | __read_overflow();
>> | ^~~~~~~~~~~~~~~~~
>> make[3]: *** [scripts/Makefile.build:275:
>> /project/openvpn/ovpn-dco.git/drivers/net/ovpn-dco/peer.o] Error 1
>> make[2]: *** [scripts/Makefile.build:522:
>> /project/openvpn/ovpn-dco.git/drivers/net/ovpn-dco] Error 2
>> make[1]: *** [Makefile:1757: /project/openvpn/ovpn-dco.git] Error 2
>> make[1]: Leaving directory '/usr/src/linux-headers-5.4.0-54-generic'
>> make: *** [Makefile:46: all] Error 2
>>
>>
>> Function memcmp
>> in /usr/src/linux-headers-5.4.0-54-generic/include/linux/string.h.
>> 434 __FORTIFY_INLINE int memcmp(const void *p, const void *q,
>> __kernel_size_t size)
>> 435 {
>> 436 size_t p_size = __builtin_object_size(p, 0);
>> 437 size_t q_size = __builtin_object_size(q, 0);
>> 438 if (__builtin_constant_p(size)) {
>> 439 if (p_size < size)
>> 440 __read_overflow();
>> 441 if (q_size < size)
>> 442 __read_overflow2();
>> 443 }
>> 444 if (p_size < size || q_size < size)
>> 445 fortify_panic(__func__);
>> 446 return __underlying_memcmp(p, q, size);
>> 447 }
>>
>> Seems that p_size is 8 in above memcmp function because if I change your
>> code as below , then it's OK(9 causes same error).
>> 456 case AF_INET6:
>> 457 if (memcmp((void *)&sa6->sin6_addr, (void
>> *)&bind->sa.in6.sin6_addr,
>> 458 // sizeof(struct in6_addr)))
>> 459 8))
>> 460 break;
>>
>> Tony
>>
>
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