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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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