./proxmark3 Segmentation fault

[iDoka]

I have the same behaviour on v3.0.1 and from lastest git version, when I run ./proxmark3 with device path I get Segmentation fault:

$ ./proxmark3 /dev/ttyACM0
Segmentation fault (core dumped)

I add -g -O0 to in Makefile and run under gdb:

$ gdb --args ./proxmark3 /dev/ttyACM0
GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-100.el7_4.1
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/doka/proj/RFID/proxmark3-3.0.1/client/proxmark3...done.
(gdb) run
Starting program: /home/doka/proj/RFID/proxmark3-3.0.1/client/./proxmark3 /dev/ttyACM0
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff584c921 in __strlen_sse2_pminub () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install bzip2-libs-1.0.6-13.el7.x86_64 elfutils-libelf-0.168-8.el7.x86_64 elfutils-libs-0.168-8.el7.x86_64 expat-2.1.0-10.el7_3.x86_64 glib2-2.50.3-3.el7.x86_64 glibc-2.17-196.el7_4.2.x86_64 libX11-1.6.5-1.el7.x86_64 libXau-1.0.8-2.1.el7.x86_64 libXdamage-1.1.4-4.1.el7.x86_64 libXext-1.3.3-3.el7.x86_64 libXfixes-5.0.3-1.el7.x86_64 libXxf86vm-1.1.4-1.el7.x86_64 libattr-2.4.46-12.el7.x86_64 libcap-2.22-9.el7.x86_64 libdrm-2.4.74-1.el7.x86_64 libffi-3.0.13-18.el7.x86_64 libgcc-4.8.5-16.el7_4.1.x86_64 libgcrypt-1.5.3-14.el7.x86_64 libgpg-error-1.12-3.el7.x86_64 libicu-50.1.2-15.el7.x86_64 libpng-1.5.13-7.el7_2.x86_64 libselinux-2.5-12.el7.x86_64 libstdc++-4.8.5-16.el7_4.1.x86_64 libxcb-1.12-1.el7.x86_64 libxshmfence-1.2-1.el7.x86_64 mesa-libGL-17.0.1-6.20170307.el7.x86_64 mesa-libglapi-17.0.1-6.20170307.el7.x86_64 ncurses-libs-5.9-14.20130511.el7_4.x86_64 pcre-8.32-17.el7.x86_64 qt5-qtbase-5.6.2-1.el7.x86_64 qt5-qtbase-gui-5.6.2-1.el7.x86_64 readline-6.2-10.el7.x86_64 systemd-libs-219-42.el7_4.7.x86_64 xz-libs-5.2.2-1.el7.x86_64 zlib-1.2.7-17.el7.x86_64
(gdb) backtrace
#0  0x00007ffff584c921 in __strlen_sse2_pminub () at /lib64/libc.so.6
#1  0x00000000004129fd in wai_getExecutablePath (out=0x0, capacity=0, dirname_length=0x0) at whereami.c:198
#2  0x0000000000407fe2 in set_my_executable_path () at proxmark3.c:206
#3  0x00000000004081d1 in main (argc=2, argv=0x7fffffffd788) at proxmark3.c:243
(gdb) 

At build stage I get highlighted warning also associated with wai_getExecutablePath:

gcc -MT obj/whereami.o -MMD -MP -MF obj/whereami.Td -std=c99 -D_ISOC99_SOURCE -I. -I../include -I../common -I../zlib -I/opt/local/include -I../liblua -Wall  -g -O0 -DHAVE_GUI -DZ_SOLO -DZ_PREFIX -DNO_GZIP -DZLIB_PM3_TUNED  -c -o obj/whereami.o whereami.c
whereami.c: In function ‘wai_getExecutablePath’:
whereami.c:194:5: warning: implicit declaration of function ‘realpath’ [-Wimplicit-function-declaration]
     resolved = realpath(WAI_PROC_SELF_EXE, buffer);
     ^
whereami.c:194:14: warning: assignment makes pointer from integer without a cast [enabled by default]
     resolved = realpath(WAI_PROC_SELF_EXE, buffer);
              ^
whereami.c: In function ‘wai_getModulePath’:
whereami.c:271:20: warning: assignment makes pointer from integer without a cast [enabled by default]
           resolved = realpath(path, buffer);
                    ^
mv -f obj/whereami.Td obj/whereami.d

I'm try to replace whereami.c on lastest version from here: https://github.com/gpakosz/whereami/blob/master/src/whereami.c but issue by run the same.

How can I fix it?

---

PS: my OS is CentOS 7.4 64bit

[pwpiwi]

realpath() is usually defined in stdlib.h which is included by whereami.c. Isn't this the case for CentOS?

[iDoka]

On my system realpath() defined inside preprocessing pragma:

$ grep -nA2 -B7 realpath /usr/include/stdlib.h
726-
727-#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
728-/* Return the canonical absolute name of file NAME.  If RESOLVED is
729-   null, the result is malloc'd; otherwise, if the canonical name is
730-   PATH_MAX chars or more, returns null with `errno' set to
731-   ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
732-   returns the name in RESOLVED.  */
733:extern char *realpath (const char *__restrict __name,
734-               char *__restrict __resolved) __THROW __wur;
735-#endif

Any ideas for workaround?

[pwpiwi]

We would need something like

#ifdef CentOS
#define __USE_BSD
#endif

(or whatever is defined on CentOS).

[iDoka]

here predefined macros in CentOS 7:

$ gcc -dM -E - </dev/null

#define __DBL_MIN_EXP__ (-1021)
#define __UINT_LEAST16_MAX__ 65535
#define __ATOMIC_ACQUIRE 2
#define __FLT_MIN__ 1.17549435082228750797e-38F
#define __UINT_LEAST8_TYPE__ unsigned char
#define __INTMAX_C(c) c ## L
#define __CHAR_BIT__ 8
#define __UINT8_MAX__ 255
#define __WINT_MAX__ 4294967295U
#define __ORDER_LITTLE_ENDIAN__ 1234
#define __SIZE_MAX__ 18446744073709551615UL
#define __WCHAR_MAX__ 2147483647
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 1
#define __DBL_DENORM_MIN__ ((double)4.94065645841246544177e-324L)
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 1
#define __GCC_ATOMIC_CHAR_LOCK_FREE 2
#define __FLT_EVAL_METHOD__ 0
#define __unix__ 1
#define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 2
#define __x86_64 1
#define __UINT_FAST64_MAX__ 18446744073709551615UL
#define __SIG_ATOMIC_TYPE__ int
#define __DBL_MIN_10_EXP__ (-307)
#define __FINITE_MATH_ONLY__ 0
#define __GNUC_PATCHLEVEL__ 5
#define __UINT_FAST8_MAX__ 255
#define __DEC64_MAX_EXP__ 385
#define __INT8_C(c) c
#define __UINT_LEAST64_MAX__ 18446744073709551615UL
#define __SHRT_MAX__ 32767
#define __LDBL_MAX__ 1.18973149535723176502e+4932L
#define __UINT_LEAST8_MAX__ 255
#define __GCC_ATOMIC_BOOL_LOCK_FREE 2
#define __UINTMAX_TYPE__ long unsigned int
#define __linux 1
#define __DEC32_EPSILON__ 1E-6DF
#define __unix 1
#define __UINT32_MAX__ 4294967295U
#define __LDBL_MAX_EXP__ 16384
#define __WINT_MIN__ 0U
#define __linux__ 1
#define __SCHAR_MAX__ 127
#define __WCHAR_MIN__ (-__WCHAR_MAX__ - 1)
#define __INT64_C(c) c ## L
#define __DBL_DIG__ 15
#define __GCC_ATOMIC_POINTER_LOCK_FREE 2
#define __SIZEOF_INT__ 4
#define __SIZEOF_POINTER__ 8
#define __USER_LABEL_PREFIX__ 
#define __STDC_HOSTED__ 1
#define __LDBL_HAS_INFINITY__ 1
#define __FLT_EPSILON__ 1.19209289550781250000e-7F
#define __LDBL_MIN__ 3.36210314311209350626e-4932L
#define __DEC32_MAX__ 9.999999E96DF
#define __INT32_MAX__ 2147483647
#define __SIZEOF_LONG__ 8
#define __STDC_IEC_559__ 1
#define __STDC_ISO_10646__ 201103L
#define __UINT16_C(c) c
#define __DECIMAL_DIG__ 21
#define __gnu_linux__ 1
#define __LDBL_HAS_QUIET_NAN__ 1
#define __GNUC__ 4
#define __MMX__ 1
#define __FLT_HAS_DENORM__ 1
#define __SIZEOF_LONG_DOUBLE__ 16
#define __BIGGEST_ALIGNMENT__ 16
#define __DBL_MAX__ ((double)1.79769313486231570815e+308L)
#define __INT_FAST32_MAX__ 9223372036854775807L
#define __DBL_HAS_INFINITY__ 1
#define __DEC32_MIN_EXP__ (-94)
#define __INT_FAST16_TYPE__ long int
#define __LDBL_HAS_DENORM__ 1
#define __DEC128_MAX__ 9.999999999999999999999999999999999E6144DL
#define __INT_LEAST32_MAX__ 2147483647
#define __DEC32_MIN__ 1E-95DF
#define __DBL_MAX_EXP__ 1024
#define __DEC128_EPSILON__ 1E-33DL
#define __SSE2_MATH__ 1
#define __ATOMIC_HLE_RELEASE 131072
#define __PTRDIFF_MAX__ 9223372036854775807L
#define __amd64 1
#define __STDC_NO_THREADS__ 1
#define __ATOMIC_HLE_ACQUIRE 65536
#define __LONG_LONG_MAX__ 9223372036854775807LL
#define __SIZEOF_SIZE_T__ 8
#define __SIZEOF_WINT_T__ 4
#define __GCC_HAVE_DWARF2_CFI_ASM 1
#define __GXX_ABI_VERSION 1002
#define __FLT_MIN_EXP__ (-125)
#define __INT_FAST64_TYPE__ long int
#define __DBL_MIN__ ((double)2.22507385850720138309e-308L)
#define __LP64__ 1
#define __DECIMAL_BID_FORMAT__ 1
#define __DEC128_MIN__ 1E-6143DL
#define __REGISTER_PREFIX__ 
#define __UINT16_MAX__ 65535
#define __DBL_HAS_DENORM__ 1
#define __UINT8_TYPE__ unsigned char
#define __NO_INLINE__ 1
#define __FLT_MANT_DIG__ 24
#define __VERSION__ "4.8.5 20150623 (Red Hat 4.8.5-16)"
#define __UINT64_C(c) c ## UL
#define _STDC_PREDEF_H 1
#define __GCC_ATOMIC_INT_LOCK_FREE 2
#define __FLOAT_WORD_ORDER__ __ORDER_LITTLE_ENDIAN__
#define __STDC_IEC_559_COMPLEX__ 1
#define __INT32_C(c) c
#define __DEC64_EPSILON__ 1E-15DD
#define __ORDER_PDP_ENDIAN__ 3412
#define __DEC128_MIN_EXP__ (-6142)
#define __INT_FAST32_TYPE__ long int
#define __UINT_LEAST16_TYPE__ short unsigned int
#define unix 1
#define __INT16_MAX__ 32767
#define __SIZE_TYPE__ long unsigned int
#define __UINT64_MAX__ 18446744073709551615UL
#define __INT8_TYPE__ signed char
#define __ELF__ 1
#define __FLT_RADIX__ 2
#define __INT_LEAST16_TYPE__ short int
#define __LDBL_EPSILON__ 1.08420217248550443401e-19L
#define __UINTMAX_C(c) c ## UL
#define __GNUC_RH_RELEASE__ 16
#define __SSE_MATH__ 1
#define __k8 1
#define __SIG_ATOMIC_MAX__ 2147483647
#define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
#define __SIZEOF_PTRDIFF_T__ 8
#define __x86_64__ 1
#define __DEC32_SUBNORMAL_MIN__ 0.000001E-95DF
#define __INT_FAST16_MAX__ 9223372036854775807L
#define __UINT_FAST32_MAX__ 18446744073709551615UL
#define __UINT_LEAST64_TYPE__ long unsigned int
#define __FLT_HAS_QUIET_NAN__ 1
#define __FLT_MAX_10_EXP__ 38
#define __LONG_MAX__ 9223372036854775807L
#define __DEC128_SUBNORMAL_MIN__ 0.000000000000000000000000000000001E-6143DL
#define __FLT_HAS_INFINITY__ 1
#define __UINT_FAST16_TYPE__ long unsigned int
#define __DEC64_MAX__ 9.999999999999999E384DD
#define __CHAR16_TYPE__ short unsigned int
#define __PRAGMA_REDEFINE_EXTNAME 1
#define __INT_LEAST16_MAX__ 32767
#define __DEC64_MANT_DIG__ 16
#define __INT64_MAX__ 9223372036854775807L
#define __UINT_LEAST32_MAX__ 4294967295U
#define __GCC_ATOMIC_LONG_LOCK_FREE 2
#define __INT_LEAST64_TYPE__ long int
#define __INT16_TYPE__ short int
#define __INT_LEAST8_TYPE__ signed char
#define __DEC32_MAX_EXP__ 97
#define __INT_FAST8_MAX__ 127
#define __INTPTR_MAX__ 9223372036854775807L
#define linux 1
#define __SSE2__ 1
#define __LDBL_MANT_DIG__ 64
#define __DBL_HAS_QUIET_NAN__ 1
#define __SIG_ATOMIC_MIN__ (-__SIG_ATOMIC_MAX__ - 1)
#define __code_model_small__ 1
#define __k8__ 1
#define __INTPTR_TYPE__ long int
#define __UINT16_TYPE__ short unsigned int
#define __WCHAR_TYPE__ int
#define __SIZEOF_FLOAT__ 4
#define __UINTPTR_MAX__ 18446744073709551615UL
#define __DEC64_MIN_EXP__ (-382)
#define __INT_FAST64_MAX__ 9223372036854775807L
#define __GCC_ATOMIC_TEST_AND_SET_TRUEVAL 1
#define __FLT_DIG__ 6
#define __UINT_FAST64_TYPE__ long unsigned int
#define __INT_MAX__ 2147483647
#define __amd64__ 1
#define __INT64_TYPE__ long int
#define __FLT_MAX_EXP__ 128
#define __ORDER_BIG_ENDIAN__ 4321
#define __DBL_MANT_DIG__ 53
#define __INT_LEAST64_MAX__ 9223372036854775807L
#define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 2
#define __DEC64_MIN__ 1E-383DD
#define __WINT_TYPE__ unsigned int
#define __UINT_LEAST32_TYPE__ unsigned int
#define __SIZEOF_SHORT__ 2
#define __SSE__ 1
#define __LDBL_MIN_EXP__ (-16381)
#define __INT_LEAST8_MAX__ 127
#define __SIZEOF_INT128__ 16
#define __LDBL_MAX_10_EXP__ 4932
#define __ATOMIC_RELAXED 0
#define __DBL_EPSILON__ ((double)2.22044604925031308085e-16L)
#define _LP64 1
#define __UINT8_C(c) c
#define __INT_LEAST32_TYPE__ int
#define __SIZEOF_WCHAR_T__ 4
#define __UINT64_TYPE__ long unsigned int
#define __INT_FAST8_TYPE__ signed char
#define __DBL_DECIMAL_DIG__ 17
#define __FXSR__ 1
#define __DEC_EVAL_METHOD__ 2
#define __UINT32_C(c) c ## U
#define __INTMAX_MAX__ 9223372036854775807L
#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
#define __FLT_DENORM_MIN__ 1.40129846432481707092e-45F
#define __INT8_MAX__ 127
#define __UINT_FAST32_TYPE__ long unsigned int
#define __CHAR32_TYPE__ unsigned int
#define __FLT_MAX__ 3.40282346638528859812e+38F
#define __INT32_TYPE__ int
#define __SIZEOF_DOUBLE__ 8
#define __FLT_MIN_10_EXP__ (-37)
#define __INTMAX_TYPE__ long int
#define __DEC128_MAX_EXP__ 6145
#define __ATOMIC_CONSUME 1
#define __GNUC_MINOR__ 8
#define __UINTMAX_MAX__ 18446744073709551615UL
#define __DEC32_MANT_DIG__ 7
#define __DBL_MAX_10_EXP__ 308
#define __LDBL_DENORM_MIN__ 3.64519953188247460253e-4951L
#define __INT16_C(c) c
#define __STDC__ 1
#define __PTRDIFF_TYPE__ long int
#define __ATOMIC_SEQ_CST 5
#define __UINT32_TYPE__ unsigned int
#define __UINTPTR_TYPE__ long unsigned int
#define __DEC64_SUBNORMAL_MIN__ 0.000000000000001E-383DD
#define __DEC128_MANT_DIG__ 34
#define __LDBL_MIN_10_EXP__ (-4931)
#define __SIZEOF_LONG_LONG__ 8
#define __GCC_ATOMIC_LLONG_LOCK_FREE 2
#define __LDBL_DIG__ 18
#define __FLT_DECIMAL_DIG__ 9
#define __UINT_FAST16_MAX__ 18446744073709551615UL
#define __GNUC_GNU_INLINE__ 1
#define __GCC_ATOMIC_SHORT_LOCK_FREE 2
#define __UINT_FAST8_TYPE__ unsigned char
#define __ATOMIC_ACQ_REL 4
#define __ATOMIC_RELEASE 3

which one and where I should use for solve issue?

[pwpiwi]

Hmm, I can't see anything specific for CentOS. Another option would be to define __USE_BSD for all Linux versions - hoping that it doesn't create other issues.

[iDoka]

I added -D__USE_BSD to all CFLAGS/CXXFLAGS options in make but issue isn't fix:

gcc -MT obj/whereami.o -MMD -MP -MF obj/whereami.Td  -std=c99 -D_ISOC99_SOURCE -I. -I../include -I../common -I../common/polarssl -I../zlib -I../uart -I/opt/local/include -I../liblua -I./jansson -Wall -g -O3 -D__USE_BSD  -DWITH_ISO14443a_StandAlone -DWITH_LF -DWITH_ISO15693 -DWITH_ISO14443a -DWITH_ISO14443b -DWITH_ICLASS -DWITH_LEGICRF -DWITH_HITAG -DWITH_CRC -DWITH_HFSNOOP -DWITH_GUI -DHAVE_GUI -DZ_SOLO -DZ_PREFIX -DNO_GZIP -DZLIB_PM3_TUNED  -c -o obj/whereami.o whereami.c
whereami.c: In function ‘wai_getExecutablePath’:
whereami.c:194:5: warning: implicit declaration of function ‘realpath’ [-Wimplicit-function-declaration]
     resolved = realpath(WAI_PROC_SELF_EXE, buffer);
     ^
whereami.c:194:14: warning: assignment makes pointer from integer without a cast [enabled by default]
     resolved = realpath(WAI_PROC_SELF_EXE, buffer);
              ^
whereami.c: In function ‘wai_getModulePath’:
whereami.c:271:20: warning: assignment makes pointer from integer without a cast [enabled by default]
           resolved = realpath(path, buffer);
                    ^
mv -f obj/whereami.Td obj/whereami.d

I seems that __USE_BSD isn't root of cause.

[merlokk]

what lines in proxmark3.c do you have in your sources? in master branch there are strange lines there....

#2  0x0000000000407fe2 in set_my_executable_path () at proxmark3.c:206
#3  0x00000000004081d1 in main (argc=2, argv=0x7fffffffd788) at proxmark3.c:243

[iDoka]

@merlokk I try both versions: from lastest git and from here: https://github.com/Proxmark/proxmark3/archive/v3.0.1.tar.gz

Currently I use v3.0.1

[pwpiwi]

Try with _BSD_SOURCE instead.

[iDoka]

@pwpiwi much thanks!!! _BSD_SOURCE works for my case!

[merlokk]

https://github.com/gpakosz/whereami/issues/15