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3daef2c8ee
glibc/string
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Adhemerval Zanella 3daef2c8ee Fix x86_64 memchr for large input sizes 
Current optimized memchr for x86_64 does for input arguments pointers
module 64 in range of [49,63] if there is no searchr char in the rest
of 64-byte block a pointer addition which might overflow:

* sysdeps/x86_64/memchr.S

    77          .p2align 4
    78  L(unaligned_no_match):
    79          add     %rcx, %rdx

Add (uintptr_t)s % 16 to n in %rdx.

    80          sub     $16, %rdx
    81          jbe     L(return_null)

This patch fixes by adding a saturated math that sets a maximum pointer
value if it overflows (UINTPTR_MAX).

Checked on x86_64-linux-gnu and powerpc64-linux-gnu.

	[BZ# 19387]
	* sysdeps/x86_64/memchr.S (memchr): Avoid overflow in pointer
	addition.
	* string/test-memchr.c (do_test): Remove alignment limitation.
	(test_main): Add test that trigger BZ# 19387.
2016-12-27 10:50:41 -02:00
..
bits This patch cleans up the strsep implementation and improves performance. 2016-12-21 15:16:29 +00:00
_strerror.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-addsep.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-append.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-count.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-create.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-ctsep.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-delete.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-extract.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-insert.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-next.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-replace.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-stringify.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
basename.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
bcopy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
bug-envz1.c * string/Makefile (tests): Add bug-envz1. 2006-06-04 16:36:04 +00:00
bug-strcoll1.c Update. 2001-04-26 20:45:18 +00:00
bug-strcoll2.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
bug-strncat1.c
bug-strpbrk1.c
bug-strspn1.c
bug-strtok1.c [BZ #2126] 2006-01-10 00:25:07 +00:00
byteswap.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
bzero.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Depend
endian.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
envz.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
envz.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
explicit_bzero.c New string function explicit_bzero (from OpenBSD). 2016-12-16 16:21:54 -05:00
ffs.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ffsll.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
inl-tester.c
Makefile Disable stack protector in early static initialization [BZ #7065] 2016-12-26 10:08:45 +01:00
memccpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memcmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memfrob.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memmem.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memmove.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memory.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
mempcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memrchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memset.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
noinl-tester.c
rawmemchr.c Improve generic rawmemchr for targets that don't have an 2016-12-14 13:16:13 +00:00
stpcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
stpncpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
str-two-way.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
stratcliff.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcasecmp_l.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcasecmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcasestr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcat.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strchrnul.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcoll_l.c Bug 20729: Fix building with -Os. 2016-10-29 23:50:56 -04:00
strcoll.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcspn.c Use PTR_ALIGN_DOWN on strcspn and strspn 2016-04-01 18:33:03 -03:00
strdup.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strerror_l.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strerror.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strfry.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
string-inlines.c This patch cleans up the strsep implementation and improves performance. 2016-12-21 15:16:29 +00:00
string.h New string function explicit_bzero (from OpenBSD). 2016-12-16 16:21:54 -05:00
strings.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strlen.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strncase_l.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strncase.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strncat.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strncmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strncpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strndup.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strnlen.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strpbrk.c Improve generic strpbrk performance 2016-04-01 10:44:45 -03:00
strrchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strsep.c This patch cleans up the strsep implementation and improves performance. 2016-12-21 15:16:29 +00:00
strsignal.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strspn.c Use PTR_ALIGN_DOWN on strcspn and strspn 2016-04-01 18:33:03 -03:00
strstr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strtok_r.c Improve strtok and strtok_r performance. Instead of calling strpbrk which 2016-12-14 15:12:18 +00:00
strtok.c Improve strtok and strtok_r performance. Instead of calling strpbrk which 2016-12-14 15:12:18 +00:00
strverscmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strxfrm_l.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strxfrm.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
swab.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-bcopy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-bzero.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-explicit_bzero.c New string function explicit_bzero (from OpenBSD). 2016-12-16 16:21:54 -05:00
test-ffs.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memccpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memchr.c Fix x86_64 memchr for large input sizes 2016-12-27 10:50:41 -02:00
test-memcmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memcpy.c Clear destination buffer updated by the previous run 2016-05-18 05:51:59 -07:00
test-memmem.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memmove.c Clear destination buffer updated by the previous run 2016-05-18 05:51:59 -07:00
test-mempcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memrchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memset.c New string function explicit_bzero (from OpenBSD). 2016-12-16 16:21:54 -05:00
test-rawmemchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-stpcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-stpncpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strcasecmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strcasestr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strcat.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strchrnul.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strcmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strcspn.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-string.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strlen.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strncasecmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strncat.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strncmp.c Fix wide-char testsuite SIGBUS on platforms such as Sparc. 2016-08-02 17:46:58 -07:00
test-strncpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strnlen.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strpbrk.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strrchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strspn.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strstr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
testcopy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tester.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-bswap.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-cmp.c string: More tests for strcmp, strcasecmp, strncmp, strncasecmp 2016-08-26 14:28:46 +02:00
tst-endian.c S390: Fix build failure in test string/tst-endian.c with gcc 6. 2016-01-25 12:44:46 +01:00
tst-inlcall.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-strcoll-overflow.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-strfry.c * stdlib/random_r.c (__initstate_r): Don't use non-existing state. 2005-04-12 15:29:07 +00:00
tst-strlen.c Modify several tests to use test-skeleton.c 2015-08-06 02:59:04 -04:00
tst-strtok_r.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-strtok.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-strxfrm2.c Let 'make check subdirs=string' succeed even when it's invoked 2015-09-28 16:55:57 -04:00
tst-strxfrm.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-svc2.c [BZ #9893] 2009-03-14 23:57:33 +00:00
tst-svc.c Modify several tests to use test-skeleton.c 2015-08-06 02:59:04 -04:00
tst-svc.expect * string/strverscmp.c (__strverscmp): Fix last cleanups. 2009-04-07 06:51:59 +00:00
tst-svc.input * string/strverscmp.c (__strverscmp): Fix last cleanups. 2009-04-07 06:51:59 +00:00
tst-xbzero-opt.c Do not require memset elimination in explicit_bzero test 2016-12-20 11:08:10 +01:00
Versions New string function explicit_bzero (from OpenBSD). 2016-12-16 16:21:54 -05:00
wordcopy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
xpg-strerror.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00