AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-11-22 21:10:07 +00:00
Code Issues Packages Projects Releases Wiki Activity
97700a34f3
glibc/sysdeps/x86_64/x32
History
H.J. Lu 97700a34f3 x86-64 memchr/wmemchr: Properly handle the length parameter [BZ# 24097] 
On x32, the size_t parameter may be passed in the lower 32 bits of a
64-bit register with the non-zero upper 32 bits.  The string/memory
functions written in assembly can only use the lower 32 bits of a
64-bit register as length or must clear the upper 32 bits before using
the full 64-bit register for length.

This pach fixes memchr/wmemchr for x32.  Tested on x86-64 and x32.  On
x86-64, libc.so is the same with and withou the fix.

	[BZ# 24097]
	CVE-2019-6488
	* sysdeps/x86_64/memchr.S: Use RDX_LP for length.  Clear the
	upper 32 bits of RDX register.
	* sysdeps/x86_64/multiarch/memchr-avx2.S: Likewise.
	* sysdeps/x86_64/x32/Makefile (tests): Add tst-size_t-memchr and
	tst-size_t-wmemchr.
	* sysdeps/x86_64/x32/test-size_t.h: New file.
	* sysdeps/x86_64/x32/tst-size_t-memchr.c: Likewise.
	* sysdeps/x86_64/x32/tst-size_t-wmemchr.c: Likewise.
2019-01-21 11:24:13 -08:00
..
fpu Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
_itoa.h Add a comment to sysdeps/x86_64/x32/_itoa.h 2012-05-19 06:46:29 -07:00
divdi3.c Add dummy files for x32 2012-05-16 10:24:02 -07:00
dl-machine.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
ffs.c Add x32 ffs 2012-05-16 11:54:56 -07:00
gmp-mparam.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
Implies-after Add x86_64 Implies-after files 2012-05-15 14:38:32 -07:00
Makefile x86-64 memchr/wmemchr: Properly handle the length parameter [BZ# 24097] 2019-01-21 11:24:13 -08:00
symbol-hacks.h Include generic symbol-hacks.h for x32 2014-01-20 11:11:01 -08:00
sysdep.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
test-size_t.h x86-64 memchr/wmemchr: Properly handle the length parameter [BZ# 24097] 2019-01-21 11:24:13 -08:00
tst-size_t-memchr.c x86-64 memchr/wmemchr: Properly handle the length parameter [BZ# 24097] 2019-01-21 11:24:13 -08:00
tst-size_t-wmemchr.c x86-64 memchr/wmemchr: Properly handle the length parameter [BZ# 24097] 2019-01-21 11:24:13 -08:00