mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-11-15 11:25:22 -05:00
77 lines
1.7 KiB
Diff
77 lines
1.7 KiB
Diff
|
Fix <https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-7309>.
|
||
|
|
|
||
|
|
Taken from this upstream commit, sans ChangeLog updates and tests:
|
||
|
|
<https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=3f635fb43389b54f682fc9ed2acc0b2aaf4a923d>.
|
||
|
|
|
||
|
|
diff --git a/sysdeps/x86_64/memcmp.S b/sysdeps/x86_64/memcmp.S
|
||
|
|
index 1fc487caa5..1322bb3b92 100644
|
||
|
|
--- a/sysdeps/x86_64/memcmp.S
|
||
|
|
+++ b/sysdeps/x86_64/memcmp.S
|
||
|
|
@@ -21,14 +21,18 @@
|
||
|
|
|
||
|
|
.text
|
||
|
|
ENTRY (memcmp)
|
||
|
|
- test %rdx, %rdx
|
||
|
|
+#ifdef __ILP32__
|
||
|
|
+ /* Clear the upper 32 bits. */
|
||
|
|
+ movl %edx, %edx
|
||
|
|
+#endif
|
||
|
|
+ test %RDX_LP, %RDX_LP
|
||
|
|
jz L(finz)
|
||
|
|
cmpq $1, %rdx
|
||
|
|
- jle L(finr1b)
|
||
|
|
+ jbe L(finr1b)
|
||
|
|
subq %rdi, %rsi
|
||
|
|
movq %rdx, %r10
|
||
|
|
cmpq $32, %r10
|
||
|
|
- jge L(gt32)
|
||
|
|
+ jae L(gt32)
|
||
|
|
/* Handle small chunks and last block of less than 32 bytes. */
|
||
|
|
L(small):
|
||
|
|
testq $1, %r10
|
||
|
|
@@ -156,7 +160,7 @@ L(A32):
|
||
|
|
movq %r11, %r10
|
||
|
|
andq $-32, %r10
|
||
|
|
cmpq %r10, %rdi
|
||
|
|
- jge L(mt16)
|
||
|
|
+ jae L(mt16)
|
||
|
|
/* Pre-unroll to be ready for unrolled 64B loop. */
|
||
|
|
testq $32, %rdi
|
||
|
|
jz L(A64)
|
||
|
|
@@ -178,7 +182,7 @@ L(A64):
|
||
|
|
movq %r11, %r10
|
||
|
|
andq $-64, %r10
|
||
|
|
cmpq %r10, %rdi
|
||
|
|
- jge L(mt32)
|
||
|
|
+ jae L(mt32)
|
||
|
|
|
||
|
|
L(A64main):
|
||
|
|
movdqu (%rdi,%rsi), %xmm0
|
||
|
|
@@ -216,7 +220,7 @@ L(mt32):
|
||
|
|
movq %r11, %r10
|
||
|
|
andq $-32, %r10
|
||
|
|
cmpq %r10, %rdi
|
||
|
|
- jge L(mt16)
|
||
|
|
+ jae L(mt16)
|
||
|
|
|
||
|
|
L(A32main):
|
||
|
|
movdqu (%rdi,%rsi), %xmm0
|
||
|
|
@@ -254,7 +258,7 @@ L(ATR):
|
||
|
|
movq %r11, %r10
|
||
|
|
andq $-32, %r10
|
||
|
|
cmpq %r10, %rdi
|
||
|
|
- jge L(mt16)
|
||
|
|
+ jae L(mt16)
|
||
|
|
testq $16, %rdi
|
||
|
|
jz L(ATR32)
|
||
|
|
|
||
|
|
@@ -325,7 +329,7 @@ L(ATR64main):
|
||
|
|
movq %r11, %r10
|
||
|
|
andq $-32, %r10
|
||
|
|
cmpq %r10, %rdi
|
||
|
|
- jge L(mt16)
|
||
|
|
+ jae L(mt16)
|
||
|
|
|
||
|
|
L(ATR32res):
|
||
|
|
movdqa (%rdi,%rsi), %xmm0
|