Comment 8 for bug 2001932

(In reply to Sunil Pandey from comment #6)
> (In reply to H.J. Lu from comment #5)
> > (In reply to Sunil Pandey from comment #4)
> > > Created attachment 12601 [details]
> > > strncmp_avx2 patch for pr25933
> > >
> > > Tested attached patch on
> > >
> > > https://gitlab.com/x86-glibc/glibc/-/commits/users/hjl/pr25933/master
> >
> > Looks good. Please try this
> >
> > diff --git a/sysdeps/x86_64/multiarch/strcmp-avx2.S
> > b/sysdeps/x86_64/multiarch/strcmp-avx2.S
> > index 48d03a9f46..dabc3e7590 100644
> > --- a/sysdeps/x86_64/multiarch/strcmp-avx2.S
> > +++ b/sysdeps/x86_64/multiarch/strcmp-avx2.S
> > @@ -256,6 +256,11 @@ L(next_3_vectors):
> > vpmovmskb %ymm0, %ecx
> > testl %ecx, %ecx
> > jne L(return_3_vec_size)
> > +# ifdef USE_AS_STRNCMP
> > + /* Check if VEC_SIZE * 4 already exceeded max compare count %r11 */
> > + cmpq $(VEC_SIZE * 4), %r11
> > + jbe L(zero)
> > +# endif
> > L(main_loop_header):
> > leaq (VEC_SIZE * 4)(%rdi), %rdx
> > movl $PAGE_SIZE, %ecx
>
> It fixes the issue on my setup as expected.
>
> $ ./test-strncmp
> simple_strncmp stupid_strncmp __strncmp_avx2
> __strncmp_sse42 __strncmp_ssse3 __strncmp_sse2
> $ echo $?
> 0
>

Did you run "make check"?