Re: [PATCH v2] s390: Fix strrchr() implementation

[Heiko Carstens]

On Tue, Oct 05, 2021 at 01:30:45PM +0000, Roberto Sassu wrote:
> > From: Juergen Gross [mailto:jgross@xxxxxxxx]
> > Sent: Tuesday, October 5, 2021 3:25 PM
> > On 05.10.21 15:14, Heiko Carstens wrote:
> > > On Tue, Oct 05, 2021 at 02:08:36PM +0200, Roberto Sassu wrote:
> > >> Fix two problems found in the strrchr() implementation for s390
> > >> architectures: evaluate empty strings (return the string address instead of
> > >> NULL, if '\0' is passed as second argument); evaluate the first character
> > >> of non-empty strings (the current implementation stops at the second).
> > >>
> > >> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> > >> Cc: stable@xxxxxxxxxxxxxxx
> > >> Reported-by: Heiko Carstens <hca@xxxxxxxxxxxxx> (incorrect behavior with
> > empty strings)
> > >> Signed-off-by: Roberto Sassu <roberto.sassu@xxxxxxxxxx>
> > >> ---
> > >>   arch/s390/lib/string.c | 15 +++++++--------
> > >>   1 file changed, 7 insertions(+), 8 deletions(-)
> > >
> > > Applied, thanks!
> > >
> > 
> > Really? I just wanted to write a response: len is unsigned (size_t)
> > and compared to be >= 0, which sounds like always true.
> 
> Thanks for catching this. Will fix it.

I'll fix it. No need to resend.