On Thu, Aug 15, 2024 at 12:40:12PM -0600, Jens Axboe wrote:
> On 8/15/24 11:58 AM, Breno Leitao wrote:
> >> 1) There exists some new-ish macros in overflow.h that perform
> >> wrapping arithmetic without triggering sanitizer splats -- check out
> >> the wrapping_* suite of macros.
> >
> > do they
On 8/15/24 11:58 AM, Breno Leitao wrote:
>> 1) There exists some new-ish macros in overflow.h that perform
>> wrapping arithmetic without triggering sanitizer splats -- check out
>> the wrapping_* suite of macros.
>
> do they work for atomic? I suppose we also need to have them added to
> this_cpu
Hello Justin,
On Wed, Aug 14, 2024 at 02:05:49PM -0700, Justin Stitt wrote:
> > I am seeing some signed-integer-overflow in percpu reference counters.
>
> it is brave of you to enable this sanitizer :>)
UBSAN has been somehow useful to pick some problems, so, I try to invest
some time understand
On Wed, Aug 14, 2024 at 02:05:49PM -0700, Justin Stitt wrote:
> Hi,
>
> On Wed, Aug 14, 2024 at 10:10 AM Breno Leitao wrote:
> >
> > Hello,
> >
> > I am seeing some signed-integer-overflow in percpu reference counters.
>
> it is brave of you to enable this sanitizer :>)
>
> >
> > UBSAN:
Hi,
On Wed, Aug 14, 2024 at 10:10 AM Breno Leitao wrote:
>
> Hello,
>
> I am seeing some signed-integer-overflow in percpu reference counters.
it is brave of you to enable this sanitizer :>)
>
> UBSAN: signed-integer-overflow in
> ./arch/arm64/include/asm/atomic_lse.h:204:1
> -
Hello,
I am seeing some signed-integer-overflow in percpu reference counters.
UBSAN: signed-integer-overflow in
./arch/arm64/include/asm/atomic_lse.h:204:1
-9223372036854775808 - 1 cannot be represented in type 's64' (aka 'long
long')
Call trace:
handle_overflo
