https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111736
Bug ID: 111736
Summary: Address sanitizer is not compatible with named address
spaces
Product: gcc
Version: 12.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: ubizjak at gmail dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at
gcc dot gnu.org
Target Milestone: ---
>From [1], gcc is doing a KASAN check on a percpu address (when percpu access is
implemented using named address spaces). This is not a "real" address, just an
offset from the segment register.
The testcase
--cut here--
int __seg_gs m;
int foo (void)
{
return m;
}
--cut here--
does not show any special handling that would handle segment registers.
[1]
https://lore.kernel.org/lkml/CAHk-=wi6u-o1wdpoesuce6qo2oapu0hezaig0udou4l5cre...@mail.gmail.com/
