On 6/5/2020 10:05 PM, Peter Zijlstra wrote:
On Fri, Jun 05, 2020 at 06:17:51AM -0700, Eric Dumazet wrote:
On Fri, Jun 5, 2020 at 1:10 AM kernel test robot <rong.a.c...@intel.com> wrote:
There you go.
We decided this was a bogus report, and that UBSAN requires sane compilers.
Please read the fine comment that was added in this commit and update
your compiler or do not mess with compiler flags.
+ /* If UBSAN reports an error there, please make sure your compiler
+ * supports -fno-strict-overflow before reporting it that was a bug
+ * in UBSAN, and it has been fixed in GCC-8.
+ */
+ return atomic_add_return(segs + delta, p_id) - segs;
make HOSTCC=gcc-4.9 CC=gcc-4.9 ARCH=i386 olddefconfig prepare
modules_prepare bzImage
Rong, can you make sure to exclude gcc<8 for UBSAN reports ?
Got it, thank's for your warning.
Best Regards,
Rong Chen
