building syzkaller on d6526ea3e6ad9081c902859bbb80f9f840377cb4...
fetching kernel...
checked out kernel commit d58772d8520c7ef247c4b95c9bd76d3a25da9ff5 ("Merge tag 'regmap-fix-v7.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap", 2026-08-10 09:15:27 -0700 -0700)
cleaning kernel...
building kernel...
kernel built successfully with compiler Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
testing patch...
reproduced crash: WARNING: locking bug in kvm_xen_set_evtchn_fast