13-Oct-2026 09:40:43: building syzkaller on 4e8b1cc684b6a13aa7e5ae999c1ddfc8a900f2ba... 13-Oct-2026 09:41:05: fetching kernel... 13-Oct-2026 09:41:08: checked out kernel commit a051a4bf909f76f470ccb3761ee0cf6e2395616e ("Linux 5.15.222", 2026-10-03 12:26:49 +0200 +0200) 13-Oct-2026 09:41:08: cleaning kernel... 13-Oct-2026 09:41:08: building kernel... 13-Oct-2026 09:47:28: kernel built successfully with compiler Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 13-Oct-2026 09:47:28: testing patch... 13-Oct-2026 09:54:05: reproduced crash: WARNING in ext4_iomap_begin