14-Sep-2026 16:49:39: building syzkaller on e28266709dd2a1d1452d4a5bbf271700e10335c6...
14-Sep-2026 16:50:06: fetching kernel...
14-Sep-2026 16:50:08: checked out kernel commit 5bfe2b8c1439354d25dc5b1779cd0bb75bb90a7f ("Revert \"mmc: sdhci: make tuning_err a signed int\"", 2026-09-11 15:56:56 +0000 UTC)
14-Sep-2026 16:50:08: cleaning kernel...
14-Sep-2026 16:50:09: building kernel...
14-Sep-2026 16:53:07: kernel built successfully with compiler Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
14-Sep-2026 16:53:07: testing patch...
14-Sep-2026 16:56:54: reproduced crash: UBSAN: shift-out-of-bounds in ext4_fill_super