14-Sep-2026 16:19:36: building syzkaller on 6b8752f20c06eee857545047ab920e63322bf4c8...
14-Sep-2026 16:19:58: fetching kernel...
14-Sep-2026 16:20:00: 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 16:20:00: cleaning kernel...
14-Sep-2026 16:20:01: building kernel...
14-Sep-2026 16:22:58: 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 16:22:58: testing patch...
14-Sep-2026 16:26:19: reproduced crash: UBSAN: shift-out-of-bounds in ext4_fill_super