18-Sep-2026 10:19:41: building syzkaller on d34966d146f584d390b49f213d1fccd59548dc6d... 18-Sep-2026 10:20:19: fetching kernel... 18-Sep-2026 10:20:21: checked out kernel commit 5bfe2b8c1439354d25dc5b1779cd0bb75bb90a7f ("Revert \"mmc: sdhci: make tuning_err a signed int\"", 2026-09-11 15:56:56 +0000 UTC) 18-Sep-2026 10:20:21: cleaning kernel... 18-Sep-2026 10:20:22: building kernel... 18-Sep-2026 10:23:12: kernel built successfully with compiler Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 18-Sep-2026 10:23:12: testing patch... 18-Sep-2026 10:29:38: reproduced crash: KASAN: use-after-free Read in do_split