31-Aug-2026 19:56:24: building syzkaller on 124ec9cc22064a93e87c29fb9f4fd7dc51f98195... 31-Aug-2026 19:56:40: fetching kernel... 31-Aug-2026 19:56:43: checked out kernel commit 54850912d011fff547909dc2d0685c29c546c685 ("Revert \"virtio-mmio: fix device release warning on module unload\"", 2026-08-26 16:10:43 +0000 UTC) 31-Aug-2026 19:56:43: cleaning kernel... 31-Aug-2026 19:56:43: building kernel... 31-Aug-2026 19:59:43: kernel built successfully with compiler Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 31-Aug-2026 19:59:43: testing patch... 31-Aug-2026 20:08:52: reproduced crash: KASAN: null-ptr-deref Write in f2fs_stop_gc_thread