panic: Assertion ip->i_mode != 0 failed at /syzkaller/managers/main/kernel/sys/ufs/ffs/ffs_softdep.c:10021 cpuid = 1 time = 7 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0056c527d0 kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056c52930 vpanic() at vpanic+0x257/frame 0xfffffe0056c52af0 panic() at panic+0xb5/frame 0xfffffe0056c52bb0 handle_workitem_remove() at handle_workitem_remove+0xd03/frame 0xfffffe0056c52cf0 process_worklist_item() at process_worklist_item+0x525/frame 0xfffffe0056c52e40 softdep_process_worklist() at softdep_process_worklist+0xfd/frame 0xfffffe0056c52e90 softdep_flush() at softdep_flush+0x1a4/frame 0xfffffe0056c52ef0 fork_exit() at fork_exit+0xcc/frame 0xfffffe0056c52f30 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0056c52f30 --- trap 0, rip = 0, rsp = 0, rbp = 0 --- KDB: enter: panic [ thread pid 14 tid 100093 ] Stopped at kdb_enter+0x6e: movq $0,0x25c45c7(%rip) db> db> set $lines = 0 db> set $maxwidth = 0 db> show registers cs 0x20 ds 0x3b es 0x3b fs 0x13 gs 0x1b ss 0x28 rax 0x12 rcx 0xfffffe0002bf1850 rdx 0 rbx 0xffffffff827cb4c0 .str.27 rsp 0xfffffe0056c52910 rbp 0xfffffe0056c52930 rsi 0 rdi 0xffffffff81614a99 printf+0x149 r8 0 r9 0xffffffff r10 0x5000000000fe5 r11 0x9 r12 0xfffffe00540bb000 r13 0xfffffffffffffffd r14 0xffffffff827cb4c0 .str.27 r15 0 rip 0xffffffff815fe5ce kdb_enter+0x6e rflags 0x46 kdb_enter+0x6e: movq $0,0x25c45c7(%rip) db> show proc Process 14 (bufdaemon) at 0xfffffe00540055c0: state: NORMAL uid: 0 gids: 0 parent: pid 0 at 0xffffffff83b4d060 ABI: null flag: 0x10000284 flag2: 0 reaper: 0xffffffff83b4d060 reapsubtree: 14 sigparent: 20 vmspace: 0xffffffff83b4e040 (map 0xffffffff83b4e040) (map.pmap 0xffffffff83b4e0e0) (pmap 0xffffffff83b4e150) threads: 3 100079 D psleep 0xffffffff83cbfd60 [bufdaemon] 100082 D - 0xffffffff83001ec0 [bufspacedaemon-0] 100093 Run CPU 1 [/ worker] db>