uvm_fault(0xfffff1800b1f73d0, 0xee40, 0, 1) -> e kernel: page fault trap, code=0 Stopped at device_lookup+0x7b: movl 0x40(%rax),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND * 4732 1301 0 0x2 0 0K syz-executor device_lookup(ffffffff83902ad0,0) at device_lookup+0x7b sys/kern/subr_autoconf.c:954 disk_lookup(ffffffff83902ad0,0) at disk_lookup+0x3b sys/kern/subr_disk.c:-1 sdstrategy(fffff1806d145bb8) at sdstrategy+0x53 sys/scsi/sd.c:530 spec_strategy(ffff80002a35e818) at spec_strategy+0x42 sys/kern/spec_vnops.c:448 VOP_STRATEGY(fffff1800b209510,fffff1806d145bb8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636 ufs_strategy(ffff80002a35e8b8) at ufs_strategy+0x1f0 sys/ufs/ufs/ufs_vnops.c:-1 VOP_STRATEGY(fffff1806d8b0a60,fffff1806d145bb8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636 bwrite(fffff1806d145bb8) at bwrite+0x30a sys/kern/vfs_bio.c:616 ufs_dirremove(fffff1806d8b0a60,fffff1806c0dde18,800c,1) at ufs_dirremove+0x290 sys/ufs/ufs/ufs_lookup.c:919 ufs_rmdir(ffff80002a35ea20) at ufs_rmdir+0x238 sys/ufs/ufs/ufs_vnops.c:1248 VOP_RMDIR(fffff1806d8b0a60,fffff1807b080398,ffff80002a35eaf8) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413 dounlinkat(ffff800045fef240,ffffff9c,7395cf129560,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1840 syscall(ffff80002a35ec70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a35ec70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7395cf129550, count: 1 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffff1800b1f73d0, 0xee40, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace device_lookup(ffffffff83902ad0,0) at device_lookup+0x7b sys/kern/subr_autoconf.c:954 disk_lookup(ffffffff83902ad0,0) at disk_lookup+0x3b sys/kern/subr_disk.c:-1 sdstrategy(fffff1806d145bb8) at sdstrategy+0x53 sys/scsi/sd.c:530 spec_strategy(ffff80002a35e818) at spec_strategy+0x42 sys/kern/spec_vnops.c:448 VOP_STRATEGY(fffff1800b209510,fffff1806d145bb8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636 ufs_strategy(ffff80002a35e8b8) at ufs_strategy+0x1f0 sys/ufs/ufs/ufs_vnops.c:-1 VOP_STRATEGY(fffff1806d8b0a60,fffff1806d145bb8) at VOP_STRATEGY+0x65 sys/kern/vfs_vops.c:636 bwrite(fffff1806d145bb8) at bwrite+0x30a sys/kern/vfs_bio.c:616 ufs_dirremove(fffff1806d8b0a60,fffff1806c0dde18,800c,1) at ufs_dirremove+0x290 sys/ufs/ufs/ufs_lookup.c:919 ufs_rmdir(ffff80002a35ea20) at ufs_rmdir+0x238 sys/ufs/ufs/ufs_vnops.c:1248 VOP_RMDIR(fffff1806d8b0a60,fffff1807b080398,ffff80002a35eaf8) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413 dounlinkat(ffff800045fef240,ffffff9c,7395cf129560,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1840 syscall(ffff80002a35ec70) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a35ec70) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7395cf129550, count: -14 ddb{0}> show registers rdi 0x2 rsi 0 rbp 0xffff80002a35e750 rbx 0xfffff1806d28da80 rdx 0 rcx 0 rax 0xee00 __ALIGN_SIZE+0xde00 r8 0xffffffffffffffff r9 0x1 r10 0x2c3da5091bba3ce6 r11 0x57944786d186973b r12 0x2 r13 0 r14 0xee00 __ALIGN_SIZE+0xde00 r15 0xffffffff83902ad0 sd_cd rip 0xffffffff817d5d6b device_lookup+0x7b cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002a35e720 ss 0x10 device_lookup+0x7b: movl 0x40(%rax),%r15d ddb{0}> show proc PROC (syz-executor) tid=4732 pid=1301 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045fef770,0xffff800038f9c560 process=0xffff800045ff5348 user=0xffff80002a359000, vmspace=0xfffff1800b1f73d0 estcpu=36, cpticks=16, pctcpu=0.2, user=0, sys=16, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 43416 171294 37252 0 2 0x100000 0 sh 37252 322831 72777 0 3 0x100002 0x88 sigsusp sh 98597 44665 66394 0 2 0 0 syz-executor 98597 262084 66394 0 3 0 0x4000080 pipewr syz-executor 98597 300464 66394 0 3 0 0x4000080 pipewr syz-executor 54830 333912 0 0 3 0x14000 0x280 nfsidl nfsio 21576 471465 0 0 3 0x14000 0x280 nfsidl nfsio 32565 484840 0 0 3 0x14000 0x280 nfsidl nfsio 88522 336188 0 0 3 0x14000 0x280 nfsidl nfsio 52306 416608 0 0 3 0x14000 0x280 nfsidl nfsio 84804 396155 0 0 3 0x14000 0x280 nfsidl nfsio 8359 469576 0 0 3 0x14000 0x280 nfsidl nfsio 4669 345509 0 0 3 0x14000 0x280 nfsidl nfsio 12541 349458 0 0 3 0x14000 0x280 nfsidl nfsio 50295 327677 0 0 3 0x14000 0x280 nfsidl nfsio 21812 136187 0 0 3 0x14000 0x280 nfsidl nfsio 76358 520673 0 0 3 0x14000 0x280 nfsidl nfsio 59538 331505 0 0 3 0x14000 0x280 nfsidl nfsio 89930 174177 0 0 3 0x14000 0x280 nfsidl nfsio 52663 76528 0 0 3 0x14000 0x280 nfsidl nfsio 12555 102897 0 0 3 0x14000 0x280 nfsidl nfsio 71880 172466 0 0 3 0x14000 0x280 nfsidl nfsio 96619 200039 0 0 3 0x14000 0x280 nfsidl nfsio 20778 507212 0 0 3 0x14000 0x280 nfsidl nfsio 30064 204351 0 0 3 0x14000 0x280 nfsidl nfsio 72777 298515 56103 0 3 0x2 0x80 wait syz-executor 66394 188306 56103 0 3 0x2 0x80 nanoslp syz-executor 17115 157574 56103 0 3 0x2 0x80 piperd syz-executor 64631 51292 1 0 3 0x100003 0x80 ttyin getty * 1301 4732 56103 0 7 0x2 0 syz-executor 47537 154478 56103 0 3 0x2 0x80 piperd syz-executor 33256 3280 56103 0 3 0x2 0x80 piperd syz-executor 91098 156122 56103 0 3 0x2 0x80 wait syz-executor 56103 430182 1 0 2 0x2 0 syz-executor 16523 343936 0 0 3 0x14000 0x200 bored smr 51480 489606 0 0 2 0x14000 0x200 zerothread 93401 77567 0 0 3 0x14000 0x200 aiodoned aiodoned 85023 457445 0 0 3 0x14000 0x200 syncer update 16348 168136 0 0 3 0x14000 0x200 cleaner cleaner 39493 335076 0 0 3 0x14000 0x200 reaper reaper 44489 56609 0 0 3 0x14000 0x200 pgdaemon pagedaemon 11292 63092 0 0 3 0x14000 0x200 bored viomb 85061 355072 0 0 3 0x14000 0x40000200 acpi0 acpi0 36950 363104 0 0 7 0x14000 0x40000200 idle1 36407 244359 0 0 3 0x14000 0x200 bored softnet1 27823 231886 0 0 3 0x14000 0x200 bored softnet0 36781 73550 0 0 3 0x14000 0x200 bored systqmp 19144 213368 0 0 3 0x14000 0x200 bored systq 60238 268394 0 0 3 0x14000 0x200 tmoslp softclockmp 5798 238521 0 0 2 0x14000 0x40000200 softclock 77031 517134 0 0 3 0x14000 0x40000200 idle0 1 299446 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 1301 (syz-executor) thread 0xffff800045fef240 (4732) exclusive rrwlock inode r = 0 (0xfffff1806c0ddeb8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:692 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff1806d28db20) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83b22f00) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:791 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11049 12017K 12157K 166960K 12233 0 pcb 50 14K 14K 166960K 84 0 rtable 227 7K 8K 166960K 592 0 pf 37 18K 19K 166960K 70 0 ifaddr 40 6K 7K 166960K 78 0 ifgroup 55 2K 2K 166960K 91 0 sysctl 1 1K 9K 166960K 6 0 counters 70 37K 37K 166960K 94 0 ioctlops 0 0K 4K 166960K 1583 0 iov 0 0K 12K 166960K 8 0 mount 1 1K 1K 166960K 1 0 log 4 20K 20K 166960K 8 0 vnodes 1290 81K 81K 166960K 1514 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 13 0K 1K 166960K 17 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 13 49K 97K 166960K 370 0 sigio 0 0K 0K 166960K 3 0 proc 21 33K 147K 166960K 799 0 subproc 72 4K 4K 166960K 144 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 12 0 in_multi 88 5K 6K 166960K 178 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 574 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 104 82K 177K 166960K 4940 0 UVM aobj 9 2K 2K 166960K 9 0 pinsyscall 16 32K 108K 166960K 1755 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 16 0K 1K 166960K 52 0 temp 41 9119K 9158K 166960K 16532 0 kqueue 1 2K 26K 166960K 51 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 28 0 0 1 0 1 1 0 8 0 rtpcb 120 54 0 54 1 0 1 1 0 8 1 rtentry 176 190 0 90 6 0 6 6 0 8 0 unpcb 144 103 0 103 1 0 1 1 0 8 1 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 38 0 37 1 0 1 1 0 8 0 arp 136 32 0 16 1 0 1 1 0 8 0 inpcb 328 210 0 175 4 0 4 4 0 8 0 nd6 152 47 0 25 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 16 0 8 1 0 1 1 0 8 0 ppxss 1192 4 0 4 1 0 1 1 0 8 1 pfstscr 40 4 0 2 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 45 0 0 1 0 1 1 0 8 0 pfstkey 128 57 0 12 2 0 2 2 0 8 0 pfstate 448 49 0 6 5 0 5 5 0 8 0 pfrule 1360 22 0 15 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 779 0 365