uvm_fault(0xffffffff83ac0930, 0xffff800019a02004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x613: movzwl 0x4(%r15,%r14,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND * 42695 23220 0 0x2 0 0 syz-executor ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffb006d5c9c08,ffff80002a88b3a8,ffff80002a88b3d8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a88b378) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a88b378) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a736538,ffffff9c,77e2a939dd60,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 syscall(ffff80002a88b540) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a88b540) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77e2a939dd50, count: 8 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff83ac0930, 0xffff800019a02004, 0, 1) -> d ddb> show kasan No such command ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffb006d5c9c08,ffff80002a88b3a8,ffff80002a88b3d8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a88b378) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a88b378) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a736538,ffffff9c,77e2a939dd60,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 syscall(ffff80002a88b540) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a88b540) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77e2a939dd50, count: -7 ddb> show registers rdi 0 rsi 0x2 rbp 0xffff80002a88b1b0 rbx 0 rdx 0 rcx 0xffffffff rax 0xffff80002a736538 r8 0xffffffffffffffff r9 0xfffffb0007ffd6e8 r10 0x88d2d630b71fd33b r11 0x159adca06b4a23e6 r12 0xfffffb006d3b5aa8 r13 0 r14 0 r15 0xffff800019a02000 rip 0xffffffff8166b3c3 ufs_lookup+0x613 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a88b0c0 ss 0x10 ufs_lookup+0x613: movzwl 0x4(%r15,%r14,1),%ebx ddb> show proc PROC (syz-executor) tid=42695 pid=23220 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a737760,0xffff80002a736a78 process=0xffff80002a79e890 user=0xffff80002a886000, vmspace=0xfffffb006fccd008 estcpu=36, cpticks=6, pctcpu=0.0, user=0, sys=5, intr=0 ddb> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 46734 426901 41139 0 2 0 0 syz-executor 46734 119648 41139 0 3 0 0x4000080 fsleep syz-executor 46734 105439 41139 0 3 0 0x4000080 fsleep syz-executor 75105 181669 88263 0 3 0x1000 0x4080000 smrbar syz-executor 75105 142565 88263 0 3 0x1000 0x4002000 suspend syz-executor 88263 292216 76805 0 2 0x2 0xc80 syz-executor 54859 389067 1 0 3 0 0x80 nanoslp init *23220 42695 76805 0 7 0x2 0 syz-executor 41139 377844 76805 0 2 0x2 0xc80 syz-executor 8109 167978 76805 0 3 0x2 0x80 wait syz-executor 76805 35914 1 0 3 0x2 0x80 wait syz-executor 58032 303922 0 0 3 0x14000 0x200 bored smr 58298 272196 0 0 2 0x14000 0x200 zerothread 46415 229895 0 0 3 0x14000 0x200 aiodoned aiodoned 94280 140493 0 0 3 0x14000 0x200 syncer update 46752 276758 0 0 3 0x14000 0x200 cleaner cleaner 87504 279840 0 0 3 0x14000 0x200 reaper reaper 64018 339288 0 0 3 0x14000 0x200 pgdaemon pagedaemon 84205 502538 0 0 3 0x14000 0x200 bored viomb 91943 41583 0 0 3 0x14000 0x40000200 acpi0 acpi0 9387 108405 0 0 3 0x14000 0x200 bored softnet0 66581 374836 0 0 3 0x14000 0x200 bored systqmp 78055 459530 0 0 3 0x14000 0x200 bored systq 74315 52120 0 0 3 0x14000 0x40000200 tmoslp softclock 10971 162961 0 0 3 0x14000 0x40000200 idle0 1 173923 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10010000 0x200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11023 12104K 12625K 166960K 12690 0 pcb 17 14K 16K 166960K 213 0 rtable 216 7K 8K 166960K 520 0 pf 34 14K 73K 166960K 90 0 ifaddr 36 6K 8K 166960K 60 0 ifgroup 44 1K 2K 166960K 90 0 sysctl 4 1K 9K 166960K 14 0 counters 32 17K 18K 166960K 43 0 ioctlops 0 0K 4K 166960K 186 0 iov 0 0K 16K 166960K 22 0 mount 1 1K 1K 166960K 1 0 log 2 0K 0K 166960K 6 0 vnodes 1329 84K 84K 166960K 1726 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 23 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 11 41K 109K 166960K 529 0 sigio 0 0K 0K 166960K 4 0 proc 11 17K 91K 166960K 559 0 subproc 63 3K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 43 0 in_multi 77 5K 6K 166960K 119 0 ether_multi 1 0K 0K 166960K 2 0 mrt 2 0K 0K 166960K 23 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 448 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 98 69K 164K 166960K 6291 0 UVM aobj 10 2K 2K 166960K 12 0 pinsyscall 13 26K 92K 166960K 1665 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 17 0 NDP 12 0K 2K 166960K 39 0 temp 36 9111K 9170K 166960K 22903 0 kqueue 2 4K 28K 166960K 94 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 97 0 97 2 1 1 2 0 8 1 rtentry 136 133 0 40 5 0 5 5 0 8 0 unpcb 144 195 0 195 1 0 1 1 0 8 1 syncache 336 12 0 12 2 1 1 1 0 8 1 tcpqe 32 9 0 9 1 0 1 1 0 8 1 tcpcb 736 171 0 166 7 0 7 7 0 8 6 arp 96 21 0 6 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 0 1 0 1 1 0 8 0 inpcb 328 635 0 630 11 5 6 7 0 8 5 ip6q 72 4 0 3 2 1 1 1 0 8 0 ip6af 40 9 0 8 2 1 1 1 0 8 0 nd6 112 30 0 12 1 0 1 1 0 8 0 pkpcb 40 7 0 7 2 1 1 1 0 8 1 kcovpl 48 9 0 2 1 0 1 1 0 8 0 ppxss 1072 4 0 3 1 0 1 1 0 8 0 pfstscr 40 72 0 68 1 0 1 1 0 8 0 pfrktable 1344 3 0 3 1 1 0 1 0 8 0 pfanchor 1288 5 0 2 2 1 1 1 0 8 0 pfstitem 24 6 0 0 1 0 1 1 0 8 0 pfstkey 128 74 0 68 1 0 1 1 0 8 0 pfstate 384 37 0 34 1 0 1 1 0 8 0 pfrule 1360 3 0 2 2 1 1 1 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 553 0 151 32 0 32 32 0 8 5 art_table 40 555 0 151 6 0 6 6 0 8 0 art_node 32 131 0 47 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semapl 72 20 0 10 1 0 1 1 0 8 0 shmpl 112 9 0 2 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2248 0 792 92 0 92 92 0 8 0 ffsino 256 2248 0 792 92 0 92 92 0 8 0 nchpl 144 2992 0 1296 64 0 64 64 0 8 0 vnodes 216 2567 0 0 143 0 143 143 0 8 0 namei 1024 9652 0 9651 2 1 1 2 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 43 0 22 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 16666 0 16666 4 2 2 3 1 8 2 plimitpl 152 100 0 90 1 0 1 1 0 8 0 sigapl 424 821 0 793 6 1 5 6 0 8 0 knotepl 120 17640 0 17618 17 7 10 10 0 8 8 kqueuepl 184 117 0 115 1 0 1 1 0 8 0 pipepl 304 141 0 114 3 0 3 3 0 8 0 fdescpl 448 807 0 793 5 1 4 5 0 8 0 filepl 120 4094 0 3950 12 3 9 10 0 8 1 lockfpl 104 170 0 169 1 0 1 1 0 8 0 lockfspl 48 64 0 63 1 0 1 1 0 8 0 sessionpl 144 41 0 39 1 0 1 1 0 8 0 pgrppl 48 56 0 46 1 0 1 1 0 8 0 ucredpl 104 484 0 481 1 0 1 1 0 8 0 zombiepl 144 798 0 793 2 1 1 1 0 8 0 processpl 1152 821 0 793 4 0 4 4 0 8 0 procpl 664 1410 0 1378 5 0 5 5 0 8 0 sosppl 176 34 0 34 2 1 1 1 0 8 1 sockpl 552 946 0 941 12 7 5 10 0 8 4 mcl64k 65536 41 0 40 2 1 1 1 0 8 0 mcl16k 16384 6 0 6 1 1 0 1 0 8 0 mcl8k 8192 14 0 14 2 1 1 1 0 8 1 mcl4k 4096 3037 0 2987 14 6 8 13 0 8 1 mcl2k 2048 405 0 404 3 0 3 3 0 8 2 mextrefs 64 243 0 243 1 0 1 1 0 8 1 mtagpl 96 9 0 8 1 0 1 1 0 8 0 mbufpl 256 8316 0 8209 18 0 18 18 0 8 4 bufpl 272 6812 0 596 415 0 415 415 0 8 0 anonpl 24 126230 0 125025 54 9 45 45 0 187 20 amapchunkpl 152 19450 0 19190 31 10 21 30 0 158 4 amappl16 200 2308 0 2292 15 1 14 15 0 8 8 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 439 0 439 1 0 1 1 0 8 1 amappl13 176 146 0 146 1 0 1 1 0 8 1 amappl12 168 1048 0 1036 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 59 0 59 1 0 1 1 0 8 1 amappl9 144 269 0 269 1 1 0 1 0 8 0 amappl8 136 96 0 96 1 0 1 1 0 8 1 amappl7 128 147 0 145 1 0 1 1 0 8 0 amappl6 120 162 0 161 1 0 1 1 0 8 0 amappl5 112 94 0 93 1 0 1 1 0 8 0 amappl4 104 290 0 287 1 0 1 1 0 8 0 amappl3 96 3922 0 3866 3 0 3 3 0 8 0 amappl2 88 539 0 530 2 0 2 2 0 8 0 amappl1 80 11849 0 11774 13 1 12 13 0 8 8 amappl 88 5499 0 5410 4 0 4 4 0 92 0 uvmvnodes 80 106 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 11 0 2 1 0 1 1 0 8 0 uaddrrnd 24 807 0 793 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 807 0 793 1 0 1 1 0 8 0 vmmpekpl 168 8155 0 8107 3 0 3 3 0 8 0 vmmpepl 168 58811 0 58242 92 1 91 91 0 357 50 vmsppl 368 806 0 793 4 1 3 4 0 8 0 rwobjpl 40 18614 0 18263 13 0 13 13 0 8 0 pdppl 4096 1620 0 1586 98 50 48 78 0 8 14 pvpl 32 362175 0 359327 125 16 109 111 0 265 58 pmappl 216 806 0 793 2 0 2 2 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 799 0 66 21 0 21 21 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffb006d5c9c08,ffff80002a88b3a8,ffff80002a88b3d8) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a88b378) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a88b378) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a736538,ffffff9c,77e2a939dd60,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 syscall(ffff80002a88b540) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a88b540) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77e2a939dd50, count: -7 ddb>