uvm_fault(0xffffffff838985e8, 0xffff8000231f2004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x623: movzwl 0x4(%r15,%r14,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND *285203 43417 0 0x2 0 1K syz-executor.4 92256 81234 0 0x2 0x4000001 0 syz-execprog ufs_lookup() at ufs_lookup+0x623 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd806b0d05e8,ffff80002a44de58,ffff80002a44de88) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a44de28) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80002a44de28) at namei+0x7ca sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a290d20,ffffff9c,7087821244b0,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 syscall(ffff80002a44e000) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a44e000) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7087821244a0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xffffffff838985e8, 0xffff8000231f2004, 0, 1) -> d ddb{1}> trace ufs_lookup() at ufs_lookup+0x623 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd806b0d05e8,ffff80002a44de58,ffff80002a44de88) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a44de28) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80002a44de28) at namei+0x7ca sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a290d20,ffffff9c,7087821244b0,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 syscall(ffff80002a44e000) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a44e000) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7087821244a0, count: -7 ddb{1}> show registers rdi 0 rsi 0x2 rbp 0xffff80002a44dc60 rbx 0 rdx 0xfffffd8069acc700 rcx 0xffffffff rax 0xffffffff r8 0xffffffffffffffff r9 0xfffffd80097fb478 r10 0x62b1405aaa13cc1e r11 0x6a1b4959a9d65b2d r12 0xfffffd807810e118 r13 0 r14 0 r15 0xffff8000231f2000 rip 0xffffffff816b8933 ufs_lookup+0x623 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a44db70 ss 0x10 ufs_lookup+0x623: movzwl 0x4(%r15,%r14,1),%ebx ddb{1}> show proc PROC (syz-executor.4) tid=285203 pid=43417 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a290028,0xffff8000fffeafd8 process=0xffff8000fffedd00 user=0xffff80002a449000, vmspace=0xfffffd807d4373f0 estcpu=36, cpticks=126, pctcpu=0.57, user=4, sys=119, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18579 290783 74669 0 2 0 syz-executor.0 22613 445266 44706 0 2 0 syz-executor.2 58514 49998 31997 0 2 0 syz-executor.5 58514 257304 31997 0 2 0x4000000 syz-executor.5 50973 3236 56956 0 2 0 syz-executor.6 50973 125702 56956 0 3 0x4000080 fsleep syz-executor.6 41711 455793 84946 0 2 0 syz-executor.7 *43417 285203 81234 0 7 0x2 syz-executor.4 31997 41245 81234 0 3 0x82 nanoslp syz-executor.5 56956 220063 81234 0 3 0x82 nanoslp syz-executor.6 44706 150096 81234 0 3 0x82 nanoslp syz-executor.2 11266 360272 81234 0 3 0x10000082 nanoslp syz-executor.3 84946 422795 81234 0 2 0xc82 syz-executor.7 3284 331723 81234 0 3 0x10000082 nanoslp syz-executor.1 74669 255652 81234 0 2 0x2 syz-executor.0 81234 72094 56092 0 3 0x82 wait syz-execprog 81234 122792 56092 0 2 0x4000c82 syz-execprog 81234 299240 56092 0 3 0x4000082 wait syz-execprog 81234 505463 56092 0 3 0x4000082 thrsleep syz-execprog 81234 426234 56092 0 3 0x4000082 thrsleep syz-execprog 81234 295377 56092 0 3 0x4000082 thrsleep syz-execprog 81234 190499 56092 0 3 0x4000082 wait syz-execprog 81234 268866 56092 0 3 0x4000082 wait syz-execprog 81234 426912 56092 0 3 0x4000082 wait syz-execprog 81234 242253 56092 0 3 0x4000082 wait syz-execprog 81234 435832 56092 0 3 0x4000082 wait syz-execprog 81234 502616 56092 0 3 0x4000082 thrsleep syz-execprog 81234 249188 56092 0 3 0x4000082 wait syz-execprog 81234 507765 56092 0 3 0x4000082 thrsleep syz-execprog 81234 92256 56092 0 7 0x4000003 syz-execprog 81234 134636 56092 0 2 0x4000082 syz-execprog 56092 380870 60078 0 3 0x10008a sigsusp ksh 60078 254433 27068 0 3 0x98 kqread sshd-session 27068 444046 78810 0 3 0x92 kqread sshd-session 41157 432257 1 0 3 0x100083 ttyin getty 78810 21451 1 0 3 0x88 kqread sshd 91199 9711 99903 74 3 0x1100092 bpf pflogd 99903 315745 1 0 3 0x80 sbwait pflogd 27941 391929 78986 73 3 0x1100090 kqread syslogd 78986 340384 1 0 3 0x100082 sbwait syslogd 10358 206789 1 0 3 0x100080 kqread resolvd 92060 292860 47824 77 3 0x100092 kqread dhcpleased 94663 516441 47824 77 3 0x100092 kqread dhcpleased 47824 59255 1 0 3 0x80 kqread dhcpleased 24153 271529 0 0 3 0x14200 bored smr 61146 476384 0 0 2 0x14200 zerothread 10907 60618 0 0 3 0x14200 aiodoned aiodoned 40737 514464 0 0 3 0x14200 syncer update 10197 411296 0 0 3 0x14200 cleaner cleaner 40542 300947 0 0 3 0x14200 reaper reaper 90193 168410 0 0 3 0x14200 pgdaemon pagedaemon 96168 417895 0 0 3 0x14200 bored viomb 2407 378340 0 0 3 0x40014200 acpi0 acpi0 12196 32145 0 0 3 0x40014200 idle1 81348 213098 0 0 3 0x14200 bored softnet1 57205 257830 0 0 3 0x14200 bored softnet0 34842 92639 0 0 3 0x14200 bored systqmp 67711 465094 0 0 3 0x14200 bored systq 40872 262930 0 0 3 0x14200 tmoslp softclockmp 33885 127891 0 0 3 0x40014200 tmoslp softclock 32628 318210 0 0 3 0x40014200 idle0 1 442249 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 43417 (syz-executor.4) thread 0xffff80002a290d20 (285203) exclusive rrwlock inode r = 0 (0xfffffd806ae13460) #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+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839313a8) #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:765 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10187 11022K 11022K 166960K 11282 0 pcb 17 12K 12K 166960K 17 0 rtable 237 6K 7K 166960K 381 0 pf 34 17K 18K 166960K 48 0 ifaddr 43 7K 7K 166960K 49 0 ifgroup 55 2K 2K 166960K 60 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 36K 166960K 70 0 ioctlops 0 0K 4K 166960K 1484 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1265 80K 80K 166960K 1289 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1732 201K 291K 166960K 11958 0 file desc 15 53K 85K 166960K 4101 0 proc 69 115K 163K 166960K 555 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 99 7K 7K 166960K 110 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 445 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 265 163K 215K 166960K 33879 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 41 82K 112K 166960K 5551 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 12 0K 2K 166960K 31 0 temp 2 8644K 8708K 166960K 50938 0 kqueue 13 20K 20K 166960K 46 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 35 0 32 1 0 1 1 0 8 0 rtentry 176 122 0 12 6 1 5 5 0 8 0 unpcb 144 69 0 52 1 0 1 1 0 8 0 syncache 336 9 0 9 2 2 0 1 0 8 0 tcpcb 736 12 0 9 1 0 1 1 0 8 0 arp 136 20 0 2 1 0 1 1 0 8 0 inpcb 328 73 0 67 1 0 1 1 0 8 0 nd6 152 27 0 3 2 1 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 33 0 22 1 0 1 1 0 8 0 pfstkey 128 33 0 22 1 0 1 1 0 8 0 pfstate 384 33 0 22 3 0 3 3 0 8 1 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 499 0 48 32 3 29 29 0 8 0 art_table 40 500 0 48 6 1 5 5 0 8 0 art_node 32 122 0 22 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 9527 0 6430 195 1 194 194 0 8 0 ffsino 296 9527 0 6430 239 0 239 239 0 8 0 nchpl 144 17713 0 15922 68 1 67 67 0 8 0 vnodes 216 6130 0 0 341 0 341 341 0 8 0 namei 1024 43013 0 43012 5 4 1 3 0 8 0 percpumem 16 50 0 1 1 0 1 1 0 8 0 kstatmem 264 28 0 2 2 0 2 2 0 8 0 scxspl 216 47531 0 47531 10 9 1 8 1 8 1 plimitpl 152 59 0 42 1 0 1 1 0 8 0 sigapl 424 4471 0 4424 9 3 6 7 0 8 0 knotepl 120 109 0 0 4 0 4 4 0 8 0 kqueuepl 224 42 0 33 1 0 1 1 0 8 0 pipepl 344 192 0 164 5 2 3 3 0 8 0 fdescpl 528 4455 0 4426 4 1 3 3 0 8 0 filepl 160 14071 0 13932 8 1 7 7 0 8 1 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 35 0 18 1 0 1 1 0 8 0 pgrppl 48 35 0 18 1 0 1 1 0 8 0 ucredpl 104 153 0 139 1 0 1 1 0 8 0 zombiepl 144 4426 0 4424 2 1 1 1 0 8 0 processpl 1232 4471 0 4424 6 2 4 5 0 8 0 procpl 664 8499 0 8435 8 2 6 6 0 8 0 sockpl 752 177 0 151 3 0 3 3 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 155 0 0 18 0 18 18 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 181 0 0 10 0 10 10 0 8 0 bufpl 280 12750 0 6546 444 0 444 444 0 8 0 anonpl 32 9883 0 0 80 0 80 80 0 246 0 amapchunkpl 152 112900 0 112320 41 13 28 30 0 158 3 amappl16 200 8381 0 8289 9 3 6 6 0 8 1 amappl15 192 16 0 16 2 2 0 1 0 8 0 amappl14 184 23 0 20 2 1 1 1 0 8 0 amappl13 176 520 0 517 1 0 1 1 0 8 0 amappl12 168 4965 0 4925 5 3 2 3 0 8 0 amappl11 160 11 0 11 2 2 0 1 0 8 0 amappl10 152 131 0 106 3 2 1 2 0 8 0 amappl9 144 970 0 970 2 2 0 1 0 8 0 amappl8 136 255 0 212 3 1 2 2 0 8 0 amappl7 128 183 0 176 2 1 1 2 0 8 0 amappl6 120 458 0 439 3 2 1 2 0 8 0 amappl5 112 172 0 162 1 0 1 1 0 8 0 amappl4 104 694 0 662 3 1 2 2 0 8 0 amappl3 96 26012 0 25928 5 2 3 3 0 8 0 amappl2 88 1057 0 992 7 5 2 5 0 8 0 amappl1 80 33762 0 33164 35 20 15 24 0 8 0 amappl 88 32640 0 32480 8 3 5 5 0 92 0 uvmvnodes 80 6130 0 0 126 0 126 126 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 4455 0 4426 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4455 0 4426 1 0 1 1 0 8 0 vmmpekpl 168 29400 0 29363 2 0 2 2 0 8 0 vmmpepl 168 237424 0 235528 135 36 99 129 0 357 14 vmsppl 488 4454 0 4426 6 2 4 5 0 8 0 rwobjpl 80 69084 0 61916 165 18 147 147 0 8 0 pdppl 4096 8917 0 8852 147 76 71 83 0 8 6 pvpl 32 54982 0 0 444 0 444 444 0 265 0 pmappl 256 4454 0 4426 3 1 2 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 424 0 89 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83839ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff839311a0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839311a0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff839311a0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839311a0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 ktrsysret(ffff8000fffea800,48,0,ffff80002a4722a0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000fffea800,48,0,ffff80002a4722a0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a472350) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a472350) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:786 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x26d5385e0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff83839ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff839311a0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839311a0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff839311a0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839311a0) at __mp_lock+0x192 sys/kern/kern_lock.c:165 ktrsysret(ffff8000fffea800,48,0,ffff80002a4722a0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000fffea800,48,0,ffff80002a4722a0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a472350) at syscall+0xa50 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a472350) at syscall+0xa50 sys/arch/amd64/amd64/trap.c:786 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x26d5385e0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at ufs_lookup+0x623: movzwl 0x4(%r15,%r14,1),%ebx ufs_lookup() at ufs_lookup+0x623 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd806b0d05e8,ffff80002a44de58,ffff80002a44de88) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a44de28) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80002a44de28) at namei+0x7ca sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a290d20,ffffff9c,7087821244b0,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 syscall(ffff80002a44e000) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a44e000) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7087821244a0, count: 8 ddb{1}> trace ufs_lookup() at ufs_lookup+0x623 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd806b0d05e8,ffff80002a44de58,ffff80002a44de88) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a44de28) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80002a44de28) at namei+0x7ca sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a290d20,ffffff9c,7087821244b0,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 syscall(ffff80002a44e000) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a44e000) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7087821244a0, count: -7