panic: vop_generic_badop Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 431699 58338 32767 0x8000010 0 0 syz-executor.1 *160949 48961 32767 0x8000010 0 1 syz-executor.4 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8288f7a8) at panic+0x17b sys/kern/subr_prf.c:198 vop_generic_badop(ffff80002d0e6018) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd80613dcce0,fffffd8065a6c250) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd8065a6c250) at bwrite+0x1d3 sys/kern/vfs_bio.c:757 VOP_BWRITE(fffffd8065a6c250) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002d0e6290) at ufs_mkdir+0x445 sys/ufs/ufs/ufs_vnops.c:1165 VOP_MKDIR(fffffd806b678dd0,ffff80002d0e63f0,ffff80002d0e6420,ffff80002d0e6320) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff8000ffff7498,ffffff9c,7bc7169a1460,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3077 syscall(ffff80002d0e65a0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002d0e65a0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bc7169a14d0, count: 4 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 cpu0: kernel diagnostic assertion "((flags & PGO_LOCKED) != 0 && rw_lock_held(uobj->vmobjlock)) || (flags & PGO_LOCKED) == 0" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_vnode.c", line 953 *cpu1: vop_generic_badop ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8288f7a8) at panic+0x17b sys/kern/subr_prf.c:198 vop_generic_badop(ffff80002d0e6018) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd80613dcce0,fffffd8065a6c250) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd8065a6c250) at bwrite+0x1d3 sys/kern/vfs_bio.c:757 VOP_BWRITE(fffffd8065a6c250) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002d0e6290) at ufs_mkdir+0x445 sys/ufs/ufs/ufs_vnops.c:1165 VOP_MKDIR(fffffd806b678dd0,ffff80002d0e63f0,ffff80002d0e6420,ffff80002d0e6320) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff8000ffff7498,ffffff9c,7bc7169a1460,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3077 syscall(ffff80002d0e65a0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002d0e65a0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bc7169a14d0, count: -11 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002d0e5f40 rbx 0xffff800029cecd77 rdx 0 rcx 0xffff8000ffff7498 rax 0xffff800029cebff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x968ed1eb90a0c996 r11 0xf36ee5d7702fa7fa r12 0xffff800029cecb78 r13 0 r14 0 r15 0x1 rip 0xffffffff823cf56c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002d0e5f30 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.4) tid=160949 pid=48961 tcnt=1 stat=onproc flags process=8000010 proc=0 runpri=17, usrpri=80, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff8000ffff6538,0xffff8000ffff62b8 process=0xffff8000fffec490 user=0xffff80002d0e1000, vmspace=0xfffffd8050c5b008 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 2376 461632 82213 32767 2 0x8000010 syz-executor.3 2376 136316 82213 32767 3 0xc000090 fsleep syz-executor.3 66944 141025 24066 32767 2 0x8000010 syz-executor.6 66944 338671 24066 32767 3 0xc000090 piperd syz-executor.6 58338 431699 97754 32767 7 0x8000010 syz-executor.1 58338 70053 97754 32767 3 0xc000090 fsleep syz-executor.1 8201 16650 53639 32767 2 0x8000010 syz-executor.7 8201 239838 53639 32767 3 0xc000090 sbwait syz-executor.7 15840 495883 50343 32767 3 0x8000090 nanoslp syz-executor.5 15840 277494 50343 32767 3 0xc000090 sbwait syz-executor.5 15840 68495 50343 32767 3 0xc000090 fsleep syz-executor.5 85478 25870 72773 32767 3 0x8000090 nanoslp syz-executor.0 85478 357670 72773 32767 3 0xc000090 kqread syz-executor.0 85478 45516 72773 32767 3 0xc000090 kqread syz-executor.0 85478 68998 72773 32767 3 0xc000090 fsleep syz-executor.0 82213 325505 97024 32767 3 0x8000090 nanoslp syz-executor.3 97024 470312 76588 0 3 0x8000082 wait syz-executor.3 50343 7204 70312 32767 3 0x8000090 nanoslp syz-executor.5 70312 103214 76588 0 3 0x8000082 wait syz-executor.5 24066 316922 69778 32767 3 0x8000090 nanoslp syz-executor.6 69778 456166 76588 0 3 0x8000082 wait syz-executor.6 31749 468126 220 32767 2 0x8000010 syz-executor.2 220 306590 76588 0 3 0x8000082 wait syz-executor.2 53639 339831 43415 32767 3 0x8000090 nanoslp syz-executor.7 43415 180032 76588 0 3 0x8000082 wait syz-executor.7 97754 280713 6117 32767 3 0x8000090 nanoslp syz-executor.1 6117 26052 76588 0 3 0x8000082 wait syz-executor.1 72773 343913 10075 32767 3 0x8000090 nanoslp syz-executor.0 10075 472612 76588 0 3 0x8000082 wait syz-executor.0 *48961 160949 90018 32767 7 0x8000010 syz-executor.4 90018 217439 76588 0 3 0x8000082 wait syz-executor.4 5530 521266 0 0 3 0x14200 bored sosplice 76588 116254 21864 0 2 0x1a000082 syz-fuzzer 76588 87996 21864 0 3 0x1e000082 nanoslp syz-fuzzer 76588 384845 21864 0 3 0x1e000082 wait syz-fuzzer 76588 309484 21864 0 3 0x1e000082 thrsleep syz-fuzzer 76588 504551 21864 0 3 0x1e000082 thrsleep syz-fuzzer 76588 38423 21864 0 3 0x1e000082 thrsleep syz-fuzzer 76588 367804 21864 0 3 0x1e000082 wait syz-fuzzer 76588 384277 21864 0 3 0x1e000082 wait syz-fuzzer 76588 67696 21864 0 3 0x1e000082 thrsleep syz-fuzzer 76588 45015 21864 0 3 0x1e000082 kqread syz-fuzzer 76588 474309 21864 0 3 0x1e000082 thrsleep syz-fuzzer 76588 395879 21864 0 3 0x1e000082 wait syz-fuzzer 76588 124349 21864 0 3 0x1e000082 wait syz-fuzzer 76588 185042 21864 0 3 0x1e000082 wait syz-fuzzer 76588 448778 21864 0 3 0x1e000082 wait syz-fuzzer 76588 212060 21864 0 3 0x1e000082 wait syz-fuzzer 21864 326757 37190 0 3 0x810008a sigsusp ksh 37190 435789 30043 0 3 0x1800009a kqread sshd 59665 480363 1 0 3 0x18100083 ttyin getty 30043 48766 1 0 3 0x18000088 kqread sshd 54724 106612 31237 73 3 0x19100090 kqread syslogd 31237 422518 1 0 3 0x18100082 sbwait syslogd 49362 246115 1 0 3 0x18100080 kqread resolvd 14281 78182 36472 77 3 0x18100092 kqread dhcpleased 8958 255672 36472 77 3 0x18100092 kqread dhcpleased 36472 434775 1 0 3 0x18000080 kqread dhcpleased 55743 363337 0 0 3 0x14200 bored smr 89020 186117 0 0 2 0x14200 zerothread 6987 44070 0 0 3 0x14200 aiodoned aiodoned 98339 263671 0 0 3 0x14200 syncer update 89174 369967 0 0 3 0x14200 cleaner cleaner 32239 262214 0 0 3 0x14200 reaper reaper 24279 228338 0 0 3 0x14200 pgdaemon pagedaemon 21927 413772 0 0 3 0x14200 bored viomb 18874 251073 0 0 3 0x40014200 acpi0 acpi0 49388 75676 0 0 3 0x40014200 idle1 93835 172632 0 0 3 0x14200 bored softnet3 92410 305884 0 0 3 0x14200 bored softnet2 79891 351020 0 0 3 0x14200 bored softnet1 63097 194465 0 0 2 0x14200 softnet0 8894 279214 0 0 3 0x14200 bored systqmp 46154 139528 0 0 3 0x14200 bored systq 75957 331823 0 0 3 0x14200 tmoslp softclockmp 68399 466134 0 0 3 0x40014200 tmoslp softclock 21255 272492 0 0 3 0x40014200 idle0 1 223142 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 48961 (syz-executor.4) thread 0xffff8000ffff7498 (160949) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82dbff60) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x491 sys/kern/sched_bsd.c:470 #3 sleep_finish+0x19a sys/kern/kern_synch.c:417 #4 biowait+0x91 sys/kern/vfs_bio.c:1254 #5 bwrite+0x1fe sys/kern/vfs_bio.c:766 #6 ffs_update+0x27f sys/ufs/ffs/ffs_inode.c:111 #7 ufs_mkdir+0x430 sys/ufs/ufs/ufs_vnops.c:1165 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3077 #10 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] #10 syscall+0x854 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80676c81a8) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 rw_enter+0x32d sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x91 sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x85 sys/kern/vfs_vnops.c:564 #5 vget+0x1fd sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ffs_inode_alloc+0x1e4 sys/ufs/ffs/ffs_alloc.c:393 #9 ufs_mkdir+0xe6 sys/ufs/ufs/ufs_vnops.c:1117 #10 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #11 domkdirat+0x125 sys/kern/vfs_syscalls.c:3077 #12 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] #12 syscall+0x854 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b1985e8) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 rw_enter+0x32d sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x91 sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x85 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd3 sys/kern/vfs_lookup.c:418 #6 namei+0x56a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3062 #8 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] #8 syscall+0x854 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 76588 (syz-fuzzer) thread 0xffff80002a149c38 (38423) exclusive rwlock pslock r = 0 (0xffff8000ffffa000) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 sys___thrwakeup+0x9c sys/kern/kern_synch.c:771 #2 syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] #2 syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10200 6411K 6419K 166960K 11552 0 pcb 17 16K 18K 166960K 21 0 rtable 242 6K 7K 166960K 3936 0 pf 29 8K 8K 166960K 211 0 ifaddr 44 16K 16K 166960K 416 0 ifgroup 50 2K 2K 166960K 414 0 sysctl 4 1K 2K 166960K 8 0 counters 64 36K 36K 166960K 246 0 ioctlops 0 0K 2K 166960K 262 0 iov 1 8K 28K 166960K 583 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1377 87K 87K 166960K 3803 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 224 0 VM map 2 1K 1K 166960K 2 0 sem 11 1K 1K 166960K 21 0 dirhash 12 2K 3K 166960K 525 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 24 89K 121K 166960K 11822 0 sigio 0 0K 0K 166960K 224 0 proc 56 78K 127K 166960K 3933 0 subproc 104 6K 7K 166960K 1469 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 2641 0 in_multi 99 7K 7K 166960K 1682 0 ether_multi 1 0K 0K 166960K 58 0 mrt 2 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 217 970K 970K 166960K 217 0 exec 0 0K 1K 166960K 2587 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 307 76K 104K 166960K 102082 0 UVM aobj 131 6K 6K 166960K 144 0 pinsyscall 44 88K 108K 166960K 15364 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 780 0 NDP 11 0K 2K 166960K 300 0 temp 74 6820K 6948K 166960K 40067 0 kqueue 12 18K 32K 166960K 1684 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 1642 0 1637 7 6 1 3 0 8 0 rtentry 112 1224 0 1110 5 1 4 4 0 8 0 unpcb 144 9101 0 9082 27 26 1 8 0 8 0 syncache 336 107 0 107 34 34 0 1 0 8 0 sackhl 24 2 0 2 2 2 0 1 0 8 0 tcpqe 32 61 0 61 8 8 0 1 0 8 0 tcpcb 808 6039 0 6032 91 84 7 18 0 8 5 arp 120 200 0 182 1 0 1 1 0 8 0 ipq 40 45 0 42 7 6 1 1 0 8 0 ipqe 40 876 0 873 7 6 1 1 0 8 0 inpcb 384 13688 0 13676 137 129 8 15 0 8 6 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 136 409 0 381 4 2 2 2 0 8 0 kcovpl 48 113 0 105 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 4914 0 4448 39 9 30 32 0 8 0 art_table 32 4915 0 4448 5 1 4 5 0 8 0 art_node 16 1223 0 1119 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 1 1 0 1 1 0 8 0 semapl 112 9 0 0 1 0 1 1 0 8 0 shmpl 112 141 0 13 4 0 4 4 0 8 0 dirhash 1024 359 0 342 3 0 3 3 0 8 0 dino2pl 256 17478 0 15943 97 0 97 97 0 8 0 ffsino 272 17478 0 15943 103 0 103 103 0 8 0 nchpl 144 33036 0 31303 66 0 66 66 0 8 0 uvmvnodes 80 9343 0 0 191 0 191 191 0 8 0 vnodes 216 9343 0 0 520 0 520 520 0 8 0 namei 1024 114787 0 114786 22 21 1 3 0 8 0 percpumem 16 137 0 91 1 0 1 1 0 8 0 kstatmem 264 204 0 182 2 0 2 2 0 8 0 scxspl 216 198674 0 198674 60 59 1 8 1 8 1 plimitpl 152 2338 0 2314 2 0 2 2 0 8 0 sigapl 424 11884 0 11830 9 2 7 7 0 8 0 futexpl 64 153392 0 153388 23 22 1 1 0 8 0 knotepl 120 1184 0 0 11 0 11 11 0 8 0 kqueuepl 216 3298 0 3288 17 16 1 5 0 8 0 pipepl 320 2008 0 1979 14 11 3 10 0 8 0 fdescpl 496 11865 0 11830 7 2 5 6 0 8 0 filepl 152 71134 0 70883 63 50 13 19 0 8 0 lockfpl 104 2931 0 2929 1 0 1 1 0 8 0 lockfspl 48 1002 0 1000 1 0 1 1 0 8 0 sessionpl 144 114 0 98 1 0 1 1 0 8 0 pgrppl 48 402 0 386 1 0 1 1 0 8 0 ucredpl 104 14610 0 14592 1 0 1 1 0 8 0 zombiepl 144 11830 0 11830 1 0 1 1 0 8 1 processpl 1136 11884 0 11830 5 0 5 5 0 8 0 procpl 656 24896 0 24818 12 4 8 8 0 8 0 sosppl 168 288 0 287 32 31 1 1 0 8 0 sockpl 664 24757 0 24721 159 150 9 19 0 8 5 mcl64k 65536 27 0 0 4 2 2 3 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 1034 0 0 38 7 31 38 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 2150 0 0 118 0 118 118 0 8 0 bufpl 280 27310 0 17906 673 0 673 673 0 8 0 anonpl 24 1666668 0 1659985 359 270 89 147 0 186 16 amapchunkpl 152 343621 0 342845 224 190 34 57 0 158 0 amappl16 200 40489 0 40366 297 273 24 39 0 8 6 amappl15 192 16 0 15 1 0 1 1 0 8 0 amappl14 184 468 0 454 2 1 1 2 0 8 0 amappl13 176 57 0 57 5 4 1 1 0 8 1 amappl12 168 13899 0 13861 2 0 2 2 0 8 0 amappl11 160 48 0 38 1 0 1 1 0 8 0 amappl10 152 285 0 275 1 0 1 1 0 8 0 amappl9 144 173 0 173 1 1 0 1 0 8 0 amappl8 136 515 0 474 2 0 2 2 0 8 0 amappl7 128 65 0 50 1 0 1 1 0 8 0 amappl6 120 1607 0 1590 2 1 1 2 0 8 0 amappl5 112 524 0 512 1 0 1 1 0 8 0 amappl4 104 1325 0 1292 2 0 2 2 0 8 0 amappl3 96 61822 0 61726 4 1 3 4 0 8 0 amappl2 88 12620 0 12540 4 2 2 4 0 8 0 amappl1 80 50538 0 50020 23 11 12 22 0 8 0 amappl 88 99811 0 99581 7 1 6 7 0 92 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 72 143 0 13 3 0 3 3 0 8 0 uaddrrnd 24 11865 0 11830 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11865 0 11830 1 0 1 1 0 8 0 vmmpekpl 168 80981 0 80921 4 0 4 4 0 8 0 vmmpepl 168 719085 0 716948 332 215 117 119 0 357 11 vmsppl 440 11864 0 11830 6 1 5 5 0 8 0 rwobjpl 56 176855 0 166287 183 28 155 157 0 8 1 pdppl 4096 23737 0 23660 484 403 81 93 0 8 4 pvpl 32 48800 0 0 395 1 394 394 0 265 0 pmappl 248 11864 0 11830 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1040 0 562 15 0 15 15 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82d35ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82dbfd58) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82dbfd58) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff80002c6d5e10,ffff80000067b300) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:539 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f Xspllower() at Xspllower+0x1d cnputc(20) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x312 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(70) at db_putchar+0x312 sys/ddb/db_output.c:153 kprintf() at kprintf+0x69a db_printf(ffffffff828f28ae) at db_printf+0x89 sys/kern/subr_prf.c:498 panic(ffffffff82952b1b) at panic+0xdb sys/kern/subr_prf.c:216 __assert(ffffffff829092ba,ffffffff828a5064,3b9,ffffffff829277ca) at __assert+0x29 sys/kern/subr_prf.c:157 uvn_get(fffffd806de3c748,3000,ffff80002c6d64c0,ffff80002c6d633c,3,1,6b9d90eb279f7b0f,3000) at uvn_get+0x4ca sys/uvm/uvm_vnode.c:952 end trace frame: 0xffff80002c6d6390, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82d35ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82dbfd58) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82dbfd58) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff80002c6d5e10,ffff80000067b300) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:539 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f Xspllower() at Xspllower+0x1d cnputc(20) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x312 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(70) at db_putchar+0x312 sys/ddb/db_output.c:153 kprintf() at kprintf+0x69a db_printf(ffffffff828f28ae) at db_printf+0x89 sys/kern/subr_prf.c:498 panic(ffffffff82952b1b) at panic+0xdb sys/kern/subr_prf.c:216 __assert(ffffffff829092ba,ffffffff828a5064,3b9,ffffffff829277ca) at __assert+0x29 sys/kern/subr_prf.c:157 uvn_get(fffffd806de3c748,3000,ffff80002c6d64c0,ffff80002c6d633c,3,1,6b9d90eb279f7b0f,3000) at uvn_get+0x4ca sys/uvm/uvm_vnode.c:952 uvm_fault_lower_lookup(ffff80002c6d6540,ffff80002c6d6578,ffff80002c6d64c0) at uvm_fault_lower_lookup+0xf3 sys/uvm/uvm_fault.c:1128 uvm_fault_lower(ffff80002c6d6540,ffff80002c6d6578,ffff80002c6d64c0,0) at uvm_fault_lower+0x62 sys/uvm/uvm_fault.c:1227 uvm_fault(fffffd8050c5b6e8,5abe294000,0,1) at uvm_fault+0x255 sys/uvm/uvm_fault.c:637 upageflttrap(ffff80002c6d66c0,5abe294f42) at upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002c6d66c0) at usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x75a15d652b50, count: -20 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8288f7a8) at panic+0x17b sys/kern/subr_prf.c:198 vop_generic_badop(ffff80002d0e6018) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd80613dcce0,fffffd8065a6c250) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd8065a6c250) at bwrite+0x1d3 sys/kern/vfs_bio.c:757 VOP_BWRITE(fffffd8065a6c250) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002d0e6290) at ufs_mkdir+0x445 sys/ufs/ufs/ufs_vnops.c:1165 VOP_MKDIR(fffffd806b678dd0,ffff80002d0e63f0,ffff80002d0e6420,ffff80002d0e6320) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff8000ffff7498,ffffff9c,7bc7169a1460,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3077 syscall(ffff80002d0e65a0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002d0e65a0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bc7169a14d0, count: 4 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8288f7a8) at panic+0x17b sys/kern/subr_prf.c:198 vop_generic_badop(ffff80002d0e6018) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd80613dcce0,fffffd8065a6c250) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd8065a6c250) at bwrite+0x1d3 sys/kern/vfs_bio.c:757 VOP_BWRITE(fffffd8065a6c250) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002d0e6290) at ufs_mkdir+0x445 sys/ufs/ufs/ufs_vnops.c:1165 VOP_MKDIR(fffffd806b678dd0,ffff80002d0e63f0,ffff80002d0e6420,ffff80002d0e6320) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff8000ffff7498,ffffff9c,7bc7169a1460,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3077 syscall(ffff80002d0e65a0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002d0e65a0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bc7169a14d0, count: -11