ppanic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 674 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *159795 45887 32767 0x10 0 1 syz-executor.6 96408 45350 32767 0x10 0 0 syz-executor.5 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8274c9bf) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cb2dd,ffffffff82789f75,2a2,ffffffff827822c6) at __assert+0x25 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x131 end trace frame: 0x0, count: 11 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: vop_generic_badop cpu1: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 674 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8274c9bf) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cb2dd,ffffffff82789f75,2a2,ffffffff827822c6) at __assert+0x25 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x131 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e43f720 rbx 0xffff800020d69b8f rdx 0 rcx 0 rax 0xffff80002128f5e8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3b448c00a32b0768 r11 0xc4fc628ac44b1d3f r12 0xffff800020d69990 r13 0 r14 0xffffffff82bc2990 cpu_info_full_primary+0x2990 r15 0x1 rip 0xffffffff818c3858 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e43f710 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.6) pid=159795 stat=onproc flags process=10 proc=0 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80002128e598,0xffffffff82caafb0 process=0xffff8000ffff94f8 user=0xffff80002e43a000, vmspace=0xfffffd80660a1528 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *45887 159795 13854 32767 7 0x10 syz-executor.6 96119 157646 55793 32767 2 0x10 syz-executor.4 79107 400721 2118 32767 2 0x10 syz-executor.2 79107 288329 2118 32767 3 0x4000090 kqread syz-executor.2 79107 334856 2118 32767 3 0x4000090 kqread syz-executor.2 28873 211461 57566 32767 2 0x10 syz-executor.3 57566 129079 68605 0 3 0x82 wait syz-executor.3 65544 343166 32120 32767 3 0x10 biowait syz-executor.0 32120 404160 68605 0 3 0x82 wait syz-executor.0 27111 21262 58414 32767 3 0x90 nanoslp syz-executor.1 58414 241701 68605 0 3 0x82 wait syz-executor.1 55793 292174 64224 32767 3 0x90 nanoslp syz-executor.4 64224 271326 68605 0 3 0x82 wait syz-executor.4 13854 323498 22660 32767 2 0x10 syz-executor.6 22660 48884 68605 0 3 0x82 wait syz-executor.6 85064 362103 0 0 3 0x14200 bored sosplice 96009 341946 57650 32767 3 0x90 nanoslp syz-executor.7 57650 329380 68605 0 3 0x82 wait syz-executor.7 45350 96408 45190 32767 7 0x10 syz-executor.5 45190 259005 68605 0 3 0x82 wait syz-executor.5 2118 183980 11030 32767 3 0x90 nanoslp syz-executor.2 11030 177202 68605 0 3 0x82 wait syz-executor.2 68605 319216 56036 0 3 0x82 wait syz-fuzzer 68605 314223 56036 0 3 0x4000082 nanoslp syz-fuzzer 68605 218308 56036 0 3 0x4000082 wait syz-fuzzer 68605 494531 56036 0 3 0x4000082 wait syz-fuzzer 68605 138637 56036 0 3 0x4000082 thrsleep syz-fuzzer 68605 145798 56036 0 3 0x4000082 thrsleep syz-fuzzer 68605 78585 56036 0 3 0x4000082 kqread syz-fuzzer 68605 311090 56036 0 3 0x4000082 wait syz-fuzzer 68605 311575 56036 0 3 0x4000082 thrsleep syz-fuzzer 68605 392425 56036 0 3 0x4000082 wait syz-fuzzer 68605 90751 56036 0 3 0x4000082 thrsleep syz-fuzzer 68605 281874 56036 0 3 0x4000082 thrsleep syz-fuzzer 68605 305498 56036 0 3 0x4000082 wait syz-fuzzer 68605 520161 56036 0 3 0x4000082 wait syz-fuzzer 68605 488335 56036 0 3 0x4000082 wait syz-fuzzer 68605 18255 56036 0 3 0x4000082 thrsleep syz-fuzzer 56036 252297 72113 0 3 0x10008a sigsusp ksh 72113 29824 55546 0 3 0x9a kqread sshd 69006 367564 1 0 3 0x100083 ttyin getty 55546 212193 1 0 3 0x88 kqread sshd 99055 107265 19620 73 3 0x1100090 kqread syslogd 19620 319913 1 0 3 0x100082 netio syslogd 41167 395375 1 0 3 0x100080 kqread resolvd 4555 256714 5856 77 3 0x100092 kqread dhcpleased 48866 124616 5856 77 3 0x100092 kqread dhcpleased 5856 180803 1 0 3 0x80 kqread dhcpleased 29470 389214 0 0 3 0x14200 bored smr 72182 421044 0 0 2 0x14200 zerothread 20238 161204 0 0 3 0x14200 aiodoned aiodoned 22076 6355 0 0 3 0x14200 syncer update 9549 112405 0 0 3 0x14200 cleaner cleaner 83023 106338 0 0 3 0x14200 reaper reaper 69160 136975 0 0 3 0x14200 pgdaemon pagedaemon 24511 45474 0 0 3 0x14200 bored viomb 26381 8696 0 0 3 0x40014200 acpi0 acpi0 90338 203546 0 0 3 0x40014200 idle1 23618 96952 0 0 3 0x14200 bored softnet 41455 149847 0 0 3 0x14200 bored softnet 834 411134 0 0 3 0x14200 bored softnet 28018 364670 0 0 3 0x14200 bored softnet 97784 331266 0 0 3 0x14200 bored systqmp 32259 69302 0 0 3 0x14200 bored systq 97742 413815 0 0 3 0x40014200 bored softclock 1947 411342 0 0 3 0x40014200 idle0 1 183179 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 65544 (syz-executor.0) thread 0xffff8000295942f8 (343166) exclusive rrwlock inode r = 0 (0xfffffd807ba88a30) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8068b76f78) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #9 Xsyscall+0x128 Process 45350 (syz-executor.5) thread 0xffff800025748b10 (96408) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82c2ca98) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3bb sys/kern/sched_bsd.c:405 #3 sleep_finish+0x180 sys/kern/kern_synch.c:417 #4 tsleep+0x12c sys/kern/kern_synch.c:155 #5 biowait+0x91 sys/kern/vfs_bio.c:1268 #6 bwrite+0x21b sys/kern/vfs_bio.c:769 #7 ffs_update+0x27d sys/ufs/ffs/ffs_inode.c:113 #8 ufs_mkdir+0x662 sys/ufs/ufs/ufs_vnops.c:1220 #9 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #10 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #11 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #11 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807ba882c0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x1fc 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:1324 #8 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #9 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #10 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #11 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #12 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #12 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8067b3f4e0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10228 6413K 6421K 78643K 11350 0 pcb 13 12K 14K 78643K 17 0 rtable 240 6K 7K 78643K 921 0 ifaddr 73 24K 24K 78643K 137 0 sysctl 3 1K 1K 78643K 3 0 counters 60 35K 35K 78643K 80 0 ioctlops 0 0K 2K 78643K 141 0 iov 0 0K 34K 78643K 1429 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1272 80K 80K 78643K 2740 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 95 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 3816 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 21 77K 113K 78643K 6348 0 sigio 0 0K 0K 78643K 44 0 proc 56 78K 115K 78643K 1244 0 subproc 104 6K 6K 78643K 234 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 899 0 in_multi 99 6K 6K 78643K 346 0 ether_multi 1 0K 0K 78643K 44 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 1K 78643K 1457 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 359 87K 104K 78643K 46969 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 272 0 NDP 11 0K 2K 78643K 57 0 temp 124 5778K 5843K 78643K 19794 0 kqueue 12 18K 27K 78643K 609 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 727 0 724 12 11 1 3 0 8 0 rtentry 112 235 0 122 4 0 4 4 0 8 0 unpcb 144 17867 0 17854 99 97 2 13 0 8 1 syncache 296 96 0 96 12 12 0 1 0 8 0 tcpqe 32 872 0 872 13 13 0 1 0 8 0 tcpcb 776 3978 0 3972 95 92 3 15 0 8 1 arp 120 40 0 22 1 0 1 1 0 8 0 ipq 40 7 0 7 3 3 0 1 0 8 0 ipqe 40 19 0 19 3 3 0 1 0 8 0 inpcb 368 7851 0 7842 99 96 3 14 0 8 1 nd6 48 66 0 39 1 0 1 1 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 966 0 493 34 4 30 31 0 8 0 art_table 32 967 0 493 4 0 4 4 0 8 0 art_node 16 234 0 131 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 14 1 1 0 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 3812 0 3802 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 10270 0 8815 92 0 92 92 0 8 0 ffsino 272 10270 0 8815 98 0 98 98 0 8 0 nchpl 144 19453 0 17817 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 69369 0 69367 8 7 1 2 0 8 0 percpumem 16 53 0 10 1 0 1 1 0 8 0 kstatmem 264 42 0 20 2 0 2 2 0 8 0 scxspl 216 53345 0 53344 34 31 3 8 0 8 2 plimitpl 152 1332 0 1309 12 11 1 2 0 8 0 sigapl 424 6620 0 6568 7 0 7 7 0 8 0 futexpl 64 65666 0 65666 6 5 1 1 0 8 1 knotepl 120 684 0 0 19 2 17 18 0 8 0 kqueuepl 216 2001 0 1991 46 45 1 12 0 8 0 pipepl 320 2690 0 2662 64 61 3 8 0 8 0 fdescpl 496 6602 0 6570 7 2 5 6 0 8 0 filepl 152 64873 0 64636 127 117 10 23 0 8 0 lockfpl 104 1661 0 1659 4 3 1 2 0 8 0 lockfspl 48 211 0 209 1 0 1 1 0 8 0 sessionpl 144 33 0 17 1 0 1 1 0 8 0 pgrppl 48 136 0 120 1 0 1 1 0 8 0 ucredpl 104 8973 0 8955 1 0 1 1 0 8 0 zombiepl 144 6570 0 6568 2 1 1 1 0 8 0 processpl 1072 6620 0 6568 4 0 4 4 0 8 0 procpl 696 19070 0 19001 18 10 8 9 0 8 0 sosppl 168 132 0 132 9 9 0 1 0 8 0 sockpl 488 26683 0 26658 571 565 6 46 0 8 2 mcl64k 65536 24 0 0 3 0 3 3 0 8 0 mcl16k 16384 19 0 0 3 1 2 3 0 8 0 mcl12k 12288 21 0 0 3 0 3 3 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 3 0 3 3 0 8 0 mcl4k 4096 19 0 0 3 0 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 350 0 0 30 6 24 30 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 2248 0 0 116 0 116 116 0 8 0 bufpl 288 14512 0 8191 452 0 452 452 0 8 0 anonpl 24 1523288 0 1509572 277 167 110 124 0 186 0 amapchunkpl 152 150496 0 149817 146 109 37 50 0 158 5 amappl16 200 23027 0 22632 187 163 24 39 0 8 0 amappl15 192 7 0 7 2 2 0 1 0 8 0 amappl14 184 191 0 173 2 1 1 2 0 8 0 amappl13 176 13 0 12 2 1 1 1 0 8 0 amappl12 168 541 0 537 1 0 1 1 0 8 0 amappl11 160 60 0 49 1 0 1 1 0 8 0 amappl10 152 48 0 38 2 1 1 1 0 8 0 amappl9 144 1029 0 1029 14 13 1 1 0 8 1 amappl8 136 518 0 401 5 0 5 5 0 8 0 amappl7 128 207 0 182 2 0 2 2 0 8 0 amappl6 120 303 0 285 2 1 1 2 0 8 0 amappl5 112 299 0 292 1 0 1 1 0 8 0 amappl4 104 782 0 740 2 0 2 2 0 8 0 amappl3 96 20183 0 20135 2 0 2 2 0 8 0 amappl2 88 7352 0 7273 3 1 2 3 0 8 0 amappl1 80 153704 0 153012 31 13 18 26 0 8 0 amappl 88 45995 0 45807 10 4 6 6 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 6602 0 6570 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6602 0 6570 1 0 1 1 0 8 0 vmmpekpl 168 65741 0 65681 4 0 4 4 0 8 0 vmmpepl 168 625728 0 623049 291 151 140 150 0 357 0 vmsppl 440 6601 0 6570 5 0 5 5 0 8 0 rwobjpl 56 181157 0 173581 121 9 112 113 0 8 0 pdppl 4096 13211 0 13140 319 238 81 89 0 8 10 pvpl 32 2808220 0 2788656 558 364 194 361 0 265 7 pmappl 248 6601 0 6570 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1267 0 354 27 0 27 27 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82bc1ff0) at x86_ipi_db+0x1a 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+0x23 __mp_lock(ffffffff82c2c890) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c2c890) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff800027d7cdf0,ffff80000006ba00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f Xspllower() at Xspllower+0x19 cnputc(70) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6ac sys/kern/subr_prf.c:724 db_printf(ffffffff827ce835) at db_printf+0x85 sys/kern/subr_prf.c:498 panic(ffffffff82740948) at panic+0xd7 sys/kern/subr_prf.c:216 vop_generic_badop(ffff800027d7d218) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd806703fa80,fffffd807c6c3b40) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 end trace frame: 0xffff800027d7d2c0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82bc1ff0) at x86_ipi_db+0x1a 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+0x23 __mp_lock(ffffffff82c2c890) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c2c890) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff800027d7cdf0,ffff80000006ba00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f Xspllower() at Xspllower+0x19 cnputc(70) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6ac sys/kern/subr_prf.c:724 db_printf(ffffffff827ce835) at db_printf+0x85 sys/kern/subr_prf.c:498 panic(ffffffff82740948) at panic+0xd7 sys/kern/subr_prf.c:216 vop_generic_badop(ffff800027d7d218) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd806703fa80,fffffd807c6c3b40) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 bwrite(fffffd807c6c3b40) at bwrite+0x1f0 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd807c6c3b40) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 ufs_mkdir(ffff800027d7d4b0) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236 VOP_MKDIR(fffffd8066d67620,ffff800027d7d610,ffff800027d7d640,ffff800027d7d540) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff800025748b10,ffffff9c,7f7ffffc6010,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 syscall(ffff800027d7d7c0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800027d7d7c0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc6080, count: -21 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8274c9bf) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cb2dd,ffffffff82789f75,2a2,ffffffff827822c6) at __assert+0x25 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x131 end trace frame: 0x0, count: 11 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8274c9bf) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cb2dd,ffffffff82789f75,2a2,ffffffff827822c6) at __assert+0x25 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x131 end trace frame: 0x0, count: -4