panicpanic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 675 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 19027 31521 32767 0x10 0x4000000 1 syz-executor.4 195640 37851 32767 0x10 0 0 syz-executor.3 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82790103) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8280f6e9,ffffffff827d18e0,2a3,ffffffff827c9724) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 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 675 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82790103) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8280f6e9,ffffffff827d18e0,2a3,ffffffff827c9724) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000295acfe0 rbx 0xffff800020d59b8f rdx 0 rcx 0 rax 0xffff8000212b58a0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x52a8615d69566fe7 r11 0x96b6efc33bbbea69 r12 0xffff800020d59990 r13 0 r14 0xffffffff82bb8990 cpu_info_full_primary+0x2990 r15 0x1 rip 0xffffffff81027abc db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff8000295acfd0 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.4) pid=19027 stat=onproc flags process=10 proc=4000000 pri=54, usrpri=67, nice=20 forw=0xffffffffffffffff, list=0xffff8000212b5330,0xffff8000212b55f8 process=0xffff800022cf2e28 user=0xffff8000295a8000, vmspace=0xfffffd8069ea3020 estcpu=17, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 31521 61325 72906 32767 2 0x10 syz-executor.4 31521 127951 72906 32767 2 0x4000090 syz-executor.4 *31521 19027 72906 32767 7 0x4000010 syz-executor.4 31521 180060 72906 32767 2 0x4000010 syz-executor.4 47778 480776 17129 32767 2 0x10 syz-executor.1 47778 236126 17129 32767 3 0x4000090 netcon2 syz-executor.1 47778 344821 17129 32767 3 0x4000090 fsleep syz-executor.1 47778 343094 17129 32767 3 0x4000090 fsleep syz-executor.1 94901 317543 75282 32767 3 0x90 piperd syz-executor.2 75282 59978 58960 0 3 0x82 wait syz-executor.2 72906 422716 557 32767 3 0x90 nanoslp syz-executor.4 557 172531 58960 0 3 0x82 wait syz-executor.4 70582 349092 89402 32767 3 0x90 nanoslp syz-executor.0 89402 408410 58960 0 3 0x82 wait syz-executor.0 31133 28975 24990 32767 3 0x90 nanoslp syz-executor.5 24990 372288 58960 0 3 0x82 wait syz-executor.5 37851 195640 80514 32767 7 0x10 syz-executor.3 80514 260746 58960 0 3 0x82 wait syz-executor.3 74326 60712 32410 32767 3 0x90 piperd syz-executor.6 32410 33972 58960 0 3 0x82 wait syz-executor.6 76268 213717 0 0 3 0x14200 bored sosplice 32742 485893 17836 32767 2 0x10 syz-executor.7 17836 143534 58960 0 3 0x82 wait syz-executor.7 17129 243255 98329 32767 3 0x90 nanoslp syz-executor.1 98329 219415 58960 0 3 0x82 wait syz-executor.1 58960 253269 22544 0 3 0x82 wait syz-fuzzer 58960 370103 22544 0 3 0x4000082 nanoslp syz-fuzzer 58960 229375 22544 0 3 0x4000082 kqread syz-fuzzer 58960 471994 22544 0 3 0x4000082 thrsleep syz-fuzzer 58960 328348 22544 0 3 0x4000082 wait syz-fuzzer 58960 360255 22544 0 3 0x4000082 wait syz-fuzzer 58960 124815 22544 0 3 0x4000082 thrsleep syz-fuzzer 58960 384658 22544 0 3 0x4000082 thrsleep syz-fuzzer 58960 35908 22544 0 3 0x4000082 wait syz-fuzzer 58960 404412 22544 0 2 0x4000002 syz-fuzzer 58960 371818 22544 0 3 0x4000082 thrsleep syz-fuzzer 58960 109257 22544 0 3 0x4000082 wait syz-fuzzer 58960 135885 22544 0 3 0x4000082 wait syz-fuzzer 58960 242506 22544 0 3 0x4000082 wait syz-fuzzer 58960 90635 22544 0 3 0x4000082 thrsleep syz-fuzzer 58960 40078 22544 0 3 0x4000082 wait syz-fuzzer 22544 457648 46286 0 3 0x10008a sigsusp ksh 46286 415773 60154 0 3 0x9a kqread sshd 78743 402952 1 0 3 0x100083 ttyin getty 60154 334078 1 0 3 0x88 kqread sshd 21008 382936 54875 73 3 0x1100010 biowait syslogd 54875 364573 1 0 3 0x100082 netio syslogd 77709 418055 1 0 3 0x100080 kqread resolvd 66508 166914 65137 77 3 0x100092 kqread dhcpleased 86540 43762 65137 77 3 0x100092 kqread dhcpleased 65137 288354 1 0 3 0x80 kqread dhcpleased 41020 171160 0 0 3 0x14200 bored smr 14199 360955 0 0 2 0x14200 zerothread 75228 138771 0 0 3 0x14200 aiodoned aiodoned 52304 304877 0 0 3 0x14200 syncer update 24406 316389 0 0 3 0x14200 cleaner cleaner 27408 41124 0 0 3 0x14200 reaper reaper 70186 60784 0 0 3 0x14200 pgdaemon pagedaemon 597 499014 0 0 3 0x14200 bored viomb 97391 364722 0 0 3 0x40014200 acpi0 acpi0 15334 371820 0 0 3 0x40014200 idle1 38142 392714 0 0 3 0x14200 bored softnet3 86816 12667 0 0 3 0x14200 bored softnet2 76998 487756 0 0 3 0x14200 bored softnet1 87797 496064 0 0 2 0x14200 softnet0 16628 419860 0 0 3 0x14200 bored systqmp 525 264638 0 0 3 0x14200 bored systq 85738 454568 0 0 3 0x40014200 bored softclock 21217 235967 0 0 3 0x40014200 idle0 1 498947 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 37851 (syz-executor.3) thread 0xffff800021236020 (195640) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82d693a0) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3c3 sys/kern/sched_bsd.c:405 #3 sleep_finish+0x184 sys/kern/kern_synch.c:417 #4 tsleep+0x12b sys/kern/kern_synch.c:155 #5 biowait+0x91 sys/kern/vfs_bio.c:1278 #6 bwrite+0x21f sys/kern/vfs_bio.c:769 #7 ffs_update+0x281 sys/ufs/ffs/ffs_inode.c:113 #8 ufs_mkdir+0x672 sys/ufs/ufs/ufs_vnops.c:1219 #9 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #10 domkdirat+0x125 sys/kern/vfs_syscalls.c:3074 #11 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #11 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8067f94d68) #0 witness_lock+0x44d #1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x200 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+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #9 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #10 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #11 domkdirat+0x125 sys/kern/vfs_syscalls.c:3074 #12 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #12 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8008a0dd58) #0 witness_lock+0x44d #1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3059 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #9 Xsyscall+0x128 Process 21008 (syslogd) thread 0xffff8000211adb38 (382936) exclusive rrwlock inode r = 0 (0xfffffd806e5b6920) #0 witness_lock+0x44d #1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8f sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0xf9 sys/kern/vfs_syscalls.c:2897 #6 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #6 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10224 6414K 6419K 78643K 11385 0 pcb 13 12K 14K 78643K 17 0 rtable 246 7K 7K 78643K 2712 0 ifaddr 73 24K 25K 78643K 217 0 sysctl 3 1K 5K 78643K 75 0 counters 60 35K 35K 78643K 106 0 ioctlops 0 0K 2K 78643K 246 0 iov 0 0K 28K 78643K 6958 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 5506 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 387 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 7461 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 20 73K 125K 78643K 27310 0 sigio 0 0K 0K 78643K 383 0 proc 56 78K 115K 78643K 2495 0 subproc 104 6K 6K 78643K 403 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2421 0 in_multi 99 6K 7K 78643K 783 0 ether_multi 1 0K 0K 78643K 132 0 mrt 2 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 337 1500K 1500K 78643K 337 0 exec 0 0K 1K 78643K 4450 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 506 99K 992K 78643K 273658 0 UVM aobj 131 8K 8K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 850 0 NDP 11 0K 2K 78643K 96 0 temp 124 5866K 5994K 78643K 67063 0 kqueue 12 18K 31K 78643K 2543 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 2598 0 2595 32 31 1 3 0 8 0 rtentry 112 411 0 295 4 0 4 4 0 8 0 unpcb 144 44273 0 44260 209 208 1 10 0 8 0 syncache 296 225 0 225 49 49 0 1 0 8 0 tcpqe 32 216 0 216 32 32 0 1 0 8 0 tcpcb 776 11451 0 11446 283 282 1 15 0 8 0 arp 120 77 0 57 1 0 1 1 0 8 0 ipq 40 87 0 87 12 12 0 1 0 8 0 ipqe 40 296 0 296 12 12 0 1 0 8 0 inpcb 368 24615 0 24604 353 351 2 17 0 8 0 ip6q 72 4 0 4 2 2 0 1 0 8 0 ip6af 40 4 0 4 2 2 0 1 0 8 0 nd6 136 127 0 99 2 0 2 2 0 8 0 kcovpl 48 31 0 23 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1627 0 1159 36 6 30 32 0 8 0 art_table 32 1628 0 1159 6 1 5 5 0 8 0 art_node 16 410 0 304 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 1 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 7459 0 7449 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 36585 0 35121 92 0 92 92 0 8 0 ffsino 272 36585 0 35121 99 0 99 99 0 8 0 nchpl 144 72486 0 70846 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 241861 0 241860 10 9 1 3 0 8 0 percpumem 16 66 0 23 1 0 1 1 0 8 0 kstatmem 264 68 0 46 2 0 2 2 0 8 0 scxspl 216 232285 0 232284 86 85 1 8 0 8 0 plimitpl 152 5927 0 5904 58 57 1 2 0 8 0 sigapl 424 27549 0 27498 7 0 7 7 0 8 0 futexpl 64 257096 0 257094 6 5 1 1 0 8 0 knotepl 120 1262 0 0 14 0 14 14 0 8 0 kqueuepl 216 7731 0 7723 124 123 1 6 0 8 0 pipepl 320 8039 0 8011 205 202 3 13 0 8 0 fdescpl 496 27531 0 27500 7 2 5 6 0 8 0 filepl 152 203374 0 203139 329 319 10 22 0 8 0 lockfpl 104 2412 0 2410 1 0 1 1 0 8 0 lockfspl 48 685 0 683 1 0 1 1 0 8 0 sessionpl 144 46 0 30 1 0 1 1 0 8 0 pgrppl 48 579 0 563 1 0 1 1 0 8 0 ucredpl 104 28869 0 28851 1 0 1 1 0 8 0 zombiepl 144 27500 0 27498 1 0 1 1 0 8 0 processpl 1072 27549 0 27498 5 1 4 5 0 8 0 procpl 696 78200 0 78128 34 26 8 9 0 8 0 sosppl 168 391 0 390 40 39 1 1 0 8 0 sockpl 488 72653 0 72629 1167 1162 5 36 0 8 1 mcl64k 65536 33 0 0 3 0 3 3 0 8 0 mcl16k 16384 34 0 0 3 0 3 3 0 8 0 mcl12k 12288 41 0 0 2 0 2 2 0 8 0 mcl9k 9216 36 0 0 2 1 1 2 0 8 0 mcl8k 8192 130 0 0 12 9 3 9 0 8 0 mcl4k 4096 49 0 0 5 2 3 3 0 8 0 mcl2k2 2112 11 0 0 1 0 1 1 0 8 0 mcl2k 2048 778 0 0 61 45 16 61 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 5525 0 0 290 0 290 290 0 8 0 bufpl 288 49702 0 43387 452 0 452 452 0 8 0 anonpl 24 2825242 0 2811741 244 123 121 129 0 186 0 amapchunkpl 152 1699106 0 1698248 11150 11102 48 4424 0 158 3 amappl16 200 57479 0 57126 185 159 26 46 0 8 0 amappl15 192 9 0 9 2 2 0 1 0 8 0 amappl14 184 261 0 240 4 2 2 2 0 8 0 amappl13 176 12 0 12 2 2 0 1 0 8 0 amappl12 168 28541 0 28507 2 0 2 2 0 8 0 amappl11 160 67 0 57 1 0 1 1 0 8 0 amappl10 152 56 0 43 2 1 1 1 0 8 0 amappl9 144 462 0 461 2 1 1 2 0 8 0 amappl8 136 1557 0 1289 11 1 10 10 0 8 0 amappl7 128 301 0 283 1 0 1 1 0 8 0 amappl6 120 710 0 684 2 1 1 2 0 8 0 amappl5 112 918 0 910 1 0 1 1 0 8 0 amappl4 104 1966 0 1919 2 0 2 2 0 8 0 amappl3 96 168174 0 168096 9 6 3 4 0 8 0 amappl2 88 29730 0 29656 4 2 2 3 0 8 0 amappl1 80 103412 0 102900 22 9 13 22 0 8 0 amappl 88 271517 0 271270 10 1 9 9 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 27531 0 27500 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 27531 0 27500 1 0 1 1 0 8 0 vmmpekpl 168 222907 0 222839 4 0 4 4 0 8 0 vmmpepl 168 1616561 0 1614026 392 267 125 137 0 357 1 vmsppl 464 27530 0 27500 7 2 5 6 0 8 0 rwobjpl 56 395359 0 387738 128 16 112 113 0 8 0 pdppl 4096 55070 0 55000 855 773 82 96 0 8 12 pvpl 32 8077928 0 8058502 731 500 231 362 0 265 19 pmappl 248 27530 0 27500 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2278 0 1197 32 0 32 32 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82bb7ff0) 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+0x23 __mp_lock(ffffffff82d69198) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d69198) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002430a4c0,ffff80000067c100) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge24_untramp() at Xintr_ioapic_edge24_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc intr_handler(ffff80002430a620,ffff80000006ba00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f Xspllower() at Xspllower+0x1d cnputc(63) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(63) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6bc sys/kern/subr_prf.c:724 db_printf(ffffffff828128e4) at db_printf+0x89 sys/kern/subr_prf.c:498 end trace frame: 0xffff80002430aa10, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82bb7ff0) 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+0x23 __mp_lock(ffffffff82d69198) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d69198) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002430a4c0,ffff80000067c100) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge24_untramp() at Xintr_ioapic_edge24_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc intr_handler(ffff80002430a620,ffff80000006ba00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f Xspllower() at Xspllower+0x1d cnputc(63) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(63) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6bc sys/kern/subr_prf.c:724 db_printf(ffffffff828128e4) at db_printf+0x89 sys/kern/subr_prf.c:498 panic(ffffffff8278438b) at panic+0xdb sys/kern/subr_prf.c:216 vop_generic_badop(ffff80002430aa48) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd8066d05460,fffffd8077d70138) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd8077d70138) at bwrite+0x1f4 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd8077d70138) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002430ace0) at ufs_mkdir+0x6c4 sys/ufs/ufs/ufs_vnops.c:1235 VOP_MKDIR(fffffd8066a772e8,ffff80002430ae40,ffff80002430ae70,ffff80002430ad70) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff800021236020,ffffff9c,74279bb72170,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3074 syscall(ffff80002430aff0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002430aff0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74279bb721e0, count: -24 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(ffffffff82790103) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8280f6e9,ffffffff827d18e0,2a3,ffffffff827c9724) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: 11 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82790103) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8280f6e9,ffffffff827d18e0,2a3,ffffffff827c9724) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: -4