kernel: protection fault trap, code=0 Stopped at witness_checkorder+0x4f5: movl 0x10(%r14),%ecx ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace witness_checkorder(fffffd8062ccf7f0,9,0) at witness_checkorder+0x4f5 witness_lock_order_check sys/kern/subr_witness.c:2442 [inline] witness_checkorder(fffffd8062ccf7f0,9,0) at witness_checkorder+0x4f5 sys/kern/subr_witness.c:890 rw_enter(fffffd8062ccf7e0,1) at rw_enter+0xd5 sys/kern/kern_rwlock.c:249 rwsleep(fffffd8062ccf920,fffffd8062ccf7e0,118,ffffffff82823a05,0) at rwsleep+0xd6 sys/kern/kern_synch.c:303 sosend(fffffd8062ccf7d8,0,ffff8000211f1778,0,0,0) at sosend+0x76b sys/kern/uipc_socket.c:623 fifo_write(ffff8000211f16c0) at fifo_write+0x80 sys/miscfs/fifofs/fifo_vnops.c:279 VOP_WRITE(fffffd80789b7528,ffff8000211f1778,3,fffffd807f7d7548) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000211a22b0,fffffd80789b7528,fffffd807f7d7548,ffff8000211f1848,ffff8000211f1820) at ktrwriteraw+0x16c sys/kern/kern_ktrace.c:664 ktrgenio(ffff8000211a22b0,7,0,ffff800000d6bd40,1ad) at ktrgenio+0x272 ktrwrite2 sys/kern/kern_ktrace.c:626 [inline] ktrgenio(ffff8000211a22b0,7,0,ffff800000d6bd40,1ad) at ktrgenio+0x272 sys/kern/kern_ktrace.c:258 dofilereadv(ffff8000211a22b0,7,ffff8000211f19b8,0,ffff8000211f1aa0) at dofilereadv+0x2e7 sys/kern/sys_generic.c:263 sys_read(ffff8000211a22b0,ffff8000211f1a50,ffff8000211f1aa0) at sys_read+0x87 sys/kern/sys_generic.c:167 syscall(ffff8000211f1b20) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000211f1b20) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cdf4ce9c950, count: -12 ddb{1}> show registers rdi 0xffffffff rsi 0xffffffff rbp 0xffff8000211f1440 rbx 0xffffffff rdx 0 rcx 0xc rax 0xfffffd80031fa000 r8 0xffffffffffffffff r9 0x1 r10 0xcf798d72c0f6ec6d r11 0x643cf8b0ebf4ac7b r12 0xfffffd80031d2300 r13 0xfffffd8062ccf7f0 r14 0xdeaf4152deaf4152 r15 0xfffffd80039c1b50 rip 0xffffffff8169cdd5 witness_checkorder+0x4f5 cs 0x8 rflags 0x10212 __ALIGN_SIZE+0xf212 rsp 0xffff8000211f1390 ss 0x10 witness_checkorder+0x4f5: movl 0x10(%r14),%ecx ddb{1}> show proc PROC (sshd) tid=39192 pid=92759 tcnt=1 stat=onproc flags process=12 proc=1 runpri=24, usrpri=50, slppri=24, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff8000211ebd48,0xffff8000211a2018 process=0xffff800021223250 user=0xffff8000211ec000, vmspace=0xfffffd806d6081e0 estcpu=0, cpticks=1, pctcpu=0.17, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 98842 260815 37289 0 2 0 syz-executor.2 61958 46924 74896 0 2 0 syz-executor.5 61958 274973 74896 0 3 0x4000080 kqread syz-executor.5 76491 479674 73650 0 3 0x80 nanoslp syz-executor.7 76491 269571 73650 0 3 0x4000080 fsleep syz-executor.7 76491 498843 73650 0 3 0x4000080 fsleep syz-executor.7 42000 222069 18051 0 3 0x82 nanoslp syz-executor.1 31931 108103 18051 0 2 0x83 syz-executor.4 4600 524196 0 0 3 0x14280 nfsidl nfsio 37192 241182 0 0 3 0x14280 nfsidl nfsio 52516 374946 0 0 3 0x14280 nfsidl nfsio 61022 161868 0 0 3 0x14280 nfsidl nfsio 25903 53160 0 0 3 0x14280 nfsidl nfsio 20996 1445 0 0 3 0x14280 nfsidl nfsio 18804 22376 0 0 3 0x14280 nfsidl nfsio 5982 320108 0 0 3 0x14280 nfsidl nfsio 21848 80800 0 0 3 0x14280 nfsidl nfsio 12685 192284 0 0 3 0x14280 nfsidl nfsio 84307 484504 0 0 3 0x14280 nfsidl nfsio 43397 175214 0 0 3 0x14280 nfsidl nfsio 32954 509634 0 0 3 0x14280 nfsidl nfsio 77033 79921 0 0 3 0x14280 nfsidl nfsio 21302 468886 0 0 3 0x14280 nfsidl nfsio 5003 371514 0 0 3 0x14280 nfsidl nfsio 61290 75319 0 0 3 0x14280 nfsidl nfsio 68625 521389 0 0 3 0x14280 nfsidl nfsio 63147 52599 0 0 3 0x14280 nfsidl nfsio 14841 86375 0 0 3 0x14280 nfsidl nfsio 49189 452650 0 0 3 0x14200 bored sosplice 65803 425942 18051 0 3 0x82 piperd syz-executor.0 17569 135758 18051 0 2 0x2 syz-executor.6 73650 328231 18051 0 2 0x2 syz-executor.7 74896 67416 18051 0 3 0x82 nanoslp syz-executor.5 27943 516551 18051 0 3 0x82 piperd syz-executor.3 37289 63350 18051 0 3 0x82 nanoslp syz-executor.2 18051 391034 10269 0 3 0x2000082 wait syz-fuzzer 18051 215038 10269 0 3 0x6000082 nanoslp syz-fuzzer 18051 130985 10269 0 3 0x6000082 thrsleep syz-fuzzer 18051 139047 10269 0 3 0x6000082 wait syz-fuzzer 18051 85429 10269 0 3 0x6000082 wait syz-fuzzer 18051 516702 10269 0 3 0x6000082 wait syz-fuzzer 18051 268312 10269 0 2 0x6000083 syz-fuzzer 18051 371855 10269 0 3 0x6000082 wait syz-fuzzer 18051 356614 10269 0 3 0x6000082 thrsleep syz-fuzzer 18051 276005 10269 0 3 0x6000082 thrsleep syz-fuzzer 18051 419639 10269 0 3 0x6000082 thrsleep syz-fuzzer 18051 462389 10269 0 3 0x6000082 wait syz-fuzzer 18051 178762 10269 0 3 0x6000082 wait syz-fuzzer 18051 519699 10269 0 3 0x6000082 wait syz-fuzzer 18051 384626 10269 0 3 0x6000082 thrsleep syz-fuzzer 18051 423636 10269 0 2 0x6000083 syz-fuzzer 10269 44863 92759 0 3 0x10008a sigsusp ksh *92759 39192 79499 0 7 0x13 sshd 43687 433120 1 0 3 0x100083 ttyin getty 79499 507291 1 0 3 0x88 kqread sshd 50475 243802 2267 74 3 0x1100092 bpf pflogd 2267 394763 1 0 3 0x80 netio pflogd 82016 131662 78077 73 3 0x1100090 kqread syslogd 78077 290277 1 0 3 0x100082 netio syslogd 68070 517197 1 0 3 0x100080 kqread resolvd 1632 41750 49224 77 3 0x100092 kqread dhcpleased 29718 514953 49224 77 3 0x100092 kqread dhcpleased 49224 233320 1 0 3 0x80 kqread dhcpleased 59561 170224 0 0 3 0x14200 bored smr 20849 49026 0 0 2 0x14200 zerothread 26919 363505 0 0 3 0x14200 aiodoned aiodoned 87642 352317 0 0 3 0x14200 syncer update 31580 74768 0 0 3 0x14200 cleaner cleaner 34691 24607 0 0 7 0x14200 reaper 11072 172164 0 0 3 0x14200 pgdaemon pagedaemon 88691 490742 0 0 3 0x14200 bored viomb 72728 439762 0 0 3 0x40014200 acpi0 acpi0 72250 159745 0 0 3 0x40014200 idle1 17323 95334 0 0 3 0x14200 bored softnet3 98395 415994 0 0 3 0x14200 bored softnet2 88101 45650 0 0 3 0x14200 bored softnet1 99715 416994 0 0 3 0x14200 bored softnet0 69995 160888 0 0 3 0x14200 bored systqmp 29058 491720 0 0 3 0x14200 bored systq 44161 144546 0 0 3 0x14200 tmoslp softclockmp 51936 179276 0 0 3 0x40014200 tmoslp softclock 67556 74462 0 0 3 0x40014200 idle0 1 282622 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 92759 (sshd) thread 0xffff8000211a22b0 (39192) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82cd7740) #0 witness_lock+0x447 #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x46d sys/kern/sched_bsd.c:470 #3 sleep_finish+0x19b sys/kern/kern_synch.c:414 #4 rwsleep+0xab sys/kern/kern_synch.c:300 #5 sosend+0x76b sys/kern/uipc_socket.c:623 #6 fifo_write+0x80 sys/miscfs/fifofs/fifo_vnops.c:279 #7 VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 #8 ktrwriteraw+0x16c sys/kern/kern_ktrace.c:664 #9 ktrgenio+0x272 ktrwrite2 sys/kern/kern_ktrace.c:626 [inline] #9 ktrgenio+0x272 sys/kern/kern_ktrace.c:258 #10 dofilereadv+0x2e7 sys/kern/sys_generic.c:263 #11 sys_read+0x87 sys/kern/sys_generic.c:167 #12 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] #12 syscall+0x606 sys/arch/amd64/amd64/trap.c:623 #13 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10199 6491K 7012K 78643K 15990 0 pcb 13 15K 17K 78643K 129 0 rtable 241 7K 7K 78643K 556 0 pf 32 9K 10K 78643K 88 0 ifaddr 45 15K 15K 78643K 77 0 ifgroup 55 2K 2K 78643K 128 0 sysctl 3 0K 0K 78643K 3 0 counters 60 35K 36K 78643K 98 0 ioctlops 0 0K 4K 78643K 1660 0 iov 0 0K 16K 78643K 412 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1381 86K 87K 78643K 3212 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 43 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 368 0 dirhash 12 2K 2K 78643K 33 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 81K 78643K 3236 0 sigio 0 0K 0K 78643K 92 0 proc 71 91K 115K 78643K 828 0 subproc 104 6K 6K 78643K 145 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 122 0 in_multi 99 7K 7K 78643K 150 0 ether_multi 1 0K 0K 78643K 1 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 73 334K 334K 78643K 73 0 exec 0 0K 1K 78643K 1032 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 388 141K 142K 78643K 34175 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 64 0 NDP 12 0K 1K 78643K 53 0 temp 82 5928K 6000K 78643K 21707 0 kqueue 13 20K 24K 78643K 237 0 SYN cache 2 824K 832K 78643K 3 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 120 242 0 239 4 3 1 3 0 8 0 rtentry 112 150 0 38 4 0 4 4 0 8 0 unpcb 144 2868 0 2853 33 27 6 10 0 8 5 syncache 304 25 0 25 6 5 1 1 0 8 1 tcpqe 32 2028 0 2028 7 6 1 1 0 8 1 tcpcb 808 844 0 833 19 14 5 9 0 8 3 arp 120 25 0 6 1 0 1 1 0 8 0 inpcb 368 4695 0 4680 38 28 10 14 0 8 8 nd6 136 35 0 10 1 0 1 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1256 5 0 5 2 2 0 1 0 8 0 pffrag 232 2 0 1 1 0 1 1 0 482 0 pffrnode 88 2 0 1 1 0 1 1 0 8 0 pffrent 40 15 0 14 1 0 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 24 105 0 75 1 0 1 1 0 8 0 pfstkey 128 105 0 75 2 0 2 2 0 8 0 pfstate 376 105 0 75 5 1 4 4 0 8 0 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 256 602 0 139 29 0 29 29 0 8 0 art_table 32 603 0 139 4 0 4 4 0 8 0 art_node 16 146 0 44 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 16 1 0 1 1 0 8 0 semapl 112 366 0 356 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 5591 0 4124 92 0 92 92 0 8 0 ffsino 272 5591 0 4124 98 0 98 98 0 8 0 nchpl 144 10011 0 9511 63 40 23 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 34265 0 34265 4 3 1 2 0 8 1 percpumem 16 62 0 19 1 0 1 1 0 8 0 vcpupl 2048 17 0 0 3 0 3 3 0 8 0 vmpool 696 17 0 0 2 0 2 2 0 8 0 kstatmem 264 62 0 38 2 0 2 2 0 8 0 scxspl 216 28403 0 28403 10 9 1 8 1 8 1 plimitpl 152 488 0 472 1 0 1 1 0 8 0 sigapl 424 3578 0 3512 11 3 8 8 0 8 0 futexpl 64 26812 0 26810 1 0 1 1 0 8 0 knotepl 120 218 0 0 7 1 6 7 0 8 0 kqueuepl 216 810 0 801 15 10 5 5 0 8 4 pipepl 320 798 0 770 30 25 5 14 0 8 2 fdescpl 496 3539 0 3513 6 2 4 5 0 8 0 filepl 152 23110 0 22870 53 35 18 21 0 8 8 lockfpl 104 1294 0 1292 3 2 1 2 0 8 0 lockfspl 48 544 0 542 1 0 1 1 0 8 0 sessionpl 144 27 0 10 1 0 1 1 0 8 0 pgrppl 48 45 0 28 1 0 1 1 0 8 0 ucredpl 104 2529 0 2516 1 0 1 1 0 8 0 zombiepl 144 3513 0 3512 1 0 1 1 0 8 0 processpl 1072 3578 0 3512 6 1 5 5 0 8 0 procpl 680 9259 0 9174 11 2 9 9 0 8 1 sosppl 168 35 0 35 3 2 1 1 0 8 1 sockpl 488 7883 0 7850 161 148 13 34 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 14 0 0 2 0 2 2 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 9 0 0 1 0 1 1 0 8 0 mcl8k 8192 16 0 0 2 0 2 2 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 255 0 0 31 0 31 31 0 8 0 mtagpl 96 387 0 0 10 0 10 10 0 8 0 mbufpl 256 678 0 0 36 0 36 36 0 8 0 bufpl 288 8070 0 1746 452 0 452 452 0 8 0 anonpl 24 494441 0 480393 162 57 105 111 0 186 0 amapchunkpl 152 107412 0 106562 54 13 41 41 0 158 2 amappl16 200 12585 0 12161 74 50 24 36 0 8 1 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 182 0 166 2 1 1 2 0 8 0 amappl13 176 14 0 14 1 1 0 1 0 8 0 amappl12 168 4274 0 4243 3 1 2 2 0 8 0 amappl11 160 56 0 42 1 0 1 1 0 8 0 amappl10 152 27 0 16 1 0 1 1 0 8 0 amappl9 144 193 0 190 1 0 1 1 0 8 0 amappl8 136 367 0 270 4 0 4 4 0 8 0 amappl7 128 239 0 214 3 1 2 3 0 8 0 amappl6 120 343 0 332 1 0 1 1 0 8 0 amappl5 112 177 0 166 1 0 1 1 0 8 0 amappl4 104 531 0 499 3 2 1 2 0 8 0 amappl3 96 21345 0 21265 5 2 3 3 0 8 0 amappl2 88 4097 0 4021 4 2 2 4 0 8 0 amappl1 80 20899 0 20349 23 10 13 23 0 8 0 amappl 88 33505 0 33279 9 2 7 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 3556 0 3512 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3556 0 3512 1 0 1 1 0 8 0 vmmpekpl 168 33295 0 33230 4 0 4 4 0 8 0 vmmpepl 168 228127 0 225814 182 70 112 143 0 357 2 vmsppl 464 3555 0 3512 7 1 6 6 0 8 0 rwobjpl 56 68783 0 61169 113 3 110 111 0 8 0 pdppl 4096 7120 0 7041 235 149 86 86 0 8 7 pvpl 32 1177744 0 1158043 422 237 185 366 0 265 3 pmappl 248 3555 0 3512 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1067 0 200 25 0 25 25 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82c49ff0) 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(ffffffff82cd7538) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cd7538) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff8000211afa80,ffff80000027b700) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f __mp_lock(ffffffff82cd7538) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cd7538) at __mp_lock+0x122 sys/kern/kern_lock.c:147 reaper(ffff8000211a37f0) at reaper+0x160 sys/kern/kern_exit.c:446 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0x4f5: movl 0x10(%r14),%ecx ddb{1}> trace witness_checkorder(fffffd8062ccf7f0,9,0) at witness_checkorder+0x4f5 witness_lock_order_check sys/kern/subr_witness.c:2442 [inline] witness_checkorder(fffffd8062ccf7f0,9,0) at witness_checkorder+0x4f5 sys/kern/subr_witness.c:890 rw_enter(fffffd8062ccf7e0,1) at rw_enter+0xd5 sys/kern/kern_rwlock.c:249 rwsleep(fffffd8062ccf920,fffffd8062ccf7e0,118,ffffffff82823a05,0) at rwsleep+0xd6 sys/kern/kern_synch.c:303 sosend(fffffd8062ccf7d8,0,ffff8000211f1778,0,0,0) at sosend+0x76b sys/kern/uipc_socket.c:623 fifo_write(ffff8000211f16c0) at fifo_write+0x80 sys/miscfs/fifofs/fifo_vnops.c:279 VOP_WRITE(fffffd80789b7528,ffff8000211f1778,3,fffffd807f7d7548) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000211a22b0,fffffd80789b7528,fffffd807f7d7548,ffff8000211f1848,ffff8000211f1820) at ktrwriteraw+0x16c sys/kern/kern_ktrace.c:664 ktrgenio(ffff8000211a22b0,7,0,ffff800000d6bd40,1ad) at ktrgenio+0x272 ktrwrite2 sys/kern/kern_ktrace.c:626 [inline] ktrgenio(ffff8000211a22b0,7,0,ffff800000d6bd40,1ad) at ktrgenio+0x272 sys/kern/kern_ktrace.c:258 dofilereadv(ffff8000211a22b0,7,ffff8000211f19b8,0,ffff8000211f1aa0) at dofilereadv+0x2e7 sys/kern/sys_generic.c:263 sys_read(ffff8000211a22b0,ffff8000211f1a50,ffff8000211f1aa0) at sys_read+0x87 sys/kern/sys_generic.c:167 syscall(ffff8000211f1b20) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000211f1b20) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cdf4ce9c950, count: -12