kernel: protection fault trap, code=0 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace witness_checkorder(fffffd806f1b7010,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f1b7000) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff8000212397e8,fffffd806f1b7000,fffffd806f1b7088,5,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000212397e8,5) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000212397e8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000212397e8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000212397e8,ffff80002afd7270,ffff80002afd72c0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002afd7340) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002afd7340) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d8aae5ca740, count: -9 ddb{0}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff80002afd7010 rbx 0xe rdx 0 rcx 0xffff8000212397e8 rax 0xffffffff82bc7ff0 cpu_info_full_primary+0x1ff0 r8 0x1 r9 0 r10 0xde1c7d4e2563eabb r11 0xda237b6ae43af2c1 r12 0 r13 0xfffffd806f1b7010 r14 0x1004808610008086 r15 0xffff8000212397e8 rip 0xffffffff81591c4c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002afd6f60 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{0}> show proc PROC (syz-executor.2) pid=317620 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff800021225d58,0xffffffff82d1fca8 process=0xffff8000ffff50e0 user=0xffff80002afd2000, vmspace=0xfffffd80654aecd8 estcpu=32, cpticks=3, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 23787 98255 0 0 3 0x14200 bored sosplice 67783 95653 55713 32767 3 0x90 nanoslp syz-executor.6 11160 109828 20268 32767 3 0x90 nanoslp syz-executor.7 55713 56688 9567 0 3 0x82 wait syz-executor.6 20268 207842 9567 0 3 0x82 wait syz-executor.7 51088 225437 16025 32767 2 0x10 syz-executor.4 72899 421691 42907 32767 2 0x10 syz-executor.5 16025 460454 9567 0 3 0x82 wait syz-executor.4 42907 169938 9567 0 3 0x82 wait syz-executor.5 18038 408068 2209 32767 2 0x10 syz-executor.3 63485 197481 62259 32767 3 0x90 nanoslp syz-executor.2 2209 70561 9567 0 3 0x82 wait syz-executor.3 63107 2929 56471 32767 7 0x10 syz-executor.1 62259 204812 9567 0 3 0x82 wait syz-executor.2 2405 13339 8717 32767 2 0x10 syz-executor.0 56471 17130 9567 0 3 0x82 wait syz-executor.1 8717 321196 9567 0 3 0x82 wait syz-executor.0 9567 262979 84688 0 3 0x2000082 thrsleep syz-fuzzer 9567 10772 84688 0 3 0x6000082 nanoslp syz-fuzzer 9567 108256 84688 0 3 0x6000082 thrsleep syz-fuzzer 9567 316837 84688 0 3 0x6000082 wait syz-fuzzer 9567 147548 84688 0 3 0x6000082 wait syz-fuzzer 9567 523819 84688 0 3 0x6000082 thrsleep syz-fuzzer 9567 119526 84688 0 3 0x6000082 wait syz-fuzzer 9567 44520 84688 0 3 0x6000082 wait syz-fuzzer 9567 519201 84688 0 3 0x6000082 wait syz-fuzzer 9567 520566 84688 0 3 0x6000082 wait syz-fuzzer 9567 105106 84688 0 3 0x6000082 thrsleep syz-fuzzer 9567 65741 84688 0 3 0x6000082 wait syz-fuzzer 9567 430571 84688 0 3 0x6000082 wait syz-fuzzer 9567 227180 84688 0 3 0x6000082 thrsleep syz-fuzzer 9567 467652 84688 0 3 0x6000082 thrsleep syz-fuzzer 9567 395074 84688 0 2 0x6000082 syz-fuzzer 84688 25440 27660 0 3 0x10008a sigsusp ksh 27660 22252 59855 0 3 0x9a kqread sshd 15002 203413 1 0 3 0x100083 ttyin getty 59855 87951 1 0 3 0x88 kqread sshd 80632 240841 58262 73 3 0x1100090 kqread syslogd 58262 400381 1 0 3 0x100082 netio syslogd 3028 9683 1 0 3 0x100080 kqread resolvd 88768 298924 35444 77 3 0x100092 kqread dhcpleased 71697 506666 35444 77 3 0x100092 kqread dhcpleased 35444 2867 1 0 3 0x80 kqread dhcpleased 60970 156802 0 0 3 0x14200 bored smr 42894 66909 0 0 2 0x14200 zerothread 85797 214745 0 0 3 0x14200 aiodoned aiodoned 44940 488470 0 0 3 0x14200 syncer update 5545 485847 0 0 3 0x14200 cleaner cleaner 80213 105498 0 0 2 0x14200 reaper 66421 12170 0 0 3 0x14200 pgdaemon pagedaemon 19620 281591 0 0 3 0x14200 bored viomb 62533 295747 0 0 3 0x40014200 acpi0 acpi0 91790 518159 0 0 3 0x40014200 idle1 68142 402768 0 0 3 0x14200 bored softnet3 27952 128856 0 0 3 0x14200 bored softnet2 18775 166598 0 0 3 0x14200 bored softnet1 55516 519975 0 0 2 0x14200 softnet0 15360 477176 0 0 3 0x14200 bored systqmp 86149 114560 0 0 3 0x14200 bored systq 50241 378344 0 0 2 0x40014200 softclock 54247 434986 0 0 3 0x40014200 idle0 1 170543 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 18038 (syz-executor.3) thread 0xffff8000212242c8 (408068) exclusive rrwlock inode r = 0 (0xfffffd8067da1098) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80671930a0) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #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:3058 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10195 6410K 6420K 78643K 11273 0 pcb 13 10K 12K 78643K 15 0 rtable 238 6K 6K 78643K 368 0 pf 29 8K 8K 78643K 29 0 ifaddr 44 15K 15K 78643K 46 0 ifgroup 50 2K 2K 78643K 50 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 60 0 ioctlops 0 0K 2K 78643K 32 0 iov 0 0K 10K 78643K 69 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1278 80K 80K 78643K 1485 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 26 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 75 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 19 69K 129K 78643K 1227 0 sigio 0 0K 0K 78643K 21 0 proc 56 78K 115K 78643K 587 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 40 0 in_multi 99 7K 7K 78643K 107 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 109 493K 493K 78643K 109 0 exec 0 0K 1K 78643K 518 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 329 86K 88K 78643K 14264 0 UVM aobj 129 6K 6K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 10 0 NDP 11 0K 2K 78643K 27 0 temp 74 5920K 5985K 78643K 6490 0 kqueue 12 18K 24K 78643K 84 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 62 0 59 1 0 1 1 0 8 0 rtentry 112 113 0 1 4 0 4 4 0 8 0 unpcb 144 863 0 850 6 3 3 6 0 8 2 syncache 304 39 0 39 3 3 0 1 0 8 0 tcpqe 32 1221 0 1221 3 3 0 1 0 8 0 tcpcb 808 1225 0 1207 16 6 10 15 0 8 8 arp 120 18 0 0 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 12 0 6 1 0 1 1 0 8 0 inpcb 368 1533 0 1515 15 4 11 14 0 8 8 nd6 136 26 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 465 0 0 30 0 30 30 0 8 0 art_table 32 466 0 0 4 0 4 4 0 8 0 art_node 16 112 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 0 1 0 1 1 0 8 0 semapl 112 73 0 63 1 0 1 1 0 8 0 shmpl 112 128 0 2 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2872 0 1433 91 0 91 91 0 8 0 ffsino 272 2872 0 1433 97 0 97 97 0 8 0 nchpl 144 4523 0 2842 63 0 63 63 0 8 0 uvmvnodes 80 2985 0 0 61 0 61 61 0 8 0 vnodes 216 2985 0 0 166 0 166 166 0 8 0 namei 1024 14400 0 14399 3 2 1 2 0 8 0 percpumem 16 43 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 13891 0 13891 10 9 1 8 1 8 1 plimitpl 152 258 0 235 3 1 2 2 0 8 1 sigapl 424 1523 0 1472 7 0 7 7 0 8 0 futexpl 64 8967 0 8967 1 0 1 1 0 8 1 knotepl 120 149 0 0 5 0 5 5 0 8 1 kqueuepl 216 137 0 129 1 0 1 1 0 8 0 pipepl 320 316 0 288 8 5 3 8 0 8 0 fdescpl 496 1505 0 1475 7 2 5 6 0 8 0 filepl 152 8375 0 8138 22 7 15 22 0 8 5 lockfpl 104 49 0 47 1 0 1 1 0 8 0 lockfspl 48 20 0 18 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 31 0 15 1 0 1 1 0 8 0 ucredpl 104 1188 0 1170 1 0 1 1 0 8 0 zombiepl 144 1476 0 1472 1 0 1 1 0 8 0 processpl 1072 1523 0 1472 5 0 5 5 0 8 0 procpl 680 3583 0 3516 8 0 8 8 0 8 0 sosppl 168 25 0 25 2 1 1 1 0 8 1 sockpl 488 2632 0 2598 53 38 15 35 0 8 8 mcl64k 65536 10 0 0 2 0 2 2 0 8 0 mcl16k 16384 10 0 0 2 0 2 2 0 8 0 mcl12k 12288 11 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 13 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 307 0 0 39 0 39 39 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 1047 0 0 64 0 64 64 0 8 0 bufpl 288 5425 0 139 378 0 378 378 0 8 0 anonpl 24 293665 0 282808 94 12 82 92 0 186 7 amapchunkpl 152 45926 0 45112 41 1 40 41 0 158 2 amappl16 200 7480 0 7171 28 10 18 28 0 8 1 amappl15 192 51 0 50 1 0 1 1 0 8 0 amappl14 184 165 0 151 2 1 1 2 0 8 0 amappl13 176 10 0 10 1 1 0 1 0 8 0 amappl12 168 2128 0 2097 2 0 2 2 0 8 0 amappl11 160 113 0 103 1 0 1 1 0 8 0 amappl10 152 50 0 40 1 0 1 1 0 8 0 amappl9 144 209 0 207 1 0 1 1 0 8 0 amappl8 136 219 0 158 3 0 3 3 0 8 0 amappl7 128 87 0 71 2 0 2 2 0 8 0 amappl6 120 223 0 208 2 1 1 2 0 8 0 amappl5 112 198 0 188 1 0 1 1 0 8 0 amappl4 104 557 0 522 2 0 2 2 0 8 0 amappl3 96 9496 0 9421 4 1 3 4 0 8 0 amappl2 88 1763 0 1699 3 1 2 3 0 8 0 amappl1 80 13643 0 13129 22 9 13 22 0 8 0 amappl 88 13727 0 13510 7 0 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 2 3 0 3 3 0 8 0 uaddrrnd 24 1505 0 1475 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1505 0 1475 1 0 1 1 0 8 0 vmmpekpl 168 16862 0 16811 3 0 3 3 0 8 0 vmmpepl 168 108558 0 106444 123 15 108 115 0 357 1 vmsppl 464 1504 0 1475 7 2 5 6 0 8 0 rwobjpl 56 37393 0 32988 68 4 64 64 0 8 0 pdppl 4096 3018 0 2950 130 48 82 98 0 8 14 pvpl 32 675639 0 659215 363 56 307 361 0 265 155 pmappl 248 1504 0 1475 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 887 0 62 24 0 24 24 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(fffffd806f1b7010,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f1b7000) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff8000212397e8,fffffd806f1b7000,fffffd806f1b7088,5,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000212397e8,5) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000212397e8) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000212397e8,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000212397e8,ffff80002afd7270,ffff80002afd72c0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002afd7340) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002afd7340) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d8aae5ca740, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d58ff0) 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(ffffffff82d6d010) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d6d010) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002470b190) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002470b190) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7807464fe570, count: -6