kernel: protection fault trap, code=0 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx 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(fffffd8070c6d958,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd8070c6d948) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021225540,fffffd8070c6d948,fffffd8070c6d9d0,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021225540,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021225540) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021225540,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021225540,ffff80002e44bae0,ffff80002e44bb30) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e44bbb0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e44bbb0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7724099923e0, count: -9 ddb{1}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff80002e44b880 rbx 0xe rdx 0 rcx 0xffff800021225540 rax 0xffff800020d58ff0 r8 0x1 r9 0x1 r10 0xc646c39b43149f02 r11 0x22b2d3c223ab9c6d r12 0 r13 0xfffffd8070c6d958 r14 0xfffeffff00010000 r15 0xffff800021225540 rip 0xffffffff81eeff1c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e44b7d0 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{1}> show proc PROC (syz-executor.7) pid=436415 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff800021290ff8,0xffff8000211ee2c8 process=0xffff80002121c870 user=0xffff80002e446000, vmspace=0xfffffd806bb92af8 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 42087 69746 36019 32767 2 0x10 syz-executor.1 42087 269134 36019 32767 3 0x4000090 fsleep syz-executor.1 42087 486180 36019 32767 7 0x4000010 syz-executor.1 95219 290528 89040 32767 2 0x10 syz-executor.0 95219 195950 89040 32767 3 0x4000090 fifow syz-executor.0 76135 427086 64288 32767 3 0x90 nanoslp syz-executor.2 64288 35622 81915 0 3 0x82 wait syz-executor.2 52978 263757 32556 32767 2 0x10 syz-executor.3 32556 387979 81915 0 3 0x82 wait syz-executor.3 52132 133178 77118 32767 3 0x10 biowait syz-executor.4 77118 330728 81915 0 3 0x82 wait syz-executor.4 33408 150045 16356 32767 3 0x10 biowait syz-executor.5 16356 384649 81915 0 3 0x82 wait syz-executor.5 94462 493190 0 0 3 0x14200 bored sosplice 76967 11831 11499 32767 3 0x90 nanoslp syz-executor.7 86221 320861 56848 32767 2 0x10 syz-executor.6 11499 228109 81915 0 3 0x82 wait syz-executor.7 56848 479134 81915 0 3 0x82 wait syz-executor.6 36019 271099 49268 32767 3 0x90 nanoslp syz-executor.1 49268 351757 81915 0 3 0x82 wait syz-executor.1 89040 343440 58218 32767 3 0x90 nanoslp syz-executor.0 58218 283536 81915 0 3 0x82 wait syz-executor.0 81915 256061 21265 0 3 0x2000082 wait syz-fuzzer 81915 38551 21265 0 3 0x6000082 nanoslp syz-fuzzer 81915 488803 21265 0 3 0x6000082 wait syz-fuzzer 81915 3892 21265 0 3 0x6000082 thrsleep syz-fuzzer 81915 341490 21265 0 3 0x6000082 wait syz-fuzzer 81915 332192 21265 0 3 0x6000082 kqread syz-fuzzer 81915 276140 21265 0 3 0x6000082 thrsleep syz-fuzzer 81915 422390 21265 0 3 0x6000082 wait syz-fuzzer 81915 486491 21265 0 3 0x6000082 thrsleep syz-fuzzer 81915 363421 21265 0 3 0x6000082 thrsleep syz-fuzzer 81915 94024 21265 0 3 0x6000082 thrsleep syz-fuzzer 81915 450141 21265 0 3 0x6000082 wait syz-fuzzer 81915 112378 21265 0 3 0x6000082 wait syz-fuzzer 81915 303343 21265 0 3 0x6000082 wait syz-fuzzer 81915 285473 21265 0 3 0x6000082 thrsleep syz-fuzzer 81915 173749 21265 0 3 0x6000082 wait syz-fuzzer 21265 461902 49944 0 3 0x10008a sigsusp ksh 49944 306859 74980 0 3 0x9a kqread sshd 47747 271814 1 0 3 0x100083 ttyin getty 74980 89025 1 0 3 0x88 kqread sshd 60079 157237 17175 73 3 0x1100090 kqread syslogd 17175 276586 1 0 3 0x100082 netio syslogd 2095 495186 1 0 3 0x100080 kqread resolvd 4847 200303 76037 77 3 0x100092 kqread dhcpleased 7924 404881 76037 77 3 0x100092 kqread dhcpleased 76037 374336 1 0 3 0x80 kqread dhcpleased 60523 519975 0 0 3 0x14200 bored smr 15123 296915 0 0 2 0x14200 zerothread 63220 400981 0 0 3 0x14200 aiodoned aiodoned 88006 328078 0 0 3 0x14200 syncer update 26770 55421 0 0 3 0x14200 cleaner cleaner 35086 336356 0 0 2 0x14200 reaper 71199 122589 0 0 3 0x14200 pgdaemon pagedaemon 66792 473525 0 0 3 0x14200 bored viomb 88771 188944 0 0 3 0x40014200 acpi0 acpi0 56701 128447 0 0 3 0x40014200 idle1 31706 73907 0 0 3 0x14200 bored softnet3 69171 480408 0 0 3 0x14200 bored softnet2 66598 309816 0 0 3 0x14200 bored softnet1 85348 379533 0 0 3 0x14200 bored softnet0 50282 357477 0 0 3 0x14200 bored systqmp 62167 51983 0 0 3 0x14200 bored systq 45073 285526 0 0 3 0x40014200 bored softclock 29997 126547 0 0 3 0x40014200 idle0 1 359235 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 42087 (syz-executor.1) thread 0xffff80002121b560 (486180) shared rwlock vmmaplk r = 0 (0xfffffd8065f22120) #0 witness_lock+0x447 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1785 #2 uvm_fault_check+0x3e sys/uvm/uvm_fault.c:672 #3 uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 #4 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 Process 52132 (syz-executor.4) thread 0xffff800021290008 (133178) exclusive rrwlock inode r = 0 (0xfffffd80700d8d60) #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 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:1314 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 #11 namei+0x55a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807053cc58) #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 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #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 Process 33408 (syz-executor.5) thread 0xffff8000212912a0 (150045) exclusive rrwlock inode r = 0 (0xfffffd80700d8f80) #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 (0xfffffd8070540c50) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10204 6411K 6420K 78643K 11310 0 pcb 13 12K 14K 78643K 17 0 rtable 246 7K 7K 78643K 1056 0 pf 29 8K 8K 78643K 47 0 ifaddr 44 15K 15K 78643K 84 0 ifgroup 50 2K 2K 78643K 86 0 sysctl 3 1K 1K 78643K 3 0 counters 60 35K 35K 78643K 78 0 ioctlops 0 0K 2K 78643K 274 0 iov 0 0K 32K 78643K 1403 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1280 80K 80K 78643K 3228 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 130 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1562 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 21 77K 109K 78643K 12140 0 sigio 0 0K 0K 78643K 239 0 proc 56 78K 115K 78643K 1468 0 subproc 104 6K 6K 78643K 221 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1320 0 in_multi 99 7K 7K 78643K 283 0 ether_multi 1 0K 0K 78643K 11 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 163 731K 731K 78643K 163 0 exec 0 0K 1K 78643K 1727 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 449 94K 108K 78643K 122150 0 UVM aobj 131 4K 5K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 316 0 NDP 11 0K 2K 78643K 54 0 temp 74 5920K 6000K 78643K 31674 0 kqueue 12 18K 34K 78643K 2473 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 120 740 0 737 12 11 1 3 0 8 0 rtentry 112 233 0 117 4 0 4 4 0 8 0 unpcb 144 11831 0 11816 104 101 3 15 0 8 2 syncache 304 161 0 161 19 18 1 1 0 8 1 tcpqe 32 324 0 324 13 12 1 1 0 8 1 tcpcb 808 4137 0 4103 112 105 7 19 0 8 3 arp 120 39 0 20 1 0 1 1 0 8 0 ipq 40 153 0 152 8 7 1 1 0 8 0 ipqe 40 602 0 601 8 7 1 1 0 8 0 inpcb 368 7961 0 7917 150 140 10 19 0 8 5 nd6 136 71 0 42 3 1 2 2 0 8 0 kcovpl 48 17 0 9 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 931 0 452 32 1 31 31 0 8 0 art_table 32 932 0 452 4 0 4 4 0 8 0 art_node 16 232 0 126 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 0 1 0 1 1 0 8 0 semapl 112 1560 0 1550 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 17143 0 15690 92 0 92 92 0 8 0 ffsino 272 17143 0 15690 98 0 98 98 0 8 0 nchpl 144 33158 0 31512 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 123601 0 123600 6 5 1 2 0 8 0 percpumem 16 52 0 9 1 0 1 1 0 8 0 kstatmem 264 40 0 18 2 0 2 2 0 8 0 scxspl 216 103720 0 103718 50 46 4 8 1 8 3 plimitpl 152 1585 0 1562 20 18 2 2 0 8 1 sigapl 424 12419 0 12367 7 0 7 7 0 8 0 futexpl 64 99296 0 99295 3 2 1 1 0 8 0 knotepl 120 750 0 0 14 0 14 14 0 8 0 kqueuepl 216 4884 0 4876 62 57 5 7 0 8 4 pipepl 320 2876 0 2848 82 79 3 9 0 8 0 fdescpl 496 12401 0 12369 7 2 5 6 0 8 0 filepl 152 89914 0 89676 148 134 14 24 0 8 4 lockfpl 104 1977 0 1975 2 1 1 2 0 8 0 lockfspl 48 557 0 555 1 0 1 1 0 8 0 sessionpl 144 32 0 16 1 0 1 1 0 8 0 pgrppl 48 447 0 431 1 0 1 1 0 8 0 ucredpl 104 10623 0 10605 1 0 1 1 0 8 0 zombiepl 144 12370 0 12367 1 0 1 1 0 8 0 processpl 1072 12419 0 12367 4 0 4 4 0 8 0 procpl 680 34309 0 34238 27 19 8 8 0 8 1 sosppl 168 155 0 153 16 15 1 1 0 8 0 sockpl 488 21036 0 20977 404 390 14 53 0 8 5 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 21 0 0 3 1 2 3 0 8 0 mcl12k 12288 33 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 41 0 0 4 0 4 4 0 8 0 mcl4k 4096 78 0 0 6 3 3 5 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 339 0 0 31 10 21 31 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1715 0 0 77 0 77 77 0 8 0 bufpl 288 23647 0 17321 452 0 452 452 0 8 0 anonpl 24 1225042 0 1213921 195 108 87 97 0 186 0 amapchunkpl 152 399221 0 398409 122 85 37 53 0 158 1 amappl16 200 24725 0 24434 135 118 17 29 0 8 1 amappl15 192 31 0 31 1 1 0 1 0 8 0 amappl14 184 188 0 172 2 1 1 2 0 8 0 amappl13 176 20 0 20 3 3 0 1 0 8 0 amappl12 168 13175 0 13137 2 0 2 2 0 8 0 amappl11 160 63 0 52 1 0 1 1 0 8 0 amappl10 152 40 0 28 1 0 1 1 0 8 0 amappl9 144 261 0 259 1 0 1 1 0 8 0 amappl8 136 859 0 657 8 0 8 8 0 8 0 amappl7 128 110 0 93 2 0 2 2 0 8 0 amappl6 120 405 0 387 2 1 1 2 0 8 0 amappl5 112 467 0 459 1 0 1 1 0 8 0 amappl4 104 812 0 771 3 1 2 3 0 8 0 amappl3 96 75858 0 75776 4 1 3 4 0 8 0 amappl2 88 13148 0 13076 3 1 2 3 0 8 0 amappl1 80 51395 0 50864 22 9 13 22 0 8 0 amappl 88 121038 0 120798 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 12401 0 12369 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12401 0 12369 1 0 1 1 0 8 0 vmmpekpl 168 92695 0 92630 4 0 4 4 0 8 0 vmmpepl 168 717973 0 715596 243 126 117 130 0 357 0 vmsppl 464 12400 0 12369 6 1 5 5 0 8 0 rwobjpl 56 184080 0 176581 119 9 110 110 0 8 0 pdppl 4096 24810 0 24738 362 280 82 88 0 8 10 pvpl 32 3455049 0 3438032 549 394 155 350 0 265 0 pmappl 248 12400 0 12369 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1462 0 566 27 0 27 27 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82bfcff0) 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(ffffffff82d48c68) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d48c68) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff80002858ed40,ffff80000027b600) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge26_untramp() at Xintr_ioapic_edge26_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 sys/dev/kcov.c:158 __mp_lock(ffffffff82d48c68) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d48c68) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff80002858eea0,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff82d48c68) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d48c68) at __mp_lock+0x12e sys/kern/kern_lock.c:147 uvm_fault(fffffd8065f22028,2ad8a50000,0,2) at uvm_fault+0x181 sys/uvm/uvm_fault.c:622 upageflttrap(ffff80002858f220,2ad8a50000) at upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff80002858f220) at usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x2aee0517f0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{1}> trace witness_checkorder(fffffd8070c6d958,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd8070c6d948) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021225540,fffffd8070c6d948,fffffd8070c6d9d0,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021225540,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021225540) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021225540,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021225540,ffff80002e44bae0,ffff80002e44bb30) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e44bbb0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e44bbb0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7724099923e0, count: -9