witness: lock_object uninitialized: 0xffff800000d87028 Starting stack trace... witness_checkorder(ffff800000d87028,9,0) at witness_checkorder+0x137 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800000d87028,9,0) at witness_checkorder+0x137 sys/kern/subr_witness.c:777 rw_enter_write(ffff800000d87018) at rw_enter_write+0x5c sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000d87000) at unveil_delete_names+0x34 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:92 [inline] unveil_delete_names(ffff800000d87000) at unveil_delete_names+0x34 sys/kern/kern_unveil.c:102 unveil_destroy(ffff80002e454450) at unveil_destroy+0xad sys/kern/kern_unveil.c:183 exit1(ffff800021286850,0,0,3) at exit1+0x3d5 sys/kern/kern_exit.c:220 single_thread_check_locked(ffff800021286850,0,0) at single_thread_check_locked+0x237 sys/kern/kern_sig.c:2015 userret(ffff800021286850) at userret+0x7c single_thread_check sys/kern/kern_sig.c:2054 [inline] userret(ffff800021286850) at userret+0x7c sys/kern/kern_sig.c:1970 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x798b5d36fa10, count: 249 End of stack trace. Stopped at db_enter+0x1c: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff800000d87028,9,0) at witness_checkorder+0x13c witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800000d87028,9,0) at witness_checkorder+0x13c sys/kern/subr_witness.c:777 rw_enter_write(ffff800000d87018) at rw_enter_write+0x5c sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000d87000) at unveil_delete_names+0x34 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:92 [inline] unveil_delete_names(ffff800000d87000) at unveil_delete_names+0x34 sys/kern/kern_unveil.c:102 unveil_destroy(ffff80002e454450) at unveil_destroy+0xad sys/kern/kern_unveil.c:183 exit1(ffff800021286850,0,0,3) at exit1+0x3d5 sys/kern/kern_exit.c:220 single_thread_check_locked(ffff800021286850,0,0) at single_thread_check_locked+0x237 sys/kern/kern_sig.c:2015 userret(ffff800021286850) at userret+0x7c single_thread_check sys/kern/kern_sig.c:2054 [inline] userret(ffff800021286850) at userret+0x7c sys/kern/kern_sig.c:1970 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x798b5d36fa10, count: -9 ddb{1}> show registers rdi 0 rsi 0x4000000000000000 rbp 0xffff800026175c20 rbx 0x3 rdx 0 rcx 0xffff800021286850 rax 0xffff800020d58ff0 r8 0xffff800026175bc0 r9 0x8080808080808080 r10 0xffff800026175b10 r11 0xb562be243e385638 r12 0xffff800000d87001 r13 0xffff800000d87028 r14 0 r15 0 rip 0xffffffff8275560c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800026175c10 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=381405 stat=onproc flags process=1001008 proc=82000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002129d080,0xffff800021287088 process=0xffff80002e454450 user=0xffff800026170000, vmspace=0xfffffd8069918928 estcpu=36, cpticks=11, pctcpu=0.0 user=0, sys=8, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 26448 383938 16143 0 2 0 syz-executor.4 26448 360822 16143 0 3 0x4000080 fsleep syz-executor.4 26448 126145 16143 0 2 0x4000000 syz-executor.4 40531 44659 51350 0 2 0 syz-executor.5 40531 421260 51350 0 3 0x4000000 futex syz-executor.5 23944 147849 63615 0 2 0 syz-executor.1 23944 37906 63615 0 3 0x4000000 futex syz-executor.1 17587 222817 59307 0 2 0 syz-executor.2 17587 246773 59307 0 3 0x4000000 futex syz-executor.2 17587 355440 59307 0 3 0x4000080 fsleep syz-executor.2 52791 206814 73097 0 3 0 futex syz-executor.3 52791 22175 73097 0 2 0x4000000 syz-executor.3 52791 385041 73097 0 3 0x4000000 fdlock syz-executor.3 99286 103486 47334 0 2 0 syz-executor.7 99286 461223 47334 0 3 0x4000080 fsleep syz-executor.7 99286 21097 47334 0 2 0x4000000 syz-executor.7 79333 459601 44429 0 2 0 syz-executor.6 79333 226215 44429 0 7 0x4000000 syz-executor.6 85491 255729 0 0 3 0x14280 nfsidl nfsio 54839 373573 0 0 3 0x14280 nfsidl nfsio 80179 351436 0 0 3 0x14280 nfsidl nfsio 34225 483207 0 0 3 0x14280 nfsidl nfsio 35900 415410 0 0 3 0x14280 nfsidl nfsio 83079 60330 0 0 3 0x14280 nfsidl nfsio 38203 395311 0 0 3 0x14280 nfsidl nfsio 5371 429197 0 0 3 0x14280 nfsidl nfsio 44779 241305 0 0 3 0x14280 nfsidl nfsio 86378 48230 0 0 3 0x14280 nfsidl nfsio 22176 6515 0 0 3 0x14280 nfsidl nfsio 40890 443652 0 0 3 0x14280 nfsidl nfsio 18114 357256 0 0 3 0x14280 nfsidl nfsio 41726 273460 0 0 3 0x14280 nfsidl nfsio 29762 298912 0 0 3 0x14280 nfsidl nfsio 23692 246065 0 0 3 0x14280 nfsidl nfsio 30194 181018 0 0 3 0x14280 nfsidl nfsio 84578 289361 0 0 3 0x14280 nfsidl nfsio 48463 341078 0 0 3 0x14280 nfsidl nfsio 74675 372238 0 0 3 0x14280 nfsidl nfsio 64844 49588 0 0 3 0x14200 acct acct 27813 461519 0 0 3 0x14200 bored sosplice 47334 345509 29003 0 3 0x82 nanoslp syz-executor.7 16143 152875 29003 0 3 0x82 nanoslp syz-executor.4 44429 326555 29003 0 3 0x82 nanoslp syz-executor.6 73097 241445 29003 0 3 0x82 nanoslp syz-executor.3 51350 276393 29003 0 3 0x82 nanoslp syz-executor.5 59307 203379 29003 0 3 0x82 nanoslp syz-executor.2 63615 62039 29003 0 3 0x82 nanoslp syz-executor.1 23241 274443 29003 0 3 0x82 nanoslp syz-executor.0 29003 277520 42109 0 3 0x2000082 wait syz-fuzzer 29003 338953 42109 0 3 0x6000082 thrsleep syz-fuzzer 29003 435624 42109 0 3 0x6000082 wait syz-fuzzer 29003 17368 42109 0 3 0x6000082 wait syz-fuzzer 29003 91326 42109 0 3 0x6000082 wait syz-fuzzer 29003 102386 42109 0 3 0x6000082 thrsleep syz-fuzzer 29003 298959 42109 0 3 0x6000082 wait syz-fuzzer 29003 434642 42109 0 3 0x6000082 wait syz-fuzzer 29003 348329 42109 0 3 0x6000082 thrsleep syz-fuzzer 29003 220049 42109 0 3 0x6000082 thrsleep syz-fuzzer 29003 296796 42109 0 3 0x6000082 thrsleep syz-fuzzer 29003 329597 42109 0 3 0x6000082 wait syz-fuzzer 29003 383930 42109 0 3 0x6000082 wait syz-fuzzer 29003 71940 42109 0 3 0x6000082 kqread syz-fuzzer 29003 673 42109 0 3 0x6000082 thrsleep syz-fuzzer 42109 101620 19161 0 3 0x10008a sigsusp ksh 19161 349766 39114 0 3 0x9a kqread sshd 68529 132736 1 0 3 0x100083 ttyin getty 39114 455604 1 0 3 0x88 kqread sshd 75717 122838 15622 74 3 0x1100092 bpf pflogd 15622 40008 1 0 3 0x80 netio pflogd 48631 466893 78138 73 3 0x1100090 kqread syslogd 78138 173655 1 0 3 0x100082 netio syslogd 53086 28708 1 0 3 0x100080 kqread resolvd 20740 274631 16529 77 3 0x100092 kqread dhcpleased 23848 388746 16529 77 3 0x100092 kqread dhcpleased 16529 27118 1 0 3 0x80 kqread dhcpleased 49208 218970 0 0 3 0x14200 bored smr 65984 210184 0 0 2 0x14200 zerothread 9131 200590 0 0 3 0x14200 aiodoned aiodoned 7023 434577 0 0 3 0x14200 syncer update 46186 363964 0 0 3 0x14200 cleaner cleaner 45133 201616 0 0 3 0x14200 reaper reaper 40077 82331 0 0 3 0x14200 pgdaemon pagedaemon 52442 336891 0 0 3 0x14200 bored viomb 83676 291711 0 0 3 0x40014200 acpi0 acpi0 19054 19698 0 0 3 0x40014200 idle1 43181 467261 0 0 3 0x14200 bored softnet3 66301 396625 0 0 3 0x14200 bored softnet2 89719 417253 0 0 3 0x14200 bored softnet1 52391 144375 0 0 3 0x14200 bored softnet0 89682 142713 0 0 3 0x14200 bored systqmp 13363 262363 0 0 3 0x14200 bored systq 22612 402473 0 0 3 0x40014200 bored softclock 81394 439454 0 0 3 0x40014200 idle0 1 393109 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 52791 (syz-executor.3) thread 0xffff80002350a300 (22175) exclusive rwlock fdlock r = 0 (0xfffffd806f13f440) #0 witness_lock+0x447 #1 doopenat+0x11f #2 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #2 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #3 Xsyscall+0x128 Process 99286 (syz-executor.7) thread 0xffff80002350b350 (21097) exclusive rwlock futex r = 0 (0xffffffff82b75950) #0 witness_lock+0x447 #1 sys_futex+0x60 sys/kern/sys_futex.c:98 #2 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] #2 syscall+0x606 sys/arch/amd64/amd64/trap.c:623 #3 Xsyscall+0x128 Process 79333 (syz-executor.6) thread 0xffff80002129c030 (226215) exclusive rwlock fdlock r = 0 (0xfffffd8069922058) #0 witness_lock+0x447 #1 doopenat+0x11f #2 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #2 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #3 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10193 6483K 6797K 78643K 11869 0 pcb 13 10K 12K 78643K 116 0 rtable 239 7K 7K 78643K 372 0 pf 32 9K 10K 78643K 52 0 ifaddr 45 15K 15K 78643K 50 0 ifgroup 55 2K 2K 78643K 70 0 counters 60 35K 36K 78643K 66 0 ioctlops 0 0K 4K 78643K 1559 0 iov 0 0K 12K 78643K 29 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1345 84K 84K 78643K 1473 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 7 0 VM map 2 1K 1K 78643K 2 0 sem 10 0K 0K 78643K 10 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 17 61K 89K 78643K 631 0 proc 73 115K 128K 78643K 562 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 6 0 in_multi 99 7K 7K 78643K 117 0 ether_multi 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 547 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 363 86K 86K 78643K 8575 0 UVM aobj 25 2K 2K 78643K 25 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 7 0 NDP 12 0K 1K 78643K 31 0 temp 74 5920K 6043K 78643K 5737 0 kqueue 12 18K 22K 78643K 49 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 45 0 42 1 0 1 1 0 8 0 rtentry 112 114 0 3 4 0 4 4 0 8 0 unpcb 144 183 0 168 3 2 1 3 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 71 0 71 1 1 0 1 0 8 0 tcpcb 808 231 0 227 13 8 5 7 0 8 4 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 368 416 0 408 13 8 5 7 0 8 4 nd6 136 27 0 2 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pffrag 232 18 0 18 1 1 0 1 0 482 0 pffrnode 88 18 0 18 1 1 0 1 0 8 0 pffrent 40 39 0 39 2 2 0 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 41 0 23 1 0 1 1 0 8 0 pfstkey 128 41 0 23 2 0 2 2 0 8 0 pfstate 376 41 0 23 4 0 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 256 469 0 14 29 0 29 29 0 8 0 art_table 32 470 0 14 4 0 4 4 0 8 0 art_node 16 113 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 246 0 224 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 22 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2220 0 764 92 0 92 92 0 8 0 ffsino 272 2220 0 764 98 0 98 98 0 8 0 nchpl 144 3309 0 1610 64 0 64 64 0 8 0 uvmvnodes 80 2491 0 0 51 0 51 51 0 8 0 vnodes 216 2491 0 0 139 0 139 139 0 8 0 namei 1024 11277 0 11277 2 1 1 2 0 8 1 percpumem 16 46 0 3 1 0 1 1 0 8 0 kstatmem 264 30 0 6 2 0 2 2 0 8 0 scxspl 216 10605 0 10605 9 8 1 8 1 8 1 plimitpl 152 50 0 33 1 0 1 1 0 8 0 sigapl 424 973 0 903 10 2 8 8 0 8 0 futexpl 64 4533 0 4529 1 0 1 1 0 8 0 knotepl 120 124 0 0 4 0 4 4 0 8 0 kqueuepl 216 135 0 127 5 4 1 5 0 8 0 pipepl 320 219 0 191 6 3 3 6 0 8 0 fdescpl 496 934 0 904 5 1 4 5 0 8 0 filepl 152 4828 0 4578 21 9 12 15 0 8 2 lockfpl 104 525 0 520 2 1 1 2 0 8 0 lockfspl 48 261 0 256 1 0 1 1 0 8 0 sessionpl 144 24 0 7 1 0 1 1 0 8 0 pgrppl 48 24 0 7 1 0 1 1 0 8 0 ucredpl 104 323 0 311 1 0 1 1 0 8 0 zombiepl 144 1045 0 1044 1 0 1 1 0 8 0 processpl 1072 973 0 903 5 0 5 5 0 8 0 procpl 696 1897 0 1802 10 0 10 10 0 8 1 sosppl 168 6 0 6 1 1 0 1 0 8 0 sockpl 488 646 0 620 20 10 10 12 0 8 6 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 258 0 0 33 0 33 33 0 8 0 mtagpl 96 95 0 0 3 0 3 3 0 8 0 mbufpl 256 358 0 0 20 0 20 20 0 8 0 bufpl 288 4867 0 142 338 0 338 338 0 8 0 anonpl 24 241550 0 228051 109 27 82 105 0 186 0 amapchunkpl 152 27806 0 26812 43 3 40 41 0 158 1 amappl16 200 6601 0 6243 37 17 20 32 0 8 0 amappl15 192 80 0 80 1 1 0 1 0 8 0 amappl14 184 168 0 154 2 1 1 2 0 8 0 amappl13 176 40 0 39 1 0 1 1 0 8 0 amappl12 168 1619 0 1586 3 1 2 2 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 31 0 20 1 0 1 1 0 8 0 amappl9 144 216 0 214 1 0 1 1 0 8 0 amappl8 136 187 0 138 2 0 2 2 0 8 0 amappl7 128 74 0 61 2 0 2 2 0 8 0 amappl6 120 267 0 244 3 2 1 3 0 8 0 amappl5 112 167 0 156 1 0 1 1 0 8 0 amappl4 104 606 0 564 3 1 2 3 0 8 0 amappl3 96 5928 0 5823 4 1 3 3 0 8 0 amappl2 88 1234 0 1163 3 1 2 3 0 8 0 amappl1 80 11822 0 11254 23 10 13 23 0 8 0 amappl 88 8027 0 7770 7 1 6 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 24 0 0 1 0 1 1 0 8 0 uaddrrnd 24 934 0 903 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 934 0 903 1 0 1 1 0 8 0 vmmpekpl 168 13131 0 13075 3 0 3 3 0 8 0 vmmpepl 168 78418 0 76031 127 23 104 124 0 357 0 vmsppl 464 933 0 903 5 1 4 5 0 8 0 rwobjpl 56 29351 0 25349 60 3 57 57 0 8 0 pdppl 4096 1876 0 1806 128 58 70 82 0 8 0 pvpl 32 534801 0 515097 374 211 163 368 0 265 2 pmappl 248 933 0 903 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 778 0 77 21 0 21 21 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82bd4ff0) 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(ffffffff82cf3cd0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cf3cd0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82cf3cd0,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x4c6 sys/kern/sched_bsd.c:470 yield() at yield+0x5b sys/kern/sched_bsd.c:324 pool_get(ffffffff82c5b688,9) at pool_get+0x19d sys/kern/subr_pool.c:589 falloc(ffff80002129c030,ffff80002e40b8d0,ffff80002e40b8dc) at falloc+0x129 fnew sys/kern/kern_descrip.c:1046 [inline] falloc(ffff80002129c030,ffff80002e40b8d0,ffff80002e40b8dc) at falloc+0x129 sys/kern/kern_descrip.c:1020 doopenat(ffff80002129c030,ffffffff,0,0,0,ffff80002e40b9a0) at doopenat+0x12f sys/kern/vfs_syscalls.c:1095 syscall(ffff80002e40ba20) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e40ba20) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9735ad4e690, count: -12 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff800000d87028,9,0) at witness_checkorder+0x13c witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800000d87028,9,0) at witness_checkorder+0x13c sys/kern/subr_witness.c:777 rw_enter_write(ffff800000d87018) at rw_enter_write+0x5c sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000d87000) at unveil_delete_names+0x34 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:92 [inline] unveil_delete_names(ffff800000d87000) at unveil_delete_names+0x34 sys/kern/kern_unveil.c:102 unveil_destroy(ffff80002e454450) at unveil_destroy+0xad sys/kern/kern_unveil.c:183 exit1(ffff800021286850,0,0,3) at exit1+0x3d5 sys/kern/kern_exit.c:220 single_thread_check_locked(ffff800021286850,0,0) at single_thread_check_locked+0x237 sys/kern/kern_sig.c:2015 userret(ffff800021286850) at userret+0x7c single_thread_check sys/kern/kern_sig.c:2054 [inline] userret(ffff800021286850) at userret+0x7c sys/kern/kern_sig.c:1970 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x798b5d36fa10, count: -9