kernel: protection fault trap, code=0 Stopped at sys_semop+0x3f9: movzwl 0(%r15),%r12d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace sys_semop(ffff80002a34f9e0,ffff800033405b90,ffff800033405ae0) at sys_semop+0x3f9 sys/kern/sysv_sem.c:602 syscall(ffff800033405b90) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033405b90) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfa3914e5200, count: -3 ddb{0}> show registers rdi 0 rsi 0xfff9 __ALIGN_SIZE+0xeff9 rbp 0xffff800033405ab0 rbx 0xffff800010fcc804 rdx 0 rcx 0xffff80002a34f9e0 rax 0xffffffff837feff0 cpu_info_full_primary+0x1ff0 r8 0x7f7fffffc000 r9 0 r10 0x4a79c1c2d0eef20b r11 0x21aa8d1538e43636 r12 0xffff800010fcc804 r13 0xfffffff9 r14 0xbeef __ALIGN_SIZE+0xaeef r15 0xdeadbeefdeadbeef rip 0xffffffff8228aa29 sys_semop+0x3f9 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff800033405990 ss 0x10 sys_semop+0x3f9: movzwl 0(%r15),%r12d ddb{0}> show proc PROC (syz-executor) tid=27117 pid=10342 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=84, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a34e040,0xffff80002a34f4d0 process=0xffff80002a2b1398 user=0xffff800033400000, vmspace=0xfffffd806b9a53e8 estcpu=34, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18769 35527 17456 0 2 0 syz-executor 18769 230671 17456 0 2 0x4000000 syz-executor 10342 129641 99909 0 2 0 syz-executor *10342 27117 99909 0 7 0x4000000 syz-executor 10342 2074 99909 0 3 0x4000080 fsleep syz-executor 9608 79384 12071 0 2 0 syz-executor 20413 358530 83321 0 2 0x1006 arp 46094 151133 55424 0 2 0 syz-executor 46094 427944 55424 0 2 0x4000000 syz-executor 46094 70885 55424 0 3 0x4000080 fsleep syz-executor 83321 512577 63532 0 3 0x10008a sigsusp sh 63532 389518 18758 0 3 0x82 wait syz-executor 55424 286813 18758 0 2 0x3 syz-executor 32840 187665 18758 0 2 0x2 syz-executor 76122 437490 18758 0 2 0x2 syz-executor 45770 442059 18758 0 3 0x82 wait syz-executor 56800 162360 0 0 3 0x14200 bored sosplice 12071 518397 18758 0 2 0x3 syz-executor 99909 157113 18758 0 2 0x3 syz-executor 17456 138535 18758 0 2 0x3 syz-executor 18758 233086 87882 0 3 0x82 kqread syz-executor 87882 252474 39626 0 3 0x10008a sigsusp ksh 39626 323317 6833 0 3 0x98 kqread sshd-session 6833 70353 38126 0 3 0x92 kqread sshd-session 51829 282800 1 0 3 0x100083 ttyin getty 38126 452590 1 0 3 0x88 kqread sshd 92563 157788 8778 74 3 0x1100092 bpf pflogd 8778 519431 1 0 3 0x80 sbwait pflogd 72187 315392 55374 73 3 0x1100090 kqread syslogd 55374 252676 1 0 3 0x100082 sbwait syslogd 77399 166087 1 0 3 0x100080 kqread resolvd 92081 287233 91638 77 3 0x100092 kqread dhcpleased 74031 359061 91638 77 3 0x100092 kqread dhcpleased 91638 192779 1 0 3 0x80 kqread dhcpleased 72391 347990 0 0 3 0x14200 bored smr 83947 409764 0 0 2 0x14200 zerothread 55800 394023 0 0 3 0x14200 aiodoned aiodoned 95612 155804 0 0 3 0x14200 syncer update 51251 435606 0 0 3 0x14200 cleaner cleaner 20478 101020 0 0 3 0x14200 reaper reaper 38695 362942 0 0 3 0x14200 pgdaemon pagedaemon 34596 149625 0 0 3 0x14200 bored viomb 53026 46721 0 0 3 0x40014200 acpi0 acpi0 58536 388456 0 0 7 0x40014200 idle1 47956 165983 0 0 3 0x14200 bored softnet7 64935 178344 0 0 3 0x14200 bored softnet6 46055 163263 0 0 3 0x14200 bored softnet5 53390 174773 0 0 3 0x14200 bored softnet4 40517 362464 0 0 3 0x14200 bored softnet3 48584 253877 0 0 3 0x14200 bored softnet2 4288 66212 0 0 3 0x14200 bored softnet1 51151 47946 0 0 3 0x14200 bored softnet0 8211 146868 0 0 3 0x14200 bored systqmp 26078 378917 0 0 3 0x14200 bored systq 68993 374132 0 0 3 0x14200 tmoslp softclockmp 3169 42249 0 0 3 0x40014200 tmoslp softclock 97803 505577 0 0 3 0x40014200 idle0 1 315200 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 10342 (syz-executor) thread 0xffff80002a34f9e0 (27117) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83927578) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 malloc+0xe5 sys/kern/kern_malloc.c:174 #3 sys_semop+0x234 sys/kern/sysv_sem.c:564 #4 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #5 Xsyscall+0x128 Process 46094 (syz-executor) thread 0xffff80002a34e2d0 (427944) exclusive rrwlock inode r = 0 (0xfffffd806e1b7358) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domknodat+0xb4 sys/kern/vfs_syscalls.c:1588 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 32840 (syz-executor) thread 0xffff80003ac254b8 (187665) exclusive rwlock vmmaplk r = 0 (0xfffffd806b9a5c88) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3738 #4 process_new+0x572 sys/kern/kern_fork.c:284 #5 fork1+0x3ea sys/kern/kern_fork.c:410 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd8061dcbe80) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3729 #4 process_new+0x572 sys/kern/kern_fork.c:284 #5 fork1+0x3ea sys/kern/kern_fork.c:410 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10215 11104K 12488K 166960K 13472 0 pcb 17 17K 23K 166960K 646 0 rtable 170 11K 12K 166960K 804 0 pf 35 17K 82K 166960K 422 0 ifaddr 30 5K 8K 166960K 227 0 ifgroup 51 2K 2K 166960K 402 0 sysctl 4 1K 9K 166960K 91 0 counters 66 36K 38K 166960K 556 0 ioctlops 0 0K 8K 166960K 2328 0 iov 0 0K 32K 166960K 235 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1457 92K 93K 166960K 3555 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 14K 18K 166960K 37 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 266 0 dirhash 12 2K 2K 166960K 66 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 3226 0 sigio 0 0K 0K 166960K 63 0 proc 72 115K 164K 166960K 1144 0 subproc 72 4K 4K 166960K 164 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 569 0 in_multi 52 3K 7K 166960K 321 0 ether_multi 1 0K 0K 166960K 22 0 mrt 1 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 1 0K 1K 166960K 881 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 233 162K 193K 166960K 30408 0 UVM aobj 98 6K 6K 166960K 105 0 pinsyscall 43 86K 102K 166960K 4561 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 184 0 NDP 11 0K 2K 166960K 155 0 temp 81 8684K 8940K 166960K 155994 0 kqueue 13 20K 30K 166960K 607 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 362 0 359 4 3 1 3 0 8 0 rtentry 176 264 0 207 5 0 5 5 0 8 0 unpcb 144 2516 0 2499 30 27 3 10 0 8 2 syncache 336 9 0 9 5 5 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 1204 0 1196 22 20 2 7 0 8 1 arp 128 29 0 21 1 0 1 1 0 8 0 inpcb 328 3765 0 3754 38 32 6 13 0 8 4 nd6 144 44 0 32 1 0 1 1 0 8 0 pkpcb 40 23 0 23 8 8 0 1 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 ppxss 1192 195 0 195 5 4 1 1 0 8 1 pppxif 1504 88 0 88 7 6 1 1 0 8 1 pfstscr 40 4 0 4 2 2 0 1 0 8 0 pffrag 232 20 0 14 1 0 1 1 0 482 0 pffrnode 88 17 0 12 1 0 1 1 0 8 0 pffrent 40 31 0 25 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 pfrktable 1344 5 0 5 2 2 0 1 0 8 0 pfanchor 1288 4 0 1 2 1 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 231 0 149 1 0 1 1 0 8 0 pfstkey 128 237 0 155 4 0 4 4 0 8 0 pfstate 384 235 0 153 10 0 10 10 0 8 0 pfrule 1344 103 0 97 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 6 0 2 6 2 4 5 0 8 0 art_heap4 256 1358 0 1105 34 15 19 29 0 8 0 art_table 40 1364 0 1107 5 0 5 5 0 8 0 art_node 32 263 0 215 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 8 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 256 0 247 1 0 1 1 0 8 0 shmpl 112 102 0 7 3 0 3 3 0 8 0 dirhash 1024 53 0 36 3 0 3 3 0 8 0 dino2pl 256 7430 0 5900 97 0 97 97 0 8 0 ffsino 296 7430 0 5900 119 0 119 119 0 8 0 nchpl 144 11857 0 10146 64 0 64 64 0 8 0 rtmask 32 23 0 23 9 9 0 1 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 42575 0 42572 7 6 1 2 0 8 0 percpumem 16 293 0 245 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 246 0 220 8 6 2 3 0 8 0 scsiplug 72 16 0 16 7 6 1 1 0 8 1 scxspl 216 93837 0 93837 15 13 2 8 1 8 2 plimitpl 152 676 0 658 1 0 1 1 0 8 0 sigapl 424 3526 0 3471 9 2 7 9 0 8 0 knotepl 120 639 0 0 18 0 18 18 0 8 0 kqueuepl 224 1297 0 1288 15 14 1 5 0 8 0 pipepl 344 702 0 675 18 12 6 9 0 8 3 fdescpl 528 3478 0 3446 3 0 3 3 0 8 0 filepl 160 24335 0 24123 49 33 16 21 0 8 4 lockfpl 104 1751 0 1749 5 4 1 2 0 8 0 lockfspl 48 561 0 559 1 0 1 1 0 8 0 sessionpl 144 34 0 25 1 0 1 1 0 8 0 pgrppl 48 82 0 65 1 0 1 1 0 8 0 ucredpl 104 3693 0 3680 1 0 1 1 0 8 0 zombiepl 144 4831 0 4830 1 0 1 1 0 8 0 processpl 1248 3526 0 3471 6 0 6 6 0 8 0 procpl 656 8667 0 8607 9 2 7 8 0 8 0 sosppl 168 18 0 18 8 7 1 1 0 8 1 sockpl 752 6780 0 6749 84 74 10 29 0 8 5 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 61 0 0 7 0 7 7 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 1197 0 0 71 0 71 71 0 8 0 bufpl 280 38567 0 32425 440 0 440 440 0 8 0 anonpl 32 15240 0 0 122 0 122 122 0 246 0 amapchunkpl 152 108429 0 107910 76 47 29 35 0 158 1 amappl16 200 13000 0 12729 96 63 33 33 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 136 0 124 1 0 1 1 0 8 0 amappl13 176 3 0 3 2 2 0 1 0 8 0 amappl12 168 4282 0 4251 3 1 2 2 0 8 0 amappl11 160 52 0 37 1 0 1 1 0 8 0 amappl10 152 8 0 8 2 2 0 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 23 0 19 1 0 1 1 0 8 0 amappl7 128 124 0 111 1 0 1 1 0 8 0 amappl6 120 278 0 273 1 0 1 1 0 8 0 amappl5 112 174 0 164 1 0 1 1 0 8 0 amappl4 104 324 0 303 1 0 1 1 0 8 0 amappl3 96 21969 0 21864 5 1 4 4 0 8 0 amappl2 88 829 0 762 2 0 2 2 0 8 0 amappl1 80 22041 0 21448 18 2 16 16 0 8 0 amappl 88 29017 0 28860 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma16384 16384 3 0 3 2 2 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 9 0 9 4 4 0 1 0 8 0 dma128 128 258 0 258 4 4 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 104 0 7 2 0 2 2 0 8 0 uaddrrnd 24 3478 0 3446 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3478 0 3446 1 0 1 1 0 8 0 vmmpekpl 168 28703 0 28650 4 0 4 4 0 8 0 vmmpepl 168 223667 0 221483 164 46 118 118 0 357 0 vmsppl 488 3477 0 3446 6 1 5 5 0 8 0 rwobjpl 80 63432 0 56223 158 2 156 156 0 8 0 pdppl 4096 6964 0 6892 120 46 74 84 0 8 2 pvpl 32 25661 0 0 206 1 205 205 0 265 0 pmappl 256 3477 0 3446 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 403 0 104 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff80002a34f9e0,ffff800033405b90,ffff800033405ae0) at sys_semop+0x3f9 sys/kern/sysv_sem.c:602 syscall(ffff800033405b90) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033405b90) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfa3914e5200, count: -3 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299ddff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu_x86.c:1218 sched_idle(ffff8000299ddff0) at sched_idle+0x4d8 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5