kernel: protection fault trap, code=0 Stopped at sys_semop+0x3d5: movzwl 0(%rax),%r15d 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(ffff80003a41ed20,ffff80003a433a30,ffff80003a433980) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80003a433a30) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a433a30) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x93e015a2030, count: -3 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003a433950 rbx 0xdead4110dead4110 rdx 0 rcx 0xffff80003a41ed20 rax 0xdead4110dead4110 r8 0x7f7fffffc000 r9 0 r10 0x87c3623d6ef82b7c r11 0x4ae5e2754fad019e r12 0 r13 0xfffffd806b356a80 r14 0xffff80003a433a30 r15 0 rip 0xffffffff832a67f5 sys_semop+0x3d5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003a433860 ss 0x10 sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{0}> show proc PROC (syz-executor) tid=240910 pid=42991 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=81, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a41e2c0,0xffff80003a41e038 process=0xffff80003a426720 user=0xffff80003a42e000, vmspace=0xfffffd805e6c5d80 estcpu=31, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 395 21450 3486 0 7 0 syz-executor 395 239599 3486 0 2 0x4000000 syz-executor 395 465283 3486 0 3 0x4000080 fsleep syz-executor 42991 388542 89070 0 2 0 syz-executor *42991 240910 89070 0 7 0x4000000 syz-executor 42991 372272 89070 0 3 0x4000080 fsleep syz-executor 56836 51637 33621 0 2 0 syz-executor 56836 136085 33621 0 2 0x4000000 syz-executor 56836 1377 33621 0 3 0x4000080 fsleep syz-executor 12357 298622 34659 60928 2 0x10 syz-executor 12357 384493 34659 60928 2 0x4000010 syz-executor 12357 192867 34659 60928 2 0x4000010 syz-executor 12357 425827 34659 60928 2 0x4000010 syz-executor 51694 3159 38552 0 2 0 syz-executor 51694 476890 38552 0 3 0x4000000 inode syz-executor 51694 442482 38552 0 2 0x4000000 syz-executor 66010 409793 1 0 3 0x82 nanoslp getty 35584 415345 54577 60928 2 0x10 syz-executor 35584 79239 54577 60928 3 0x4000090 ttyout syz-executor 35584 164298 54577 60928 2 0x4000010 syz-executor 35584 27670 54577 60928 3 0x4000090 fsleep syz-executor 68489 331104 0 0 3 0x14200 acct acct 85506 125626 0 0 3 0x14200 bored sosplice 89070 431173 31017 0 3 0x82 nanoslp syz-executor 34659 12936 31017 0 2 0x3 syz-executor 54577 382830 31017 0 2 0x3 syz-executor 38552 493533 31017 0 2 0x3 syz-executor 33621 353070 31017 0 3 0x82 nanoslp syz-executor 70807 368129 31017 0 2 0x2 syz-executor 3486 11590 31017 0 2 0x3 syz-executor 22641 350541 31017 0 3 0x82 nanoslp syz-executor 31017 177660 22976 0 3 0x82 kqread syz-executor 22976 30886 43399 0 3 0x10008a sigsusp ksh 43399 80316 87481 0 3 0x98 kqread sshd-session 87481 135027 76566 0 3 0x92 kqread sshd-session 76566 364864 1 0 3 0x88 kqread sshd 26360 122032 3393 74 3 0x1100092 bpf pflogd 3393 7618 1 0 3 0x80 sbwait pflogd 2385 226589 21117 73 3 0x1100090 kqread syslogd 21117 506436 1 0 3 0x100082 sbwait syslogd 58749 353495 1 0 3 0x100080 kqread resolvd 39775 39570 40667 77 3 0x100092 kqread dhcpleased 54182 492098 40667 77 3 0x100092 kqread dhcpleased 40667 423113 1 0 3 0x80 kqread dhcpleased 17650 463798 0 0 3 0x14200 bored smr 86808 282954 0 0 2 0x14200 zerothread 62163 435214 0 0 3 0x14200 aiodoned aiodoned 78671 321300 0 0 3 0x14200 syncer update 73205 101224 0 0 3 0x14200 cleaner cleaner 55158 210146 0 0 3 0x14200 reaper reaper 79803 27022 0 0 3 0x14200 pgdaemon pagedaemon 7824 127363 0 0 3 0x14200 bored viomb 49943 228049 0 0 3 0x40014200 acpi0 acpi0 70678 257871 0 0 3 0x40014200 idle1 40127 326118 0 0 3 0x14200 bored softnet7 63939 372199 0 0 3 0x14200 bored softnet6 76539 254556 0 0 3 0x14200 bored softnet5 15301 368663 0 0 3 0x14200 bored softnet4 42992 140485 0 0 3 0x14200 bored softnet3 31078 432533 0 0 3 0x14200 bored softnet2 92772 239151 0 0 3 0x14200 bored softnet1 98365 387222 0 0 3 0x14200 bored softnet0 26217 275310 0 0 3 0x14200 bored systqmp 91724 9567 0 0 3 0x14200 bored systq 84561 348223 0 0 3 0x14200 tmoslp softclockmp 92123 168321 0 0 3 0x40014200 tmoslp softclock 32396 121522 0 0 3 0x40014200 idle0 1 170180 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 42991 (syz-executor) thread 0xffff80003a41ed20 (240910) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8395efd8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 malloc+0xe3 sys/kern/kern_malloc.c:174 #3 sys_semop+0x22f sys/kern/sysv_sem.c:-1 #4 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #5 Xsyscall+0x128 Process 12357 (syz-executor) thread 0xffff80003a41c038 (425827) exclusive rrwlock inode r = 0 (0xfffffd806e3cf118) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806a6aba20) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 51694 (syz-executor) thread 0xffff80003a41e7f0 (442482) exclusive rrwlock inode r = 0 (0xfffffd806a6abec0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 vn_open+0x1f1 sys/kern/vfs_vnops.c:107 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #10 Xsyscall+0x128 Process 35584 (syz-executor) thread 0xffff80003a41d260 (164298) exclusive rwlock vmmaplk r = 0 (0xfffffd805e6c5c98) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 sys_munmap+0x1ca sys/uvm/uvm_mmap.c:531 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #5 Xsyscall+0x128 Process 70807 (syz-executor) thread 0xffff80002a2b9770 (368129) exclusive rrwlock inode r = 0 (0xfffffd806a6ab7d0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_getdents+0x254 sys/kern/vfs_syscalls.c:3168 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10221 11072K 11903K 166960K 12396 0 pcb 18 14K 23K 166960K 283 0 rtable 210 8K 9K 166960K 333 0 pf 36 18K 67486K 166960K 114 0 ifaddr 44 8K 8K 166960K 78 0 ifgroup 55 2K 2K 166960K 113 0 sysctl 2 1K 9K 166960K 11 0 counters 68 36K 38K 166960K 152 0 ioctlops 0 0K 4K 166960K 1711 0 iov 0 0K 32K 166960K 81 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1463 92K 92K 166960K 2155 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 18 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 758 0 sigio 1 0K 0K 166960K 16 0 proc 72 115K 164K 166960K 600 0 subproc 72 4K 4K 166960K 73 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 70 0 in_multi 102 7K 7K 166960K 132 0 ether_multi 1 0K 0K 166960K 11 0 mrt 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 479 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 255 160K 179K 166960K 8855 0 UVM aobj 14 2K 2K 166960K 15 0 pinsyscall 42 84K 100K 166960K 1877 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 57 0 NDP 12 0K 1K 166960K 53 0 temp 76 8652K 8894K 166960K 42331 0 kqueue 13 20K 31K 166960K 156 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 120 176 0 171 4 3 1 3 0 8 0 rtentry 176 109 0 20 5 0 5 5 0 8 0 unpcb 144 614 0 596 7 1 6 6 0 8 5 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 216 0 208 7 6 1 7 0 8 0 arp 128 12 0 1 1 0 1 1 0 8 0 inpcb 328 1073 0 1057 13 6 7 7 0 8 5 nd6 144 20 0 1 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 39 0 39 3 2 1 1 0 8 1 pppxif 1504 1 0 1 1 1 0 1 0 8 0 pfstscr 40 132 0 132 1 1 0 1 0 8 0 pffrag 232 7 0 3 1 0 1 1 0 482 0 pffrnode 88 7 0 3 1 0 1 1 0 8 0 pffrent 40 11 0 7 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 59 0 1 1 0 1 1 0 8 0 pfstkey 128 126 0 68 2 0 2 2 0 8 0 pfstate 384 126 0 68 6 0 6 6 0 8 0 pfrule 1344 24 0 19 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 515 0 75 30 1 29 29 0 8 1 art_table 40 517 0 75 5 0 5 5 0 8 0 art_node 32 109 0 30 1 0 1 1 0 8 0 sysvmsgpl 40 70 0 68 1 0 1 1 0 8 0 semapl 112 13 0 5 1 0 1 1 0 8 0 shmpl 112 12 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2920 0 1406 95 0 95 95 0 8 0 ffsino 296 2920 0 1406 117 0 117 117 0 8 0 nchpl 144 3980 0 2281 65 1 64 64 0 8 0 rtmask 32 14 0 14 3 2 1 1 0 8 1 uvmvnodes 80 3380 0 0 69 0 69 69 0 8 0 vnodes 216 3380 0 0 188 0 188 188 0 8 0 namei 1024 13278 0 13274 3 2 1 2 0 8 0 percpumem 16 91 0 42 1 0 1 1 0 8 0 kstatmem 264 76 0 50 4 1 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 4 0 4 2 2 0 1 0 8 0 scxspl 216 15676 0 15676 11 10 1 8 1 8 1 plimitpl 152 168 0 150 1 0 1 1 0 8 0 sigapl 424 1065 0 1010 7 0 7 7 0 8 0 knotepl 120 522 0 0 16 0 16 16 0 8 0 kqueuepl 224 304 0 294 5 0 5 5 0 8 4 pipepl 344 169 0 142 3 0 3 3 0 8 0 fdescpl 528 1040 0 1009 3 0 3 3 0 8 0 filepl 160 6788 0 6554 25 7 18 18 0 8 7 lockfpl 104 318 0 316 1 0 1 1 0 8 0 lockfspl 48 125 0 123 1 0 1 1 0 8 0 sessionpl 144 24 0 16 1 0 1 1 0 8 0 pgrppl 48 36 0 20 1 0 1 1 0 8 0 ucredpl 104 1312 0 1297 1 0 1 1 0 8 0 zombiepl 144 1269 0 1268 1 0 1 1 0 8 0 processpl 1248 1065 0 1010 5 0 5 5 0 8 0 procpl 664 2184 0 2115 8 1 7 7 0 8 0 sosppl 168 5 0 5 2 2 0 1 0 8 0 sockpl 752 1912 0 1873 27 15 12 17 0 8 7 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k 2048 53 0 0 7 0 7 7 0 8 0 mtagpl 96 51 0 0 2 0 2 2 0 8 0 mbufpl 256 227 0 0 15 0 15 15 0 8 0 bufpl 280 6893 0 750 440 0 440 440 0 8 0 anonpl 32 11705 0 0 96 1 95 95 0 246 0 amapchunkpl 152 28897 0 28308 47 17 30 35 0 158 5 amappl16 200 3331 0 3244 28 10 18 18 0 8 8 amappl15 192 75 0 75 1 1 0 1 0 8 0 amappl14 184 119 0 107 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 1703 0 1672 4 2 2 3 0 8 0 amappl11 160 52 0 37 1 0 1 1 0 8 0 amappl10 152 14 0 14 1 1 0 1 0 8 0 amappl9 144 268 0 268 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 115 0 103 1 0 1 1 0 8 0 amappl6 120 183 0 180 1 0 1 1 0 8 0 amappl5 112 124 0 115 1 0 1 1 0 8 0 amappl4 104 321 0 301 1 0 1 1 0 8 0 amappl3 96 5484 0 5368 4 0 4 4 0 8 0 amappl2 88 669 0 606 2 0 2 2 0 8 0 amappl1 80 11357 0 10754 15 0 15 15 0 8 0 amappl 88 8037 0 7854 5 0 5 5 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 128 254 0 254 2 2 0 1 0 8 0 dma64 64 7 0 7 2 2 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 14 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1040 0 1009 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1040 0 1009 1 0 1 1 0 8 0 vmmpekpl 168 9826 0 9788 3 0 3 3 0 8 0 vmmpepl 168 71407 0 69334 110 7 103 104 0 357 5 vmsppl 488 1039 0 1009 6 1 5 5 0 8 1 rwobjpl 80 24425 0 20025 94 0 94 94 0 8 0 pdppl 4096 2088 0 2018 104 32 72 82 0 8 2 pvpl 32 18841 0 0 152 0 152 152 0 265 0 pmappl 256 1039 0 1009 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 291 0 44 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff80003a41ed20,ffff80003a433a30,ffff80003a433980) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80003a433a30) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a433a30) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x93e015a2030, count: -3 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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 end of kernel end trace frame: 0x73aab45f02d0, count: -3