login: kernel: protection fault trap, code=0 Stopped at sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace sys_semop(ffff80002abd1a20,ffff80002ac735f0,ffff80002ac73540) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80002ac735f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ac735f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8bba4a199c0, count: -3 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002ac73510 rbx 0xdeaf4152deaf4152 rdx 0 rcx 0xffff80002abd1a20 rax 0xdeaf4152deaf4152 r8 0x7f7fffffc000 r9 0x1 r10 0xe507679433980db6 r11 0x6017df9f408abecc r12 0 r13 0xfffffd80693df7e0 r14 0xffff80002ac735f0 r15 0 rip 0xffffffff81d7eaa5 sys_semop+0x3d5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002ac73420 ss 0x10 sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{1}> show proc PROC (syz-executor) tid=342276 pid=90653 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002abe22d0,0xffff80002abd02d8 process=0xffff80002afbd838 user=0xffff80002ac6e000, vmspace=0xfffffd806eac6010 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 90653 305246 26768 0 2 0 syz-executor *90653 342276 26768 0 7 0x4000000 syz-executor 90653 232563 26768 0 3 0x4000080 fsleep syz-executor 90653 50775 26768 0 3 0x4000080 fsleep syz-executor 91907 186851 97179 0 7 0 syz-executor 91907 350646 97179 0 2 0x4000000 syz-executor 91907 115844 97179 0 3 0x4000080 fsleep syz-executor 57741 429478 31120 0 3 0x80 nanoslp syz-executor 57741 277252 31120 0 3 0x4000080 lockf syz-executor 57741 441332 31120 0 3 0x4000080 kqsel syz-executor 57741 85968 31120 0 3 0x4000080 kqread syz-executor 57741 459589 31120 0 3 0x4000080 fsleep syz-executor 57741 143927 31120 0 3 0x4000080 fsleep syz-executor 30871 448315 48022 0 3 0x80 nanoslp syz-executor 30871 256206 48022 0 3 0x4000080 lockf syz-executor 30871 290520 48022 0 3 0x4000080 fsleep syz-executor 30871 412711 48022 0 3 0x4000080 fsleep syz-executor 46309 337361 1 0 3 0x100083 ttyopn getty 43780 431438 0 0 3 0x14280 nfsidl nfsio 83517 11800 0 0 3 0x14280 nfsidl nfsio 47459 5961 0 0 3 0x14280 nfsidl nfsio 20028 90784 0 0 3 0x14280 nfsidl nfsio 63083 257115 0 0 3 0x14280 nfsidl nfsio 32396 274815 0 0 3 0x14280 nfsidl nfsio 41688 283153 0 0 3 0x14280 nfsidl nfsio 28122 221686 0 0 3 0x14280 nfsidl nfsio 81716 411119 0 0 3 0x14280 nfsidl nfsio 16100 5820 0 0 3 0x14280 nfsidl nfsio 59764 71629 0 0 3 0x14280 nfsidl nfsio 25097 160548 0 0 3 0x14280 nfsidl nfsio 14589 395964 0 0 3 0x14280 nfsidl nfsio 67063 319724 0 0 3 0x14280 nfsidl nfsio 17784 377127 0 0 3 0x14280 nfsidl nfsio 31575 91022 0 0 3 0x14280 nfsidl nfsio 73417 13934 0 0 3 0x14280 nfsidl nfsio 47686 211679 0 0 3 0x14280 nfsidl nfsio 28838 107074 0 0 3 0x14280 nfsidl nfsio 35635 475298 0 0 3 0x14280 nfsidl nfsio 31120 12604 58762 0 2 0x2 syz-executor 807 416618 58762 0 3 0x82 wait syz-executor 48022 71910 58762 0 2 0x2 syz-executor 26768 483935 58762 0 2 0x3 syz-executor 24682 96896 58762 0 3 0x82 wait syz-executor 97179 215300 58762 0 2 0x3 syz-executor 58323 417413 58762 0 3 0x82 wait syz-executor 61876 352353 58762 0 3 0x2 biowait syz-executor 58762 93406 45219 0 3 0x82 kqread syz-executor 45219 68940 98142 0 3 0x10008a sigsusp ksh 98142 447031 93000 0 3 0x98 kqread sshd-session 93000 183339 48197 0 3 0x92 kqread sshd-session 48197 462196 1 0 3 0x88 kqread sshd 53418 395555 29706 74 3 0x1100092 bpf pflogd 29706 489958 1 0 3 0x80 sbwait pflogd 7692 511070 53220 73 3 0x1100090 kqread syslogd 53220 427137 1 0 3 0x100082 sbwait syslogd 99226 146095 1 0 3 0x100080 kqread resolvd 35853 337838 90377 77 3 0x100092 kqread dhcpleased 87182 158703 90377 77 3 0x100092 kqread dhcpleased 90377 182809 1 0 3 0x80 kqread dhcpleased 51865 416818 0 0 3 0x14200 bored smr 19701 109074 0 0 2 0x14200 zerothread 60659 76746 0 0 3 0x14200 aiodoned aiodoned 1380 456143 0 0 3 0x14200 syncer update 93116 380758 0 0 3 0x14200 cleaner cleaner 56240 326174 0 0 3 0x14200 reaper reaper 35140 67886 0 0 3 0x14200 pgdaemon pagedaemon 47462 373992 0 0 3 0x14200 bored viomb 3426 111566 0 0 3 0x40014200 acpi0 acpi0 85987 380159 0 0 3 0x40014200 idle1 61307 176163 0 0 3 0x14200 bored softnet1 54874 486055 0 0 3 0x14200 bored softnet0 64680 112704 0 0 3 0x14200 bored systqmp 96688 207861 0 0 3 0x14200 bored systq 10820 82158 0 0 3 0x14200 tmoslp softclockmp 15172 352278 0 0 3 0x40014200 tmoslp softclock 99622 173502 0 0 3 0x40014200 idle0 1 17220 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 90653 (syz-executor) thread 0xffff80002abd1a20 (342276) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83903808) #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:175 #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:775 #5 Xsyscall+0x128 Process 91907 (syz-executor) thread 0xffff80002abe34f8 (350646) exclusive rrwlock inode r = 0 (0xfffffd806941b6a8) #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+0xbd 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:775 #10 Xsyscall+0x128 Process 61876 (syz-executor) thread 0xffff8000ffffdc90 (352353) exclusive rrwlock inode r = 0 (0xfffffd8078cd1450) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cebda10) #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+0xbd 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 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11096 12298K 12488K 166960K 15711 0 pcb 17 19K 21K 166960K 522 0 rtable 225 11K 12K 166960K 884 0 pf 34 17K 18K 166960K 240 0 ifaddr 36 6K 8K 166960K 187 0 ifgroup 55 2K 2K 166960K 333 0 sysctl 4 1K 9K 166960K 63 0 counters 70 37K 37K 166960K 478 0 ioctlops 0 0K 4K 166960K 1987 0 iov 0 0K 16K 166960K 211 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1434 90K 91K 166960K 3317 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 37 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 88 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 2360 0 sigio 2 0K 0K 166960K 44 0 proc 73 115K 180K 166960K 880 0 subproc 72 4K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 388 0 in_multi 66 4K 7K 166960K 268 0 ether_multi 1 0K 0K 166960K 36 0 mrt 2 0K 0K 166960K 33 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 199 890K 890K 166960K 199 0 exec 0 0K 1K 166960K 776 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 266 178K 193K 166960K 23553 0 UVM aobj 59 11K 13K 166960K 66 0 pinsyscall 42 84K 103K 166960K 3628 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 184 0 NDP 12 0K 2K 166960K 128 0 temp 86 8680K 8776K 166960K 111737 0 kqueue 13 20K 30K 166960K 446 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 120 369 0 366 5 4 1 3 0 8 0 rtentry 176 239 0 155 6 0 6 6 0 8 0 unpcb 144 1988 0 1968 19 17 2 8 0 8 1 syncache 336 13 0 13 5 5 0 1 0 8 0 tcpqe 32 5 0 5 2 2 0 1 0 8 0 tcpcb 736 719 0 712 20 16 4 13 0 8 3 arp 136 36 0 19 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 328 2899 0 2886 39 34 5 17 0 8 2 nd6 152 46 0 26 1 0 1 1 0 8 0 pkpcb 40 46 0 46 5 5 0 1 0 8 0 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 1 0 1 0 8 0 ppxss 1192 167 0 167 2 1 1 1 0 8 1 pppxif 1504 25 0 25 6 5 1 1 0 8 1 pffrag 232 15 0 7 1 0 1 1 0 482 0 pffrnode 88 13 0 5 1 0 1 1 0 8 0 pffrent 40 27 0 19 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 rttmr 136 6 0 6 5 4 1 1 0 8 1 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1058 0 704 37 11 26 31 0 8 0 art_table 40 1063 0 704 5 0 5 5 0 8 0 art_node 32 237 0 164 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 9 1 0 1 1 0 8 0 semupl 112 3 0 3 3 3 0 1 0 8 0 semapl 112 81 0 72 1 0 1 1 0 8 0 shmpl 112 59 0 5 2 0 2 2 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 5990 0 4482 95 0 95 95 0 8 0 ffsino 296 5991 0 4482 117 0 117 117 0 8 0 nchpl 144 9313 0 7591 65 0 65 65 0 8 0 rtmask 32 14 0 14 6 5 1 1 0 8 1 vnodes 216 3908 0 0 218 0 218 218 0 8 0 namei 1024 31382 0 31381 5 4 1 2 0 8 0 percpumem 16 254 0 204 1 0 1 1 0 8 0 vcpupl 3968 2 0 0 1 0 1 1 0 8 0 vmpool 848 4 0 2 1 0 1 1 0 8 0 kstatmem 264 206 0 178 4 1 3 3 0 8 0 scsiplug 72 16 0 16 6 5 1 1 0 8 1 scxspl 216 53267 0 53266 12 11 1 8 1 8 0 plimitpl 152 506 0 489 1 0 1 1 0 8 0 sigapl 424 2655 0 2588 9 1 8 8 0 8 0 knotepl 120 629 0 0 17 0 17 17 0 8 0 kqueuepl 224 900 0 888 8 4 4 4 0 8 3 pipepl 344 429 0 400 9 6 3 6 0 8 0 fdescpl 528 2614 0 2583 3 0 3 3 0 8 0 filepl 160 18341 0 18105 46 32 14 23 0 8 3 lockfpl 104 979 0 974 3 2 1 2 0 8 0 lockfspl 48 339 0 336 1 0 1 1 0 8 0 sessionpl 144 38 0 29 1 0 1 1 0 8 0 pgrppl 48 99 0 82 1 0 1 1 0 8 0 ucredpl 104 2944 0 2930 1 0 1 1 0 8 0 zombiepl 144 3989 0 3986 1 0 1 1 0 8 0 processpl 1232 2655 0 2588 6 0 6 6 0 8 0 procpl 664 6590 0 6510 8 0 8 8 0 8 0 sosppl 176 13 0 13 6 5 1 1 0 8 1 sockpl 752 5369 0 5333 88 80 8 30 0 8 2 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 5 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 101 0 0 10 1 9 10 0 8 0 mtagpl 96 29 0 0 1 0 1 1 0 8 0 mbufpl 256 1270 0 0 75 0 75 75 0 8 0 bufpl 280 20342 0 14206 439 0 439 439 0 8 0 anonpl 32 13285 0 0 107 0 107 107 0 246 0 amapchunkpl 152 97866 0 97264 53 21 32 39 0 158 6 amappl16 200 8132 0 8039 47 30 17 23 0 8 5 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 21 0 21 1 1 0 1 0 8 0 amappl13 176 492 0 491 1 0 1 1 0 8 0 amappl12 168 3036 0 2994 3 0 3 3 0 8 0 amappl11 160 11 0 11 1 1 0 1 0 8 0 amappl10 152 48 0 33 1 0 1 1 0 8 0 amappl9 144 253 0 252 2 1 1 1 0 8 0 amappl8 136 32 0 29 1 0 1 1 0 8 0 amappl7 128 99 0 97 1 0 1 1 0 8 0 amappl6 120 398 0 384 1 0 1 1 0 8 0 amappl5 112 98 0 85 1 0 1 1 0 8 0 amappl4 104 559 0 530 1 0 1 1 0 8 0 amappl3 96 14247 0 14148 4 1 3 3 0 8 0 amappl2 88 2785 0 2708 2 0 2 2 0 8 0 amappl1 80 20964 0 20377 14 0 14 14 0 8 0 amappl 88 22345 0 22161 5 0 5 5 0 92 0 uvmvnodes 80 175 0 1 4 0 4 4 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 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 128 257 0 257 5 4 1 1 0 8 1 dma64 64 9 0 9 4 4 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 65 0 7 2 0 2 2 0 8 0 uaddrrnd 24 2614 0 2583 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2614 0 2583 1 0 1 1 0 8 0 vmmpekpl 168 23367 0 23315 3 0 3 3 0 8 0 vmmpepl 168 172828 0 170801 128 26 102 108 0 357 1 vmsppl 488 2613 0 2583 6 1 5 5 0 8 1 rwobjpl 80 46622 0 45372 35 3 32 33 0 8 0 pdppl 4096 5243 0 5172 123 50 73 83 0 8 2 pvpl 32 24492 0 0 198 1 197 197 0 265 0 pmappl 256 2617 0 2585 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 408 0 93 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff83824ff0) 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 __mp_lock(ffffffff83903600) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83903600) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002ac43ed0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x76bbbe449b60, count: -6 ddb{0}> machine ddbcpu 1 Stopped at sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{1}> trace sys_semop(ffff80002abd1a20,ffff80002ac735f0,ffff80002ac73540) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80002ac735f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ac735f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8bba4a199c0, count: -3