kernel: protection fault trap, code=0 Stopped at sys_semop+0x45b: 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(ffff800034ff94a0,ffff800036ffff40,ffff800036fffe90) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff800036ffff40) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036ffff40) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xac30fc3ed10, count: -3 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800036fffe60 rbx 0 rdx 0 rcx 0xffff800034ff94a0 rax 0xdeafbeaddeafbead r8 0x7f7fffffc000 r9 0x1 r10 0x7847d643b00b06aa r11 0xa0a8c4c1f02469da r12 0xffff80000151f804 r13 0 r14 0xffff800036ffff40 r15 0 rip 0xffffffff818e173b sys_semop+0x45b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800036fffd40 ss 0x10 sys_semop+0x45b: movzwl 0(%rax),%r15d ddb{1}> show proc PROC (syz-executor) tid=494242 pid=65889 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=82, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800034ff99c0,0xffff800034ff9740 process=0xffff800038414020 user=0xffff800036ffa000, vmspace=0xfffffd806ba0a9a0 estcpu=32, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 8276 402645 44798 0 2 0 syz-executor 8276 395500 44798 0 2 0x4000000 syz-executor 86000 348292 24957 0 2 0 syz-executor 86000 300693 24957 0 2 0x4000000 syz-executor 65889 25636 51958 0 7 0 syz-executor *65889 494242 51958 0 7 0x4000000 syz-executor 65889 128851 51958 0 2 0x4000080 syz-executor 19402 386694 31538 0 2 0 syz-executor 19402 226693 31538 0 3 0x4000000 biowait syz-executor 19402 272442 31538 0 3 0x4000080 fsleep syz-executor 33994 432925 93249 0 2 0x1 syz-executor 33994 174040 93249 0 3 0x4000080 kqsel syz-executor 33994 394089 93249 0 3 0x4000080 fsleep syz-executor 33994 309654 93249 0 3 0x4000080 fsleep syz-executor 44798 37427 63416 0 3 0x82 nanoslp syz-executor 13879 366192 0 0 3 0x14200 acct acct 45909 129419 63416 0 3 0x82 nanoslp syz-executor 9431 459574 0 0 3 0x14200 bored sosplice 37277 483425 0 0 3 0x14280 nfsidl nfsio 51006 61006 0 0 3 0x14280 nfsidl nfsio 76513 408225 0 0 3 0x14280 nfsidl nfsio 53955 63241 0 0 3 0x14280 nfsidl nfsio 94845 384655 0 0 3 0x14280 nfsidl nfsio 6927 73015 0 0 3 0x14280 nfsidl nfsio 1614 459198 0 0 3 0x14280 nfsidl nfsio 66326 125682 0 0 3 0x14280 nfsidl nfsio 37526 116329 0 0 3 0x14280 nfsidl nfsio 51845 470651 0 0 3 0x14280 nfsidl nfsio 87698 157992 0 0 3 0x14280 nfsidl nfsio 87860 297374 0 0 3 0x14280 nfsidl nfsio 89963 447655 0 0 3 0x14280 nfsidl nfsio 78519 247641 0 0 3 0x14280 nfsidl nfsio 91395 132770 0 0 3 0x14280 nfsidl nfsio 6237 417457 0 0 3 0x14280 nfsidl nfsio 88012 325187 0 0 3 0x14280 nfsidl nfsio 97545 372439 0 0 3 0x14280 nfsidl nfsio 2499 25801 0 0 3 0x14280 nfsidl nfsio 8161 291608 0 0 3 0x14280 nfsidl nfsio 60838 87815 63416 0 3 0x82 wait syz-executor 50925 147124 63416 0 2 0x3 syz-executor 31538 371194 63416 0 3 0x82 nanoslp syz-executor 51958 106930 63416 0 3 0x82 nanoslp syz-executor 24957 453249 63416 0 3 0x82 nanoslp syz-executor 93249 65330 63416 0 3 0x82 nanoslp syz-executor 63416 344132 3772 0 3 0x82 kqread syz-executor 3772 383284 10627 0 3 0x10008a sigsusp ksh 10627 322231 2627 0 3 0x98 kqread sshd-session 2627 453760 613 0 3 0x92 kqread sshd-session 61816 283205 1 0 3 0x100083 ttyin getty 613 131141 1 0 3 0x88 kqread sshd 74420 130736 46752 74 3 0x1100092 bpf pflogd 46752 253574 1 0 3 0x80 sbwait pflogd 6533 392082 3196 73 3 0x1100090 kqread syslogd 3196 477637 1 0 3 0x100082 sbwait syslogd 57695 174026 1 0 3 0x100080 kqread resolvd 21206 80208 19101 77 3 0x100092 kqread dhcpleased 23889 25784 19101 77 3 0x100092 kqread dhcpleased 19101 162587 1 0 3 0x80 kqread dhcpleased 11994 72836 0 0 3 0x14200 bored smr 68102 407338 0 0 2 0x14200 zerothread 70079 448150 0 0 3 0x14200 aiodoned aiodoned 50527 155618 0 0 3 0x14200 syncer update 98857 245522 0 0 3 0x14200 cleaner cleaner 6804 437417 0 0 3 0x14200 reaper reaper 69890 438782 0 0 3 0x14200 pgdaemon pagedaemon 84743 163349 0 0 3 0x14200 bored viomb 77572 163760 0 0 3 0x40014200 acpi0 acpi0 77587 255070 0 0 3 0x40014200 idle1 91281 358491 0 0 3 0x14200 bored softnet7 51748 500565 0 0 3 0x14200 bored softnet6 69639 492070 0 0 3 0x14200 bored softnet5 36217 398193 0 0 3 0x14200 bored softnet4 42520 249359 0 0 3 0x14200 bored softnet3 62083 249341 0 0 3 0x14200 bored softnet2 41797 245213 0 0 3 0x14200 bored softnet1 84737 291385 0 0 3 0x14200 bored softnet0 88434 193408 0 0 3 0x14200 bored systqmp 93496 349714 0 0 3 0x14200 bored systq 1999 102808 0 0 3 0x14200 tmoslp softclockmp 70969 118995 0 0 3 0x40014200 tmoslp softclock 15004 291157 0 0 3 0x40014200 idle0 1 453257 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 8276 (syz-executor) thread 0xffff800034ff8020 (395500) exclusive rrwlock inode r = 0 (0xfffffd807e457c30) #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 vn_open+0x13f sys/kern/vfs_vnops.c:140 #8 sys_acct+0xb9 sys/kern/kern_acct.c:121 #9 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #10 Xsyscall+0x128 Process 65889 (syz-executor) thread 0xffff800034ff94a0 (494242) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a26670) #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 19402 (syz-executor) thread 0xffff80003bc1d228 (226693) exclusive rrwlock inode r = 0 (0xfffffd806f51fc58) #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 vget+0x2bd sys/kern/vfs_subr.c:693 #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+0x1a72 sys/ufs/ufs/ufs_lookup.c:520 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dorenameat+0x145 sys/kern/vfs_syscalls.c:3000 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8071a6fa18) #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 dorenameat+0x145 sys/kern/vfs_syscalls.c:3000 #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10222 11252K 11350K 166960K 12301 0 pcb 18 15K 16K 166960K 239 0 rtable 208 9K 9K 166960K 403 0 pf 37 18K 21K 166960K 120 0 ifaddr 44 8K 8K 166960K 87 0 ifgroup 55 2K 2K 166960K 123 0 sysctl 4 1K 9K 166960K 10 0 counters 68 36K 37K 166960K 158 0 ioctlops 0 0K 4K 166960K 1583 0 iov 0 0K 16K 166960K 35 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1442 91K 91K 166960K 2083 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 19 6K 6K 166960K 99 0 dirhash 15 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 705 0 sigio 0 0K 0K 166960K 8 0 proc 72 115K 164K 166960K 664 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 83 0 in_multi 99 7K 7K 166960K 152 0 ether_multi 1 0K 0K 166960K 9 0 mrt 2 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 476 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 246 160K 177K 166960K 8242 0 UVM aobj 57 6K 6K 166960K 58 0 pinsyscall 42 84K 104K 166960K 1900 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 28 0 NDP 14 0K 2K 166960K 56 0 temp 50 8677K 8746K 166960K 37308 0 kqueue 13 20K 35K 166960K 154 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 81 0 75 1 0 1 1 0 8 0 rtentry 176 140 0 54 5 0 5 5 0 8 0 unpcb 144 320 0 302 1 0 1 1 0 8 0 syncache 336 10 0 10 2 1 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 736 371 0 364 7 6 1 7 0 8 0 arp 128 14 0 4 1 0 1 1 0 8 0 inpcb 328 911 0 896 13 11 2 13 0 8 0 nd6 144 25 0 7 1 0 1 1 0 8 0 pkpcb 40 7 0 7 2 2 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 38 0 38 2 1 1 1 0 8 1 pppxif 1504 2 0 2 1 1 0 1 0 8 0 pfstscr 40 4 0 4 2 2 0 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 5 0 2 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 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 52 0 16 1 0 1 1 0 8 0 pfstkey 128 56 0 20 2 0 2 2 0 8 0 pfstate 384 54 0 19 4 0 4 4 0 8 0 pfrule 1344 27 0 21 2 0 2 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 644 0 238 32 6 26 30 0 8 0 art_table 40 647 0 238 5 0 5 5 0 8 0 art_node 32 139 0 64 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 6 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 24 0 8 1 0 1 1 0 8 0 shmpl 112 55 0 1 2 0 2 2 0 8 0 dirhash 1024 23 0 4 3 0 3 3 0 8 0 dino2pl 256 2710 0 1194 95 0 95 95 0 8 0 ffsino 296 2711 0 1194 117 0 117 117 0 8 0 nchpl 144 3666 0 1961 64 0 64 64 0 8 0 rtmask 32 8 0 8 3 2 1 1 0 8 1 uvmvnodes 80 3232 0 0 66 0 66 66 0 8 0 vnodes 216 3232 0 0 180 0 180 180 0 8 0 namei 1024 11978 0 11974 2 1 1 1 0 8 0 percpumem 16 94 0 45 1 0 1 1 0 8 0 kstatmem 264 72 0 46 2 0 2 2 0 8 0 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 16153 0 16152 9 8 1 8 1 8 0 plimitpl 152 172 0 155 1 0 1 1 0 8 0 sigapl 424 1043 0 968 9 0 9 9 0 8 0 knotepl 120 526 0 0 16 0 16 16 0 8 0 kqueuepl 224 383 0 373 7 5 2 7 0 8 1 pipepl 344 163 0 136 3 0 3 3 0 8 0 fdescpl 528 998 0 967 3 0 3 3 0 8 0 filepl 160 5845 0 5615 17 5 12 16 0 8 1 lockfpl 104 429 0 425 2 1 1 2 0 8 0 lockfspl 48 207 0 203 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 42 0 25 1 0 1 1 0 8 0 ucredpl 104 782 0 767 1 0 1 1 0 8 0 zombiepl 144 1033 0 1030 1 0 1 1 0 8 0 processpl 1248 1043 0 968 6 0 6 6 0 8 0 procpl 656 1975 0 1890 8 0 8 8 0 8 0 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 752 1328 0 1289 18 13 5 17 0 8 0 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 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 105 0 0 14 1 13 14 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 17 0 0 1 0 1 1 0 8 0 mbufpl 256 166 0 0 11 0 11 11 0 8 0 bufpl 280 6183 0 129 433 0 433 433 0 8 0 anonpl 32 8454 0 0 69 0 69 69 0 246 0 amapchunkpl 152 26461 0 25955 29 7 22 27 0 158 1 amappl16 200 3607 0 3577 20 16 4 18 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 129 0 117 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1694 0 1663 3 1 2 2 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 243 0 243 1 1 0 1 0 8 0 amappl8 136 42 0 39 1 0 1 1 0 8 0 amappl7 128 126 0 113 1 0 1 1 0 8 0 amappl6 120 209 0 206 1 0 1 1 0 8 0 amappl5 112 133 0 123 1 0 1 1 0 8 0 amappl4 104 327 0 307 1 0 1 1 0 8 0 amappl3 96 5077 0 4966 4 0 4 4 0 8 0 amappl2 88 715 0 653 2 0 2 2 0 8 0 amappl1 80 11852 0 11245 16 1 15 16 0 8 1 amappl 88 7381 0 7208 5 0 5 5 0 92 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 2 0 1 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 255 0 255 3 3 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 57 0 1 2 0 2 2 0 8 0 uaddrrnd 24 998 0 967 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 998 0 967 1 0 1 1 0 8 0 vmmpekpl 168 9875 0 9835 3 0 3 3 0 8 0 vmmpepl 168 70412 0 68415 103 6 97 102 0 357 1 vmsppl 488 997 0 967 5 0 5 5 0 8 0 rwobjpl 80 24771 0 20539 88 1 87 87 0 8 0 pdppl 4096 2004 0 1934 110 36 74 86 0 8 4 pvpl 32 15458 0 0 126 1 125 125 0 265 0 pmappl 256 997 0 967 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 293 0 55 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff83805ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff83a26468) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a26468) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff80003c459970,ffff800000079a80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x7df37046a8f0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at sys_semop+0x45b: movzwl 0(%rax),%r15d ddb{1}> trace sys_semop(ffff800034ff94a0,ffff800036ffff40,ffff800036fffe90) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff800036ffff40) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036ffff40) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xac30fc3ed10, count: -3