kernel: protection fault trap, code=0 Stopped at sys_semop+0x352: movzwl 0x8(%rbx),%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(ffff80003bfffcc0,ffff80003bffc700,ffff80003bffc650) at sys_semop+0x352 sys/kern/sysv_sem.c:622 syscall(ffff80003bffc700) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bffc700) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd3141f6c330, count: -3 ddb{0}> show registers rdi 0 rsi 0x6966 __ALIGN_SIZE+0x5966 rbp 0xffff80003bffc620 rbx 0xdeaf4152deb1777a rdx 0 rcx 0xffff80003bfffcc0 rax 0xffffffff83862ff0 cpu_info_full_primary+0x1ff0 r8 0x7f7fffffc000 r9 0 r10 0x8602537ba0abf23d r11 0xa62ed2a5a07d0e6a r12 0x6966 __ALIGN_SIZE+0x5966 r13 0xfffffd806e2eb5b0 r14 0xffff80003bffc700 r15 0x6966 __ALIGN_SIZE+0x5966 rip 0xffffffff82bf7a02 sys_semop+0x352 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003bffc530 ss 0x10 sys_semop+0x352: movzwl 0x8(%rbx),%r15d ddb{0}> show proc PROC (syz-executor) tid=369553 pid=36930 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003bfff260,0xffff80003c4a6aa0 process=0xffff8000fffea698 user=0xffff80003bff7000, vmspace=0xfffffd806c8f8020 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 30855 202616 31173 0 2 0 syz-executor 30855 491079 31173 0 2 0x4000000 syz-executor 94144 502810 15991 0 2 0 syz-executor 38848 78861 95628 0 2 0 syz-executor 38848 395551 95628 0 3 0x4000080 fsleep syz-executor 36930 188613 7131 0 2 0 syz-executor 36930 464986 7131 0 7 0x4000000 syz-executor *36930 369553 7131 0 7 0x4000000 syz-executor 36930 398990 7131 0 3 0x4000080 fsleep syz-executor 73211 33056 67699 0 2 0 syz-executor 73211 91327 67699 0 3 0x4000080 fsleep syz-executor 7792 498787 49855 0 2 0x1 syz-executor 7792 430442 49855 0 3 0x4000080 fsleep syz-executor 52014 273630 60912 0 3 0x80 nanoslp syz-executor 52014 126805 60912 0 3 0x4000080 ttyout syz-executor 52014 415857 60912 0 3 0x4000080 fsleep syz-executor 67699 87164 85760 0 3 0x82 nanoslp syz-executor 89774 366886 0 0 3 0x14200 acct acct 99248 426607 1 0 3 0x100083 ttyopn getty 60912 458123 85760 0 3 0x82 nanoslp syz-executor 31173 383601 85760 0 3 0x82 nanoslp syz-executor 49855 329690 85760 0 3 0x82 nanoslp syz-executor 80809 439421 85760 0 3 0x82 wait syz-executor 7131 354150 85760 0 3 0x82 nanoslp syz-executor 15991 509281 85760 0 3 0x82 nanoslp syz-executor 95628 261395 85760 0 3 0x82 nanoslp syz-executor 85760 446620 80730 0 2 0x3 syz-executor 80730 280802 64412 0 3 0x10008a sigsusp ksh 64412 455973 58621 0 3 0x98 kqread sshd-session 58621 511061 38223 0 3 0x92 kqread sshd-session 38223 49721 1 0 3 0x88 kqread sshd 58264 120985 26807 74 3 0x1100092 bpf pflogd 26807 378336 1 0 3 0x80 sbwait pflogd 10577 271426 2285 73 3 0x1100090 kqread syslogd 2285 145249 1 0 3 0x100082 sbwait syslogd 62047 287117 1 0 3 0x100080 kqread resolvd 96249 88785 55969 77 3 0x100092 kqread dhcpleased 41907 449876 55969 77 3 0x100092 kqread dhcpleased 55969 520737 1 0 3 0x80 kqread dhcpleased 53387 162814 0 0 3 0x14200 bored smr 97305 180567 0 0 2 0x14200 zerothread 63730 11317 0 0 3 0x14200 aiodoned aiodoned 58437 513433 0 0 3 0x14200 syncer update 65630 489612 0 0 3 0x14200 cleaner cleaner 44579 515899 0 0 3 0x14200 reaper reaper 77890 267074 0 0 3 0x14200 pgdaemon pagedaemon 82496 505520 0 0 3 0x14200 bored viomb 76071 425573 0 0 3 0x40014200 acpi0 acpi0 19808 480055 0 0 3 0x40014200 idle1 5439 194021 0 0 3 0x14200 bored softnet1 51216 406929 0 0 3 0x14200 bored softnet0 3110 184363 0 0 3 0x14200 bored systqmp 79840 504208 0 0 3 0x14200 bored systq 52947 279315 0 0 3 0x14200 tmoslp softclockmp 69424 17384 0 0 3 0x40014200 tmoslp softclock 21516 211669 0 0 3 0x40014200 idle0 1 58349 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 36930 (syz-executor) thread 0xffff80003bffea98 (188613) exclusive rwlock vmmaplk r = 0 (0xfffffd806c8f8120) #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:5171 #3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3064 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #6 Xsyscall+0x128 Process 36930 (syz-executor) thread 0xffff80003bfff260 (464986) exclusive rrwlock inode r = 0 (0xfffffd806bd910e8) #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 domknodat+0xb4 sys/kern/vfs_syscalls.c:1592 #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 Process 36930 (syz-executor) thread 0xffff80003bfffcc0 (369553) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8394e9d0) #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10246 11120K 11746K 166960K 14676 0 pcb 17 18K 22K 166960K 610 0 rtable 228 11K 11K 166960K 598 0 pf 40 18K 22K 166960K 269 0 ifaddr 40 7K 7K 166960K 134 0 ifgroup 64 2K 3K 166960K 247 0 sysctl 4 1K 9K 166960K 23 0 counters 72 37K 38K 166960K 408 0 ioctlops 0 0K 4K 166960K 2115 0 iov 0 0K 24K 166960K 99 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1460 92K 92K 166960K 3621 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 25 0 VM map 2 1K 1K 166960K 2 0 sem 16 136K 136K 166960K 76 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 110K 166960K 1999 0 sigio 0 0K 0K 166960K 117 0 proc 73 115K 147K 166960K 757 0 subproc 72 4K 4K 166960K 83 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 434 0 in_multi 87 6K 7K 166960K 179 0 ether_multi 1 0K 0K 166960K 23 0 mrt 2 0K 0K 166960K 22 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 1211 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 252 169K 191K 166960K 20471 0 UVM aobj 151 139K 139K 166960K 157 0 pinsyscall 43 86K 103K 166960K 3201 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 178 0 NDP 13 0K 2K 166960K 97 0 temp 77 8680K 8929K 166960K 97752 0 kqueue 13 20K 32K 166960K 356 0 SYN cache 2 8K 16K 166960K 3 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 120 217 0 214 2 1 1 2 0 8 0 rtentry 176 169 0 79 6 0 6 6 0 8 0 unpcb 144 1577 0 1560 16 14 2 6 0 8 1 syncache 336 9 0 9 5 5 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 736 870 0 864 25 22 3 7 0 8 2 arp 136 26 0 12 1 0 1 1 0 8 0 inpcb 328 2781 0 2772 30 26 4 15 0 8 3 nd6 152 30 0 6 1 0 1 1 0 8 0 pkpcb 40 12 0 12 5 4 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 149 0 149 4 3 1 1 0 8 1 pppxif 1504 12 0 12 4 4 0 1 0 8 0 pfstscr 40 5 0 3 1 0 1 1 0 8 0 pffrag 232 24 0 14 1 0 1 1 0 482 0 pffrnode 88 20 0 11 1 0 1 1 0 8 0 pffrent 40 85 0 75 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 2 0 2 2 2 0 1 0 8 0 pfstitem 24 124 0 64 1 0 1 1 0 8 0 pfstkey 128 130 0 71 2 0 2 2 0 8 0 pfstate 448 125 0 67 7 0 7 7 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 730 0 318 32 5 27 29 0 8 0 art_table 40 733 0 318 5 0 5 5 0 8 0 art_node 32 167 0 89 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 8 1 0 1 1 0 8 0 semupl 112 3 0 3 3 3 0 1 0 8 0 semapl 112 66 0 53 1 0 1 1 0 8 0 shmpl 112 85 0 4 3 0 3 3 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 5181 0 3679 96 0 96 96 0 8 0 ffsino 296 5181 0 3679 118 0 118 118 0 8 0 nchpl 144 8031 0 6326 64 0 64 64 0 8 0 rtmask 32 14 0 14 6 5 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 28344 0 28343 2 1 1 1 0 8 0 percpumem 16 219 0 168 1 0 1 1 0 8 0 vcpupl 3968 68 0 1 10 1 9 9 0 8 0 vmpool 840 69 0 2 9 1 8 8 0 8 0 kstatmem 264 160 0 130 6 3 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 6 0 6 5 5 0 1 0 8 0 scxspl 216 44861 0 44861 11 10 1 8 1 8 1 plimitpl 152 864 0 845 2 1 1 2 0 8 0 sigapl 424 2332 0 2283 8 1 7 8 0 8 0 knotepl 120 707 0 0 22 0 22 22 0 8 0 kqueuepl 224 886 0 877 13 12 1 5 0 8 0 pipepl 344 395 0 368 12 4 8 9 0 8 5 fdescpl 528 2292 0 2260 3 0 3 3 0 8 0 filepl 160 17133 0 16912 46 31 15 19 0 8 4 lockfpl 104 686 0 683 2 1 1 2 0 8 0 lockfspl 48 247 0 244 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 66 0 49 1 0 1 1 0 8 0 ucredpl 104 2594 0 2580 1 0 1 1 0 8 0 zombiepl 144 2691 0 2690 1 0 1 1 0 8 0 processpl 1232 2332 0 2283 6 1 5 6 0 8 0 procpl 664 5496 0 5438 8 2 6 8 0 8 0 sosppl 176 12 0 12 4 3 1 1 0 8 1 sockpl 752 4631 0 4602 60 52 8 24 0 8 4 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 49 0 0 6 0 6 6 0 8 0 mtagpl 96 116 0 0 3 0 3 3 0 8 0 mbufpl 256 1295 0 0 80 0 80 80 0 8 0 bufpl 280 18147 0 12010 439 0 439 439 0 8 0 anonpl 32 11326 0 0 92 0 92 92 0 246 0 amapchunkpl 152 69486 0 68911 58 25 33 42 0 158 7 amappl16 200 7436 0 7363 71 64 7 27 0 8 1 amappl15 192 20 0 20 1 1 0 1 0 8 0 amappl14 184 5 0 5 1 1 0 1 0 8 0 amappl13 176 448 0 447 1 0 1 1 0 8 0 amappl12 168 2692 0 2649 3 0 3 3 0 8 0 amappl11 160 28 0 27 1 0 1 1 0 8 0 amappl10 152 58 0 44 1 0 1 1 0 8 0 amappl9 144 266 0 266 1 1 0 1 0 8 0 amappl8 136 31 0 28 1 0 1 1 0 8 0 amappl7 128 88 0 85 1 0 1 1 0 8 0 amappl6 120 350 0 336 1 0 1 1 0 8 0 amappl5 112 84 0 72 1 0 1 1 0 8 0 amappl4 104 501 0 471 1 0 1 1 0 8 0 amappl3 96 12313 0 12223 4 1 3 3 0 8 0 amappl2 88 2462 0 2384 2 0 2 2 0 8 0 amappl1 80 18317 0 17720 15 1 14 15 0 8 0 amappl 88 19386 0 19213 5 0 5 5 0 92 0 uvmvnodes 80 162 0 0 4 0 4 4 0 8 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 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 8 0 8 3 3 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 21 0 20 1 0 1 1 0 8 0 aobjpl 72 156 0 6 3 0 3 3 0 8 0 uaddrrnd 24 2292 0 2260 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2292 0 2260 1 0 1 1 0 8 0 vmmpekpl 168 19956 0 19911 3 0 3 3 0 8 0 vmmpepl 168 150656 0 148640 132 35 97 108 0 357 5 vmsppl 488 2291 0 2260 7 2 5 5 0 8 0 rwobjpl 80 40585 0 39300 35 5 30 32 0 8 0 pdppl 4096 4729 0 4591 187 49 138 142 0 8 0 pvpl 32 17631 0 0 144 1 143 143 0 265 0 pmappl 256 2360 0 2262 7 0 7 7 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 479 0 86 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff80003bfffcc0,ffff80003bffc700,ffff80003bffc650) at sys_semop+0x352 sys/kern/sysv_sem.c:622 syscall(ffff80003bffc700) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bffc700) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd3141f6c330, 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 __mp_lock(ffffffff8394e7c8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8394e7c8) at __mp_lock+0x199 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff8394e7c8,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 pool_get(ffffffff839c83b8,9) at pool_get+0x27e sys/kern/subr_pool.c:591 cache_enter(fffffd806b368298,fffffd806b368298,ffff80003c4e5568) at cache_enter+0x131 sys/kern/vfs_cache.c:361 ufs_lookup() at ufs_lookup+0x1b8b sys/ufs/ufs/ufs_lookup.c:587 VOP_LOOKUP(fffffd806b368298,ffff80003c4e5538,ffff80003c4e5568) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c4e5508) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80003c4e5508) at namei+0x7ca sys/kern/vfs_lookup.c:250 domknodat(ffff80003bfff260,ffffff9c,200000000000,2100,5f00) at domknodat+0xb4 sys/kern/vfs_syscalls.c:1592 syscall(ffff80003c4e5700) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4e5700) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd3157426b20, count: -14