kernel: protection fault trap, code=0 Stopped at sys_semop+0x384: movzwl 0(%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(ffff80003c3f4800,ffff80002a32e870,ffff80002a32e7c0) at sys_semop+0x384 sys/kern/sysv_sem.c:604 syscall(ffff80002a32e870) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a32e870) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe1d05cbc200, count: -3 ddb{0}> show registers rdi 0 rsi 0xfff9 __ALIGN_SIZE+0xeff9 rbp 0xffff80002a32e790 rbx 0xdeaf4152deaf4152 rdx 0 rcx 0xffff80003c3f4800 rax 0xffffffff83813ff0 cpu_info_full_primary+0x1ff0 r8 0x7f7fffffc000 r9 0 r10 0xa3329d827fd16e12 r11 0x3621f07c7409c481 r12 0xfffffff9 r13 0xfffffd806b7534d0 r14 0xffff80002a32e870 r15 0 rip 0xffffffff83032e54 sys_semop+0x384 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff80002a32e6a0 ss 0x10 sys_semop+0x384: movzwl 0(%rbx),%r15d ddb{0}> show proc PROC (syz-executor) tid=500243 pid=55472 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=0xffff80003c3f4fc8,0xffff80003c3f57a0 process=0xffff80002a3cd358 user=0xffff80002a329000, vmspace=0xfffffd80669293f0 estcpu=32, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10416 448524 74011 0 7 0 syz-executor 69111 95058 78966 0 2 0x1044 syz-executor 55472 451751 22773 0 2 0 syz-executor *55472 500243 22773 0 7 0x4000000 syz-executor 55472 477128 22773 0 3 0x4000080 fsleep syz-executor 89844 171250 8505 0 3 0x80 nanoslp syz-executor 89844 520764 8505 0 3 0x4000080 fsleep syz-executor 89844 179700 8505 0 2 0x4000000 syz-executor 89844 130809 8505 0 3 0x4000080 fsleep syz-executor 78966 326298 66262 0 3 0x82 ppwait syz-executor 46686 380878 67319 0 2 0xc80 syz-executor 46686 224604 67319 0 3 0x4000000 smrbar syz-executor 81143 227337 8747 0 3 0x3000 suspend syz-executor 81143 418954 8747 0 2 0x4081000 syz-executor 81143 436302 8747 0 3 0x4081000 inode syz-executor 81143 113415 8747 0 3 0x4081000 inode syz-executor 60464 274427 0 0 3 0x14200 acct acct 74011 277773 66262 0 3 0x82 nanoslp syz-executor 57397 201775 66262 0 3 0x82 nanoslp syz-executor 10373 512055 0 0 3 0x14200 bored sosplice 22773 227554 66262 0 2 0xc82 syz-executor 8505 215327 66262 0 3 0x82 nanoslp syz-executor 73171 441120 66262 0 2 0x2 syz-executor 67319 240448 66262 0 3 0x82 nanoslp syz-executor 8747 334727 66262 0 3 0x82 nanoslp syz-executor 66262 228198 26893 0 3 0x82 kqread syz-executor 26893 24302 87847 0 3 0x10008a sigsusp ksh 87847 368493 81451 0 3 0x98 kqread sshd-session 81451 439881 32383 0 3 0x92 kqread sshd-session 22862 230607 1 0 3 0x100083 ttyin getty 32383 201427 1 0 3 0x88 kqread sshd 3125 232539 51748 74 3 0x1100092 bpf pflogd 51748 209741 1 0 3 0x80 sbwait pflogd 31881 344022 35788 73 3 0x1100090 kqread syslogd 35788 427536 1 0 3 0x100082 sbwait syslogd 89503 200227 1 0 3 0x100080 kqread resolvd 59671 76340 24794 77 3 0x100092 kqread dhcpleased 58027 105568 24794 77 3 0x100092 kqread dhcpleased 24794 6611 1 0 3 0x80 kqread dhcpleased 13451 228433 0 0 3 0x14200 bored smr 72776 470531 0 0 2 0x14200 zerothread 82207 373054 0 0 3 0x14200 aiodoned aiodoned 8501 61180 0 0 3 0x14200 syncer update 63147 358887 0 0 3 0x14200 cleaner cleaner 26924 444859 0 0 3 0x14200 reaper reaper 76816 40297 0 0 3 0x14200 pgdaemon pagedaemon 59130 201473 0 0 3 0x14200 bored viomb 41896 442722 0 0 3 0x40014200 acpi0 acpi0 93715 106053 0 0 3 0x40014200 idle1 52015 3837 0 0 3 0x14200 bored softnet1 33156 499523 0 0 3 0x14200 bored softnet0 98530 308214 0 0 3 0x14200 smrbar systqmp 93767 306911 0 0 3 0x14200 bored systq 56336 317383 0 0 3 0x14200 tmoslp softclockmp 66889 382370 0 0 3 0x40014200 tmoslp softclock 38972 334064 0 0 3 0x40014200 idle0 1 414622 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 55472 (syz-executor) thread 0xffff80003c3f4800 (500243) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839b30d0) #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 89844 (syz-executor) thread 0xffff80003c3f4a98 (179700) shared rwlock vmmaplk r = 0 (0xfffffd8066929308) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvm_vslock_device+0x149 sys/uvm/uvm_glue.c:173 #3 physio+0x257 sys/kern/kern_physio.c:139 #4 spec_read+0x14b sys/kern/spec_vnops.c:215 #5 VOP_READ+0x101 sys/kern/vfs_vops.c:227 #6 vn_read+0x17b sys/kern/vfs_vnops.c:369 #7 dofilereadv+0x25a sys/kern/sys_generic.c:252 #8 sys_preadv+0xe3 sys/kern/vfs_syscalls.c:3336 #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 81143 (syz-executor) thread 0xffff8000fffee2b0 (418954) exclusive rrwlock inode r = 0 (0xfffffd80787ef360) #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 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 81143 (syz-executor) thread 0xffff8000fffeed10 (113415) exclusive rrwlock inode r = 0 (0xfffffd806e331d68) #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 dofchmodat+0x162 sys/kern/vfs_syscalls.c:2382 #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 98530 (systqmp) thread 0xffff8000ffffe7c8 (308214) shared rwlock systqmp r = 0 (0xffffffff8383fc48) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10212 11065K 11225K 166960K 12272 0 pcb 17 14K 16K 166960K 293 0 rtable 126 7K 8K 166960K 454 0 pf 32 17K 81K 166960K 139 0 ifaddr 25 3K 8K 166960K 94 0 ifgroup 45 2K 2K 166960K 155 0 sysctl 4 1K 9K 166960K 11 0 counters 64 36K 37K 166960K 168 0 ioctlops 0 0K 4K 166960K 1787 0 iov 0 0K 22K 166960K 53 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1368 86K 86K 166960K 2191 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 22 17K 17K 166960K 45 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 106K 166960K 1107 0 sigio 0 0K 0K 166960K 21 0 proc 73 115K 180K 166960K 710 0 subproc 72 4K 4K 166960K 112 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 162 0 in_multi 41 3K 7K 166960K 187 0 ether_multi 1 0K 0K 166960K 17 0 mrt 0 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 1 0K 1K 166960K 579 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 235 159K 174K 166960K 11849 0 UVM aobj 84 3K 4K 166960K 88 0 pinsyscall 44 88K 106K 166960K 2287 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 62 0 NDP 10 0K 2K 166960K 65 0 temp 85 8656K 8765K 166960K 47889 0 kqueue 14 22K 28K 166960K 199 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 120 137 0 134 1 0 1 1 0 8 0 rtentry 176 147 0 104 5 1 4 5 0 8 0 unpcb 144 855 0 838 11 5 6 6 0 8 5 syncache 336 6 0 6 3 2 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 343 0 338 7 3 4 7 0 8 3 arp 136 19 0 10 1 0 1 1 0 8 0 inpcb 328 1134 0 1125 9 2 7 7 0 8 5 nd6 152 25 0 19 1 0 1 1 0 8 0 pkpcb 40 5 0 5 3 3 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1192 35 0 34 2 1 1 1 0 8 0 pppxif 1504 4 0 4 3 2 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 10 0 4 1 0 1 1 0 482 0 pffrnode 88 8 0 2 1 0 1 1 0 8 0 pffrent 40 15 3 9 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 1 0 0 1 0 1 1 0 8 0 pfstitem 24 70 0 22 1 0 1 1 0 8 0 pfstkey 128 74 0 26 2 0 2 2 0 8 0 pfstate 384 70 0 24 5 0 5 5 0 8 0 pfrule 1344 30 0 25 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 670 0 473 30 10 20 30 0 8 4 art_table 40 673 0 473 5 0 5 5 0 8 0 art_node 32 147 0 108 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 6 3 2 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 38 0 19 1 0 1 1 0 8 0 shmpl 112 85 0 4 3 0 3 3 0 8 0 dirhash 1024 34 0 17 3 0 3 3 0 8 0 dino2pl 256 3442 0 1930 96 0 96 96 0 8 0 ffsino 296 3442 0 1930 118 0 118 118 0 8 0 nchpl 144 4958 0 3257 64 0 64 64 0 8 0 rtmask 32 8 0 8 3 2 1 1 0 8 1 vnodes 216 3564 0 0 198 0 198 198 0 8 0 namei 1024 17139 0 17137 4 3 1 2 0 8 0 percpumem 16 99 0 52 1 0 1 1 0 8 0 kstatmem 264 90 0 66 3 1 2 3 0 8 0 scsiplug 72 3 0 3 3 3 0 1 0 8 0 scxspl 216 32058 0 32058 13 11 2 8 1 8 2 plimitpl 152 280 0 260 1 0 1 1 0 8 0 sigapl 424 1423 0 1373 9 1 8 8 0 8 1 knotepl 120 319 0 0 10 0 10 10 0 8 0 kqueuepl 224 363 0 353 4 2 2 3 0 8 1 pipepl 344 199 0 172 3 0 3 3 0 8 0 fdescpl 528 1378 0 1346 3 0 3 3 0 8 0 filepl 160 8652 0 8399 22 7 15 18 0 8 3 lockfpl 104 302 0 298 1 0 1 1 0 8 0 lockfspl 48 138 0 135 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 82 0 65 1 0 1 1 0 8 0 ucredpl 104 1382 0 1368 1 0 1 1 0 8 0 zombiepl 144 1824 0 1822 1 0 1 1 0 8 0 processpl 1232 1423 0 1373 7 1 6 6 0 8 2 procpl 664 3165 0 3106 8 0 8 8 0 8 2 sosppl 168 13 0 13 3 2 1 1 0 8 1 sockpl 752 2156 0 2127 32 20 12 18 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 132 0 0 17 0 17 17 0 8 0 mcl2k 2048 82 0 0 11 0 11 11 0 8 0 mtagpl 96 22 0 0 1 0 1 1 0 8 0 mbufpl 256 244 0 0 15 0 15 15 0 8 0 bufpl 280 13255 0 7111 440 0 440 440 0 8 0 anonpl 32 12765 0 0 103 0 103 103 0 246 0 amapchunkpl 152 39591 0 39078 42 13 29 31 0 158 2 amappl16 200 4850 0 4818 41 22 19 31 0 8 8 amappl15 192 6 0 5 1 0 1 1 0 8 0 amappl14 184 128 0 116 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 2072 0 2043 4 1 3 3 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 258 0 258 1 1 0 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 117 0 104 1 0 1 1 0 8 0 amappl6 120 209 0 204 1 0 1 1 0 8 0 amappl5 112 136 0 127 1 0 1 1 0 8 0 amappl4 104 306 0 286 1 0 1 1 0 8 0 amappl3 96 6854 0 6761 5 1 4 4 0 8 0 amappl2 88 1633 0 1555 2 0 2 2 0 8 0 amappl1 80 12941 0 12347 16 1 15 15 0 8 0 amappl 88 10962 0 10800 5 0 5 5 0 92 0 uvmvnodes 80 3564 0 0 73 0 73 73 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 1 1 1 0 8 1 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 128 253 0 253 1 1 0 1 0 8 0 dma64 64 7 0 7 2 1 1 1 0 8 1 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 87 0 4 2 0 2 2 0 8 0 uaddrrnd 24 1377 0 1346 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1377 0 1346 1 0 1 1 0 8 0 vmmpekpl 168 12655 0 12604 3 0 3 3 0 8 0 vmmpepl 168 92554 0 90602 122 7 115 116 0 357 8 vmsppl 488 1376 0 1346 6 1 5 5 0 8 0 rwobjpl 80 30292 0 25708 100 0 100 100 0 8 0 pdppl 4096 2762 0 2692 110 36 74 88 0 8 4 pvpl 32 19488 0 0 158 0 158 158 0 265 0 pmappl 256 1376 0 1346 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 310 0 57 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff80003c3f4800,ffff80002a32e870,ffff80002a32e7c0) at sys_semop+0x384 sys/kern/sysv_sem.c:604 syscall(ffff80002a32e870) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a32e870) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe1d05cbc200, 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(ffffffff839b2ec8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b2ec8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 end trace frame: 0x0, count: -4