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(ffff800037c07ca8,ffff80003c485720,ffff80003c485670) at sys_semop+0x384 sys/kern/sysv_sem.c:604 syscall(ffff80003c485720) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c485720) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x59089802180, count: -3 ddb{0}> show registers rdi 0 rsi 0xf000 __ALIGN_SIZE+0xe000 rbp 0xffff80003c485640 rbx 0xdeafbeaddeafbeb9 rdx 0 rcx 0xffff800037c07ca8 rax 0xffffffff83890ff0 cpu_info_full_primary+0x1ff0 r8 0x7f7fffffc000 r9 0 r10 0xf14258f7db575455 r11 0x5a28903d2c7da742 r12 0xfffff000 r13 0xfffffd80664bd690 r14 0xffff80003c485720 r15 0x1 rip 0xffffffff817b1494 sys_semop+0x384 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff80003c485550 ss 0x10 sys_semop+0x384: movzwl 0(%rbx),%r15d ddb{0}> show proc PROC (syz-executor) tid=496827 pid=63350 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=0xffff800037c06a80,0xffff800037c06030 process=0xffff80003c429360 user=0xffff80003c480000, vmspace=0xfffffd8063ec7028 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 63350 166327 79084 0 7 0 syz-executor *63350 496827 79084 0 7 0x4000000 syz-executor 63350 166446 79084 0 3 0x4000080 fsleep syz-executor 63350 387971 79084 0 2 0x4000000 syz-executor 57781 284724 74340 0 2 0 syz-executor 57781 449128 74340 0 3 0x4000080 fsleep syz-executor 48370 325627 88232 0 3 0x80 nanoslp syz-executor 48370 44135 88232 0 3 0x4000080 kqpoll syz-executor 48370 147000 88232 0 3 0x4000080 fsleep syz-executor 13729 160599 13483 0 2 0 syz-executor 13729 248802 13483 0 3 0x4000080 kqpoll syz-executor 13729 345511 13483 0 3 0x4000080 fsleep syz-executor 44542 28501 18332 60929 2 0x10 syz-executor 44542 260821 18332 60929 3 0x4000090 msgwait syz-executor 44542 217445 18332 60929 3 0x4000090 fsleep syz-executor 13483 27291 37899 0 3 0x82 nanoslp syz-executor 92235 239552 37899 0 3 0x82 wait syz-executor 18332 244208 37899 0 3 0x82 nanoslp syz-executor 79084 445639 37899 0 3 0x82 nanoslp syz-executor 30601 417984 37899 0 3 0x82 nanoslp syz-executor 74340 343193 37899 0 3 0x82 nanoslp syz-executor 88232 119771 37899 0 3 0x82 nanoslp syz-executor 69892 271730 37899 0 2 0x2 syz-executor 37899 174587 50374 0 2 0x2 syz-executor 50374 514065 58912 0 3 0x10008a sigsusp ksh 58912 330692 64790 0 3 0x98 kqread sshd-session 64790 464795 76621 0 3 0x92 kqread sshd-session 8411 266011 1 0 3 0x100083 ttyopn getty 76621 176552 1 0 3 0x88 kqread sshd 1385 299526 54984 74 3 0x1100092 bpf pflogd 54984 184173 1 0 3 0x80 sbwait pflogd 4774 386245 93721 73 3 0x1100090 kqread syslogd 93721 20718 1 0 3 0x100082 sbwait syslogd 20740 256209 1 0 3 0x100080 kqread resolvd 91210 8392 56190 77 3 0x100092 kqread dhcpleased 35002 35697 56190 77 3 0x100092 kqread dhcpleased 56190 218548 1 0 3 0x80 kqread dhcpleased 72197 109518 0 0 3 0x14200 bored smr 10 190779 0 0 2 0x14200 zerothread 83560 126207 0 0 3 0x14200 aiodoned aiodoned 57726 382920 0 0 3 0x14200 syncer update 38896 11211 0 0 3 0x14200 cleaner cleaner 1351 239391 0 0 3 0x14200 reaper reaper 89489 97181 0 0 3 0x14200 pgdaemon pagedaemon 93496 156554 0 0 3 0x14200 bored viomb 35445 26105 0 0 3 0x40014200 acpi0 acpi0 80041 28910 0 0 3 0x40014200 idle1 32515 352966 0 0 3 0x14200 bored softnet1 80887 207078 0 0 3 0x14200 bored softnet0 14831 236079 0 0 3 0x14200 bored systqmp 26319 373009 0 0 3 0x14200 bored systq 95340 214553 0 0 3 0x14200 tmoslp softclockmp 53203 147428 0 0 3 0x40014200 tmoslp softclock 25397 313615 0 0 3 0x40014200 idle0 1 281668 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 63350 (syz-executor) thread 0xffff800037c07ca8 (496827) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839ed090) #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 69892 (syz-executor) thread 0xffff8000ffffdc90 (271730) exclusive rrwlock inode r = 0 (0xfffffd806f1fd578) #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:775 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10248 11302K 11434K 166960K 12420 0 pcb 17 16K 18K 166960K 236 0 rtable 220 8K 8K 166960K 423 0 pf 37 18K 21K 166960K 105 0 ifaddr 39 6K 8K 166960K 78 0 ifgroup 53 2K 2K 166960K 111 0 sysctl 3 1K 9K 166960K 10 0 counters 70 37K 38K 166960K 136 0 ioctlops 0 0K 4K 166960K 1617 0 iov 0 0K 16K 166960K 101 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1459 92K 92K 166960K 2135 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 17 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 110K 166960K 699 0 sigio 0 0K 0K 166960K 13 0 proc 74 115K 147K 166960K 623 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 68 0 in_multi 87 6K 7K 166960K 135 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 541 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 253 160K 174K 166960K 8354 0 UVM aobj 25 12K 12K 166960K 26 0 pinsyscall 42 84K 101K 166960K 1855 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 117 0 NDP 12 0K 2K 166960K 53 0 temp 52 8674K 8744K 166960K 34570 0 kqueue 14 22K 29K 166960K 127 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 120 103 0 100 2 0 2 2 0 8 1 rtentry 176 131 0 34 6 1 5 6 0 8 0 unpcb 144 438 0 421 4 1 3 3 0 8 2 syncache 336 7 0 7 2 1 1 1 0 8 1 tcpcb 736 128 0 121 1 0 1 1 0 8 0 arp 136 21 0 8 1 0 1 1 0 8 0 inpcb 328 1010 0 997 13 4 9 12 0 8 7 nd6 152 29 0 6 1 0 1 1 0 8 0 pkpcb 40 6 0 4 2 1 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 27 0 26 2 1 1 1 0 8 0 pppxif 1504 2 0 2 1 1 0 1 0 8 0 pfstscr 40 2 0 2 2 2 0 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 69 0 68 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 1 0 1 1 0 8 1 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 38 0 8 1 0 1 1 0 8 0 pfstkey 128 42 0 12 2 0 2 2 0 8 0 pfstate 448 40 0 11 4 0 4 4 0 8 0 pfrule 1344 26 0 19 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 520 0 108 30 4 26 29 0 8 0 art_table 40 521 0 108 5 0 5 5 0 8 0 art_node 32 131 0 44 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 4 2 1 1 1 0 8 0 semapl 112 14 0 5 1 0 1 1 0 8 0 shmpl 112 18 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2624 0 1118 95 0 95 95 0 8 0 ffsino 296 2624 0 1118 117 0 117 117 0 8 0 nchpl 144 3597 0 1894 64 0 64 64 0 8 0 rtmask 32 8 0 8 2 1 1 1 0 8 1 vnodes 216 3278 0 0 183 0 183 183 0 8 0 namei 1024 12633 0 12633 2 1 1 2 0 8 1 percpumem 16 83 0 33 1 0 1 1 0 8 0 vcpupl 3968 5 0 0 1 0 1 1 0 8 0 vmpool 840 5 0 0 1 0 1 1 0 8 0 kstatmem 264 68 0 42 4 1 3 3 0 8 1 scsiplug 72 4 0 4 2 1 1 1 0 8 1 scxspl 216 21600 0 21600 6 2 4 4 1 8 4 plimitpl 152 283 0 266 1 0 1 1 0 8 0 sigapl 424 1008 0 961 7 1 6 7 0 8 0 knotepl 120 550 0 0 17 0 17 17 0 8 0 kqueuepl 224 231 0 218 4 3 1 3 0 8 0 pipepl 344 287 0 257 9 3 6 6 0 8 3 fdescpl 528 985 0 954 3 0 3 3 0 8 0 filepl 160 6376 0 6142 23 5 18 18 0 8 6 lockfpl 104 332 0 329 2 0 2 2 0 8 1 lockfspl 48 153 0 150 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 75 0 58 1 0 1 1 0 8 0 ucredpl 104 759 0 745 1 0 1 1 0 8 0 zombiepl 144 1194 0 1192 2 1 1 1 0 8 0 processpl 1232 1008 0 961 5 0 5 5 0 8 0 procpl 664 1985 0 1928 6 0 6 6 0 8 0 sosppl 176 2 0 2 1 1 0 1 0 8 0 sockpl 752 1566 0 1530 21 10 11 20 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 26 0 0 1 0 1 1 0 8 0 mbufpl 256 270 0 0 17 0 17 17 0 8 0 bufpl 280 9372 0 3235 439 0 439 439 0 8 0 anonpl 32 10611 0 0 86 0 86 86 0 246 0 amapchunkpl 152 27855 0 27335 37 8 29 30 0 158 6 amappl16 200 4621 0 4586 31 12 19 24 0 8 8 amappl15 192 7 0 6 1 0 1 1 0 8 0 amappl14 184 9 0 9 1 1 0 1 0 8 0 amappl13 176 440 0 439 1 0 1 1 0 8 0 amappl12 168 1357 0 1315 3 0 3 3 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 51 0 37 1 0 1 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 28 0 25 1 0 1 1 0 8 0 amappl7 128 81 0 80 1 0 1 1 0 8 0 amappl6 120 292 0 279 1 0 1 1 0 8 0 amappl5 112 88 0 76 1 0 1 1 0 8 0 amappl4 104 432 0 402 1 0 1 1 0 8 0 amappl3 96 5138 0 5027 5 1 4 4 0 8 0 amappl2 88 546 0 485 2 0 2 2 0 8 0 amappl1 80 11980 0 11378 14 0 14 14 0 8 0 amappl 88 7509 0 7334 5 0 5 5 0 92 0 uvmvnodes 80 123 0 0 3 0 3 3 0 8 0 dma65536 65536 1 0 1 1 1 0 1 0 8 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 1 1 1 0 8 1 dma128 128 256 0 256 2 1 1 1 0 8 1 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 25 0 1 1 0 1 1 0 8 0 uaddrrnd 24 985 0 954 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 985 0 954 1 0 1 1 0 8 0 vmmpekpl 168 10187 0 10147 3 0 3 3 0 8 0 vmmpepl 168 70735 0 68785 115 10 105 105 0 357 8 vmsppl 488 984 0 954 6 1 5 5 0 8 0 rwobjpl 80 22786 0 21684 32 0 32 32 0 8 1 pdppl 4096 1987 0 1913 107 29 78 83 0 8 4 pvpl 32 17308 0 0 140 0 140 140 0 265 0 pmappl 256 989 0 954 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 293 0 39 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff800037c07ca8,ffff80003c485720,ffff80003c485670) at sys_semop+0x384 sys/kern/sysv_sem.c:604 syscall(ffff80003c485720) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c485720) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x59089802180, 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: 0x771ededfc400, count: -3