kernel: protection fault trap, code=0 Stopped at sys_semop+0x3ae: movzwl 0x8(%rax,%rcx,4),%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(ffff800031fe67d8,ffff800038bfa7d0,ffff800038bfa720) at sys_semop+0x3ae sys/kern/sysv_sem.c:620 syscall(ffff800038bfa7d0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800038bfa7d0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd8bd9c38860, count: -3 ddb{0}> show registers rdi 0 rsi 0x101 rbp 0xffff800038bfa6f0 rbx 0 rdx 0 rcx 0x60 rax 0xdeaf4152deaf4152 r8 0x7f7fffffc000 r9 0 r10 0xff359a4590bd8e16 r11 0xd234621e69d3958e r12 0xffff8000014e0504 r13 0x101 r14 0xffff800038bfa7d0 r15 0x101 rip 0xffffffff8199a14e sys_semop+0x3ae cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800038bfa5d0 ss 0x10 sys_semop+0x3ae: movzwl 0x8(%rax,%rcx,4),%r15d ddb{0}> show proc PROC (syz-executor) tid=189678 pid=13144 tcnt=3 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=0xffff800031fe6cf8,0xffff800031fe7c68 process=0xffff8000fffe9c70 user=0xffff800038bf5000, vmspace=0xfffffd8061f36b68 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 13144 135253 79961 0 7 0 syz-executor *13144 189678 79961 0 7 0x4000000 syz-executor 13144 455244 79961 0 3 0x4000080 fsleep syz-executor 10052 331951 9090 0 2 0 syz-executor 10052 36164 9090 0 3 0x4000080 fsleep syz-executor 10052 156371 9090 0 2 0x4000000 syz-executor 67670 201838 12632 0 2 0 syz-executor 67670 513829 12632 0 3 0x4000080 kqsel syz-executor 67670 253725 12632 0 2 0x4000000 syz-executor 56746 471976 13396 0 2 0 syz-executor 11227 193274 0 0 3 0x14200 acct acct 46185 150807 42522 0 2 0x2 syz-executor 79961 322986 42522 0 3 0x82 nanoslp syz-executor 38695 138039 42522 0 2 0x2 syz-executor 20043 115502 0 0 3 0x14280 nfsidl nfsio 58215 79063 0 0 3 0x14280 nfsidl nfsio 99045 171599 0 0 3 0x14280 nfsidl nfsio 65232 463812 0 0 3 0x14280 nfsidl nfsio 41090 18837 0 0 3 0x14280 nfsidl nfsio 10347 285516 0 0 3 0x14280 nfsidl nfsio 62541 362141 0 0 3 0x14280 nfsidl nfsio 74252 324911 0 0 3 0x14280 nfsidl nfsio 47282 420906 0 0 3 0x14280 nfsidl nfsio 77024 252400 0 0 3 0x14280 nfsidl nfsio 59524 24872 0 0 3 0x14280 nfsidl nfsio 93784 509538 0 0 3 0x14280 nfsidl nfsio 17429 158161 0 0 3 0x14280 nfsidl nfsio 99129 457642 0 0 3 0x14280 nfsidl nfsio 74100 133931 0 0 3 0x14280 nfsidl nfsio 60270 220913 0 0 3 0x14280 nfsidl nfsio 57578 511762 0 0 3 0x14280 nfsidl nfsio 30998 470163 0 0 3 0x14280 nfsidl nfsio 99740 517482 0 0 3 0x14280 nfsidl nfsio 41025 291215 0 0 3 0x14280 nfsidl nfsio 55284 27807 42522 0 3 0x82 nanoslp syz-executor 94257 84940 1 0 3 0x100083 ttyin getty 13396 258692 42522 0 3 0x82 nanoslp syz-executor 54765 143871 0 0 3 0x14200 bored sosplice 12632 313074 42522 0 3 0x82 nanoslp syz-executor 19580 321367 42522 0 2 0x2 syz-executor 9090 433640 42522 0 3 0x82 nanoslp syz-executor 42522 370098 87970 0 2 0x2 syz-executor 87970 187101 32903 0 3 0x10008a sigsusp ksh 32903 338295 47217 0 3 0x98 kqread sshd-session 47217 415664 62033 0 3 0x92 kqread sshd-session 62033 359178 1 0 3 0x88 kqread sshd 62015 11128 39900 74 3 0x1100092 bpf pflogd 39900 244332 1 0 3 0x80 sbwait pflogd 94400 292909 88010 73 3 0x1100090 kqread syslogd 88010 367414 1 0 3 0x100082 sbwait syslogd 9225 119332 1 0 3 0x100080 kqread resolvd 54806 500298 8983 77 3 0x100092 kqread dhcpleased 22448 28594 8983 77 3 0x100092 kqread dhcpleased 8983 448597 1 0 3 0x80 kqread dhcpleased 5560 496400 0 0 3 0x14200 bored smr 20503 15904 0 0 2 0x14200 zerothread 33526 509254 0 0 3 0x14200 aiodoned aiodoned 21355 312389 0 0 3 0x14200 syncer update 1183 59015 0 0 3 0x14200 cleaner cleaner 53467 61605 0 0 3 0x14200 reaper reaper 49040 67199 0 0 3 0x14200 pgdaemon pagedaemon 90629 372984 0 0 3 0x14200 bored viomb 81063 344253 0 0 3 0x40014200 acpi0 acpi0 98675 31918 0 0 3 0x40014200 idle1 44469 369754 0 0 3 0x14200 bored softnet3 29906 69467 0 0 3 0x14200 bored softnet2 9170 291399 0 0 3 0x14200 bored softnet1 4566 405596 0 0 3 0x14200 bored softnet0 18883 274189 0 0 3 0x14200 bored systqmp 12306 491213 0 0 3 0x14200 bored systq 88403 286670 0 0 3 0x14200 tmoslp softclockmp 18205 481110 0 0 3 0x40014200 tmoslp softclock 6537 442403 0 0 3 0x40014200 idle0 1 179451 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 13144 (syz-executor) thread 0xffff800031fe67d8 (189678) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83928508) #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 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 yield+0x6a sys/kern/sched_bsd.c:320 #4 malloc+0xe5 sys/kern/kern_malloc.c:174 #5 sys_semop+0x234 sys/kern/sysv_sem.c:564 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 Process 38695 (syz-executor) thread 0xffff8000ffff0540 (138039) exclusive rrwlock inode r = 0 (0xfffffd806e674770) #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+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3109 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806dd1f0c8) #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+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #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 domkdirat+0x8b sys/kern/vfs_syscalls.c:3094 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 Process 19580 (syz-executor) thread 0xffff80002a2a5208 (321367) exclusive rrwlock inode r = 0 (0xfffffd806dcd41c0) #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+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_getdents+0x264 sys/kern/vfs_syscalls.c:-1 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10212 11105K 11845K 166960K 12505 0 pcb 17 15K 19K 166960K 259 0 rtable 189 8K 9K 166960K 629 0 pf 36 17K 21K 166960K 151 0 ifaddr 39 6K 7K 166960K 123 0 ifgroup 59 2K 2K 166960K 195 0 sysctl 3 1K 9K 166960K 11 0 counters 70 37K 37K 166960K 190 0 ioctlops 0 0K 4K 166960K 1758 0 iov 0 0K 16K 166960K 56 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1499 94K 95K 166960K 2482 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 14 28K 28K 166960K 59 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 110K 166960K 1279 0 sigio 0 0K 0K 166960K 31 0 proc 72 91K 128K 166960K 803 0 subproc 72 4K 4K 166960K 131 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 144 0 in_multi 74 5K 7K 166960K 189 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 604 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 224 168K 182K 166960K 13153 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 40 80K 102K 166960K 2515 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 45 0 NDP 13 0K 1K 166960K 82 0 temp 66 8681K 8749K 166960K 49876 0 kqueue 13 20K 28K 166960K 201 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 120 104 0 101 1 0 1 1 0 8 0 rtentry 176 200 0 121 5 0 5 5 0 8 0 unpcb 144 796 0 777 5 4 1 4 0 8 0 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 808 429 0 425 15 8 7 8 0 8 6 arp 128 32 0 16 1 0 1 1 0 8 0 inpcb 384 1366 0 1358 22 14 8 13 0 8 6 nd6 144 44 0 25 1 0 1 1 0 8 0 pkpcb 40 45 0 45 3 2 1 1 0 8 1 kcovpl 48 14 0 6 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 2 0 1 0 8 0 ppxss 1192 38 0 38 1 0 1 1 0 8 1 pppxif 1504 8 0 8 4 3 1 1 0 8 1 pffrag 232 14 0 9 2 1 1 1 0 482 0 pffrnode 88 14 0 9 2 1 1 1 0 8 0 pffrent 40 33 0 28 2 1 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 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 89 0 29 1 0 1 1 0 8 0 pfstkey 128 89 0 29 2 0 2 2 0 8 0 pfstate 384 89 0 29 6 0 6 6 0 8 0 pfrule 1344 24 0 18 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 904 0 572 30 7 23 26 0 8 0 art_table 32 905 0 572 4 0 4 4 0 8 0 art_node 16 197 0 127 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 9 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 52 0 41 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 3575 0 2058 96 0 96 96 0 8 0 ffsino 288 3575 0 2058 110 1 109 109 0 8 0 nchpl 144 5269 0 3563 64 0 64 64 0 8 0 rtmask 32 2 0 2 2 1 1 1 0 8 1 uvmvnodes 80 4334 0 0 89 0 89 89 0 8 0 vnodes 216 4334 0 0 241 0 241 241 0 8 0 namei 1024 18484 0 18483 3 2 1 2 0 8 0 percpumem 16 110 0 60 1 0 1 1 0 8 0 kstatmem 264 114 0 82 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 3 0 3 3 3 0 1 0 8 0 scxspl 216 17682 0 17682 12 10 2 8 1 8 2 plimitpl 152 234 0 217 1 0 1 1 0 8 0 sigapl 424 1585 0 1516 10 1 9 9 0 8 0 knotepl 120 587 0 0 17 0 17 17 0 8 0 kqueuepl 224 398 0 388 4 3 1 3 0 8 0 pipepl 336 283 0 256 3 0 3 3 0 8 0 fdescpl 520 1542 0 1513 3 0 3 3 0 8 0 filepl 160 9590 0 9372 25 9 16 16 0 8 4 lockfpl 104 457 0 455 2 1 1 2 0 8 0 lockfspl 48 200 0 198 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 58 0 41 1 0 1 1 0 8 0 ucredpl 104 1293 0 1280 1 0 1 1 0 8 0 zombiepl 144 2151 0 2150 1 0 1 1 0 8 0 processpl 1208 1585 0 1516 6 0 6 6 0 8 0 procpl 656 3496 0 3419 8 0 8 8 0 8 0 srpgc 96 14 0 14 3 3 0 1 0 8 0 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 728 2364 0 2335 26 17 9 14 0 8 6 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 130 0 0 17 0 17 17 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 20 0 0 1 0 1 1 0 8 0 mbufpl 256 230 0 0 13 0 13 13 0 8 0 bufpl 280 5336 0 134 372 0 372 372 0 8 0 anonpl 32 10933 0 0 88 0 88 88 0 246 0 amapchunkpl 152 43329 0 42888 40 13 27 28 0 158 4 amappl16 200 3804 0 3770 39 24 15 24 0 8 7 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 127 0 115 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 2278 0 2249 3 1 2 2 0 8 0 amappl11 160 122 0 107 1 0 1 1 0 8 0 amappl10 152 9 0 8 1 0 1 1 0 8 0 amappl9 144 244 0 244 1 1 0 1 0 8 0 amappl8 136 95 0 92 1 0 1 1 0 8 0 amappl7 128 130 0 118 1 0 1 1 0 8 0 amappl6 120 241 0 237 1 0 1 1 0 8 0 amappl5 112 159 0 149 1 0 1 1 0 8 0 amappl4 104 341 0 320 1 0 1 1 0 8 0 amappl3 96 8724 0 8625 4 0 4 4 0 8 0 amappl2 88 736 0 674 2 0 2 2 0 8 0 amappl1 80 13388 0 12792 16 2 14 15 0 8 0 amappl 88 12143 0 11993 5 0 5 5 0 92 0 dma16384 16384 2 0 2 2 1 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 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 73 0 73 3 3 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1542 0 1513 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1542 0 1513 1 0 1 1 0 8 0 vmmpekpl 168 13345 0 13282 4 0 4 4 0 8 0 vmmpepl 168 100465 0 98579 114 8 106 109 0 357 8 vmsppl 480 1541 0 1513 6 1 5 5 0 8 0 rwobjpl 72 31304 0 26042 98 0 98 98 0 8 0 pdppl 4096 3091 0 3026 117 44 73 85 0 8 8 pvpl 32 19840 0 0 160 0 160 160 0 265 0 pmappl 256 1541 0 1513 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 427 0 69 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff800031fe67d8,ffff800038bfa7d0,ffff800038bfa720) at sys_semop+0x3ae sys/kern/sysv_sem.c:620 syscall(ffff800038bfa7d0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800038bfa7d0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd8bd9c38860, count: -3 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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(ffffffff83928300) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83928300) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003a415fe0) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a415fe0) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78ddc9807b70, count: -6