kernel: protection fault trap, code=0 Stopped at sys_semop+0x3d5: movzwl 0(%rax),%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(ffff800033012030,ffff80002a31d3f0,ffff80002a31d340) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80002a31d3f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a31d3f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2fd13938000, count: -3 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a31d310 rbx 0xdeadbeefdeadbeef rdx 0 rcx 0xffff800033012030 rax 0xdeadbeefdeadbeef r8 0x7f7fffffc000 r9 0 r10 0x36a032a4be74f43b r11 0xba2e66e28bdce5be r12 0 r13 0xfffffd805f1d8000 r14 0xffff80002a31d3f0 r15 0 rip 0xffffffff81b41db5 sys_semop+0x3d5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a31d220 ss 0x10 sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{0}> show proc PROC (syz-executor) tid=75988 pid=1444 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=81, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000330134f0,0xffff800033013268 process=0xffff80003341c020 user=0xffff80002a318000, vmspace=0xfffffd800b0fb010 estcpu=31, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 9827 375721 26578 0 2 0 syz-executor 9827 321566 26578 0 3 0x4000080 fsleep syz-executor 9827 6254 26578 0 3 0x4000080 fsleep syz-executor 9827 138982 26578 0 2 0x4000000 syz-executor 65761 508930 88576 0 2 0 syz-executor 65761 276702 88576 0 2 0x4000000 syz-executor 65761 251568 88576 0 3 0x4000080 fsleep syz-executor 1444 423546 34378 60929 2 0x10 syz-executor * 1444 75988 34378 60929 7 0x4000010 syz-executor 1444 112905 34378 60929 3 0x4000090 fsleep syz-executor 66216 309949 22749 0 2 0x2 syz-executor 34378 412935 22749 0 3 0x82 nanoslp syz-executor 87618 402770 0 0 3 0x14200 acct acct 60747 129188 22749 0 3 0x82 nanoslp syz-executor 62002 102603 22749 0 3 0x82 piperd syz-executor 26578 282846 22749 0 2 0x3 syz-executor 64693 387709 1 0 3 0x100083 ttyopn getty 20095 398148 22749 0 2 0x3 syz-executor 14130 393333 0 0 3 0x14200 bored sosplice 88576 164377 22749 0 2 0x3 syz-executor 79573 338290 22749 0 7 0x2 syz-executor 22749 272880 63480 0 2 0x3 syz-executor 63480 354529 72155 0 3 0x10008a sigsusp ksh 72155 21999 26512 0 3 0x98 kqread sshd-session 26512 300622 17384 0 3 0x92 kqread sshd-session 17384 140722 1 0 3 0x88 kqread sshd 13701 227878 29144 74 3 0x1100092 bpf pflogd 29144 246002 1 0 3 0x80 sbwait pflogd 22427 149416 74726 73 3 0x1100090 kqread syslogd 74726 94222 1 0 3 0x100082 sbwait syslogd 86440 153980 1 0 3 0x100080 kqread resolvd 80334 125556 50840 77 3 0x100092 kqread dhcpleased 61048 139703 50840 77 3 0x100092 kqread dhcpleased 50840 103136 1 0 3 0x80 kqread dhcpleased 76418 447575 0 0 3 0x14200 bored smr 59116 319312 0 0 2 0x14200 zerothread 85015 442157 0 0 3 0x14200 aiodoned aiodoned 38120 405443 0 0 3 0x14200 syncer update 19718 255666 0 0 3 0x14200 cleaner cleaner 65546 280904 0 0 3 0x14200 reaper reaper 20510 399192 0 0 3 0x14200 pgdaemon pagedaemon 23991 435996 0 0 3 0x14200 bored viomb 67391 54496 0 0 3 0x40014200 acpi0 acpi0 4731 151339 0 0 3 0x40014200 idle1 63283 180401 0 0 3 0x14200 bored softnet7 55003 490565 0 0 3 0x14200 bored softnet6 73638 150858 0 0 3 0x14200 bored softnet5 67870 413348 0 0 3 0x14200 bored softnet4 29953 345476 0 0 3 0x14200 bored softnet3 68691 262942 0 0 3 0x14200 bored softnet2 90288 174838 0 0 3 0x14200 bored softnet1 94794 203196 0 0 3 0x14200 bored softnet0 53461 382106 0 0 3 0x14200 smrbar systqmp 21874 147092 0 0 3 0x14200 bored systq 53456 225927 0 0 3 0x14200 tmoslp softclockmp 13811 205583 0 0 3 0x40014200 tmoslp softclock 67156 131459 0 0 3 0x40014200 idle0 1 149826 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 65761 (syz-executor) thread 0xffff8000330134f0 (276702) exclusive rwlock fdlock r = 0 (0xffff800033010070) #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 doopenat+0x18e sys/kern/vfs_syscalls.c:1105 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #4 Xsyscall+0x128 Process 1444 (syz-executor) thread 0xffff800033012030 (75988) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83871998) #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 66216 (syz-executor) thread 0xffff800031008020 (309949) exclusive rwlock vmmaplk r = 0 (0xfffffd806b8dfaa8) #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:5168 #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:748 #6 Xsyscall+0x128 Process 79573 (syz-executor) thread 0xffff8000ffff3c98 (338290) exclusive rrwlock inode r = 0 (0xfffffd807912cb80) #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 vget+0x2a2 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+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806be991f8) #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 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #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 53461 (systqmp) thread 0xffff8000ffffe000 (382106) shared rwlock systqmp r = 0 (0xffffffff83785018) #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 10230 11040K 12351K 166960K 14024 0 pcb 17 19K 26K 166960K 957 0 rtable 222 11K 12K 166960K 1207 0 pf 38 18K 25K 166960K 373 0 ifaddr 37 8K 9K 166960K 284 0 ifgroup 51 2K 2K 166960K 443 0 sysctl 4 1K 9K 166960K 37 0 counters 66 36K 37K 166960K 702 0 ioctlops 0 0K 8K 166960K 2253 0 iov 0 0K 40K 166960K 183 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1572 99K 99K 166960K 3904 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 19 40K 40K 166960K 113 0 dirhash 12 2K 2K 166960K 57 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 14 49K 236K 166960K 3128 0 sigio 1 0K 0K 166960K 51 0 proc 72 115K 164K 166960K 1556 0 subproc 72 4K 4K 166960K 306 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 266 0 in_multi 78 5K 7K 166960K 498 0 ether_multi 1 0K 0K 166960K 17 0 mrt 1 0K 0K 166960K 16 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 1355 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 13 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 220 159K 178K 166960K 28857 0 UVM aobj 131 4K 4K 166960K 135 0 pinsyscall 39 78K 101K 166960K 4892 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 208 0 NDP 11 0K 2K 166960K 204 0 temp 83 8652K 8908K 166960K 167444 0 kqueue 14 22K 29K 166960K 614 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 120 389 0 385 5 4 1 3 0 8 0 rtentry 176 426 0 342 5 0 5 5 0 8 0 unpcb 144 2663 0 2646 16 15 1 6 0 8 0 syncache 336 23 0 23 8 8 0 1 0 8 0 tcpqe 32 9 0 9 6 6 0 1 0 8 0 tcpcb 736 1252 0 1246 36 35 1 13 0 8 0 arp 128 51 0 38 1 0 1 1 0 8 0 inpcb 328 3944 0 3931 57 52 5 18 0 8 3 nd6 144 93 0 74 1 0 1 1 0 8 0 pkpcb 40 101 0 101 7 6 1 1 0 8 1 kcovpl 48 34 0 26 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 260 0 260 6 5 1 1 0 8 1 pppxif 1504 151 0 151 8 8 0 1 0 8 0 pfstscr 40 9 0 9 2 2 0 1 0 8 0 pffrag 232 16 0 14 1 0 1 1 0 482 0 pffrnode 88 15 0 13 1 0 1 1 0 8 0 pffrent 40 86 0 84 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 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 5 0 3 2 1 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 254 0 191 1 0 1 1 0 8 0 pfstkey 128 267 0 205 4 1 3 4 0 8 0 pfstate 384 261 0 199 11 2 9 11 0 8 0 pfrule 1344 29 0 24 2 1 1 2 0 8 0 rttmr 136 3 0 3 2 2 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 2015 0 1607 46 16 30 30 0 8 0 art_table 40 2019 0 1607 5 0 5 5 0 8 0 art_node 32 422 0 350 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 103 0 87 1 0 1 1 0 8 0 shmpl 112 132 0 4 4 0 4 4 0 8 0 dirhash 1024 47 0 30 3 0 3 3 0 8 0 dino2pl 256 6891 0 5334 99 1 98 98 0 8 0 ffsino 296 6891 0 5334 121 1 120 120 0 8 0 nchpl 144 10899 0 9138 66 0 66 66 0 8 0 rtmask 32 26 0 26 6 5 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 39468 0 39468 3 2 1 2 0 8 1 percpumem 16 366 0 318 1 0 1 1 0 8 0 kstatmem 264 274 0 250 5 3 2 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 12 0 12 7 7 0 1 0 8 0 scxspl 216 61577 0 61577 17 16 1 8 1 8 1 plimitpl 152 712 0 695 1 0 1 1 0 8 0 sigapl 424 3392 0 3340 9 2 7 9 0 8 0 knotepl 120 574 0 0 17 0 17 17 0 8 0 kqueuepl 224 1338 0 1328 15 13 2 5 0 8 1 pipepl 344 595 0 568 14 10 4 9 0 8 0 fdescpl 528 3343 0 3315 3 0 3 3 0 8 0 filepl 160 23979 0 23766 37 23 14 18 0 8 0 lockfpl 104 1247 0 1245 3 2 1 2 0 8 0 lockfspl 48 502 0 500 1 0 1 1 0 8 0 sessionpl 144 60 0 51 1 0 1 1 0 8 0 pgrppl 48 163 0 146 1 0 1 1 0 8 0 ucredpl 104 3883 0 3869 1 0 1 1 0 8 0 zombiepl 144 4251 0 4249 2 1 1 1 0 8 0 processpl 1248 3392 0 3340 6 1 5 6 0 8 0 procpl 664 8136 0 8076 8 1 7 8 0 8 0 sosppl 168 21 0 21 8 7 1 1 0 8 1 sockpl 752 7213 0 7179 110 102 8 24 0 8 3 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 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 134 0 0 17 0 17 17 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 95 0 0 10 3 7 9 0 8 0 mtagpl 96 13 0 0 1 0 1 1 0 8 0 mbufpl 256 1994 0 0 122 0 122 122 0 8 0 bufpl 280 24802 0 18659 440 0 440 440 0 8 0 anonpl 32 12559 0 0 102 0 102 102 0 246 0 amapchunkpl 152 97991 0 97500 69 41 28 32 0 158 3 amappl16 200 9840 0 9807 88 73 15 22 0 8 8 amappl15 192 5 0 5 2 2 0 1 0 8 0 amappl14 184 185 0 173 1 0 1 1 0 8 0 amappl13 176 6 0 6 2 2 0 1 0 8 0 amappl12 168 4398 0 4370 3 1 2 2 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 10 0 10 1 1 0 1 0 8 0 amappl9 144 274 0 274 1 1 0 1 0 8 0 amappl8 136 25 0 21 1 0 1 1 0 8 0 amappl7 128 171 0 159 1 0 1 1 0 8 0 amappl6 120 441 0 437 1 0 1 1 0 8 0 amappl5 112 233 0 223 1 0 1 1 0 8 0 amappl4 104 374 0 352 1 0 1 1 0 8 0 amappl3 96 20200 0 20104 5 1 4 4 0 8 0 amappl2 88 1082 0 1014 2 0 2 2 0 8 0 amappl1 80 24325 0 23734 15 0 15 15 0 8 0 amappl 88 27256 0 27108 6 1 5 5 0 92 0 dma16384 16384 2 0 2 2 2 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 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 256 0 256 4 4 0 1 0 8 0 dma64 64 9 0 9 4 4 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 72 134 0 4 3 0 3 3 0 8 0 uaddrrnd 24 3343 0 3315 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3343 0 3315 1 0 1 1 0 8 0 vmmpekpl 168 27758 0 27697 3 0 3 3 0 8 0 vmmpepl 168 216661 0 214761 136 36 100 111 0 357 0 vmsppl 488 3342 0 3315 5 0 5 5 0 8 0 rwobjpl 80 61990 0 55007 149 2 147 149 0 8 0 pdppl 4096 6694 0 6630 188 116 72 82 0 8 8 pvpl 32 23911 0 0 194 1 193 193 0 265 0 pmappl 256 3342 0 3315 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 548 0 186 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff800033012030,ffff80002a31d3f0,ffff80002a31d340) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80002a31d3f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a31d3f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2fd13938000, 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(ffffffff83871790) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83871790) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff83871790,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 biowait(fffffd806cdbfe38) at biowait+0xc6 sys/kern/vfs_bio.c:1242 bwrite(fffffd806cdbfe38) at bwrite+0x2e7 sys/kern/vfs_bio.c:754 ufs_dirremove(fffffd806c833980,fffffd807912cae0,800c,1) at ufs_dirremove+0x290 sys/ufs/ufs/ufs_lookup.c:919 ufs_rmdir(ffff80002a37dc50) at ufs_rmdir+0x238 sys/ufs/ufs/ufs_vnops.c:1248 VOP_RMDIR(fffffd806c833980,fffffd800e1209a0,ffff80002a37dd28) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413 dounlinkat(ffff8000ffff3c98,ffffff9c,74fc06c48d60,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1901 syscall(ffff80002a37dea0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a37dea0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74fc06c48d50, count: -14