login: kernel: protection fault trap, code=0 Stopped at sys_semop+0x45b: 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(ffff8000ffff16f0,ffff8000371ec250,ffff8000371ec1a0) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff8000371ec250) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371ec250) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3d422b28510, count: -3 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000371ec170 rbx 0 rdx 0xffff8000012ab1c0 rcx 0xffff8000ffff16f0 rax 0xdeadbeefdeadc393 r8 0x7f7fffffc000 r9 0 r10 0x1aa6d104aa80ac62 r11 0xff65a7abf2791cbc r12 0xffff800001353704 r13 0 r14 0xffff8000371ec250 r15 0 rip 0xffffffff82b9f1cb sys_semop+0x45b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000371ec050 ss 0x10 sys_semop+0x45b: movzwl 0(%rax),%r15d ddb{0}> show proc PROC (syz-executor) tid=145376 pid=51016 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=84, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff0cd0,0xffff80002a0d1710 process=0xffff800037465b38 user=0xffff8000371e7000, vmspace=0xfffffd806bcfc3a8 estcpu=34, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 70861 289160 38915 0 2 0 syz-executor 70861 393132 38915 0 3 0x4000080 fsleep syz-executor 61940 273659 8331 0 2 0 syz-executor 10414 302942 27267 0 2 0 syz-executor 10414 252133 27267 0 3 0x4000080 fsleep syz-executor 98253 475743 91013 0 2 0 syz-executor 98253 350633 91013 0 3 0x4000080 fsleep syz-executor 17995 194511 50522 0 2 0 syz-executor 17995 140772 50522 0 3 0x4000080 fsleep syz-executor 61643 208644 98048 0 2 0 syz-executor 61643 458670 98048 0 3 0x4000080 fsleep syz-executor 61643 329087 98048 0 3 0x4000080 fsleep syz-executor 32834 135889 86579 0 2 0 syz-executor 32834 348166 86579 0 2 0x4000000 syz-executor 32834 401479 86579 0 2 0x4000000 syz-executor 51016 46689 43728 0 2 0 syz-executor *51016 145376 43728 0 7 0x4000000 syz-executor 51016 170364 43728 0 2 0x4000000 syz-executor 50522 372122 95085 0 3 0x82 nanoslp syz-executor 69785 194445 1 0 3 0x100083 ttyin getty 90058 496461 0 0 3 0x14280 nfsidl nfsio 48308 91610 0 0 3 0x14280 nfsidl nfsio 49983 89433 0 0 3 0x14280 nfsidl nfsio 65614 122855 0 0 3 0x14280 nfsidl nfsio 75456 145098 0 0 3 0x14280 nfsidl nfsio 81377 419500 0 0 3 0x14280 nfsidl nfsio 24328 331619 0 0 3 0x14280 nfsidl nfsio 81585 98715 0 0 3 0x14280 nfsidl nfsio 15725 483443 0 0 3 0x14280 nfsidl nfsio 52568 510711 0 0 3 0x14280 nfsidl nfsio 76846 21672 0 0 3 0x14280 nfsidl nfsio 70263 223726 0 0 3 0x14280 nfsidl nfsio 74323 178906 0 0 3 0x14280 nfsidl nfsio 87286 90942 0 0 3 0x14280 nfsidl nfsio 85677 523242 0 0 3 0x14280 nfsidl nfsio 41941 266040 0 0 3 0x14280 nfsidl nfsio 45686 357646 0 0 3 0x14280 nfsidl nfsio 90089 386019 0 0 3 0x14280 nfsidl nfsio 80826 26951 0 0 3 0x14280 nfsidl nfsio 31555 306519 0 0 3 0x14280 nfsidl nfsio 91013 439826 95085 0 3 0x82 nanoslp syz-executor 2929 138031 0 0 3 0x14200 bored sosplice 86579 295944 95085 0 3 0x82 nanoslp syz-executor 98048 361655 95085 0 3 0x82 nanoslp syz-executor 38915 283564 95085 0 3 0x82 nanoslp syz-executor 43728 387923 95085 0 3 0x82 nanoslp syz-executor 8331 183815 95085 0 3 0x82 nanoslp syz-executor 27267 87956 95085 0 3 0x82 nanoslp syz-executor 95085 221484 92233 0 3 0x82 kqread syz-executor 92233 351106 74396 0 3 0x10008a sigsusp ksh 74396 361047 23044 0 3 0x98 kqread sshd-session 23044 280488 66291 0 3 0x92 kqread sshd-session 66291 37261 1 0 3 0x88 kqread sshd 97514 192765 53870 74 3 0x1100092 bpf pflogd 53870 185309 1 0 3 0x80 sbwait pflogd 71154 446022 61453 73 3 0x1100090 kqread syslogd 61453 197227 1 0 3 0x100082 sbwait syslogd 25433 233418 1 0 3 0x100080 kqread resolvd 59675 471693 30801 77 3 0x100092 kqread dhcpleased 42595 522818 30801 77 3 0x100092 kqread dhcpleased 30801 89515 1 0 3 0x80 kqread dhcpleased 55733 122393 0 0 3 0x14200 bored smr 79290 30653 0 0 2 0x14200 zerothread 26988 3579 0 0 3 0x14200 aiodoned aiodoned 20586 236054 0 0 3 0x14200 syncer update 39691 365396 0 0 3 0x14200 cleaner cleaner 39275 477420 0 0 3 0x14200 reaper reaper 38951 484826 0 0 3 0x14200 pgdaemon pagedaemon 93907 381481 0 0 3 0x14200 bored viomb 54373 413165 0 0 3 0x40014200 acpi0 acpi0 21355 479215 0 0 7 0x40014200 idle1 72060 459872 0 0 3 0x14200 bored softnet3 23763 161400 0 0 3 0x14200 bored softnet2 29331 338292 0 0 3 0x14200 bored softnet1 7453 459357 0 0 3 0x14200 bored softnet0 33929 111724 0 0 3 0x14200 bored systqmp 81467 157373 0 0 3 0x14200 bored systq 19535 102845 0 0 3 0x14200 tmoslp softclockmp 6653 147122 0 0 3 0x40014200 tmoslp softclock 80312 324879 0 0 3 0x40014200 idle0 1 143814 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 61940 (syz-executor) thread 0xffff80002a0d1988 (273659) exclusive rrwlock inode r = 0 (0xfffffd8071a814d8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:678 #6 ufs_ihashget+0x192 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x16bc sys/ufs/ufs/ufs_lookup.c:573 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 sys_chdir+0x88 change_dir sys/kern/vfs_syscalls.c:839 [inline] #12 sys_chdir+0x88 sys/kern/vfs_syscalls.c:785 #13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 Process 32834 (syz-executor) thread 0xffff80002a0d1c10 (348166) exclusive rwlock fdlock r = 0 (0xfffffd8071ad5c08) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 doopenat+0x173 #2 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #2 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 Process 32834 (syz-executor) thread 0xffff8000ffff1468 (401479) exclusive rwlock vmmaplk r = 0 (0xfffffd806cb3df10) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5255 #2 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1813 #3 uvm_fault_check+0x831 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #3 uvm_fault_check+0x831 sys/uvm/uvm_fault.c:712 #4 uvm_fault+0xf5 sys/uvm/uvm_fault.c:600 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 Process 51016 (syz-executor) thread 0xffff8000ffff16f0 (145376) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff835780f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #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:170 #5 sys_semop+0x234 sys/kern/sysv_sem.c:564 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 51016 (syz-executor) thread 0xffff80002a0d1700 (170364) exclusive rwlock futex r = 0 (0xffffffff834b4580) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 sys_futex+0x69 sys/kern/sys_futex.c:98 #2 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #2 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10233 11202K 11707K 166960K 13085 0 pcb 17 16K 18K 166960K 279 0 rtable 235 8K 9K 166960K 719 0 pf 35 17K 19K 166960K 111 0 ifaddr 43 7K 8K 166960K 89 0 ifgroup 55 2K 2K 166960K 138 0 sysctl 2 0K 0K 166960K 2 0 counters 64 36K 36K 166960K 114 0 ioctlops 0 0K 4K 166960K 1739 0 iov 0 0K 12K 166960K 327 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1419 89K 90K 166960K 2431 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 18 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 49 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 89K 166960K 1296 0 sigio 0 0K 0K 166960K 20 0 proc 75 103K 140K 166960K 704 0 subproc 104 6K 6K 166960K 130 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 191 0 in_multi 93 6K 7K 166960K 187 0 ether_multi 1 0K 0K 166960K 12 0 mrt 1 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 540 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 240 73K 87K 166960K 13724 0 UVM aobj 65 3K 3K 166960K 69 0 pinsyscall 43 86K 104K 166960K 2459 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 74 0 NDP 13 0K 2K 166960K 63 0 temp 76 6828K 7074K 166960K 48220 0 kqueue 13 20K 30K 166960K 225 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 171 0 167 3 0 3 3 0 8 2 rtentry 112 161 0 55 4 0 4 4 0 8 0 unpcb 144 890 0 867 10 5 5 6 0 8 4 syncache 336 9 0 9 1 1 0 1 0 8 0 tcpqe 32 3 0 3 1 1 0 1 0 8 0 tcpcb 808 667 0 654 14 12 2 8 0 8 0 arp 120 27 0 11 1 0 1 1 0 8 0 inpcb 336 1926 0 1908 22 15 7 12 0 8 5 nd6 136 37 0 12 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 2 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1168 14 0 14 3 3 0 1 0 8 0 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 8 0 2 1 0 1 1 0 482 0 pffrnode 88 8 0 2 1 0 1 1 0 8 0 pffrent 40 18 0 11 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 pfstitem 24 21 0 13 1 0 1 1 0 8 0 pfstkey 128 21 0 13 1 0 1 1 0 8 0 pfstate 376 20 0 13 2 0 2 2 0 8 0 pfrule 1344 22 0 15 2 0 2 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 599 0 179 31 4 27 31 0 8 0 art_table 32 602 0 179 4 0 4 4 0 8 0 art_node 16 158 0 66 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 10 1 0 1 1 0 8 0 semapl 112 45 0 36 1 0 1 1 0 8 0 shmpl 112 66 0 4 2 0 2 2 0 8 0 dirhash 1024 32 0 15 3 0 3 3 0 8 0 dino2pl 256 3828 0 2327 95 0 95 95 0 8 0 ffsino 272 3828 0 2327 101 0 101 101 0 8 0 nchpl 144 5653 0 3959 64 0 64 64 0 8 0 uvmvnodes 80 3708 0 0 76 0 76 76 0 8 0 vnodes 216 3708 0 0 206 0 206 206 0 8 0 namei 1024 19950 0 19949 3 2 1 2 0 8 0 percpumem 16 71 0 25 1 0 1 1 0 8 0 kstatmem 264 74 0 50 2 0 2 2 0 8 0 scsiplug 72 5 0 5 2 2 0 1 0 8 0 scxspl 216 16675 0 16675 13 12 1 8 1 8 1 plimitpl 152 259 0 242 1 0 1 1 0 8 0 sigapl 424 1624 0 1553 10 1 9 9 0 8 0 futexpl 64 19165 0 19158 1 0 1 1 0 8 0 knotepl 120 638 0 0 19 0 19 19 0 8 0 kqueuepl 216 371 0 362 3 2 1 3 0 8 0 pipepl 320 364 0 337 14 6 8 8 0 8 5 fdescpl 496 1581 0 1549 5 0 5 5 0 8 0 filepl 152 11366 0 11109 29 10 19 19 0 8 7 lockfpl 104 1000 0 998 2 1 1 2 0 8 0 lockfspl 48 183 0 181 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 57 0 39 1 0 1 1 0 8 0 ucredpl 104 2337 0 2323 1 0 1 1 0 8 0 zombiepl 144 1725 0 1725 2 1 1 1 0 8 1 processpl 1160 1624 0 1553 7 1 6 6 0 8 0 procpl 648 3462 0 3381 8 0 8 8 0 8 0 srpgc 96 18 0 18 2 2 0 1 0 8 0 sosppl 168 6 0 6 3 3 0 1 0 8 0 sockpl 664 3006 0 2961 32 21 11 15 0 8 6 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 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 144 0 0 18 0 18 18 0 8 0 mcl2k 2048 26 0 0 4 0 4 4 0 8 0 mtagpl 96 24 0 0 1 0 1 1 0 8 0 mbufpl 256 1210 0 0 76 0 76 76 0 8 0 bufpl 280 5616 0 107 394 0 394 394 0 8 0 anonpl 24 236435 0 232343 65 29 36 48 0 185 2 amapchunkpl 152 44505 0 43981 43 14 29 29 0 158 5 amappl16 200 4945 0 4911 36 30 6 15 0 8 3 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 155 0 143 1 0 1 1 0 8 0 amappl13 176 47 0 47 1 1 0 1 0 8 0 amappl12 168 2264 0 2233 3 1 2 2 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 15 0 14 2 1 1 1 0 8 0 amappl9 144 209 0 209 1 1 0 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 127 0 114 1 0 1 1 0 8 0 amappl6 120 183 0 182 1 0 1 1 0 8 0 amappl5 112 146 0 134 1 0 1 1 0 8 0 amappl4 104 343 0 324 1 0 1 1 0 8 0 amappl3 96 8053 0 7955 3 0 3 3 0 8 0 amappl2 88 1910 0 1825 3 0 3 3 0 8 0 amappl1 80 12650 0 12087 16 2 14 16 0 8 0 amappl 88 13171 0 12993 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma8192 8192 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 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 3 3 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 68 0 4 2 0 2 2 0 8 0 uaddrrnd 24 1581 0 1549 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1581 0 1549 1 0 1 1 0 8 0 vmmpekpl 168 14501 0 14448 3 0 3 3 0 8 0 vmmpepl 168 102378 0 100461 115 28 87 104 0 357 1 vmsppl 448 1580 0 1549 6 2 4 5 0 8 0 rwobjpl 56 32446 0 27732 71 3 68 70 0 8 0 pdppl 4096 3169 0 3098 109 38 71 83 0 8 0 pvpl 32 14535 0 0 118 1 117 117 0 265 0 pmappl 248 1580 0 1549 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 497 0 81 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff8000ffff16f0,ffff8000371ec250,ffff8000371ec1a0) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff8000371ec250) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371ec250) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3d422b28510, count: -3 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029b7bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -5