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(ffff8000ffff0cf8,ffff80002ebd2120,ffff80002ebd2070) at sys_semop+0x3ae sys/kern/sysv_sem.c:620 syscall(ffff80002ebd2120) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ebd2120) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xecd7141aa90, count: -3 ddb{0}> show registers rdi 0 rsi 0x4502 __ALIGN_SIZE+0x3502 rbp 0xffff80002ebd2040 rbx 0 rdx 0 rcx 0x66f6 __ALIGN_SIZE+0x56f6 rax 0xdead4110dead4110 r8 0x7f7fffffc000 r9 0 r10 0x5baca2e8c58a99c0 r11 0xdf133c4eaf255f53 r12 0xffff80000142e204 r13 0x4502 __ALIGN_SIZE+0x3502 r14 0xffff80002ebd2120 r15 0x4502 __ALIGN_SIZE+0x3502 rip 0xffffffff824fe30e sys_semop+0x3ae cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002ebd1f20 ss 0x10 sys_semop+0x3ae: movzwl 0x8(%rax,%rcx,4),%r15d ddb{0}> show proc PROC (syz-executor) tid=480173 pid=26023 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c446f90,0xffff8000ffff14b8 process=0xffff80003c411c70 user=0xffff80002ebcd000, vmspace=0xfffffd805da68b68 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 62829 365936 55691 0 2 0 syz-executor 68878 276577 98132 0 2 0 syz-executor 68878 64465 98132 0 3 0x4000080 bell syz-executor 32456 297017 18238 0 7 0 syz-executor 32456 807 18238 0 2 0x4000000 syz-executor 97748 186149 18494 0 3 0 vmmaplk syz-executor 97748 438546 18494 0 2 0x4000000 syz-executor 97748 107362 18494 0 2 0x4000000 syz-executor 26023 416762 42389 0 2 0 syz-executor *26023 480173 42389 0 7 0x4000000 syz-executor 26023 152808 42389 0 3 0x4000080 fsleep syz-executor 30256 167636 85532 0 3 0x80 nanoslp syz-executor 30256 258054 85532 0 3 0x4000080 msgwait syz-executor 30256 9649 85532 0 3 0x4000080 fsleep syz-executor 30256 392098 85532 0 3 0x4000080 fsleep syz-executor 20442 462271 33149 0 3 0x80 nanoslp syz-executor 20442 179761 33149 0 3 0x4000080 kqsel syz-executor 20442 390207 33149 0 3 0x4000080 kqread syz-executor 20442 426257 33149 0 3 0x4000080 kqread syz-executor 55691 255537 34871 0 3 0x82 nanoslp syz-executor 42389 248706 34871 0 3 0x82 nanoslp syz-executor 49272 84164 0 0 3 0x14200 bored sosplice 18494 172066 34871 0 3 0x82 nanoslp syz-executor 18238 244640 34871 0 3 0x82 nanoslp syz-executor 19504 129648 34871 0 2 0x3 syz-executor 85532 368606 34871 0 3 0x82 nanoslp syz-executor 98132 189060 34871 0 3 0x82 nanoslp syz-executor 33149 23117 34871 0 3 0x82 nanoslp syz-executor 34871 486909 4843 0 3 0x82 kqread syz-executor 4843 317969 83068 0 3 0x10008a sigsusp ksh 83068 77512 11393 0 3 0x98 kqread sshd-session 11393 395697 68148 0 3 0x92 kqread sshd-session 66751 378951 1 0 3 0x100083 ttyin getty 68148 187993 1 0 3 0x88 kqread sshd 2414 403936 50118 74 3 0x1100092 bpf pflogd 50118 159115 1 0 3 0x80 sbwait pflogd 69790 24722 5988 73 3 0x1100090 kqread syslogd 5988 389438 1 0 3 0x100082 sbwait syslogd 98562 140444 1 0 3 0x100080 kqread resolvd 71525 469830 29984 77 3 0x100092 kqread dhcpleased 72990 490317 29984 77 3 0x100092 kqread dhcpleased 29984 442858 1 0 3 0x80 kqread dhcpleased 22205 445147 0 0 3 0x14200 bored smr 6866 431574 0 0 2 0x14200 zerothread 19009 344563 0 0 3 0x14200 aiodoned aiodoned 10378 234952 0 0 3 0x14200 syncer update 54222 48500 0 0 3 0x14200 cleaner cleaner 95180 486859 0 0 3 0x14200 reaper reaper 69453 121540 0 0 3 0x14200 pgdaemon pagedaemon 49516 490566 0 0 3 0x14200 bored viomb 65142 493085 0 0 3 0x40014200 acpi0 acpi0 26523 103819 0 0 3 0x40014200 idle1 66148 131440 0 0 3 0x14200 bored softnet3 6116 281313 0 0 3 0x14200 bored softnet2 33247 162676 0 0 3 0x14200 bored softnet1 38129 212738 0 0 3 0x14200 bored softnet0 23957 345985 0 0 3 0x14200 bored systqmp 27634 397654 0 0 3 0x14200 bored systq 93960 388680 0 0 3 0x14200 tmoslp softclockmp 49683 42442 0 0 3 0x40014200 tmoslp softclock 45909 265726 0 0 3 0x40014200 idle0 1 16492 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 32456 (syz-executor) thread 0xffff80003c4479d0 (807) exclusive rrwlock inode r = 0 (0xfffffd806dddb538) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #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_makeinode+0xcb sys/ufs/ufs/ufs_vnops.c:1732 #8 ufs_mknod+0x5b sys/ufs/ufs/ufs_vnops.c:167 #9 VOP_MKNOD+0x102 sys/kern/vfs_vops.c:121 #10 domknodat+0x47e sys/kern/vfs_syscalls.c:1636 #11 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806a3bf0a0) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #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 domknodat+0xb4 sys/kern/vfs_syscalls.c:1588 #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 97748 (syz-executor) thread 0xffff8000ffff02b8 (438546) exclusive rwlock vmmaplk r = 0 (0xfffffd805da684e8) #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+0x3ea sys/kern/kern_rwlock.c:316 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5250 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1918 #4 uvm_fault_check+0x8a5 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] #4 uvm_fault_check+0x8a5 sys/uvm/uvm_fault.c:784 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 26023 (syz-executor) thread 0xffff8000ffff0cf8 (480173) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838c3658) #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10207 11093K 12620K 166960K 11983 0 pcb 17 14K 16K 166960K 160 0 rtable 197 6K 7K 166960K 455 0 pf 33 17K 81K 166960K 60 0 ifaddr 38 6K 7K 166960K 60 0 ifgroup 51 2K 2K 166960K 77 0 sysctl 4 1K 9K 166960K 11 0 counters 64 36K 37K 166960K 80 0 ioctlops 0 0K 4K 166960K 1516 0 iov 0 0K 20K 166960K 23 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1427 90K 91K 166960K 1802 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 23 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 498 0 sigio 0 0K 0K 166960K 7 0 proc 72 91K 128K 166960K 626 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 25 0 in_multi 85 6K 7K 166960K 130 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 469 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 259 161K 179K 166960K 6325 0 UVM aobj 14 2K 2K 166960K 15 0 pinsyscall 43 86K 104K 166960K 1673 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 9 0 NDP 11 0K 2K 166960K 37 0 temp 47 8664K 8733K 166960K 24564 0 kqueue 15 24K 26K 166960K 74 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 71 0 66 1 0 1 1 0 8 0 rtentry 176 138 0 49 6 0 6 6 0 8 0 unpcb 144 330 0 313 7 1 6 6 0 8 5 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 808 91 0 87 2 1 1 2 0 8 0 arp 128 23 0 6 1 0 1 1 0 8 0 inpcb 384 588 0 581 16 7 9 9 0 8 8 nd6 144 31 0 10 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 0 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 2 0 2 1 0 1 1 0 8 1 pppxif 1504 2 0 2 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 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 39 0 0 1 0 1 1 0 8 0 pfstkey 128 40 0 1 2 0 2 2 0 8 0 pfstate 384 40 0 1 4 0 4 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 551 0 181 29 3 26 29 0 8 1 art_table 32 552 0 181 4 0 4 4 0 8 0 art_node 16 135 0 56 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semapl 112 18 0 9 1 0 1 1 0 8 0 shmpl 112 12 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2205 0 698 95 0 95 95 0 8 0 ffsino 288 2205 0 698 109 0 109 109 0 8 0 nchpl 144 2887 0 1194 63 0 63 63 0 8 0 uvmvnodes 80 2575 0 0 53 0 53 53 0 8 0 vnodes 216 2575 0 0 144 0 144 144 0 8 0 namei 1024 9469 0 9468 2 1 1 2 0 8 0 percpumem 16 55 0 8 1 0 1 1 0 8 0 kstatmem 264 36 0 12 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 8940 0 8940 9 8 1 8 1 8 1 plimitpl 152 60 0 43 1 0 1 1 0 8 0 sigapl 424 806 0 755 8 2 6 7 0 8 0 knotepl 120 545 0 0 17 0 17 17 0 8 0 kqueuepl 224 116 0 103 1 0 1 1 0 8 0 pipepl 336 140 0 113 3 0 3 3 0 8 0 fdescpl 520 787 0 755 3 0 3 3 0 8 0 filepl 160 4176 0 3958 24 6 18 18 0 8 8 lockfpl 104 126 0 124 1 0 1 1 0 8 0 lockfspl 48 59 0 57 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 41 0 24 1 0 1 1 0 8 0 ucredpl 104 572 0 559 1 0 1 1 0 8 0 zombiepl 144 886 0 885 1 0 1 1 0 8 0 processpl 1208 806 0 755 5 0 5 5 0 8 0 procpl 656 1404 0 1341 7 1 6 6 0 8 0 srpgc 96 6 0 6 2 1 1 1 0 8 1 sosppl 168 5 0 5 2 1 1 1 0 8 1 sockpl 728 1010 0 981 28 17 11 21 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 71 0 0 2 0 2 2 0 8 0 mbufpl 256 1139 0 0 72 0 72 72 0 8 0 bufpl 280 3093 0 127 212 0 212 212 0 8 0 anonpl 32 7459 0 0 61 0 61 61 0 246 0 amapchunkpl 152 19828 0 19227 40 10 30 30 0 158 5 amappl16 200 2198 0 2164 8 4 4 6 0 8 0 amappl15 192 12 0 12 1 1 0 1 0 8 0 amappl14 184 131 0 119 1 0 1 1 0 8 0 amappl13 176 10 0 10 1 1 0 1 0 8 0 amappl12 168 1479 0 1447 4 1 3 3 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 5 0 4 1 0 1 1 0 8 0 amappl9 144 284 0 284 1 1 0 1 0 8 0 amappl8 136 30 0 27 1 0 1 1 0 8 0 amappl7 128 134 0 122 1 0 1 1 0 8 0 amappl6 120 217 0 214 1 0 1 1 0 8 0 amappl5 112 133 0 123 1 0 1 1 0 8 0 amappl4 104 337 0 317 1 0 1 1 0 8 0 amappl3 96 3683 0 3561 5 1 4 4 0 8 0 amappl2 88 686 0 623 2 0 2 2 0 8 0 amappl1 80 10008 0 9406 15 0 15 15 0 8 0 amappl 88 5515 0 5329 5 0 5 5 0 92 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 128 254 0 254 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 14 0 1 1 0 1 1 0 8 0 uaddrrnd 24 788 0 756 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 788 0 756 1 0 1 1 0 8 0 vmmpekpl 168 8082 0 8042 3 0 3 3 0 8 0 vmmpepl 168 55573 0 53522 95 3 92 92 0 357 2 vmsppl 480 787 0 756 6 1 5 5 0 8 0 rwobjpl 72 19560 0 16015 65 0 65 65 0 8 0 pdppl 4096 1583 0 1512 103 30 73 83 0 8 2 pvpl 32 15604 0 0 127 1 126 126 0 265 0 pmappl 256 787 0 756 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 446 0 38 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff8000ffff0cf8,ffff80002ebd2120,ffff80002ebd2070) at sys_semop+0x3ae sys/kern/sysv_sem.c:620 syscall(ffff80002ebd2120) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ebd2120) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xecd7141aa90, 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 end of kernel end trace frame: 0x7c0bd9281d40, count: -3