panic: Data modified on freelist: word 4 of object 0xffff8000014f3200 siWAzeR N0IxNG:1 88 SpPL NrOeTvi ousL OtWyEpReE Df rOeN SeYS C(A0Lx6L5 7623 ! 7= E0XxITde a0f 43 1Stopped at savectx+0xae: movl $0,%gs:0x680 TID PID UID PRFLAGS PFLAGS CPU COMMAND 193118 39910 0 0 0x4000000 0 syz-executor *457819 74620 0 0 0x4000000 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0xb1e9e320ce0, count: 14 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu0: Data modified on freelist: word 4 of object 0xffff8000014f3200 size 0x188 previous type free (0x6563 != 0xdeaf4152) ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xb1e9e320ce0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003a8d6f60 rbx 0 rdx 0xffff80000144dc40 rcx 0xffff80002a452038 rax 0x32 r8 0xffff80003a8d6e90 r9 0x1 r10 0x6833a0b3a7d7b397 r11 0x9e444afb6fa76d93 r12 0 r13 0 r14 0xffff80002a452038 r15 0 rip 0xffffffff81a1a3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003a8d6ee0 ss 0x10 savectx+0xae: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=457819 pid=74620 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a390a58,0xffff80002a453758 process=0xffff8000ffff72a8 user=0xffff80003a8d1000, vmspace=0xfffffd806beab3a8 estcpu=36, cpticks=4, pctcpu=0.0, user=0, sys=4, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 20051 285338 37376 0 3 0x3000 suspend syz-executor 20051 200902 37376 0 2 0x4081000 syz-executor 20051 64901 37376 0 3 0x4081000 inode syz-executor 79036 198249 50986 0 2 0 syz-executor 79036 481013 50986 0 2 0x4000000 syz-executor 39910 490267 42576 0 2 0 syz-executor 39910 193118 42576 0 7 0x4000000 syz-executor 74620 191688 20034 0 2 0 syz-executor *74620 457819 20034 0 7 0x4000000 syz-executor 66052 366204 97369 0 2 0 syz-executor 66052 379417 97369 0 3 0x4000080 fifor syz-executor 66052 280882 97369 0 3 0x4000080 fsleep syz-executor 66052 99184 97369 0 3 0x4000080 fsleep syz-executor 70763 23517 62960 0 2 0x1 syz-executor 70763 54561 62960 0 2 0x4000001 syz-executor 70763 416580 62960 0 3 0x4000080 fsleep syz-executor 59286 457642 0 0 3 0x14200 acct acct 50986 10897 50587 0 3 0x82 nanoslp syz-executor 20034 332902 50587 0 3 0x82 nanoslp syz-executor 42576 231467 50587 0 3 0x82 nanoslp syz-executor 62960 10375 50587 0 3 0x82 nanoslp syz-executor 48636 464481 50587 0 3 0x2 biowait syz-executor 10611 519356 1 0 3 0x100083 ttyin getty 45220 68639 0 0 3 0x14280 nfsidl nfsio 17035 207055 0 0 3 0x14280 nfsidl nfsio 67652 228993 0 0 3 0x14280 nfsidl nfsio 83940 370117 0 0 3 0x14280 nfsidl nfsio 38522 175815 0 0 3 0x14280 nfsidl nfsio 25170 99947 0 0 3 0x14280 nfsidl nfsio 80507 430847 0 0 3 0x14280 nfsidl nfsio 48986 128090 0 0 3 0x14280 nfsidl nfsio 80564 396743 0 0 3 0x14280 nfsidl nfsio 82201 480913 0 0 3 0x14280 nfsidl nfsio 57059 321282 0 0 3 0x14280 nfsidl nfsio 87991 44782 0 0 3 0x14280 nfsidl nfsio 84224 389250 0 0 3 0x14280 nfsidl nfsio 41680 86654 0 0 3 0x14280 nfsidl nfsio 7576 456120 0 0 3 0x14280 nfsidl nfsio 97791 489422 0 0 3 0x14280 nfsidl nfsio 47357 504609 0 0 3 0x14280 nfsidl nfsio 37212 169945 0 0 3 0x14280 nfsidl nfsio 90129 480291 0 0 3 0x14280 nfsidl nfsio 90948 282341 0 0 3 0x14280 nfsidl nfsio 66047 7050 0 0 3 0x14200 bored sosplice 97369 193609 50587 0 3 0x82 nanoslp syz-executor 37376 517369 50587 0 3 0x82 nanoslp syz-executor 50587 59570 72457 0 3 0x82 wait syz-executor 72457 182984 66598 0 3 0x10008a sigsusp ksh 66598 287115 35029 0 3 0x98 kqread sshd-session 35029 197274 97217 0 3 0x92 kqread sshd-session 97217 101645 1 0 3 0x88 kqread sshd 97263 314406 13018 74 3 0x1100092 bpf pflogd 13018 249330 1 0 3 0x80 sbwait pflogd 90157 388962 87898 73 3 0x1100090 kqread syslogd 87898 104329 1 0 3 0x100082 sbwait syslogd 13445 421353 1 0 3 0x100080 kqread resolvd 26974 494674 86929 77 3 0x100092 kqread dhcpleased 97472 251686 86929 77 3 0x100092 kqread dhcpleased 86929 298420 1 0 3 0x80 kqread dhcpleased 13821 40495 0 0 3 0x14200 bored smr 20632 2241 0 0 2 0x14200 zerothread 46011 208574 0 0 3 0x14200 aiodoned aiodoned 38036 514182 0 0 3 0x14200 syncer update 96323 508816 0 0 3 0x14200 cleaner cleaner 38146 126685 0 0 3 0x14200 reaper reaper 80205 482516 0 0 3 0x14200 pgdaemon pagedaemon 92445 357516 0 0 3 0x14200 bored viomb 13706 202631 0 0 3 0x40014200 acpi0 acpi0 58386 132388 0 0 3 0x40014200 idle1 80947 80836 0 0 3 0x14200 bored softnet3 31044 488862 0 0 3 0x14200 bored softnet2 92804 431771 0 0 3 0x14200 bored softnet1 96934 418813 0 0 3 0x14200 bored softnet0 41631 296218 0 0 3 0x14200 bored systqmp 51403 272426 0 0 3 0x14200 bored systq 66167 376581 0 0 3 0x14200 tmoslp softclockmp 67769 186604 0 0 3 0x40014200 tmoslp softclock 83776 13283 0 0 3 0x40014200 idle0 1 171356 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff8383f188) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 malloc+0x2f9 sys/kern/kern_malloc.c:199 #4 bpfopen+0x11b #5 spec_open_clone+0x287 sys/kern/spec_vnops.c:722 #6 spec_open+0x329 sys/kern/spec_vnops.c:148 #7 VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 #8 vn_open+0x708 sys/kern/vfs_vnops.c:177 #9 doopenat+0x32e sys/kern/vfs_syscalls.c:1139 #10 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 Process 20051 (syz-executor) thread 0xffff80002a452a78 (200902) exclusive rrwlock inode r = 0 (0xfffffd806dec69a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x190 sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 20051 (syz-executor) thread 0xffff80002a391c48 (64901) exclusive rrwlock inode r = 0 (0xfffffd806dd030c8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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:524 #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 vn_open+0x1f4 sys/kern/vfs_vnops.c:107 #8 doopenat+0x32e sys/kern/vfs_syscalls.c:1139 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 Process 79036 (syz-executor) thread 0xffff80003c4f22b8 (481013) exclusive rwlock vmmaplk r = 0 (0xfffffd806beabbc8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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:1860 #4 uvm_fault_check+0x987 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] #4 uvm_fault_check+0x987 sys/uvm/uvm_fault.c:774 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:668 #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 39910 (syz-executor) thread 0xffff80003c4f34a8 (193118) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8399f380) #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:174 #5 checkalias+0x21c sys/kern/vfs_subr.c:602 #6 cdevvp+0xd2 sys/kern/vfs_subr.c:525 #7 spec_open_clone+0x1ee sys/kern/spec_vnops.c:713 #8 spec_open+0x329 sys/kern/spec_vnops.c:148 #9 VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 #10 vn_open+0x708 sys/kern/vfs_vnops.c:177 #11 doopenat+0x32e sys/kern/vfs_syscalls.c:1139 #12 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 Process 48636 (syz-executor) thread 0xffff80002a453c68 (464481) exclusive rrwlock inode r = 0 (0xfffffd806dd43de0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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:524 #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:3117 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ea54ed8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #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:524 #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:3102 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10216 11123K 12419K 166960K 15807 0 pcb 17 17K 19K 166960K 520 0 rtable 212 12K 12K 166960K 1049 0 pf 39 18K 22K 166960K 274 0 ifaddr 40 7K 8K 166960K 194 0 ifgroup 59 2K 2K 166960K 309 0 sysctl 4 1K 2K 166960K 7 0 counters 66 36K 37K 166960K 360 0 ioctlops 0 0K 4K 166960K 1868 0 iov 0 0K 24K 166960K 269 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1515 95K 96K 166960K 3800 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 53 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 102 0 dirhash 12 2K 2K 166960K 78 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 93K 166960K 2871 0 sigio 0 0K 0K 166960K 49 0 proc 72 91K 128K 166960K 1259 0 subproc 72 4K 4K 166960K 208 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 622 0 in_multi 84 6K 7K 166960K 336 0 ether_multi 1 0K 0K 166960K 12 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 121 546K 546K 166960K 121 0 exec 0 0K 1K 166960K 994 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 229 73K 88K 166960K 27974 0 UVM aobj 83 5K 5K 166960K 86 0 pinsyscall 41 82K 104K 166960K 4358 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 228 0 NDP 15 0K 2K 166960K 139 0 temp 80 8692K 8946K 166960K 107449 0 kqueue 16 23K 34K 166960K 501 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 120 317 0 313 3 2 1 3 0 8 0 rtentry 160 329 0 245 5 0 5 5 0 8 0 unpcb 144 2071 0 2050 15 11 4 6 0 8 3 syncache 336 6 0 6 2 2 0 1 0 8 0 tcpcb 808 869 0 863 28 24 4 8 0 8 3 arp 120 55 0 39 1 0 1 1 0 8 0 inpcb 376 3191 0 3180 38 31 7 15 0 8 5 nd6 136 74 0 52 1 0 1 1 0 8 0 pkpcb 40 27 0 27 5 4 1 1 0 8 1 kcovpl 48 23 0 15 1 0 1 1 0 8 0 mppekey 1024 35 0 35 2 2 0 1 0 8 0 ppxss 1168 111 0 111 3 2 1 1 0 8 1 pppxif 1480 7 0 7 5 5 0 1 0 8 0 pffrag 232 13 0 8 1 0 1 1 0 482 0 pffrnode 88 13 0 8 1 0 1 1 0 8 0 pffrent 40 20 0 14 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 4 0 4 1 1 0 1 0 8 0 pfanchor 1288 2 0 1 1 0 1 1 0 8 0 pfstitem 24 165 0 99 1 0 1 1 0 8 0 pfstkey 128 170 0 104 3 0 3 3 0 8 0 pfstate 376 167 0 102 9 0 9 9 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1364 0 998 30 3 27 29 0 8 1 art_table 32 1368 0 998 4 0 4 4 0 8 0 art_node 16 318 0 244 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 12 1 0 1 1 0 8 0 semupl 112 4 0 4 4 4 0 1 0 8 0 semapl 112 99 0 89 1 0 1 1 0 8 0 shmpl 112 83 0 3 3 0 3 3 0 8 0 dirhash 1024 61 0 44 3 0 3 3 0 8 0 dino2pl 256 6452 0 4919 96 0 96 96 0 8 0 ffsino 280 6452 0 4919 110 0 110 110 0 8 0 nchpl 144 10332 0 8609 64 0 64 64 0 8 0 rtmask 32 15 0 15 5 5 0 1 0 8 0 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 37598 0 37596 4 3 1 2 0 8 0 percpumem 16 194 0 147 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 186 0 160 3 1 2 3 0 8 0 scsiplug 72 7 0 7 4 4 0 1 0 8 0 scxspl 216 32624 0 32623 16 14 2 8 1 8 1 plimitpl 152 516 0 499 1 0 1 1 0 8 0 sigapl 424 3173 0 3103 9 0 9 9 0 8 0 futexpl 64 40858 0 40855 1 0 1 1 0 8 0 knotepl 120 1049 0 0 31 0 31 31 0 8 0 kqueuepl 216 966 0 954 10 9 1 3 0 8 0 pipepl 328 430 0 403 8 5 3 8 0 8 0 fdescpl 504 3125 0 3095 5 0 5 5 0 8 0 filepl 152 20639 0 20419 41 24 17 21 0 8 5 lockfpl 104 1174 0 1172 2 1 1 2 0 8 0 lockfspl 48 348 0 346 1 0 1 1 0 8 0 sessionpl 144 41 0 32 1 0 1 1 0 8 0 pgrppl 48 164 0 147 1 0 1 1 0 8 0 ucredpl 104 3323 0 3308 1 0 1 1 0 8 0 zombiepl 144 3852 0 3850 1 0 1 1 0 8 0 processpl 1176 3173 0 3103 6 0 6 6 0 8 0 procpl 656 7503 0 7423 8 0 8 8 0 8 0 srpgc 96 25 0 25 9 9 0 1 0 8 0 sosppl 168 20 0 20 5 5 0 1 0 8 0 sockpl 688 5648 0 5613 60 51 9 24 0 8 5 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 124 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 36 0 0 4 0 4 4 0 8 0 mtagpl 96 259 0 0 6 0 6 6 0 8 0 mbufpl 256 2357 0 0 146 0 146 146 0 8 0 bufpl 280 8107 0 1952 440 0 440 440 0 8 0 anonpl 24 322170 0 316386 64 15 49 49 0 184 6 amapchunkpl 152 93995 0 93429 48 18 30 32 0 158 4 amappl16 200 4518 0 4434 15 8 7 9 0 8 0 amappl15 192 40 0 40 1 1 0 1 0 8 0 amappl14 184 149 0 137 1 0 1 1 0 8 0 amappl13 176 27 0 27 1 1 0 1 0 8 0 amappl12 168 4011 0 3980 4 2 2 3 0 8 0 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl10 152 56 0 56 1 1 0 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 46 0 43 1 0 1 1 0 8 0 amappl7 128 140 0 127 1 0 1 1 0 8 0 amappl6 120 325 0 320 1 0 1 1 0 8 0 amappl5 112 179 0 169 1 0 1 1 0 8 0 amappl4 104 380 0 358 1 0 1 1 0 8 0 amappl3 96 18999 0 18888 4 0 4 4 0 8 0 amappl2 88 895 0 831 2 0 2 2 0 8 0 amappl1 80 17613 0 17037 15 1 14 14 0 8 0 amappl 88 27322 0 27150 5 0 5 5 0 92 0 dma65536 65536 2 0 2 2 2 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 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 2 0 1 0 8 0 dma64 64 7 0 7 2 2 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 85 0 3 2 0 2 2 0 8 0 uaddrrnd 24 3125 0 3095 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3125 0 3095 1 0 1 1 0 8 0 vmmpekpl 168 24098 0 24034 4 0 4 4 0 8 0 vmmpepl 168 189071 0 187172 96 7 89 91 0 357 1 vmsppl 456 3124 0 3095 5 0 5 5 0 8 0 rwobjpl 64 51124 0 44112 115 0 115 115 0 8 0 pdppl 4096 6258 0 6190 142 68 74 86 0 8 6 pvpl 32 15921 0 0 128 0 128 128 0 265 0 pmappl 248 3124 0 3095 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 500 0 115 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83804ff0) 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 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x77 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x77 sys/dev/acpi/acpitimer.c:120 comcnputc(800,31) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(31) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(31) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff833d1572) at db_printf+0x9b panic(ffffffff833910ca) at panic+0x103 sys/kern/subr_prf.c:216 malloc(188,2,a) at malloc+0xd7c sys/kern/kern_malloc.c:353 bpfopen(31700,41,2000,ffff80003c4f34a8) at bpfopen+0x11b spec_open_clone(ffff80003c0d2a78) at spec_open_clone+0x287 sys/kern/spec_vnops.c:722 end trace frame: 0xffff80003c0d2a60, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83804ff0) 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 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x77 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x77 sys/dev/acpi/acpitimer.c:120 comcnputc(800,31) at comcnputc+0x29b sys/dev/ic/com.c:1269 cnputc(31) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(31) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x2aba sys/kern/subr_prf.c:1065 db_printf(ffffffff833d1572) at db_printf+0x9b panic(ffffffff833910ca) at panic+0x103 sys/kern/subr_prf.c:216 malloc(188,2,a) at malloc+0xd7c sys/kern/kern_malloc.c:353 bpfopen(31700,41,2000,ffff80003c4f34a8) at bpfopen+0x11b spec_open_clone(ffff80003c0d2a78) at spec_open_clone+0x287 sys/kern/spec_vnops.c:722 spec_open(ffff80003c0d2a78) at spec_open+0x329 sys/kern/spec_vnops.c:148 VOP_OPEN(fffffd806ed55a50,41,fffffd807f7d3068,ffff80003c4f34a8) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 vn_open(ffff80003c0d2cc8,41,0) at vn_open+0x708 sys/kern/vfs_vnops.c:177 doopenat(ffff80003c4f34a8,ffffff9c,400000000440,40,0,ffff80003c0d2e70) at doopenat+0x32e sys/kern/vfs_syscalls.c:1139 syscall(ffff80003c0d2f20) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c0d2f20) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x512072722b0, count: -20 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x680 savectx() at savectx+0xae end of kernel end trace frame: 0xb1e9e320ce0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xb1e9e320ce0, count: -1