witness: lock order reversal: 1st 0xffff800010fde0f8 sbufrcv (&so->so_rcv.sb_lock) 2nd 0xfffffd806bd3e1b8 inode (&ip->i_lock) lock order [1] sbufrcv (&so->so_rcv.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff831555d2 -> 0xffffffff830ce0dc is missing lock order [2] inode (&ip->i_lock) -> [1] sbufrcv (&so->so_rcv.sb_lock) #0 rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 #1 sblock+0xb7 sys/kern/uipc_socket2.c:537 #2 soreceive+0x28e sys/kern/uipc_socket.c:879 #3 fifo_read+0x11a sys/miscfs/fifofs/fifo_vnops.c:264 #4 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #5 vn_rdwr+0x15b #6 vndsetcred+0xa1 sys/dev/vnd.c:684 #7 vndioctl+0xe6c sys/dev/vnd.c:485 #8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #10 sys_ioctl+0x5c3 #11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806bd3e1b8,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806bd3e1a0,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806bd3e1a0,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd806d4a7d90,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806d4a7d90,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd806d4a7d90,fffffd806d4a7e68,0,0,200,0,2a0e35368b8846ff) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd806d4a7d90,fffffd806d4a7e68,ffff8000ffff71e0) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd806ea42100,ec,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086 soreceive(ffff800010fde018,ffff80003c60bd88,ffff80003c60bd38,0,ffff80003c60bd78,ffff80003c60befc,61a1239b6c0c8c70) at soreceive+0xc73 sys/kern/uipc_socket.c:1018 recvit(ffff8000ffff71e0,5,ffff80003c60bed0,0,ffff80003c60bf80) at recvit+0x40a sys/kern/uipc_syscalls.c:1072 sys_recvmsg(ffff8000ffff71e0,ffff80003c60c030,ffff80003c60bf80) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872 syscall(ffff80003c60c030) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c60c030) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x754cbe19210, count: -14 ddb{1}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c60b810 rbx 0xfffffd80043438a0 rdx 0xffff80000129b600 rcx 0xffff8000ffff71e0 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c60b6f0 r9 0x8080808080808080 r10 0x2e7e6844f7648fa9 r11 0xa9b92b1f83ff6bcb r12 0 r13 0xfffffd8003b5af00 r14 0x3 r15 0xffffffff rip 0xffffffff824c8055 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c60b800 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=149427 pid=12244 tcnt=3 stat=onproc flags process=1000000 proc=4000000 runpri=24, usrpri=50, slppri=24, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff87b8,0xffff8000ffff62c0 process=0xffff800037d706f0 user=0xffff80003c607000, vmspace=0xfffffd806bfc0c90 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 12244 106748 66697 0 2 0x1000000 syz-executor *12244 149427 66697 0 7 0x5000000 syz-executor 12244 292358 66697 0 3 0x5000080 fsleep syz-executor 92250 203906 0 0 3 0x14200 bored sosplice 76502 43326 8875 0 2 0 syz-executor 76502 512402 8875 0 3 0x4000080 fsleep syz-executor 76502 358898 8875 0 3 0x4000080 fsleep syz-executor 91308 454893 95942 0 2 0 syz-executor 91308 133219 95942 0 3 0x4000080 sbwait syz-executor 91308 213430 95942 0 3 0x4000000 inode syz-executor 91308 308597 95942 0 3 0x4000000 inode syz-executor 84487 458286 58236 0 2 0 syz-executor 84487 449833 58236 0 7 0x4000000 syz-executor 41543 358392 43964 60929 2 0x10 syz-executor 41543 45981 43964 60929 3 0x4000090 tunread syz-executor 41543 217163 43964 60929 3 0x4000010 inode syz-executor 41543 169747 43964 60929 3 0x4000010 inode syz-executor 41543 346508 43964 60929 3 0x4000010 inode syz-executor 39357 457265 788 0 2 0 syz-executor 39357 137661 788 0 3 0x4000080 kqsel syz-executor 39357 438832 788 0 3 0x4000000 fltagain2 syz-executor 39357 452059 788 0 3 0x4000080 fsleep syz-executor 45076 383154 49580 0 3 0x80 nanoslp syz-executor 45076 499475 49580 0 3 0x4000080 msgwait syz-executor 45076 42665 49580 0 3 0x4000080 fsleep syz-executor 17059 344682 14610 0 3 0x80 nanoslp syz-executor 17059 85892 14610 0 3 0x4000080 ttyout syz-executor 17059 82415 14610 0 3 0x4000080 ttyout syz-executor 17059 128097 14610 0 3 0x4000080 fsleep syz-executor 8875 337108 26598 0 3 0x82 nanoslp syz-executor 43964 32261 26598 0 3 0x82 nanoslp syz-executor 58236 6315 26598 0 3 0x82 nanoslp syz-executor 66697 409892 26598 0 3 0x82 nanoslp syz-executor 788 32139 26598 0 3 0x82 nanoslp syz-executor 95942 139939 26598 0 3 0x82 nanoslp syz-executor 14610 197957 26598 0 3 0x82 nanoslp syz-executor 49580 493837 26598 0 3 0x82 nanoslp syz-executor 26598 143507 21426 0 3 0x82 pipeiolk syz-executor 21426 292776 49194 0 3 0x10008a sigsusp ksh 49194 313798 71351 0 3 0x98 kqread sshd-session 71351 443583 21690 0 3 0x92 kqread sshd-session 12488 505828 1 0 3 0x100083 ttyin getty 21690 299100 1 0 3 0x88 kqread sshd 4552 270549 17508 74 3 0x1100092 bpf pflogd 17508 22534 1 0 3 0x80 sbwait pflogd 64022 15555 14512 73 3 0x1100090 kqread syslogd 14512 408647 1 0 3 0x100082 sbwait syslogd 16895 395167 1 0 3 0x100080 kqread resolvd 61156 334337 64569 77 3 0x100092 kqread dhcpleased 37804 195399 64569 77 3 0x100092 kqread dhcpleased 64569 254093 1 0 3 0x80 kqread dhcpleased 97659 511466 0 0 3 0x14200 bored smr 27116 218255 0 0 2 0x14200 zerothread 59145 324443 0 0 3 0x14200 aiodoned aiodoned 38044 419700 0 0 3 0x14200 syncer update 55608 35099 0 0 3 0x14200 cleaner cleaner 38969 27074 0 0 3 0x14200 reaper reaper 86389 449606 0 0 3 0x14200 pgdaemon pagedaemon 26436 63637 0 0 3 0x14200 bored viomb 97764 289342 0 0 3 0x40014200 acpi0 acpi0 32739 409710 0 0 3 0x40014200 idle1 42308 215729 0 0 3 0x14200 bored softnet3 28896 34964 0 0 3 0x14200 bored softnet2 85100 369668 0 0 3 0x14200 bored softnet1 95584 466549 0 0 2 0x14200 softnet0 34896 57758 0 0 3 0x14200 bored systqmp 34147 257714 0 0 3 0x14200 bored systq 25 102413 0 0 3 0x14200 tmoslp softclockmp 94741 345313 0 0 3 0x40014200 tmoslp softclock 38196 379969 0 0 3 0x40014200 idle0 1 435090 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 12244 (syz-executor) thread 0xffff8000ffff71e0 (149427) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff835c0060) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 unp_externalize+0x14e #2 soreceive+0xc73 sys/kern/uipc_socket.c:1018 #3 recvit+0x40a sys/kern/uipc_syscalls.c:1072 #4 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 exclusive rwlock sbufrcv r = 0 (0xffff800010fde0f8) #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 sblock+0xb7 sys/kern/uipc_socket2.c:537 #3 soreceive+0x28e sys/kern/uipc_socket.c:879 #4 recvit+0x40a sys/kern/uipc_syscalls.c:1072 #5 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 91308 (syz-executor) thread 0xffff8000ffff6cd0 (133219) exclusive rrwlock inode r = 0 (0xfffffd806bd3e0a0) #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 vget+0x2bd sys/kern/vfs_subr.c:694 #6 cache_lookup+0x36e sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x21b sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #10 namei+0x7aa sys/kern/vfs_lookup.c:250 #11 vn_open+0x13f sys/kern/vfs_vnops.c:140 #12 vndioctl+0xcb1 sys/dev/vnd.c:457 #13 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #14 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #15 sys_ioctl+0x5c3 #16 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #16 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #17 Xsyscall+0x128 Process 41543 (syz-executor) thread 0xffff8000ffff67c0 (45981) exclusive rrwlock inode r = 0 (0xfffffd806bd3e2d0) #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 spec_open+0x305 sys/kern/spec_vnops.c:151 #6 VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 #7 vn_open+0x708 sys/kern/vfs_vnops.c:177 #8 vndioctl+0xcb1 sys/dev/vnd.c:457 #9 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #10 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #11 sys_ioctl+0x5c3 #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 41543 (syz-executor) thread 0xffff8000ffff6a48 (217163) exclusive rrwlock inode r = 0 (0xfffffd806bd3ea78) #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 uipc_bind+0x2f4 sys/kern/uipc_usrreq.c:369 #8 sys_bind+0x28a sys/kern/uipc_syscalls.c:189 #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10196 11024K 11214K 166960K 11286 0 pcb 17 12K 12K 166960K 25 0 rtable 238 6K 6K 166960K 364 0 pf 37 18K 18K 166960K 48 0 ifaddr 45 7K 7K 166960K 47 0 ifgroup 60 2K 2K 166960K 60 0 sysctl 1 1K 1K 166960K 1 0 counters 66 36K 36K 166960K 66 0 ioctlops 0 0K 4K 166960K 1486 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1339 84K 84K 166960K 1365 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 3 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 93K 166960K 155 0 sigio 0 0K 0K 166960K 1 0 proc 70 91K 128K 166960K 529 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 6 0 in_multi 103 7K 7K 166960K 108 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 371 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 246 73K 73K 166960K 3037 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 43 86K 105K 166960K 1268 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 1 0 NDP 24 1K 2K 166960K 30 0 temp 40 6887K 6955K 166960K 4572 0 kqueue 13 20K 28K 166960K 28 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 37 0 34 1 0 1 1 0 8 0 rtentry 112 116 0 4 4 0 4 4 0 8 0 unpcb 144 48 0 23 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 808 17 0 12 1 0 1 1 0 8 0 arp 120 19 0 1 1 0 1 1 0 8 0 inpcb 376 97 0 86 2 0 2 2 0 8 0 nd6 136 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 6 0 6 1 0 1 1 0 8 1 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 22 0 0 1 0 1 1 0 8 0 pfstkey 128 22 0 0 1 0 1 1 0 8 0 pfstate 376 22 0 0 3 0 3 3 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 256 457 0 2 29 0 29 29 0 8 0 art_table 32 458 0 2 4 0 4 4 0 8 0 art_node 16 115 0 14 1 0 1 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1585 0 71 95 0 95 95 0 8 0 ffsino 280 1585 0 71 109 0 109 109 0 8 0 nchpl 144 1796 0 104 63 0 63 63 0 8 0 uvmvnodes 80 1677 0 0 35 0 35 35 0 8 0 vnodes 216 1677 0 0 94 0 94 94 0 8 0 namei 1024 5546 0 5543 1 0 1 1 0 8 0 percpumem 16 47 0 0 1 0 1 1 0 8 0 kstatmem 264 26 0 0 2 0 2 2 0 8 0 scxspl 216 5440 0 5440 3 1 2 2 1 8 2 plimitpl 152 30 0 12 1 0 1 1 0 8 0 sigapl 424 464 0 413 8 1 7 7 0 8 1 futexpl 64 402 0 396 1 0 1 1 0 8 0 knotepl 120 503 0 0 16 0 16 16 0 8 0 kqueuepl 216 25 0 15 1 0 1 1 0 8 0 pipepl 328 111 0 83 3 0 3 3 0 8 0 fdescpl 504 445 0 413 5 0 5 5 0 8 0 filepl 152 1588 0 1351 10 0 10 10 0 8 0 lockfpl 104 15 0 11 1 0 1 1 0 8 0 lockfspl 48 9 0 5 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 31 0 14 1 0 1 1 0 8 0 ucredpl 104 104 0 87 1 0 1 1 0 8 0 zombiepl 144 413 0 413 1 0 1 1 0 8 1 processpl 1168 464 0 413 5 0 5 5 0 8 1 procpl 648 506 0 435 7 1 6 6 0 8 0 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 688 182 0 143 4 0 4 4 0 8 0 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 6 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 131 0 0 17 0 17 17 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 10 0 0 2 0 2 2 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 152 0 0 10 0 10 10 0 8 0 bufpl 280 2359 0 129 160 0 160 160 0 8 0 anonpl 24 97898 0 94354 24 0 24 24 0 185 2 amapchunkpl 152 8950 0 8399 22 0 22 22 0 158 0 amappl16 200 1813 0 1791 5 0 5 5 0 8 3 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 114 0 102 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 0 1 1 0 8 1 amappl12 168 1109 0 1077 4 1 3 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 5 0 4 1 0 1 1 0 8 0 amappl9 144 245 0 245 1 0 1 1 0 8 1 amappl8 136 27 0 24 1 0 1 1 0 8 0 amappl7 128 133 0 120 1 0 1 1 0 8 0 amappl6 120 186 0 183 1 0 1 1 0 8 0 amappl5 112 134 0 125 1 0 1 1 0 8 0 amappl4 104 323 0 303 1 0 1 1 0 8 0 amappl3 96 1418 0 1295 3 0 3 3 0 8 0 amappl2 88 653 0 593 2 0 2 2 0 8 0 amappl1 80 8154 0 7571 15 0 15 15 0 8 2 amappl 88 2656 0 2466 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 128 253 0 253 1 1 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 445 0 413 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 445 0 413 1 0 1 1 0 8 0 vmmpekpl 168 5445 0 5408 2 0 2 2 0 8 0 vmmpepl 168 34460 0 32531 89 0 89 89 0 357 2 vmsppl 456 444 0 413 5 0 5 5 0 8 0 rwobjpl 64 14641 0 12009 44 0 44 44 0 8 0 pdppl 4096 897 0 826 97 12 85 85 0 8 14 pvpl 32 11185 0 0 91 0 91 91 0 265 0 pmappl 248 444 0 413 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 274 0 14 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff83484ff0) 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 __mp_lock(ffffffff835bfe58) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835bfe58) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff800034961a60,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff835bfe58) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835bfe58) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff835bfe58) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835bfe58) at __mp_lock+0x19e sys/kern/kern_lock.c:144 vn_write(fffffd806bb5b1e0,ffff800034961e50,0) at vn_write+0x4e sys/kern/vfs_vnops.c:393 dofilewritev(ffff8000ffff6f58,3,ffff800034961e50,0,ffff800034961f10) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffff6f58,ffff800034961fc0,ffff800034961f10) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff800034961fc0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800034961fc0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x919b35eb100, count: -15 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806bd3e1b8,9,0) at witness_checkorder+0x1047 rw_do_enter_write(fffffd806bd3e1a0,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 rrw_enter(fffffd806bd3e1a0,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 VOP_LOCK(fffffd806d4a7d90,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806d4a7d90,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd806d4a7d90,fffffd806d4a7e68,0,0,200,0,2a0e35368b8846ff) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd806d4a7d90,fffffd806d4a7e68,ffff8000ffff71e0) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd806ea42100,ec,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086 soreceive(ffff800010fde018,ffff80003c60bd88,ffff80003c60bd38,0,ffff80003c60bd78,ffff80003c60befc,61a1239b6c0c8c70) at soreceive+0xc73 sys/kern/uipc_socket.c:1018 recvit(ffff8000ffff71e0,5,ffff80003c60bed0,0,ffff80003c60bf80) at recvit+0x40a sys/kern/uipc_syscalls.c:1072 sys_recvmsg(ffff8000ffff71e0,ffff80003c60c030,ffff80003c60bf80) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872 syscall(ffff80003c60c030) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c60c030) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x754cbe19210, count: -14