witness: lock order reversal: 1st 0xffff800010fda3f8 sbufrcv (&so->so_rcv.sb_lock) 2nd 0xfffffd80739fa340 inode (&ip->i_lock) lock order [1] sbufrcv (&so->so_rcv.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff8342aaee -> 0xffffffff8347bc4f is missing lock order [2] inode (&ip->i_lock) -> [1] sbufrcv (&so->so_rcv.sb_lock) #0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 #1 sblock+0xb6 sys/kern/uipc_socket2.c:536 #2 soreceive+0x27d sys/kern/uipc_socket.c:890 #3 fifo_read+0x117 sys/miscfs/fifofs/fifo_vnops.c:264 #4 VOP_READ+0x101 sys/kern/vfs_vops.c:227 #5 vn_rdwr+0x15b sys/kern/vfs_vnops.c:-1 #6 vndsetcred+0xa1 sys/dev/vnd.c:685 #7 vndioctl+0xdfc sys/dev/vnd.c:486 #8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537 #10 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #11 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #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:438 witness_checkorder(fffffd80739fa340,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd80739fa328,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd80739fa328,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd805e881cc0,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 vn_lock(fffffd805e881cc0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:576 vfs_getcwd_common(fffffd805e881cc0,fffffd805e881cc0,0,0,200,0,a9a66287e1ed275b) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd805e881cc0,fffffd805e881cc0,ffff80003c48e038) at vn_isunder+0x56 sys/kern/vfs_vnops.c:700 unp_externalize(fffffd8073887f00,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090 soreceive(ffff800010fda308,ffff80003c4c3378,ffff80003c4c3328,0,ffff80003c4c3360,ffff80003c4c34ec,9b4f771776a28129) at soreceive+0xc24 sys/kern/uipc_socket.c:1029 recvit(ffff80003c48e038,6,ffff80003c4c34c0,0,ffff80003c4c3570) at recvit+0x40b sys/kern/uipc_syscalls.c:1078 sys_recvmsg(ffff80003c48e038,ffff80003c4c3620,ffff80003c4c3570) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 syscall(ffff80003c4c3620) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4c3620) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc400d7659e0, count: -14 ddb{1}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c4c2e00 rbx 0 rdx 0xffff8000015cf640 rcx 0xffff80003c48e038 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c4c2ce0 r9 0x8080808080808080 r10 0xf275ea577c6d8996 r11 0x54183068e3a3aad3 r12 0xfffffd80040ac880 r13 0xfffffd8004894c58 r14 0x3 r15 0xffffffff8351501e substchar+0xe738 rip 0xffffffff8336ffa5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c4c2df0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=470992 pid=80963 tcnt=3 stat=onproc flags process=1000000 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c48f790,0xffffffff83acfa18 process=0xffff80003c492b80 user=0xffff80003c4be000, vmspace=0xfffffd806c6c07b8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 44528 85289 39703 0 3 0x80 nanoslp syz-executor 44528 162931 39703 0 3 0x4000080 fsleep syz-executor 44528 41069 39703 0 3 0x4000080 fsleep syz-executor 80963 443615 88145 0 2 0x1000000 syz-executor 80963 419798 88145 0 3 0x5000080 ttyopn syz-executor *80963 470992 88145 0 7 0x5000000 syz-executor 9107 488661 5756 0 3 0x80 nanoslp syz-executor 9107 227344 5756 0 3 0x4000080 netacc syz-executor 9107 53160 5756 0 3 0x4000080 fsleep syz-executor 58074 191741 88436 0 3 0x80 nanoslp syz-executor 58074 103180 88436 0 3 0x4000080 piperd syz-executor 58074 201357 88436 0 3 0x4000080 kqread syz-executor 33112 330164 69707 0 3 0x80 nanoslp syz-executor 33112 258133 69707 0 3 0x4000080 ttyout syz-executor 43314 423197 53278 0 3 0x80 nanoslp syz-executor 43314 41504 53278 0 3 0x4000080 piperd syz-executor 43314 337420 53278 0 3 0x4000080 fsleep syz-executor 59598 302808 1 0 3 0x80 nanoslp init 55361 309845 0 0 3 0x14280 nfsidl nfsio 72274 257397 0 0 3 0x14280 nfsidl nfsio 49604 363773 0 0 3 0x14280 nfsidl nfsio 76232 148487 0 0 3 0x14280 nfsidl nfsio 31436 405019 0 0 3 0x14280 nfsidl nfsio 6686 247894 0 0 3 0x14280 nfsidl nfsio 47266 372755 0 0 3 0x14280 nfsidl nfsio 97753 511985 0 0 3 0x14280 nfsidl nfsio 64635 275149 0 0 3 0x14280 nfsidl nfsio 32379 291401 0 0 3 0x14280 nfsidl nfsio 53441 470613 0 0 3 0x14280 nfsidl nfsio 6555 322385 0 0 3 0x14280 nfsidl nfsio 49057 97697 0 0 3 0x14280 nfsidl nfsio 33809 69898 0 0 3 0x14280 nfsidl nfsio 82068 438190 0 0 3 0x14280 nfsidl nfsio 6835 188290 0 0 3 0x14280 nfsidl nfsio 73311 68206 0 0 3 0x14280 nfsidl nfsio 45486 107621 0 0 3 0x14280 nfsidl nfsio 64110 443249 0 0 3 0x14280 nfsidl nfsio 34042 86422 0 0 3 0x14280 nfsidl nfsio 38560 35754 54888 0 3 0x3000 suspend syz-executor 38560 277949 54888 0 2 0x4081000 syz-executor 38560 362617 54888 0 3 0x4081000 inode syz-executor 38560 399736 54888 0 3 0x4081000 inode syz-executor 38560 383922 54888 0 3 0x4081000 inode syz-executor 38560 15592 54888 0 3 0x4081000 inode syz-executor 24648 245840 0 0 3 0x14200 acct acct 85504 483668 83218 0 3 0x82 nanoslp syz-executor 5756 488574 83218 0 3 0x82 nanoslp syz-executor 54888 261260 83218 0 3 0x82 wait syz-executor 39703 393977 83218 0 3 0x82 nanoslp syz-executor 69707 447767 83218 0 3 0x82 nanoslp syz-executor 88145 358857 83218 0 3 0x82 nanoslp syz-executor 88436 499996 83218 0 3 0x82 nanoslp syz-executor 53278 386241 83218 0 3 0x82 nanoslp syz-executor 83218 333171 41073 0 3 0x82 kqread syz-executor 41073 62383 80278 0 3 0x10008a sigsusp ksh 80278 319157 58474 0 3 0x98 kqread sshd-session 58474 153648 18433 0 3 0x92 kqread sshd-session 18433 211857 1 0 3 0x88 kqread sshd 61558 299445 14269 74 3 0x1100092 bpf pflogd 14269 288838 1 0 3 0x80 sbwait pflogd 93396 85065 87812 73 3 0x1100090 kqread syslogd 87812 407283 1 0 3 0x100082 sbwait syslogd 79495 113222 1 0 3 0x100080 kqread resolvd 50347 464675 52175 77 3 0x100092 kqread dhcpleased 625 398831 52175 77 3 0x100092 kqread dhcpleased 52175 382535 1 0 3 0x80 kqread dhcpleased 30537 492076 0 0 3 0x14200 bored smr 9681 249243 0 0 3 0x14200 pgzero zerothread 6579 329428 0 0 3 0x14200 aiodoned aiodoned 62383 202297 0 0 3 0x14200 syncer update 88666 338930 0 0 3 0x14200 cleaner cleaner 9834 375387 0 0 3 0x14200 reaper reaper 94692 214153 0 0 3 0x14200 pgdaemon pagedaemon 8744 513713 0 0 3 0x14200 bored viomb 52987 373994 0 0 3 0x40014200 acpi0 acpi0 34977 309663 0 0 3 0x40014200 idle1 11521 168820 0 0 3 0x14200 bored softnet1 21849 432551 0 0 2 0x14200 softnet0 56762 4320 0 0 3 0x14200 bored systqmp 84230 183327 0 0 3 0x14200 bored systq 12096 380199 0 0 3 0x14200 tmoslp softclockmp 62499 124662 0 0 3 0x40014200 tmoslp softclock 73184 313126 0 0 3 0x40014200 idle0 1 318715 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 80963 (syz-executor) thread 0xffff80003c48e038 (470992) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839ca800) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 unp_externalize+0x155 sys/kern/uipc_usrreq.c:-1 #2 soreceive+0xc24 sys/kern/uipc_socket.c:1029 #3 recvit+0x40b sys/kern/uipc_syscalls.c:1078 #4 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 exclusive rwlock sbufrcv r = 0 (0xffff800010fda3f8) #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 sblock+0xb6 sys/kern/uipc_socket2.c:536 #3 soreceive+0x27d sys/kern/uipc_socket.c:890 #4 recvit+0x40b sys/kern/uipc_syscalls.c:1078 #5 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 Process 38560 (syz-executor) thread 0xffff80003c3b8a80 (277949) exclusive rrwlock inode r = 0 (0xfffffd806e891578) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vn_write+0x18f sys/kern/vfs_vnops.c:411 #6 dofilewritev+0x2bd sys/kern/sys_generic.c:384 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 Process 38560 (syz-executor) thread 0xffff80003c3b87e8 (362617) exclusive rrwlock inode r = 0 (0xfffffd80607e40c8) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x10f sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 sys_chdir+0x88 change_dir sys/kern/vfs_syscalls.c:837 [inline] #7 sys_chdir+0x88 sys/kern/vfs_syscalls.c:783 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11062 12086K 12237K 166960K 12422 0 pcb 17 15K 17K 166960K 93 0 rtable 243 9K 10K 166960K 426 0 pf 37 18K 22K 166960K 97 0 ifaddr 44 7K 8K 166960K 63 0 ifgroup 55 2K 2K 166960K 85 0 sysctl 4 1K 9K 166960K 9 0 counters 70 37K 37K 166960K 116 0 ioctlops 0 0K 4K 166960K 1614 0 iov 0 0K 36K 166960K 18 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1326 83K 84K 166960K 1561 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 20 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 331 0 sigio 0 0K 0K 166960K 2 0 proc 63 99K 164K 166960K 582 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 2 0K 0K 166960K 14 0 in_multi 96 7K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 398 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 245 160K 169K 166960K 4887 0 UVM aobj 38 3K 3K 166960K 39 0 pinsyscall 41 82K 104K 166960K 1473 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 12 0K 2K 166960K 40 0 temp 41 9106K 9175K 166960K 15958 0 kqueue 13 20K 28K 166960K 75 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 51 0 46 1 0 1 1 0 8 0 rtentry 176 123 0 21 6 0 6 6 0 8 0 unpcb 144 122 0 101 1 0 1 1 0 8 0 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 238 0 232 13 2 11 13 0 8 10 arp 136 19 0 0 1 0 1 1 0 8 0 inpcb 328 469 0 460 12 3 9 12 0 8 8 nd6 152 26 0 3 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 21 0 21 1 0 1 1 0 8 1 pppxif 1576 1 0 1 1 0 1 1 0 8 1 pfstscr 40 3 0 2 1 0 1 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 0 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 6 0 4 1 0 1 1 0 8 0 pfanchor 1288 5 0 4 1 0 1 1 0 8 0 pftag 88 4 0 4 1 0 1 1 0 8 1 pfstitem 24 40 0 0 1 0 1 1 0 8 0 pfstkey 128 44 0 5 2 0 2 2 0 8 0 pfstate 448 39 0 2 5 0 5 5 0 8 0 pfrule 1360 39 0 32 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 545 0 73 31 0 31 31 0 8 0 art_table 40 546 0 73 5 0 5 5 0 8 0 art_node 32 123 0 32 1 0 1 1 0 8 0 semapl 112 18 0 8 1 0 1 1 0 8 0 shmpl 112 36 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1970 0 501 93 0 93 93 0 8 0 ffsino 296 1970 0 501 114 0 114 114 0 8 0 nchpl 144 2449 0 741 64 0 64 64 0 8 0 rtmask 32 10 0 10 1 0 1 1 0 8 1 vnodes 216 2177 0 0 121 0 121 121 0 8 0 namei 1024 7960 0 7955 3 1 2 2 0 8 1 percpumem 16 73 0 23 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 51 0 24 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 12871 0 12871 11 3 8 8 1 8 8 plimitpl 152 102 0 83 1 0 1 1 0 8 0 sigapl 424 666 0 597 8 0 8 8 0 8 0 knotepl 120 533 0 0 17 0 17 17 0 8 0 kqueuepl 224 82 0 72 1 0 1 1 0 8 0 pipepl 344 136 0 107 3 0 3 3 0 8 0 fdescpl 528 629 0 598 3 0 3 3 0 8 0 filepl 160 3151 0 2918 15 0 15 15 0 8 4 lockfpl 104 67 0 65 1 0 1 1 0 8 0 lockfspl 48 29 0 27 1 0 1 1 0 8 0 sessionpl 144 92 0 84 1 0 1 1 0 8 0 pgrppl 48 100 0 84 1 0 1 1 0 8 0 ucredpl 104 390 0 377 1 0 1 1 0 8 0 zombiepl 144 598 0 597 2 1 1 1 0 8 0 processpl 1232 666 0 597 7 1 6 6 0 8 0 procpl 664 1007 0 922 8 0 8 8 0 8 0 sockpl 752 648 0 613 17 5 12 17 0 8 8 mcl64k 65536 11 0 0 2 0 2 2 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 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 43 0 0 6 0 6 6 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 238 0 0 15 0 15 15 0 8 0 bufpl 280 5090 0 106 356 0 356 356 0 8 0 anonpl 32 9258 0 0 75 0 75 75 0 246 0 amapchunkpl 152 15200 0 14541 34 0 34 34 0 158 7 amappl16 200 2713 0 2465 21 4 17 19 0 8 3 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 431 0 430 1 0 1 1 0 8 0 amappl13 176 115 0 104 1 0 1 1 0 8 0 amappl12 168 923 0 893 2 0 2 2 0 8 0 amappl11 160 63 0 62 1 0 1 1 0 8 0 amappl10 152 66 0 52 1 0 1 1 0 8 0 amappl9 144 266 0 266 1 1 0 1 0 8 0 amappl8 136 100 0 98 1 0 1 1 0 8 0 amappl7 128 146 0 132 1 0 1 1 0 8 0 amappl6 120 162 0 161 1 0 1 1 0 8 0 amappl5 112 95 0 83 1 0 1 1 0 8 0 amappl4 104 288 0 269 1 0 1 1 0 8 0 amappl3 96 2847 0 2730 4 0 4 4 0 8 0 amappl2 88 523 0 464 2 0 2 2 0 8 0 amappl1 80 10037 0 9448 15 1 14 15 0 8 1 amappl 88 4150 0 3974 5 0 5 5 0 92 0 uvmvnodes 80 108 0 0 3 0 3 3 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 7 0 7 2 1 1 1 0 8 1 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 38 0 1 1 0 1 1 0 8 0 uaddrrnd 24 629 0 598 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 629 0 598 1 0 1 1 0 8 0 vmmpekpl 168 6843 0 6806 2 0 2 2 0 8 0 vmmpepl 168 47856 0 45718 101 0 101 101 0 357 5 vmsppl 488 628 0 597 5 0 5 5 0 8 1 rwobjpl 80 16613 0 15327 29 0 29 29 0 8 2 pdppl 4096 1265 0 1194 97 26 71 85 0 8 0 pvpl 32 17070 0 0 138 0 138 138 0 265 0 pmappl 256 628 0 597 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 297 0 33 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(ffffffff83903ff0) 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(ffffffff839ca000) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839ca000) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 uvm_anfree(fffffd805fdcc288) at uvm_anfree+0xe9 sys/uvm/uvm_anon.c:112 amap_wipeout(fffffd806ab4f280) at amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1 uvm_unmap_detach(ffff80003c3ef1b0,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 uvm_map_teardown(fffffd806c6c0200) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2536 exit1(ffff80003c3b8d18,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003c3b8d18,ffff80003c3ef380,ffff80003c3ef2d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c3ef380) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3ef380) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cd128edd5c0, 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:438 witness_checkorder(fffffd80739fa340,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd80739fa328,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd80739fa328,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd805e881cc0,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 vn_lock(fffffd805e881cc0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:576 vfs_getcwd_common(fffffd805e881cc0,fffffd805e881cc0,0,0,200,0,a9a66287e1ed275b) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd805e881cc0,fffffd805e881cc0,ffff80003c48e038) at vn_isunder+0x56 sys/kern/vfs_vnops.c:700 unp_externalize(fffffd8073887f00,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090 soreceive(ffff800010fda308,ffff80003c4c3378,ffff80003c4c3328,0,ffff80003c4c3360,ffff80003c4c34ec,9b4f771776a28129) at soreceive+0xc24 sys/kern/uipc_socket.c:1029 recvit(ffff80003c48e038,6,ffff80003c4c34c0,0,ffff80003c4c3570) at recvit+0x40b sys/kern/uipc_syscalls.c:1078 sys_recvmsg(ffff80003c48e038,ffff80003c4c3620,ffff80003c4c3570) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 syscall(ffff80003c4c3620) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4c3620) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc400d7659e0, count: -14