witness: lock order reversal: 1st 0xffff800010fde610 sbufrcv (&so->so_rcv.sb_lock) 2nd 0xfffffd806bd873d0 inode (&ip->i_lock) lock order [1] sbufrcv (&so->so_rcv.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff830f39f6 -> 0xffffffff8306b4aa is missing lock order [2] inode (&ip->i_lock) -> [1] sbufrcv (&so->so_rcv.sb_lock) #0 rw_enter+0x122 #1 sblock+0xb7 sys/kern/uipc_socket2.c:549 #2 soreceive+0x295 sys/kern/uipc_socket.c:945 #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+0xf6 sys/kern/vfs_vnops.c:525 #10 sys_ioctl+0x67c #11 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #11 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 Stopped at db_enter+0x25: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806bd873d0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806bd873c0,1) at rw_enter+0x122 rrw_enter(fffffd806bd873c0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806026eb10,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806026eb10,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_getcwd_common(fffffd806026eb10,fffffd805ebd3e78,0,0,200,0,16f5168bd20c658c) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd806026eb10,fffffd805ebd3e78,ffff8000371e7c00) at vn_isunder+0x56 sys/kern/vfs_vnops.c:688 unp_externalize(fffffd8062d40500,101,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1094 soreceive(ffff800010fde540,ffff8000371eda08,ffff8000371ed9b8,0,ffff8000371ed9f8,ffff8000371edb7c,ec20b3beafe0fc95) at soreceive+0xd3e sys/kern/uipc_socket.c:1090 recvit(ffff8000371e7c00,5,ffff8000371edb50,0,ffff8000371edb40) at recvit+0x40a sys/kern/uipc_syscalls.c:1079 sys_recvmmsg(ffff8000371e7c00,ffff8000371edd10,ffff8000371edc60) at sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:970 syscall(ffff8000371edd10) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371edd10) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xefd0566d8a0, count: -14 ddb{0}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff8000371ed460 rbx 0xfffffd80042c34e8 rdx 0xffff8000012a2380 rcx 0xffff8000371e7c00 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff8000371ed340 r9 0x8080808080808080 r10 0xe1cb91f19838b68a r11 0xd844f9f1f758d5eb r12 0 r13 0xfffffd8003adae00 r14 0x3 r15 0xffffffff rip 0xffffffff81610e15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000371ed450 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=89544 pid=49286 tcnt=3 stat=onproc flags process=1000000 proc=4000000 runpri=24, usrpri=66, slppri=24, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000371e6a48,0xffff8000371e7988 process=0xffff8000371b96c8 user=0xffff8000371e8000, vmspace=0xfffffd806bee5720 estcpu=16, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 84539 458197 16943 0 7 0 syz-executor 63092 510098 63133 0 2 0 syz-executor 4187 399926 68400 0 2 0 syz-executor 4187 506778 68400 0 3 0x4000080 sbwait syz-executor 49286 295370 14132 0 2 0x1000000 syz-executor *49286 89544 14132 0 7 0x5000000 syz-executor 49286 32909 14132 0 2 0x5000000 syz-executor 31897 224377 4596 0 2 0 syz-executor 31897 238427 4596 0 3 0x4000080 rest syz-executor 31897 379380 4596 0 3 0x4000080 fsleep syz-executor 31897 208927 4596 0 3 0x4000080 fsleep syz-executor 34009 298510 85577 0 2 0 syz-executor 34009 429713 85577 0 3 0x4000080 lockf syz-executor 34009 167263 85577 0 3 0x4000000 biowait syz-executor 3815 345597 0 0 3 0x14200 bored sosplice 85577 189657 93615 0 3 0x82 nanoslp syz-executor 93898 276362 93615 0 3 0x82 wait syz-executor 14132 392851 93615 0 3 0x82 nanoslp syz-executor 63133 99606 93615 0 3 0x82 nanoslp syz-executor 16943 127899 93615 0 3 0x82 nanoslp syz-executor 65019 178390 93615 0 3 0x2 biowait syz-executor 4596 323166 93615 0 3 0x82 nanoslp syz-executor 68400 139997 93615 0 3 0x82 nanoslp syz-executor 93615 156106 50009 0 3 0x82 kqread syz-executor 50009 74337 47854 0 3 0x10008a sigsusp ksh 47854 247404 29476 0 3 0x98 kqread sshd-session 29476 224669 52696 0 3 0x92 kqread sshd-session 31352 412867 1 0 3 0x100083 ttyin getty 52696 133360 1 0 3 0x88 kqread sshd 13251 446823 90199 74 3 0x1100092 bpf pflogd 90199 170346 1 0 3 0x80 sbwait pflogd 82061 247643 6216 73 3 0x1100090 kqread syslogd 6216 230858 1 0 3 0x100082 sbwait syslogd 5502 267453 1 0 3 0x100080 kqread resolvd 57352 108966 32903 77 3 0x100092 kqread dhcpleased 21962 521254 32903 77 3 0x100092 kqread dhcpleased 32903 32926 1 0 3 0x80 kqread dhcpleased 54908 134540 0 0 3 0x14200 pause smr 97762 285656 0 0 2 0x14200 zerothread 10569 118712 0 0 3 0x14200 aiodoned aiodoned 55001 312903 0 0 3 0x14200 syncer update 26718 120756 0 0 3 0x14200 cleaner cleaner 43535 17731 0 0 3 0x14200 reaper reaper 35101 220619 0 0 3 0x14200 pgdaemon pagedaemon 44 350144 0 0 3 0x14200 bored viomb 7407 360602 0 0 3 0x40014200 acpi0 acpi0 76867 70164 0 0 3 0x40014200 idle1 35410 52857 0 0 3 0x14200 bored softnet3 86449 224085 0 0 3 0x14200 bored softnet2 56846 309566 0 0 3 0x14200 bored softnet1 86605 222954 0 0 3 0x14200 bored softnet0 92206 237530 0 0 3 0x14200 bored systqmp 67534 471765 0 0 3 0x14200 bored systq 93553 463100 0 0 3 0x14200 tmoslp softclockmp 65443 482169 0 0 3 0x40014200 tmoslp softclock 11076 433757 0 0 3 0x40014200 idle0 1 355474 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 4187 (syz-executor) thread 0xffff8000371e6538 (506778) exclusive rrwlock inode r = 0 (0xfffffd806f45bf88) #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 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:169 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ufs_lookup+0x16bc sys/ufs/ufs/ufs_lookup.c:573 #7 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #8 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #9 namei+0x7aa sys/kern/vfs_lookup.c:250 #10 vn_open+0x13f sys/kern/vfs_vnops.c:140 #11 vndioctl+0xcb1 sys/dev/vnd.c:457 #12 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #13 vn_ioctl+0xf6 sys/kern/vfs_vnops.c:525 #14 sys_ioctl+0x67c #15 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #15 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #16 Xsyscall+0x128 Process 49286 (syz-executor) thread 0xffff8000371e7c00 (89544) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8359d538) #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+0xd3e sys/kern/uipc_socket.c:1090 #3 recvit+0x40a sys/kern/uipc_syscalls.c:1079 #4 sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:970 #5 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #5 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 exclusive rwlock sbufrcv r = 0 (0xffff800010fde610) #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 sblock+0xb7 sys/kern/uipc_socket2.c:549 #3 soreceive+0x295 sys/kern/uipc_socket.c:945 #4 recvit+0x40a sys/kern/uipc_syscalls.c:1079 #5 sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:970 #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 34009 (syz-executor) thread 0xffff8000ffff3bf8 (167263) exclusive rrwlock inode r = 0 (0xfffffd806bd87d60) #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 vn_read+0x6c sys/kern/vfs_vnops.c:353 #6 dofilereadv+0x230 sys/kern/sys_generic.c:252 #7 sys_preadv+0xe3 sys/kern/vfs_syscalls.c:3322 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 65019 (syz-executor) thread 0xffff80002a03ea38 (178390) exclusive rrwlock inode r = 0 (0xfffffd806bd87f80) #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 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:169 #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:3099 #10 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #10 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cd6e818) #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 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:3084 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10219 11190K 11437K 166960K 11777 0 pcb 17 12K 12K 166960K 45 0 rtable 203 6K 7K 166960K 380 0 pf 34 17K 18K 166960K 53 0 ifaddr 41 7K 7K 166960K 50 0 ifgroup 55 2K 2K 166960K 66 0 sysctl 3 0K 0K 166960K 3 0 counters 64 36K 36K 166960K 70 0 ioctlops 0 0K 4K 166960K 1502 0 iov 1 0K 12K 166960K 13 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1434 90K 91K 166960K 1594 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 16 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 93K 166960K 337 0 sigio 0 0K 0K 166960K 9 0 proc 72 91K 128K 166960K 532 0 subproc 104 6K 6K 166960K 104 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 91 6K 7K 166960K 112 0 ether_multi 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 205 917K 917K 166960K 205 0 exec 0 0K 1K 166960K 386 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 231 73K 86K 166960K 4699 0 UVM aobj 8 2K 4K 166960K 11 0 pinsyscall 42 84K 106K 166960K 1441 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 15 0 NDP 12 0K 2K 166960K 32 0 temp 44 6820K 6903K 166960K 12150 0 kqueue 13 20K 26K 166960K 49 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 120 114 0 111 3 0 3 3 0 8 2 rtentry 112 116 0 23 4 0 4 4 0 8 0 unpcb 144 156 0 135 2 0 2 2 0 8 0 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpcb 808 113 0 109 7 0 7 7 0 8 6 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 336 318 0 311 6 0 6 6 0 8 5 nd6 136 26 0 4 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 2 0 2 1 0 1 1 0 8 1 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 2 0 1 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 30 0 0 1 0 1 1 0 8 0 pfstkey 128 30 0 0 1 0 1 1 0 8 0 pfstate 376 30 0 0 3 0 3 3 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 515 0 102 29 0 29 29 0 8 1 art_table 32 517 0 102 4 0 4 4 0 8 0 art_node 16 115 0 30 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 13 0 3 1 0 1 1 0 8 0 shmpl 112 8 0 3 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1923 0 415 95 0 95 95 0 8 0 ffsino 272 1923 0 415 101 0 101 101 0 8 0 nchpl 144 2391 0 702 63 0 63 63 0 8 0 uvmvnodes 80 2184 0 0 45 0 45 45 0 8 0 vnodes 216 2184 0 0 122 0 122 122 0 8 0 namei 1024 7704 0 7703 3 1 2 2 0 8 1 percpumem 16 49 0 3 1 0 1 1 0 8 0 kstatmem 264 30 0 6 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 8991 0 8988 10 2 8 8 1 8 7 plimitpl 152 78 0 60 1 0 1 1 0 8 0 sigapl 424 646 0 596 7 0 7 7 0 8 1 futexpl 64 2901 0 2899 1 0 1 1 0 8 0 knotepl 120 63 0 0 2 0 2 2 0 8 0 kqueuepl 216 60 0 51 1 0 1 1 0 8 0 pipepl 320 163 0 136 3 0 3 3 0 8 0 fdescpl 496 627 0 596 5 0 5 5 0 8 0 filepl 152 3150 0 2895 13 0 13 13 0 8 2 lockfpl 104 92 0 88 1 0 1 1 0 8 0 lockfspl 48 37 0 34 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 309 0 295 1 0 1 1 0 8 0 zombiepl 144 597 0 596 1 0 1 1 0 8 0 processpl 1160 646 0 596 5 0 5 5 0 8 1 procpl 648 949 0 891 6 0 6 6 0 8 0 sosppl 168 8 0 8 1 0 1 1 0 8 1 sockpl 664 592 0 561 9 0 9 9 0 8 6 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 140 0 0 18 0 18 18 0 8 0 mcl2k 2048 36 0 0 5 0 5 5 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 733 0 0 46 0 46 46 0 8 0 bufpl 280 4725 0 99 331 0 331 331 0 8 0 anonpl 24 186921 0 183223 46 0 46 46 0 185 20 amapchunkpl 152 15919 0 15437 28 0 28 28 0 158 6 amappl16 200 5356 0 5326 14 3 11 14 0 8 8 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 119 0 107 1 0 1 1 0 8 0 amappl13 176 31 0 31 1 1 0 1 0 8 0 amappl12 168 1286 0 1256 4 1 3 3 0 8 1 amappl11 160 59 0 45 1 0 1 1 0 8 0 amappl10 152 27 0 26 1 0 1 1 0 8 0 amappl9 144 148 0 148 1 1 0 1 0 8 0 amappl8 136 20 0 17 1 0 1 1 0 8 0 amappl7 128 109 0 97 1 0 1 1 0 8 0 amappl6 120 186 0 185 1 0 1 1 0 8 0 amappl5 112 131 0 119 1 0 1 1 0 8 0 amappl4 104 324 0 304 1 0 1 1 0 8 0 amappl3 96 2881 0 2789 3 0 3 3 0 8 0 amappl2 88 905 0 823 3 0 3 3 0 8 0 amappl1 80 8490 0 7922 14 0 14 14 0 8 1 amappl 88 4296 0 4128 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 10 0 3 1 0 1 1 0 8 0 uaddrrnd 24 627 0 596 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 627 0 596 1 0 1 1 0 8 0 vmmpekpl 168 6598 0 6561 2 0 2 2 0 8 0 vmmpepl 168 48006 0 46165 90 0 90 90 0 357 2 vmsppl 448 626 0 596 6 1 5 5 0 8 1 rwobjpl 56 20546 0 17427 45 0 45 45 0 8 0 pdppl 4096 1261 0 1192 103 30 73 85 0 8 4 pvpl 32 14619 0 0 118 0 118 118 0 265 0 pmappl 248 626 0 596 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 433 0 35 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(fffffd806bd873d0,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806bd873c0,1) at rw_enter+0x122 rrw_enter(fffffd806bd873c0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd806026eb10,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd806026eb10,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_getcwd_common(fffffd806026eb10,fffffd805ebd3e78,0,0,200,0,16f5168bd20c658c) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd806026eb10,fffffd805ebd3e78,ffff8000371e7c00) at vn_isunder+0x56 sys/kern/vfs_vnops.c:688 unp_externalize(fffffd8062d40500,101,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1094 soreceive(ffff800010fde540,ffff8000371eda08,ffff8000371ed9b8,0,ffff8000371ed9f8,ffff8000371edb7c,ec20b3beafe0fc95) at soreceive+0xd3e sys/kern/uipc_socket.c:1090 recvit(ffff8000371e7c00,5,ffff8000371edb50,0,ffff8000371edb40) at recvit+0x40a sys/kern/uipc_syscalls.c:1079 sys_recvmmsg(ffff8000371e7c00,ffff8000371edd10,ffff8000371edc60) at sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:970 syscall(ffff8000371edd10) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371edd10) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xefd0566d8a0, count: -14 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff8359d330) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8359d330) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 syscall(ffff8000363b0c20) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000363b0c20) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70fa20a66e20, count: -7