witness: lock order reversal: 1st 0xffff8000012933e0 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffd806e036f80 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff830bd238 -> 0xffffffff8306e212 is missing lock order [2] inode (&ip->i_lock) -> [3] 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 lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock) #0 rw_enter+0x122 #1 sblock+0xb7 sys/kern/uipc_socket2.c:549 #2 sosplice+0x3f4 sys/kern/uipc_socket.c:1454 #3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1228 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 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(fffffd806e036f80,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806e036f70,1) at rw_enter+0x122 rrw_enter(fffffd806e036f70,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805f629a38,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805f629a38,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff800037213178) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff800037213178) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800001293238,fffffd806b60b700,ffff8000371f6ce8) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800001293238,fffffd806cb09800,fffffd806b60b700,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800001293238,fffffd806b60b700,ffff800037213408,0,0,0) at sosend+0xa40 sendit(ffff8000371f6ce8,5,ffff800037213580,0,ffff800037213640) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff8000371f6ce8,ffff8000372136f0,ffff800037213640) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff8000372136f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000372136f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5598e7fd0e0, count: -15 ddb{0}> show registers rdi 0 rsi 0x40000 acpi_pdirpa+0x2be71 rbp 0xffff800037212dd0 rbx 0xfffffd80042c6140 rdx 0xffff8000012a6b40 rcx 0xffff8000371f6ce8 rax 0x3ffff acpi_pdirpa+0x2be70 r8 0xffff800037212cb0 r9 0x8080808080808080 r10 0xc29caaf6e4815c14 r11 0xfff998ddba663d8 r12 0 r13 0xfffffd8003adee00 r14 0x3 r15 0xffffffff rip 0xffffffff81ac00e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800037212dc0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=106422 pid=57578 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000371f7708,0xffff800035d9ca58 process=0xffff8000372a0490 user=0xffff80003720e000, vmspace=0xfffffd806bfd0e20 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 90027 189681 22320 0 2 0 syz-executor 90027 81186 22320 0 3 0x4000080 fsleep syz-executor 99586 414015 57379 0 2 0 syz-executor 99586 423319 57379 0 3 0x4000080 fsleep syz-executor 57578 342237 82387 0 2 0x10 syz-executor *57578 106422 82387 0 7 0x4000010 syz-executor 87997 317159 93554 0 2 0 syz-executor 87997 331610 93554 0 3 0x4000080 fsleep syz-executor 5452 59217 21052 0 2 0 syz-executor 5452 5223 21052 0 3 0x4000080 fsleep syz-executor 69050 25959 74158 0 3 0x80 nanoslp syz-executor 69050 209928 74158 0 3 0x4000080 piperd syz-executor 47390 106467 81032 0 2 0x10 syz-executor 47390 125155 81032 0 2 0x4000010 syz-executor 2640 446539 0 0 3 0x14280 nfsidl nfsio 58869 104618 0 0 3 0x14280 nfsidl nfsio 96599 498671 0 0 3 0x14280 nfsidl nfsio 59495 436230 0 0 3 0x14280 nfsidl nfsio 65331 77729 0 0 3 0x14280 nfsidl nfsio 13783 209963 0 0 3 0x14280 nfsidl nfsio 55597 78605 0 0 3 0x14280 nfsidl nfsio 28580 246672 0 0 3 0x14280 nfsidl nfsio 32558 326827 0 0 3 0x14280 nfsidl nfsio 64196 422053 0 0 3 0x14280 nfsidl nfsio 8838 213530 0 0 3 0x14280 nfsidl nfsio 71134 493640 0 0 3 0x14280 nfsidl nfsio 13978 332530 0 0 3 0x14280 nfsidl nfsio 65555 271360 0 0 3 0x14280 nfsidl nfsio 93393 156558 0 0 3 0x14280 nfsidl nfsio 65465 322925 0 0 3 0x14280 nfsidl nfsio 17247 299650 0 0 3 0x14280 nfsidl nfsio 88079 342761 0 0 3 0x14280 nfsidl nfsio 2164 413582 0 0 3 0x14280 nfsidl nfsio 92728 193806 0 0 3 0x14280 nfsidl nfsio 36027 263977 1 0 3 0x100083 ttyin getty 69892 154658 0 0 3 0x14200 bored sosplice 9722 505895 22061 0 2 0x2 syz-executor 21052 479066 22061 0 3 0x82 nanoslp syz-executor 82387 370861 22061 0 3 0x82 nanoslp syz-executor 81032 157686 22061 0 2 0x2 syz-executor 22320 491126 22061 0 3 0x82 nanoslp syz-executor 93554 400464 22061 0 2 0x2 syz-executor 57379 80543 22061 0 3 0x82 nanoslp syz-executor 74158 64477 22061 0 7 0x2 syz-executor 22061 437445 97290 0 2 0x2 syz-executor 97290 345424 11814 0 3 0x10008a sigsusp ksh 11814 325981 68917 0 3 0x98 kqread sshd-session 68917 57563 85272 0 3 0x92 kqread sshd-session 85272 457215 1 0 3 0x88 kqread sshd 61726 35144 98634 74 3 0x1100092 bpf pflogd 98634 142414 1 0 3 0x80 sbwait pflogd 70657 451349 45141 73 3 0x1100090 kqread syslogd 45141 380067 1 0 3 0x100082 sbwait syslogd 11376 104448 1 0 3 0x100080 kqread resolvd 20124 342134 41221 77 3 0x100092 kqread dhcpleased 22157 374816 41221 77 3 0x100092 kqread dhcpleased 41221 212946 1 0 3 0x80 kqread dhcpleased 2244 101439 0 0 3 0x14200 bored smr 38966 188598 0 0 2 0x14200 zerothread 97406 463471 0 0 3 0x14200 aiodoned aiodoned 5320 447261 0 0 3 0x14200 syncer update 28460 302240 0 0 3 0x14200 cleaner cleaner 15021 158544 0 0 3 0x14200 reaper reaper 42293 390921 0 0 3 0x14200 pgdaemon pagedaemon 11835 380719 0 0 3 0x14200 bored viomb 26593 341283 0 0 3 0x40014200 acpi0 acpi0 65910 46435 0 0 3 0x40014200 idle1 19830 492503 0 0 3 0x14200 bored softnet3 45936 480828 0 0 3 0x14200 bored softnet2 45256 19731 0 0 3 0x14200 bored softnet1 48192 80590 0 0 3 0x14200 bored softnet0 56410 276975 0 0 3 0x14200 bored systqmp 18066 183085 0 0 3 0x14200 bored systq 51863 422085 0 0 3 0x14200 tmoslp softclockmp 78112 90887 0 0 3 0x40014200 tmoslp softclock 67435 488483 0 0 3 0x40014200 idle0 1 139297 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 57578 (syz-executor) thread 0xffff8000371f6ce8 (106422) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff835a0b68) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 unp_connect+0x26c sys/kern/uipc_usrreq.c:868 #2 uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 #3 sosend+0xa40 #4 sendit+0x721 sys/kern/uipc_syscalls.c:786 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 #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 exclusive rwlock sbufsnd r = 0 (0xffff8000012933e0) #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 sosend+0x2ff sys/kern/uipc_socket.c:681 #4 sendit+0x721 sys/kern/uipc_syscalls.c:786 #5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 11264K 12262K 166960K 12447 0 pcb 18 12K 12K 166960K 125 0 rtable 233 7K 8K 166960K 430 0 pf 36 18K 19K 166960K 84 0 ifaddr 45 8K 8K 166960K 67 0 ifgroup 55 2K 2K 166960K 88 0 sysctl 3 0K 0K 166960K 3 0 counters 64 36K 36K 166960K 92 0 ioctlops 0 0K 4K 166960K 1613 0 iov 0 0K 20K 166960K 58 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1416 89K 89K 166960K 1972 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 72 0 dirhash 12 2K 3K 166960K 30 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 97K 166960K 841 0 sigio 0 0K 0K 166960K 15 0 proc 72 91K 140K 166960K 608 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 74 0 in_multi 102 7K 7K 166960K 125 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 127 572K 572K 166960K 127 0 exec 0 0K 1K 166960K 598 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 242 73K 78K 166960K 9550 0 UVM aobj 31 2K 2K 166960K 34 0 pinsyscall 42 84K 104K 166960K 1948 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 36 0 NDP 12 0K 2K 166960K 44 0 temp 76 6828K 6894K 166960K 48067 0 kqueue 13 20K 28K 166960K 130 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 120 133 0 130 3 2 1 3 0 8 0 rtentry 112 137 0 29 4 0 4 4 0 8 0 unpcb 144 456 0 432 2 0 2 2 0 8 1 syncache 336 7 0 7 3 2 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 808 166 0 161 3 1 2 2 0 8 1 arp 120 26 0 8 1 0 1 1 0 8 0 inpcb 336 884 0 875 12 5 7 7 0 8 5 nd6 136 27 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 12 0 12 2 1 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 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 37 0 36 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 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 54 0 18 1 0 1 1 0 8 0 pfstkey 128 59 0 23 2 0 2 2 0 8 0 pfstate 376 57 0 21 5 0 5 5 0 8 0 pfrule 1344 25 0 18 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 533 0 54 31 0 31 31 0 8 1 art_table 32 535 0 54 4 0 4 4 0 8 0 art_node 16 136 0 44 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 3 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 61 0 51 1 0 1 1 0 8 0 shmpl 112 31 0 3 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 2901 0 1399 95 0 95 95 0 8 0 ffsino 272 2901 0 1399 101 0 101 101 0 8 0 nchpl 144 4137 0 2447 63 0 63 63 0 8 0 uvmvnodes 80 3353 0 0 69 0 69 69 0 8 0 vnodes 216 3353 0 0 187 0 187 187 0 8 0 namei 1024 13950 0 13949 2 1 1 2 0 8 0 percpumem 16 60 0 14 1 0 1 1 0 8 0 kstatmem 264 52 0 28 2 0 2 2 0 8 0 scsiplug 72 9 0 9 3 2 1 1 0 8 1 scxspl 216 12344 0 12344 11 10 1 8 1 8 1 plimitpl 152 211 0 194 1 0 1 1 0 8 0 sigapl 424 1170 0 1100 11 2 9 9 0 8 1 futexpl 64 11412 0 11408 1 0 1 1 0 8 0 knotepl 120 555 0 0 17 0 17 17 0 8 0 kqueuepl 216 202 0 193 1 0 1 1 0 8 0 pipepl 320 223 0 195 5 2 3 5 0 8 0 fdescpl 496 1130 0 1099 6 1 5 6 0 8 0 filepl 152 6612 0 6355 15 2 13 15 0 8 2 lockfpl 104 246 0 243 1 0 1 1 0 8 0 lockfspl 48 103 0 100 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 45 0 28 1 0 1 1 0 8 0 ucredpl 104 1100 0 1085 1 0 1 1 0 8 0 zombiepl 144 1100 0 1100 1 0 1 1 0 8 1 processpl 1160 1170 0 1100 7 1 6 6 0 8 0 procpl 648 2358 0 2281 9 1 8 8 0 8 0 srpgc 96 4 0 4 1 1 0 1 0 8 0 sosppl 168 12 0 12 3 2 1 1 0 8 1 sockpl 664 1486 0 1450 12 3 9 9 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 149 0 0 19 0 19 19 0 8 0 mcl2k 2048 31 0 0 4 0 4 4 0 8 0 mtagpl 96 31 0 0 1 0 1 1 0 8 0 mbufpl 256 237 0 0 15 0 15 15 0 8 0 bufpl 280 3907 0 101 272 0 272 272 0 8 0 anonpl 24 221913 0 216467 72 14 58 71 0 185 12 amapchunkpl 152 31378 0 30775 35 5 30 30 0 158 4 amappl16 200 5511 0 5444 39 26 13 27 0 8 6 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 120 0 108 1 0 1 1 0 8 0 amappl13 176 2 0 2 1 1 0 1 0 8 0 amappl12 168 1800 0 1768 4 1 3 3 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 11 0 10 1 0 1 1 0 8 0 amappl9 144 161 0 161 1 1 0 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 119 0 107 1 0 1 1 0 8 0 amappl6 120 167 0 166 1 0 1 1 0 8 0 amappl5 112 145 0 132 1 0 1 1 0 8 0 amappl4 104 328 0 308 1 0 1 1 0 8 0 amappl3 96 5726 0 5629 3 0 3 3 0 8 0 amappl2 88 1434 0 1349 3 0 3 3 0 8 0 amappl1 80 10733 0 10165 16 2 14 15 0 8 0 amappl 88 9100 0 8920 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 2 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 33 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1130 0 1099 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1130 0 1099 1 0 1 1 0 8 0 vmmpekpl 168 10590 0 10553 2 0 2 2 0 8 0 vmmpepl 168 77290 0 75378 105 9 96 104 0 357 5 vmsppl 448 1129 0 1099 6 2 4 5 0 8 0 rwobjpl 56 27779 0 23415 62 0 62 62 0 8 0 pdppl 4096 2267 0 2198 113 42 71 87 0 8 2 pvpl 32 19411 0 0 158 1 157 157 0 265 0 pmappl 248 1129 0 1099 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 417 0 56 11 0 11 11 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(fffffd806e036f80,9,0) at witness_checkorder+0x1047 rw_enter(fffffd806e036f70,1) at rw_enter+0x122 rrw_enter(fffffd806e036f70,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464 VOP_LOCK(fffffd805f629a38,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 vn_lock(fffffd805f629a38,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564 vfs_lookup(ffff800037213178) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 namei(ffff800037213178) at namei+0x7aa sys/kern/vfs_lookup.c:250 unp_connect(ffff800001293238,fffffd806b60b700,ffff8000371f6ce8) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868 uipc_dgram_send(ffff800001293238,fffffd806cb09800,fffffd806b60b700,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607 sosend(ffff800001293238,fffffd806b60b700,ffff800037213408,0,0,0) at sosend+0xa40 sendit(ffff8000371f6ce8,5,ffff800037213580,0,ffff800037213640) at sendit+0x721 sys/kern/uipc_syscalls.c:786 sys_sendmsg(ffff8000371f6ce8,ffff8000372136f0,ffff800037213640) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604 syscall(ffff8000372136f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000372136f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5598e7fd0e0, count: -15 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 __mp_lock(ffffffff835a0960) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835a0960) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80002a09a700) at syscall+0x2cc mi_syscall sys/sys/syscall_mi.h:155 [inline] syscall(ffff80002a09a700) at syscall+0x2cc sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78bdc0c29ef0, count: -6