witness: lock order reversal: 1st 0xffff8000015a9398 sbufsnd (&so->so_snd.sb_lock) 2nd 0xfffffb006d0e9560 inode (&ip->i_lock) lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff8351f5d2 -> 0xffffffff83494977 is missing lock order [2] inode (&ip->i_lock) -> [3] 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:791 #12 Xsyscall+0x128 lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock) #0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 #1 sblock+0xb6 sys/kern/uipc_socket2.c:536 #2 sosplice+0x32b sys/kern/uipc_socket.c:1352 #3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1226 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 #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}> show kasan No such command ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 witness_checkorder(fffffb006d0e9560,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffb006d0e9548,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffb006d0e9548,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffb006213b608,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 vn_lock(fffffb006213b608,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:576 vfs_lookup(ffff80002a21fea0) at vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 namei(ffff80002a21fea0) at namei+0x7c5 sys/kern/vfs_lookup.c:250 unp_connect(ffff8000015a91b0,fffffb00627f3200,ffff80002a245a08) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff8000015a91b0,fffffb00627f3800,fffffb00627f3200,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff8000015a91b0,fffffb00627f3200,ffff80002a220128,0,0,0) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80002a245a08,3,ffff80002a220220,0,ffff80002a2202d0) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendto(ffff80002a245a08,ffff80002a220380,ffff80002a2202d0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:563 syscall(ffff80002a220380) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a220380) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x83169c6d220, count: -15 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a21fb10 rbx 0 rdx 0 rcx 0xffff80002a245a08 rax 0xffffffff83958ff0 cpu_info_full_primary+0x1ff0 r8 0xffff80002a21f9f0 r9 0x8080808080808080 r10 0x7d098c244fdbf2dd r11 0xd7fc9a67e8584aca r12 0xfffffb00040cd980 r13 0xfffffb00048b50a8 r14 0x3 r15 0xffffffff835305d4 substchar+0xacc9 rip 0xffffffff827fe5f5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a21fb00 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=164156 pid=16720 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2447e0,0xffff80002a244d20 process=0xffff80003c3db040 user=0xffff80002a21b000, vmspace=0xfffffb006fba0990 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 84946 442879 70467 0 2 0 0 syz-executor 84946 139264 70467 0 2 0 0x4000080 syz-executor 84946 198393 70467 0 3 0 0x4000080 fsleep syz-executor 84946 36894 70467 0 3 0 0x4000080 fsleep syz-executor 98692 291959 11003 0 2 0 0 syz-executor 98692 426546 11003 0 7 0 0x4000000 syz-executor 16720 522987 23721 0 2 0 0 syz-executor *16720 164156 23721 0 7 0 0x4000000 syz-executor 16720 169792 23721 0 3 0 0x4000080 fsleep syz-executor 27324 227838 48099 0 3 0 0x80 nanoslp syz-executor 27324 22265 48099 0 3 0 0x4000000 biowait syz-executor 27324 496362 48099 0 3 0 0x4000080 fsleep syz-executor 58017 231272 74466 0 3 0 0x80 nanoslp syz-executor 58017 391153 74466 0 3 0 0x4000080 netcon syz-executor 58017 509029 74466 0 3 0 0x4000080 fsleep syz-executor 98654 156736 81224 0 3 0x10 0x80 nanoslp syz-executor 98654 383002 81224 0 3 0x10 0x4000080 kqread syz-executor 98654 408752 81224 0 3 0x10 0x4000080 fsleep syz-executor 79043 394534 49762 0 4 0x40000000 0x8000000 syz-executor 79043 432212 49762 0 4 0x40000000 0xc000000 syz-executor 80745 421466 0 0 3 0x14000 0x200 acct acct 9408 239737 1 0 3 0 0x80 nanoslp init 70467 240451 27911 0 3 0x2 0x80 nanoslp syz-executor 11003 476560 27911 0 3 0x2 0x80 nanoslp syz-executor 81224 484642 27911 0 3 0x2 0x80 nanoslp syz-executor 48099 387722 27911 0 3 0x2 0x80 nanoslp syz-executor 23721 379728 27911 0 3 0x2 0x80 nanoslp syz-executor 3419 251503 27911 0 3 0x2 0x80 nanoslp syz-executor 49762 58425 27911 0 3 0x2 0x80 nanoslp syz-executor 74466 452197 27911 0 3 0x2 0x80 nanoslp syz-executor 27911 231121 1 0 3 0x2 0x80 kqread syz-executor 21541 286367 0 0 3 0x14000 0x200 bored smr 38111 305833 0 0 2 0x14000 0x200 zerothread 30809 160882 0 0 3 0x14000 0x200 aiodoned aiodoned 23703 232039 0 0 3 0x14000 0x200 syncer update 6033 466347 0 0 3 0x14000 0x200 cleaner cleaner 5509 517460 0 0 3 0x14000 0x200 reaper reaper 99434 105196 0 0 3 0x14000 0x200 pgdaemon pagedaemon 53258 12295 0 0 3 0x14000 0x200 bored viomb 10420 314818 0 0 3 0x14000 0x40000200 acpi0 acpi0 11217 57914 0 0 3 0x14000 0x40000200 idle1 37960 220305 0 0 3 0x14000 0x200 bored softnet1 62957 308200 0 0 3 0x14000 0x200 bored softnet0 47872 325552 0 0 3 0x14000 0x200 smrbar systqmp 93915 171762 0 0 3 0x14000 0x200 bored systq 8415 148136 0 0 3 0x14000 0x200 tmoslp softclockmp 91264 110467 0 0 3 0x14000 0x40000200 tmoslp softclock 70190 415718 0 0 3 0x14000 0x40000200 idle0 1 71401 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 16720 (syz-executor) thread 0xffff80002a245a08 (164156) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a6eb80) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 unp_connect+0x28c sys/kern/uipc_usrreq.c:872 #2 uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 #3 sosend+0x804 sys/kern/uipc_socket.c:-1 #4 sendit+0x5a5 sys/kern/uipc_syscalls.c:785 #5 sys_sendto+0x8d sys/kern/uipc_syscalls.c:563 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 #7 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff8000015a9398) #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 sosend+0x2e9 sys/kern/uipc_socket.c:639 #4 sendit+0x5a5 sys/kern/uipc_syscalls.c:785 #5 sys_sendto+0x8d sys/kern/uipc_syscalls.c:563 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 #7 Xsyscall+0x128 Process 27324 (syz-executor) thread 0xffff80002a245770 (22265) exclusive rrwlock inode r = 0 (0xfffffb006edb0498) #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:791 #9 Xsyscall+0x128 Process 47872 (systqmp) thread 0xffff800045ffe298 (325552) shared rwlock systqmp r = 0 (0xffffffff839d9eb8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11061 12161K 12417K 166960K 12851 0 pcb 22 14K 16K 166960K 248 0 rtable 151 5K 7K 166960K 411 0 pf 31 17K 25K 166960K 108 0 ifaddr 31 5K 7K 166960K 63 0 ifgroup 43 2K 2K 166960K 83 0 sysctl 1 1K 9K 166960K 10 0 counters 64 36K 37K 166960K 98 0 ioctlops 0 0K 4K 166960K 1566 0 iov 0 0K 16K 166960K 8 0 mount 1 1K 1K 166960K 1 0 log 3 4K 4K 166960K 7 0 vnodes 1349 85K 86K 166960K 1849 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 85 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 65K 93K 166960K 483 0 sigio 0 0K 0K 166960K 10 0 proc 12 17K 164K 166960K 611 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 52 0 in_multi 66 4K 6K 166960K 128 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 19 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 476 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 153 79K 161K 166960K 6097 0 UVM aobj 117 3K 3K 166960K 117 0 pinsyscall 19 38K 104K 166960K 1700 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 9 0 NDP 9 0K 2K 166960K 39 0 temp 35 9118K 9155K 166960K 15554 0 kqueue 3 6K 28K 166960K 97 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 51 0 51 1 0 1 1 0 8 1 rtentry 176 129 0 64 6 0 6 6 0 8 0 unpcb 144 227 0 225 3 0 3 3 0 8 2 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 80 0 77 1 0 1 1 0 8 0 arp 136 20 0 8 1 0 1 1 0 8 0 inpcb 328 478 0 468 6 0 6 6 0 8 5 nd6 152 30 0 14 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 10 0 10 1 0 1 1 0 8 1 pppxif 1576 2 0 2 1 0 1 1 0 8 1 pfstscr 40 3 0 3 2 1 1 1 0 8 1 pffrag 232 8 0 1 1 0 1 1 0 482 0 pffrnode 88 8 0 1 1 0 1 1 0 8 0 pffrent 40 23 0 16 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 pfanchor 1288 6 0 4 1 0 1 1 0 8 0 pfstitem 24 43 0 0 1 0 1 1 0 8 0 pfstkey 128 46 0 3 2 0 2 2 0 8 0 pfstate 448 44 0 2 5 0 5 5 0 8 0 pfrule 1360 22 0 16 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 256 573 0 236 31 0 31 31 0 8 5 art_table 40 574 0 236 5 0 5 5 0 8 0 art_node 32 129 0 61 1 0 1 1 0 8 0 semapl 72 81 0 71 1 0 1 1 0 8 0 shmpl 112 114 0 0 4 0 4 4 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2256 0 788 93 0 93 93 0 8 0 ffsino 296 2256 0 788 114 0 114 114 0 8 0 nchpl 144 2888 0 1180 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 2661 0 0 148 0 148 148 0 8 0 namei 1024 9522 0 9521 2 0 2 2 0 8 1 percpumem 16 65 0 17 1 0 1 1 0 8 0 kstatmem 264 45 0 24 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 11674 0 11673 11 3 8 8 1 8 7 plimitpl 152 70 0 61 1 0 1 1 0 8 0 sigapl 424 810 0 773 7 1 6 7 0 8 0 knotepl 120 313 0 0 10 0 10 10 0 8 0 kqueuepl 224 180 0 177 5 0 5 5 0 8 4 pipepl 344 158 0 131 3 0 3 3 0 8 0 fdescpl 528 793 0 773 3 0 3 3 0 8 0 filepl 160 4190 0 4009 13 0 13 13 0 8 4 lockfpl 104 177 0 175 1 0 1 1 0 8 0 lockfspl 48 81 0 79 1 0 1 1 0 8 0 sessionpl 144 37 0 35 1 0 1 1 0 8 0 pgrppl 48 49 0 38 1 0 1 1 0 8 0 ucredpl 104 686 0 681 1 0 1 1 0 8 0 zombiepl 144 774 0 773 1 0 1 1 0 8 0 processpl 1232 810 0 773 5 0 5 5 0 8 0 procpl 664 1378 0 1328 6 0 6 6 0 8 1 sosppl 176 2 0 2 1 1 0 1 0 8 0 sockpl 752 767 0 755 8 0 8 8 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 136 0 0 17 0 17 17 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mextrefs 64 17 0 0 1 0 1 1 0 8 0 mtagpl 96 69 0 0 2 0 2 2 0 8 0 mbufpl 256 222 0 0 14 0 14 14 0 8 0 bufpl 272 4962 0 107 324 0 324 324 0 8 0 anonpl 32 5536 0 0 45 0 45 45 0 247 0 amapchunkpl 152 18299 0 17847 26 0 26 26 0 158 7 amappl16 200 847 0 823 3 0 3 3 0 8 1 amappl15 192 5 0 5 1 0 1 1 0 8 1 amappl14 184 449 0 449 1 0 1 1 0 8 1 amappl13 176 128 0 128 1 0 1 1 0 8 1 amappl12 168 1062 0 1044 2 0 2 2 0 8 0 amappl11 160 1 0 1 1 1 0 1 0 8 0 amappl10 152 60 0 60 1 0 1 1 0 8 1 amappl9 144 272 0 272 1 1 0 1 0 8 0 amappl8 136 106 0 105 1 0 1 1 0 8 0 amappl7 128 168 0 166 1 0 1 1 0 8 0 amappl6 120 163 0 163 1 0 1 1 0 8 1 amappl5 112 98 0 97 1 0 1 1 0 8 0 amappl4 104 311 0 309 1 0 1 1 0 8 0 amappl3 96 3371 0 3292 3 0 3 3 0 8 0 amappl2 88 912 0 887 2 0 2 2 0 8 0 amappl1 80 12128 0 12031 15 2 13 15 0 8 8 amappl 88 5213 0 5070 5 0 5 5 0 92 0 uvmvnodes 80 107 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 128 254 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 72 116 0 0 3 0 3 3 0 8 0 uaddrrnd 24 793 0 773 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 793 0 773 1 0 1 1 0 8 0 vmmpekpl 168 8254 0 8219 3 0 3 3 0 8 0 vmmpepl 168 56841 0 55954 87 0 87 87 0 357 48 vmsppl 488 792 0 773 5 1 4 5 0 8 0 rwobjpl 80 17274 0 16734 24 1 23 23 0 8 3 pdppl 4096 1593 0 1546 99 52 47 85 0 8 0 pvpl 32 12564 0 0 103 1 102 102 0 265 0 pmappl 256 792 0 773 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 607 0 56 16 0 16 16 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:438 witness_checkorder(fffffb006d0e9560,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffb006d0e9548,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffb006d0e9548,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffb006213b608,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 vn_lock(fffffb006213b608,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:576 vfs_lookup(ffff80002a21fea0) at vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 namei(ffff80002a21fea0) at namei+0x7c5 sys/kern/vfs_lookup.c:250 unp_connect(ffff8000015a91b0,fffffb00627f3200,ffff80002a245a08) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872 uipc_dgram_send(ffff8000015a91b0,fffffb00627f3800,fffffb00627f3200,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609 sosend(ffff8000015a91b0,fffffb00627f3200,ffff80002a220128,0,0,0) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80002a245a08,3,ffff80002a220220,0,ffff80002a2202d0) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendto(ffff80002a245a08,ffff80002a220380,ffff80002a2202d0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:563 syscall(ffff80002a220380) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a220380) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x83169c6d220, count: -15 ddb{0}>