witness: lock order reversal: 1st 0xffff8000015d75e8 sbufrcv (&so->so_rcv.sb_lock) 2nd 0xfffffd8073afb118 inode (&ip->i_lock) lock order [1] sbufrcv (&so->so_rcv.sb_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff83331184 -> 0xffffffff8337ffd2 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:878 #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:531 #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:765 #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(fffffd8073afb118,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd8073afb100,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd8073afb100,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd805eae4550,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd805eae4550,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd805eae4550,fffffd8068e04b30,0,0,200,0,7c3ca2fb07c01d62) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd805eae4550,fffffd8068e04b30,ffff800037bebca8) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd806ed0e600,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090 soreceive(ffff8000015d74f8,ffff80003c457898,ffff80003c457848,0,ffff80003c457880,ffff80003c457a0c,f57fa9cec4b4e2aa) at soreceive+0xc24 sys/kern/uipc_socket.c:1017 recvit(ffff800037bebca8,5,ffff80003c4579e0,0,ffff80003c457a90) at recvit+0x40b sys/kern/uipc_syscalls.c:1078 sys_recvmsg(ffff800037bebca8,ffff80003c457b40,ffff80003c457a90) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 syscall(ffff80003c457b40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c457b40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x86ead6861d0, count: -14 ddb{1}> show registers rdi 0 rsi 0x80000 acpi_pdirpa+0x6be71 rbp 0xffff80003c457330 rbx 0 rdx 0xffff80000147f140 rcx 0xffff800037bebca8 rax 0x7ffff acpi_pdirpa+0x6be70 r8 0xffff80003c457210 r9 0x8080808080808080 r10 0x9bb602136614beb6 r11 0x1bce8fe67c37704d r12 0xfffffd8003f45880 r13 0xfffffd800472ce88 r14 0x3 r15 0xffffffff834145c3 substchar+0x7bc8 rip 0xffffffff82bb41e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c457320 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=364245 pid=77708 tcnt=2 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=0xffff800037beb248,0xffff800037bea560 process=0xffff8000fffeeb68 user=0xffff80003c452000, vmspace=0xfffffd8064dd29b0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 86651 461927 73628 0 7 0 syz-executor 86651 370348 73628 0 2 0x4000000 syz-executor 43242 126228 7896 0 2 0 syz-executor 43242 186933 7896 0 3 0x4000080 fsleep syz-executor 43242 295076 7896 0 3 0x4000080 fsleep syz-executor 70159 312555 77792 0 2 0x2 arp 77708 418378 2679 0 2 0x1000000 syz-executor *77708 364245 2679 0 7 0x5000000 syz-executor 77792 68706 85040 0 3 0x10008a sigsusp sh 46106 223954 80898 0 2 0 syz-executor 46106 273120 80898 0 3 0x4000080 fsleep syz-executor 47977 300972 12019 0 3 0x80 nanoslp syz-executor 47977 160534 12019 0 3 0x4000080 kqsel syz-executor 47977 278747 12019 0 3 0x4000080 fsleep syz-executor 47977 51938 12019 0 3 0x4000080 fsleep syz-executor 85040 266119 57905 0 3 0x82 wait syz-executor 77281 48965 39807 0 3 0x80 nanoslp syz-executor 77281 42579 39807 0 3 0x4000080 pppxread syz-executor 77281 193338 39807 0 3 0x4000080 fsleep syz-executor 22004 339699 0 0 3 0x14200 acct acct 7896 437148 57905 0 3 0x82 nanoslp syz-executor 73628 79830 57905 0 3 0x82 nanoslp syz-executor 39807 473737 57905 0 3 0x82 nanoslp syz-executor 12019 171972 57905 0 3 0x82 nanoslp syz-executor 83205 385556 57905 0 3 0x82 nanoslp syz-executor 2679 470908 57905 0 3 0x82 nanoslp syz-executor 80898 117686 57905 0 3 0x82 nanoslp syz-executor 57905 118771 80277 0 3 0x82 kqread syz-executor 80277 438002 49076 0 3 0x10008a sigsusp ksh 49076 459893 17374 0 3 0x98 kqread sshd-session 17374 289514 33714 0 3 0x92 kqread sshd-session 47781 357867 1 0 3 0x100083 ttyin getty 33714 27488 1 0 3 0x88 kqread sshd 42935 198621 92454 74 3 0x1100092 bpf pflogd 92454 19742 1 0 3 0x80 sbwait pflogd 59257 224945 95451 73 3 0x1100090 kqread syslogd 95451 508773 1 0 3 0x100082 sbwait syslogd 49140 246 1 0 3 0x100080 kqread resolvd 70278 290870 52501 77 3 0x100092 kqread dhcpleased 46610 280277 52501 77 3 0x100092 kqread dhcpleased 52501 336270 1 0 3 0x80 kqread dhcpleased 75060 374123 0 0 3 0x14200 pause smr 56012 259622 0 0 2 0x14200 zerothread 31300 56219 0 0 3 0x14200 aiodoned aiodoned 45791 185814 0 0 3 0x14200 syncer update 38623 491972 0 0 3 0x14200 cleaner cleaner 90840 174324 0 0 3 0x14200 reaper reaper 73475 325769 0 0 3 0x14200 pgdaemon pagedaemon 75683 110954 0 0 3 0x14200 bored viomb 57730 105058 0 0 3 0x40014200 acpi0 acpi0 70751 152650 0 0 3 0x40014200 idle1 97687 306740 0 0 3 0x14200 bored softnet1 62893 8913 0 0 2 0x14200 softnet0 7028 378069 0 0 3 0x14200 smrbar systqmp 23054 44623 0 0 3 0x14200 bored systq 19477 315552 0 0 3 0x14200 tmoslp softclockmp 11053 392302 0 0 3 0x40014200 tmoslp softclock 93139 476196 0 0 3 0x40014200 idle0 1 74988 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 77708 (syz-executor) thread 0xffff800037bebca8 (364245) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a0a408) #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:1017 #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:765 #6 Xsyscall+0x128 exclusive rwlock sbufrcv r = 0 (0xffff8000015d75e8) #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:878 #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:765 #7 Xsyscall+0x128 Process 7028 (systqmp) thread 0xffff8000ffffe298 (378069) shared rwlock systqmp r = 0 (0xffffffff83803458) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10238 11167K 12411K 166960K 12819 0 pcb 18 12K 13K 166960K 147 0 rtable 184 8K 10K 166960K 459 0 pf 33 17K 19K 166960K 112 0 ifaddr 34 5K 8K 166960K 88 0 ifgroup 51 2K 2K 166960K 143 0 sysctl 3 1K 9K 166960K 10 0 counters 66 36K 38K 166960K 156 0 ioctlops 0 0K 4K 166960K 1643 0 iov 0 0K 24K 166960K 50 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1430 90K 90K 166960K 2076 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 63 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 240K 166960K 884 0 sigio 0 0K 0K 166960K 7 0 proc 72 115K 164K 166960K 618 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 165 0 in_multi 67 5K 7K 166960K 135 0 ether_multi 1 0K 0K 166960K 11 0 mrt 2 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 501 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 254 161K 173K 166960K 9453 0 UVM aobj 23 2K 4K 166960K 26 0 pinsyscall 45 90K 106K 166960K 2011 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 44 0 NDP 11 0K 2K 166960K 57 0 temp 57 8670K 8741K 166960K 27358 0 kqueue 13 20K 28K 166960K 154 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 83 0 80 1 0 1 1 0 8 0 rtentry 176 139 0 66 6 0 6 6 0 8 0 unpcb 144 338 0 317 2 0 2 2 0 8 1 syncache 336 7 0 7 2 1 1 1 0 8 1 tcpcb 736 274 0 269 10 3 7 7 0 8 6 arp 136 22 0 9 1 0 1 1 0 8 0 inpcb 328 751 0 740 9 2 7 7 0 8 6 nd6 152 29 0 11 2 0 2 2 0 8 0 pkpcb 40 2 0 1 2 1 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 33 0 33 2 1 1 1 0 8 1 pppxif 1504 7 0 7 2 1 1 1 0 8 1 pffrag 232 7 0 1 1 0 1 1 0 482 0 pffrnode 88 7 0 1 1 0 1 1 0 8 0 pffrent 40 12 0 6 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 1 0 1 1 1 0 1 0 8 0 pfstitem 24 55 0 5 1 0 1 1 0 8 0 pfstkey 128 55 0 5 2 0 2 2 0 8 0 pfstate 448 55 0 5 6 0 6 6 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 643 0 313 31 2 29 31 0 8 3 art_table 40 645 0 313 5 0 5 5 0 8 0 art_node 32 139 0 73 1 0 1 1 0 8 0 sysvmsgpl 40 49 0 47 2 1 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 23 0 3 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2916 0 1404 96 0 96 96 0 8 0 ffsino 296 2916 0 1404 118 0 118 118 0 8 0 nchpl 144 4135 0 3598 64 33 31 64 0 8 8 rtmask 32 6 0 6 2 1 1 1 0 8 1 vnodes 216 3429 0 0 191 0 191 191 0 8 0 namei 1024 14281 0 14281 1 0 1 1 0 8 1 percpumem 16 93 0 45 1 0 1 1 0 8 0 kstatmem 264 86 0 60 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 14460 0 14460 10 2 8 8 1 8 8 plimitpl 152 193 0 174 1 0 1 1 0 8 0 sigapl 424 1162 0 1112 7 1 6 7 0 8 0 knotepl 120 404 0 0 13 0 13 13 0 8 0 kqueuepl 224 345 0 334 5 2 3 3 0 8 2 pipepl 344 173 0 146 3 0 3 3 0 8 0 fdescpl 528 1144 0 1111 3 0 3 3 0 8 0 filepl 160 6671 0 6440 18 0 18 18 0 8 8 lockfpl 104 415 0 411 2 0 2 2 0 8 1 lockfspl 48 128 0 125 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 46 0 29 1 0 1 1 0 8 0 ucredpl 104 949 0 935 1 0 1 1 0 8 0 zombiepl 144 1113 0 1112 2 1 1 1 0 8 0 processpl 1232 1162 0 1112 5 1 4 5 0 8 0 procpl 664 2381 0 2321 6 0 6 6 0 8 0 sosppl 176 1 0 1 1 1 0 1 0 8 0 sockpl 752 1196 0 1159 14 3 11 11 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 37 0 0 5 0 5 5 0 8 0 mtagpl 96 123 0 0 3 0 3 3 0 8 0 mbufpl 256 295 0 0 19 0 19 19 0 8 0 bufpl 280 4688 0 136 326 0 326 326 0 8 0 anonpl 32 7446 0 0 61 0 61 61 0 246 0 amapchunkpl 152 32020 0 31514 37 8 29 29 0 158 8 amappl16 200 2959 0 2924 14 9 5 11 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 22 0 22 1 1 0 1 0 8 0 amappl13 176 434 0 432 1 0 1 1 0 8 0 amappl12 168 1518 0 1474 3 0 3 3 0 8 0 amappl11 160 12 0 11 1 0 1 1 0 8 0 amappl10 152 48 0 33 1 0 1 1 0 8 0 amappl9 144 276 0 276 1 1 0 1 0 8 0 amappl8 136 54 0 52 1 0 1 1 0 8 0 amappl7 128 86 0 84 1 0 1 1 0 8 0 amappl6 120 286 0 271 1 0 1 1 0 8 0 amappl5 112 80 0 69 1 0 1 1 0 8 0 amappl4 104 429 0 398 1 0 1 1 0 8 0 amappl3 96 5429 0 5332 4 1 3 3 0 8 0 amappl2 88 1291 0 1213 2 0 2 2 0 8 0 amappl1 80 13177 0 12561 15 1 14 15 0 8 0 amappl 88 8583 0 8412 5 0 5 5 0 92 0 uvmvnodes 80 130 0 0 3 0 3 3 0 8 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 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 25 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1144 0 1111 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1144 0 1111 1 0 1 1 0 8 0 vmmpekpl 168 10946 0 10911 3 0 3 3 0 8 0 vmmpepl 168 79357 0 77345 100 6 94 94 0 357 4 vmsppl 488 1143 0 1111 6 1 5 5 0 8 0 rwobjpl 80 22986 0 21857 25 0 25 25 0 8 0 pdppl 4096 2295 0 2222 107 34 73 87 0 8 0 pvpl 32 13874 0 0 112 0 112 112 0 265 0 pmappl 256 1143 0 1111 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 308 0 42 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(ffffffff8380aff0) 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(ffffffff83a0a200) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a0a200) at __mp_lock+0x192 sys/kern/kern_lock.c:165 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 end of kernel end trace frame: 0x71d380b6cbe0, count: -7 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(fffffd8073afb118,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1 rw_do_enter_write(fffffd8073afb100,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234 rrw_enter(fffffd8073afb100,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 VOP_LOCK(fffffd805eae4550,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 vn_lock(fffffd805eae4550,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570 vfs_getcwd_common(fffffd805eae4550,fffffd8068e04b30,0,0,200,0,7c3ca2fb07c01d62) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287 vn_isunder(fffffd805eae4550,fffffd8068e04b30,ffff800037bebca8) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694 unp_externalize(fffffd806ed0e600,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090 soreceive(ffff8000015d74f8,ffff80003c457898,ffff80003c457848,0,ffff80003c457880,ffff80003c457a0c,f57fa9cec4b4e2aa) at soreceive+0xc24 sys/kern/uipc_socket.c:1017 recvit(ffff800037bebca8,5,ffff80003c4579e0,0,ffff80003c457a90) at recvit+0x40b sys/kern/uipc_syscalls.c:1078 sys_recvmsg(ffff800037bebca8,ffff80003c457b40,ffff80003c457a90) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 syscall(ffff80003c457b40) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c457b40) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x86ead6861d0, count: -14