panic: pool_do_get: mbufpl free list modified: page 0xfffffd806c866000; item addr 0xfffffd806c866600; offset 0x0=0x0 != 0xba719e8573625c6f Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 322512 19723 0 0 0 1 syz-executor.1 *211680 19723 0 0 0x4000000 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff824a09ce) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff82933910,2,ffff8000230f48b8) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff82933910,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 ip_fragment(fffffd806c866d00,ffff80000017c2a8,5b4) at ip_fragment+0x13a sys/netinet/ip_output.c:680 ip_output(fffffd806c866d00,0,fffffd806f66be50,0,0,fffffd806f66bde0) at ip_output+0xfd7 sys/netinet/ip_output.c:499 udp_output(fffffd806f66bde0,fffffd806c866d00,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017 sosend(fffffd806c913330,0,ffff8000230f4cc0,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020eb4018,7,ffff8000230f4da0,0,ffff8000230f4e80) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020eb4018,ffff8000230f4e38,ffff8000230f4e80) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff8000230f4f00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230f4f00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4cf0dd01560, count: 2 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic pool_do_get: mbufpl free list modified: page 0xfffffd806c866000; item addr 0xfffffd806c866600; offset 0x0=0x0 != 0xba719e8573625c6f ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff824a09ce) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff82933910,2,ffff8000230f48b8) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff82933910,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 ip_fragment(fffffd806c866d00,ffff80000017c2a8,5b4) at ip_fragment+0x13a sys/netinet/ip_output.c:680 ip_output(fffffd806c866d00,0,fffffd806f66be50,0,0,fffffd806f66bde0) at ip_output+0xfd7 sys/netinet/ip_output.c:499 udp_output(fffffd806f66bde0,fffffd806c866d00,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017 sosend(fffffd806c913330,0,ffff8000230f4cc0,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020eb4018,7,ffff8000230f4da0,0,ffff8000230f4e80) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020eb4018,ffff8000230f4e38,ffff8000230f4e80) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff8000230f4f00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230f4f00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4cf0dd01560, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000230f4700 rbx 0xffff8000230f47b0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff8000230f46c0 r9 0xffffffff8108ddff kprintf+0x16f r10 0x1 r11 0xcbc5428cad9d41aa r12 0x3000000008 r13 0xffff8000230f4710 r14 0x100 r15 0x1 rip 0xffffffff822b91e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000230f46f0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=211680 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020eb5650,0xffffffff828cde18 process=0xffff800020eb63f8 user=0xffff8000230ef000, vmspace=0xfffffd807effe730 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 19723 322512 71489 0 7 0 syz-executor.1 *19723 211680 71489 0 7 0x4000000 syz-executor.1 72788 221673 0 0 3 0x14200 bored sosplice 71489 339674 15784 0 3 0x82 nanosleep syz-executor.1 24715 176590 15784 0 2 0x2 syz-executor.0 15784 518760 75097 0 3 0x82 thrsleep syz-fuzzer 15784 118515 75097 0 3 0x4000082 nanosleep syz-fuzzer 15784 213431 75097 0 3 0x4000082 thrsleep syz-fuzzer 15784 113598 75097 0 3 0x4000082 thrsleep syz-fuzzer 15784 169382 75097 0 3 0x4000082 thrsleep syz-fuzzer 15784 7649 75097 0 3 0x4000082 thrsleep syz-fuzzer 15784 20385 75097 0 3 0x4000082 kqread syz-fuzzer 15784 323816 75097 0 3 0x4000082 thrsleep syz-fuzzer 75097 310106 73575 0 3 0x10008a pause ksh 73575 257028 78153 0 3 0x92 select sshd 18698 508448 1 0 3 0x100083 ttyin getty 78153 296765 1 0 3 0x80 select sshd 89625 27100 93760 74 3 0x100092 bpf pflogd 93760 345347 1 0 3 0x80 netio pflogd 60400 387854 57657 73 3 0x100090 kqread syslogd 57657 61891 1 0 3 0x100082 netio syslogd 37965 381196 1 77 3 0x100090 poll dhclient 90040 307064 1 0 3 0x80 poll dhclient 80253 259162 0 0 3 0x14200 bored smr 78892 230263 0 0 3 0x14200 pgzero zerothread 87121 281089 0 0 3 0x14200 aiodoned aiodoned 74528 351383 0 0 3 0x14200 syncer update 45794 182532 0 0 3 0x14200 cleaner cleaner 95360 318270 0 0 3 0x14200 reaper reaper 7809 284060 0 0 3 0x14200 pgdaemon pagedaemon 55098 181461 0 0 3 0x14200 bored crynlk 81986 120217 0 0 3 0x14200 bored crypto 91902 146839 0 0 3 0x40014200 acpi0 acpi0 31167 171876 0 0 3 0x40014200 idle1 85061 26029 0 0 3 0x14200 bored softnet 13678 299555 0 0 3 0x14200 bored systqmp 37326 310466 0 0 3 0x14200 bored systq 59127 242517 0 0 3 0x40014200 bored softclock 16632 132159 0 0 3 0x40014200 idle0 1 239179 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex mbufpl r = 0 (0xffffffff82933920) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:578 #4 m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 #5 ip_fragment+0x13a sys/netinet/ip_output.c:680 #6 ip_output+0xfd7 sys/netinet/ip_output.c:499 #7 udp_output+0x5af sys/netinet/udp_usrreq.c:1017 #8 sosend+0x671 sys/kern/uipc_socket.c:555 #9 sendit+0x52b sys/kern/uipc_syscalls.c:657 #10 sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 #11 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #12 Xsyscall+0x128 Process 19723 (syz-executor.1) thread 0xffff800020eb4018 (211680) exclusive rwlock netlock r = 0 (0xffffffff827713e0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 solock+0x5a sys/kern/uipc_socket2.c:282 #2 sosend+0x559 sys/kern/uipc_socket.c:543 #3 sendit+0x52b sys/kern/uipc_syscalls.c:657 #4 sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #6 Xsyscall+0x128 exclusive mutex mbufpl r = 0 (0xffffffff82933920) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:578 #4 m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 #5 ip_fragment+0x13a sys/netinet/ip_output.c:680 #6 ip_output+0xfd7 sys/netinet/ip_output.c:499 #7 udp_output+0x5af sys/netinet/udp_usrreq.c:1017 #8 sosend+0x671 sys/kern/uipc_socket.c:555 #9 sendit+0x52b sys/kern/uipc_syscalls.c:657 #10 sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 #11 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #12 Xsyscall+0x128 Process 24715 (syz-executor.0) thread 0xffff800020eb5b40 (176590) exclusive rrwlock inode r = 0 (0xfffffd807e7b72b8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358 #5 ffs_inode_alloc+0x1e2 sys/ufs/ffs/ffs_alloc.c:394 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807e7b7b38) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3036 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9468 6396K 6655K 78643K 10649 0 pcb 13 8K 8K 78643K 25 0 rtable 113 3K 3K 78643K 213 0 ifaddr 45 10K 11K 78643K 51 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1479 0 iov 0 0K 0K 78643K 9 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 77K 77K 78643K 1246 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 42 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 124 0 sigio 0 0K 0K 78643K 8 0 proc 59 63K 83K 78643K 448 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 13 0 in_multi 37 2K 2K 78643K 44 0 ether_multi 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 1K 78643K 210 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 174 28K 28K 78643K 1377 0 UVM aobj 5 2K 2K 78643K 5 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 11 0 NDP 6 0K 0K 78643K 12 0 temp 75 3870K 3934K 78643K 2241 0 kqueue 3 4K 4K 78643K 3 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 88 19 0 17 1 0 1 1 0 8 0 rtentry 112 52 0 4 2 0 2 2 0 8 0 unpcb 120 99 0 88 1 0 1 1 0 8 0 syncache 272 4 0 4 1 1 0 1 0 8 0 tcpqe 32 360 0 360 1 0 1 1 0 8 1 tcpcb 592 36 0 30 2 0 2 2 0 8 1 inpcb 296 131 0 123 2 0 2 2 0 8 1 nd6 48 11 0 2 1 0 1 1 0 8 0 pkpcb 40 5 0 4 1 0 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 23 0 0 1 0 1 1 0 8 0 pfstkey 112 23 0 0 1 0 1 1 0 8 0 pfstate 328 23 0 0 2 0 2 2 0 8 0 pfrule 1360 23 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 211 0 13 13 0 13 13 0 8 0 art_table 32 212 0 13 2 0 2 2 0 8 0 art_node 16 51 0 8 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 0 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 40 0 30 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1528 0 125 88 0 88 88 0 8 0 ffsino 272 1528 0 125 94 0 94 94 0 8 0 nchpl 144 1924 0 317 60 0 60 60 0 8 0 uvmvnodes 72 1593 0 0 29 0 29 29 0 8 0 vnodes 208 1593 0 0 84 0 84 84 0 8 0 namei 1024 4913 0 4912 1 0 1 1 0 8 0 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 200 5456 0 5456 8 1 7 7 0 8 7 plimitpl 152 15 0 7 1 0 1 1 0 8 0 sigapl 424 340 0 308 4 0 4 4 0 8 0 futexpl 56 1382 0 1382 1 0 1 1 0 8 1 knotepl 112 62 0 42 1 0 1 1 0 8 0 kqueuepl 152 92 0 90 1 0 1 1 0 8 0 pipepl 304 86 0 75 2 0 2 2 0 8 1 fdescpl 496 324 0 308 3 0 3 3 0 8 0 filepl 152 1669 0 1564 5 0 5 5 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 120 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 64 0 55 1 0 1 1 0 8 0 zombiepl 144 308 0 308 1 0 1 1 0 8 1 processpl 1008 340 0 308 5 0 5 5 0 8 0 procpl 632 555 0 515 4 0 4 4 0 8 0 sosppl 144 2 0 2 1 0 1 1 0 8 1 sockpl 400 254 0 232 3 0 3 3 0 8 0 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 207 0 0 25 0 25 25 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 257 0 0 15 0 15 15 0 8 0 mbufpl: pool(0xffffffff82933910:mbufpl): free list modified: page 0xfffffd806c866000; item ordinal 0; addr 0xfffffd806c866600 (p 0xfffffd80742c4000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd806c866000; item ordinal 0; addr 0xfffffd806c866600 (p 0xfffffd80742c4000); offset 0x0=0x0 mbufpl: pool(0xffffffff82933910:mbufpl): page inconsistency: page 0xfffffd806c866000; item ordinal 1; addr 0x65ac4f74861be01e bufpl 280 3402 0 127 234 0 234 234 0 8 0 anonpl 16 47169 0 29097 74 1 73 73 0 124 0 amapchunkpl 152 1833 0 1524 15 0 15 15 0 158 1 amappl16 192 1278 0 460 42 0 42 42 0 8 1 amappl15 184 9 0 7 1 0 1 1 0 8 0 amappl14 176 46 0 43 1 0 1 1 0 8 0 amappl13 168 29 0 26 1 0 1 1 0 8 0 amappl12 160 21 0 18 1 0 1 1 0 8 0 amappl11 152 103 0 86 1 0 1 1 0 8 0 amappl10 144 15 0 12 1 0 1 1 0 8 0 amappl9 136 415 0 412 1 0 1 1 0 8 0 amappl8 128 444 0 377 3 0 3 3 0 8 0 amappl7 120 117 0 105 1 0 1 1 0 8 0 amappl6 112 77 0 69 1 0 1 1 0 8 0 amappl5 104 173 0 158 1 0 1 1 0 8 0 amappl4 96 532 0 502 1 0 1 1 0 8 0 amappl3 88 124 0 114 1 0 1 1 0 8 0 amappl2 80 1646 0 1578 2 0 2 2 0 8 0 amappl1 72 18155 0 17707 23 10 13 18 0 8 3 amappl 80 849 0 766 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 18 0 17 1 0 1 1 0 8 0 aobjpl 64 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 324 0 308 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 324 0 308 1 0 1 1 0 8 0 vmmpekpl 168 6509 0 6473 2 0 2 2 0 8 0 vmmpepl 168 47887 0 45834 122 5 117 117 0 357 26 vmsppl 368 323 0 308 2 0 2 2 0 8 0 pdppl 4096 655 0 616 6 0 6 6 0 8 1 pvpl 32 158861 0 137632 174 0 174 174 0 265 2 pmappl 232 323 0 308 2 0 2 2 0 8 1 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 260 0 4 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff824a09ce) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff82933910,2,ffff8000230f48b8) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff82933910,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 ip_fragment(fffffd806c866d00,ffff80000017c2a8,5b4) at ip_fragment+0x13a sys/netinet/ip_output.c:680 ip_output(fffffd806c866d00,0,fffffd806f66be50,0,0,fffffd806f66bde0) at ip_output+0xfd7 sys/netinet/ip_output.c:499 udp_output(fffffd806f66bde0,fffffd806c866d00,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1017 sosend(fffffd806c913330,0,ffff8000230f4cc0,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020eb4018,7,ffff8000230f4da0,0,ffff8000230f4e80) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020eb4018,ffff8000230f4e38,ffff8000230f4e80) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff8000230f4f00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230f4f00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4cf0dd01560, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 end of kernel end trace frame: 0x7f7ffffce620, count: 12 ddb{1}> trace x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 end of kernel end trace frame: 0x7f7ffffce620, count: -3