panic: pool_do_get: mbufpl free list modified: page 0xfffffd8069dcb000; item addr 0xfffffd8069dcb300; offset 0x0=0x0 != 0x4a193aba4db85388 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *116891 65893 0 0 0x4000000 1 syz-executor.1 362716 16662 0 0x14000 0x40000200 0 softclock db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8249f74e) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff82936538,2,ffff8000230f82c8) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff82936538,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_copym(fffffd806f706e00,d3e8,4d0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806f706e00,d3e8,4d0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 ip6_fragment(fffffd806f706e00,28,11,500) at ip6_fragment+0x33e sys/netinet6/ip6_output.c:829 ip6_output(fffffd806f706e00,0,fffffd806f666e50,0,0,fffffd806f666de0) at ip6_output+0x1ba2 sys/netinet6/ip6_output.c:736 udp6_output(fffffd806f666de0,fffffd806f706400,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236 sosend(fffffd80789fb650,0,ffff8000230f8850,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020e04608,7,ffff8000230f8930,a,ffff8000230f8a10) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020e04608,ffff8000230f89c8,ffff8000230f8a10) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff8000230f8a90) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230f8a90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5bd3e8b3980, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic pool_do_get: mbufpl free list modified: page 0xfffffd8069dcb000; item addr 0xfffffd8069dcb300; offset 0x0=0x0 != 0x4a193aba4db85388 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8249f74e) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff82936538,2,ffff8000230f82c8) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff82936538,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_copym(fffffd806f706e00,d3e8,4d0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806f706e00,d3e8,4d0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 ip6_fragment(fffffd806f706e00,28,11,500) at ip6_fragment+0x33e sys/netinet6/ip6_output.c:829 ip6_output(fffffd806f706e00,0,fffffd806f666e50,0,0,fffffd806f666de0) at ip6_output+0x1ba2 sys/netinet6/ip6_output.c:736 udp6_output(fffffd806f666de0,fffffd806f706400,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236 sosend(fffffd80789fb650,0,ffff8000230f8850,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020e04608,7,ffff8000230f8930,a,ffff8000230f8a10) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020e04608,ffff8000230f89c8,ffff8000230f8a10) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff8000230f8a90) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230f8a90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5bd3e8b3980, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000230f8110 rbx 0xffff8000230f81c0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff8000230f80d0 r9 0xffffffff817bd10f kprintf+0x16f r10 0x1 r11 0x8f41dfcccba123e0 r12 0x3000000008 r13 0xffff8000230f8120 r14 0x100 r15 0x1 rip 0xffffffff821dd518 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000230f8100 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=116891 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020e03eb8,0xffffffff828f12a8 process=0xffff800020eaf380 user=0xffff8000230f3000, vmspace=0xfffffd807efff8a0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 65893 361009 94301 0 2 0 syz-executor.1 *65893 116891 94301 0 7 0x4000000 syz-executor.1 94301 184080 57731 0 2 0x482 syz-executor.1 88115 93202 57731 0 2 0x2 syz-executor.0 57731 219012 4464 0 3 0x82 thrsleep syz-fuzzer 57731 499964 4464 0 3 0x4000082 nanosleep syz-fuzzer 57731 131861 4464 0 3 0x4000082 thrsleep syz-fuzzer 57731 43479 4464 0 2 0x4000482 syz-fuzzer 57731 330933 4464 0 3 0x4000082 kqread syz-fuzzer 57731 354114 4464 0 3 0x4000082 thrsleep syz-fuzzer 57731 61194 4464 0 3 0x4000082 thrsleep syz-fuzzer 57731 483498 4464 0 3 0x4000082 thrsleep syz-fuzzer 4464 216570 80441 0 3 0x10008a pause ksh 80441 512190 25874 0 3 0x92 select sshd 98995 431649 1 0 3 0x100083 ttyin getty 25874 343323 1 0 3 0x80 select sshd 36142 74292 35638 74 3 0x100092 bpf pflogd 35638 44219 1 0 3 0x80 netio pflogd 47298 413048 9966 73 3 0x100090 kqread syslogd 9966 117649 1 0 3 0x100082 netio syslogd 36094 219505 1 77 3 0x100090 poll dhclient 63265 256532 1 0 3 0x80 poll dhclient 24158 75101 0 0 3 0x14200 bored smr 78350 358204 0 0 3 0x14200 pgzero zerothread 5327 71277 0 0 3 0x14200 aiodoned aiodoned 24221 171787 0 0 3 0x14200 syncer update 41687 110739 0 0 3 0x14200 cleaner cleaner 54818 341805 0 0 3 0x14200 reaper reaper 13308 53478 0 0 3 0x14200 pgdaemon pagedaemon 55299 67308 0 0 3 0x14200 bored crynlk 31342 371672 0 0 3 0x14200 bored crypto 57708 183172 0 0 3 0x40014200 acpi0 acpi0 62199 65573 0 0 3 0x40014200 idle1 45086 452355 0 0 3 0x14200 bored softnet 40552 134452 0 0 3 0x14200 bored systqmp 19593 26364 0 0 3 0x14200 bored systq 16662 362716 0 0 7 0x40014200 softclock 60556 415214 0 0 3 0x40014200 idle0 1 365211 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex mbufpl r = 0 (0xffffffff82936548) #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_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] #4 m_copym+0x174 sys/kern/uipc_mbuf.c:667 #5 ip6_fragment+0x33e sys/netinet6/ip6_output.c:829 #6 ip6_output+0x1ba2 sys/netinet6/ip6_output.c:736 #7 udp6_output+0x36a sys/netinet6/udp6_output.c:236 #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 65893 (syz-executor.1) thread 0xffff800020e04608 (116891) exclusive rwlock netlock r = 0 (0xffffffff826f8418) #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 (0xffffffff82936548) #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_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] #4 m_copym+0x174 sys/kern/uipc_mbuf.c:667 #5 ip6_fragment+0x33e sys/netinet6/ip6_output.c:829 #6 ip6_output+0x1ba2 sys/netinet6/ip6_output.c:736 #7 udp6_output+0x36a sys/netinet6/udp6_output.c:236 #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 88115 (syz-executor.0) thread 0xffff800020ddc008 (93202) exclusive rrwlock inode r = 0 (0xfffffd806c9ac098) #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 (0xfffffd806c9acc48) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9495 6415K 6611K 78643K 10744 0 pcb 13 8K 8K 78643K 55 0 rtable 115 5K 5K 78643K 280 0 ifaddr 62 12K 13K 78643K 225 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1494 0 iov 0 0K 4K 78643K 18 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1271 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 74 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 603 0 proc 60 63K 95K 78643K 457 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 7 0 in_multi 36 2K 2K 78643K 69 0 ether_multi 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 1K 78643K 213 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 166 25K 26K 78643K 2726 0 UVM aobj 9 2K 2K 78643K 15 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 8 0 NDP 10 0K 0K 78643K 21 0 temp 109 3869K 3933K 78643K 3273 0 kqueue 3 4K 10K 78643K 13 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 29 0 27 1 0 1 1 0 8 0 rtentry 112 66 0 21 2 0 2 2 0 8 0 unpcb 120 1306 0 1295 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 188 0 188 2 2 0 2 0 8 0 tcpcb 544 41 0 36 1 0 1 1 0 8 0 inpcb 296 392 0 383 4 2 2 2 0 8 1 nd6 48 18 0 8 1 0 1 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 2 0 1 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 pfrktable 1344 3 0 1 1 0 1 1 0 8 0 pfstitem 24 27 0 10 1 0 1 1 0 8 0 pfstkey 112 27 0 10 1 0 1 1 0 8 0 pfstate 328 27 0 10 2 0 2 2 0 8 0 pfrule 1360 25 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 446 0 179 18 1 17 17 0 8 0 art_table 32 447 0 179 3 0 3 3 0 8 0 art_node 16 65 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 112 72 0 62 1 0 1 1 0 8 0 shmpl 112 12 0 6 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2053 0 649 88 0 88 88 0 8 0 ffsino 272 2053 0 649 94 0 94 94 0 8 0 nchpl 144 2981 0 1375 60 0 60 60 0 8 0 uvmvnodes 72 2130 0 0 39 0 39 39 0 8 0 vnodes 208 2130 0 0 113 0 113 113 0 8 0 namei 1024 7714 0 7713 1 0 1 1 0 8 0 percpumem 16 32 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 scxspl 192 8694 0 8694 8 5 3 5 0 8 3 plimitpl 152 23 0 15 1 0 1 1 0 8 0 sigapl 424 818 0 787 4 0 4 4 0 8 0 futexpl 56 5996 0 5996 1 0 1 1 0 8 1 knotepl 112 76 0 56 1 0 1 1 0 8 0 kqueuepl 144 58 0 56 1 0 1 1 0 8 0 pipepl 304 109 0 98 3 1 2 2 0 8 1 fdescpl 496 803 0 787 4 1 3 3 0 8 0 filepl 152 4245 0 4140 5 0 5 5 0 8 0 lockfpl 104 454 0 453 1 0 1 1 0 8 0 lockfspl 48 202 0 201 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 22 0 11 1 0 1 1 0 8 0 ucredpl 96 260 0 251 1 0 1 1 0 8 0 zombiepl 144 787 0 787 1 0 1 1 0 8 1 processpl 992 818 0 787 5 0 5 5 0 8 0 procpl 624 1910 0 1871 4 0 4 4 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sockpl 400 1727 0 1705 4 0 4 4 0 8 1 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 265 0 0 33 0 33 33 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 344 0 0 19 0 19 19 0 8 0 mbufpl: pool(0xffffffff82936538:mbufpl): free list modified: page 0xfffffd8069dcb000; item ordinal 0; addr 0xfffffd8069dcb300 (p 0xfffffd8069dcc000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd8069dcb000; item ordinal 0; addr 0xfffffd8069dcb300 (p 0xfffffd8069dcc000); offset 0x0=0x0 mbufpl: pool(0xffffffff82936538:mbufpl): page inconsistency: page 0xfffffd8069dcb000; item ordinal 1; addr 0xde7ad402f0136df4 bufpl 280 4036 0 126 280 0 280 280 0 8 0 anonpl 16 86372 0 69072 87 1 86 86 0 124 15 amapchunkpl 152 4199 0 3916 19 4 15 17 0 158 2 amappl16 192 3253 0 2455 52 4 48 52 0 8 8 amappl15 184 290 0 287 1 0 1 1 0 8 0 amappl14 176 2 0 0 1 0 1 1 0 8 0 amappl13 168 310 0 306 1 0 1 1 0 8 0 amappl12 160 26 0 21 1 0 1 1 0 8 0 amappl11 152 58 0 43 1 0 1 1 0 8 0 amappl10 144 319 0 313 1 0 1 1 0 8 0 amappl9 136 369 0 368 1 0 1 1 0 8 0 amappl8 128 352 0 309 2 0 2 2 0 8 0 amappl7 120 407 0 390 1 0 1 1 0 8 0 amappl6 112 34 0 26 1 0 1 1 0 8 0 amappl5 104 702 0 686 1 0 1 1 0 8 0 amappl4 96 762 0 734 1 0 1 1 0 8 0 amappl3 88 137 0 126 1 0 1 1 0 8 0 amappl2 80 5474 0 5406 2 0 2 2 0 8 0 amappl1 72 31536 0 31097 23 13 10 18 0 8 0 amappl 80 2194 0 2119 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 14 0 6 1 0 1 1 0 8 0 uaddrrnd 24 803 0 787 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 803 0 787 1 0 1 1 0 8 0 vmmpekpl 168 9414 0 9380 2 0 2 2 0 8 0 vmmpepl 168 107126 0 105123 120 18 102 109 0 357 14 vmsppl 368 802 0 787 2 0 2 2 0 8 0 pdppl 4096 1613 0 1574 6 0 6 6 0 8 0 pvpl 32 283843 0 263367 202 0 202 202 0 265 34 pmappl 232 802 0 787 2 1 1 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 281 0 4 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82713ff0) 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 __mp_lock(ffffffff828ec9f0) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828ec9f0) at __mp_lock+0x127 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828ec9f0,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435 sleep_finish(ffff800020d973a8,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 softclock_thread(ffff800020d89110) at softclock_thread+0x103 sys/kern/kern_timeout.c:587 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff82713ff0) 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 __mp_lock(ffffffff828ec9f0) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828ec9f0) at __mp_lock+0x127 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828ec9f0,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435 sleep_finish(ffff800020d973a8,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 softclock_thread(ffff800020d89110) at softclock_thread+0x103 sys/kern/kern_timeout.c:587 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8249f74e) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff82936538,2,ffff8000230f82c8) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff82936538,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_copym(fffffd806f706e00,d3e8,4d0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806f706e00,d3e8,4d0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 ip6_fragment(fffffd806f706e00,28,11,500) at ip6_fragment+0x33e sys/netinet6/ip6_output.c:829 ip6_output(fffffd806f706e00,0,fffffd806f666e50,0,0,fffffd806f666de0) at ip6_output+0x1ba2 sys/netinet6/ip6_output.c:736 udp6_output(fffffd806f666de0,fffffd806f706400,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236 sosend(fffffd80789fb650,0,ffff8000230f8850,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020e04608,7,ffff8000230f8930,a,ffff8000230f8a10) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020e04608,ffff8000230f89c8,ffff8000230f8a10) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff8000230f8a90) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230f8a90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5bd3e8b3980, count: 2 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8249f74e) at panic+0x164 sys/kern/subr_prf.c:218 pool_do_get(ffffffff82936538,2,ffff8000230f82c8) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff82936538,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_copym(fffffd806f706e00,d3e8,4d0,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806f706e00,d3e8,4d0,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 ip6_fragment(fffffd806f706e00,28,11,500) at ip6_fragment+0x33e sys/netinet6/ip6_output.c:829 ip6_output(fffffd806f706e00,0,fffffd806f666e50,0,0,fffffd806f666de0) at ip6_output+0x1ba2 sys/netinet6/ip6_output.c:736 udp6_output(fffffd806f666de0,fffffd806f706400,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236 sosend(fffffd80789fb650,0,ffff8000230f8850,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:555 sendit(ffff800020e04608,7,ffff8000230f8930,a,ffff8000230f8a10) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020e04608,ffff8000230f89c8,ffff8000230f8a10) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff8000230f8a90) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230f8a90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5bd3e8b3980, count: -13