panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806b11c100+16 0x0!=0x2072138c814c784f Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *403105 34494 0 0x12 0 1 sshd 399852 53585 0 0x14000 0x200 0 softnet db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240bdef) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828f7de8,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000adb280) at tcp_output+0x14e6 tcp_usrreq(fffffd806eaf3c88,9,fffffd8077702100,0,0,ffff8000fffff648) at tcp_usrreq+0xa55 sosend(fffffd806eaf3c88,0,ffff800020e23e28,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff648,4,ffff800020e23e28,0,ffff800020e23f10) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff648,ffff800020e23ec0,ffff800020e23f10) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e23f90) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e23f90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffb7670, count: 3 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_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806b11c100+16 0x0!=0x2072138c814c784f ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240bdef) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828f7de8,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000adb280) at tcp_output+0x14e6 tcp_usrreq(fffffd806eaf3c88,9,fffffd8077702100,0,0,ffff8000fffff648) at tcp_usrreq+0xa55 sosend(fffffd806eaf3c88,0,ffff800020e23e28,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff648,4,ffff800020e23e28,0,ffff800020e23f10) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff648,ffff800020e23ec0,ffff800020e23f10) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e23f90) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e23f90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffb7670, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e23820 rbx 0xffff800020e238d0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff800020e237e0 r9 0xffffffff81c9883f kprintf+0x16f r10 0x1 r11 0xc7342cf4f7be07cb r12 0x3000000008 r13 0xffff800020e23830 r14 0x100 r15 0x1 rip 0xffffffff81c6ddc8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e23810 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (sshd) pid=403105 stat=onproc flags process=12 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe778,0xffff8000ffffea00 process=0xffff8000ffffc000 user=0xffff800020e1f000, vmspace=0xfffffd806e8ff8a8 estcpu=0, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 20752 227736 86021 0 3 0x80 nanosleep syz-executor.0 20752 296927 86021 0 3 0x4000080 msgwait syz-executor.0 20752 505616 86021 0 3 0x4000080 msgwait syz-executor.0 20752 380897 86021 0 3 0x4000080 fsleep syz-executor.0 3536 17204 0 0 3 0x14280 nfsidl nfsio 92486 438976 0 0 3 0x14280 nfsidl nfsio 72864 108487 0 0 3 0x14280 nfsidl nfsio 87917 414235 0 0 3 0x14280 nfsidl nfsio 71930 281577 0 0 3 0x14280 nfsidl nfsio 50828 119740 0 0 3 0x14280 nfsidl nfsio 73039 44030 0 0 3 0x14280 nfsidl nfsio 19316 91389 0 0 3 0x14280 nfsidl nfsio 56753 192357 0 0 3 0x14280 nfsidl nfsio 5803 364574 0 0 3 0x14280 nfsidl nfsio 12040 264527 0 0 3 0x14280 nfsidl nfsio 7042 394912 0 0 3 0x14280 nfsidl nfsio 91144 350980 0 0 3 0x14280 nfsidl nfsio 74555 48691 0 0 3 0x14280 nfsidl nfsio 52818 103464 0 0 3 0x14280 nfsidl nfsio 97596 439832 0 0 3 0x14280 nfsidl nfsio 83246 123313 0 0 3 0x14280 nfsidl nfsio 56834 350578 0 0 3 0x14280 nfsidl nfsio 63318 362925 0 0 3 0x14280 nfsidl nfsio 93015 296545 0 0 3 0x14280 nfsidl nfsio 73002 197908 0 0 3 0x14200 bored sosplice 23092 194295 79388 0 3 0x2 biowait syz-executor.1 86021 382937 79388 0 3 0x82 nanosleep syz-executor.0 79388 393731 95763 0 3 0x82 thrsleep syz-fuzzer 79388 37368 95763 0 3 0x4000082 nanosleep syz-fuzzer 79388 353759 95763 0 3 0x4000082 nanosleep syz-fuzzer 79388 187914 95763 0 3 0x4000082 thrsleep syz-fuzzer 79388 95337 95763 0 3 0x4000082 thrsleep syz-fuzzer 79388 400197 95763 0 3 0x4000082 thrsleep syz-fuzzer 79388 18640 95763 0 3 0x4000082 thrsleep syz-fuzzer 79388 154541 95763 0 3 0x4000082 kqread syz-fuzzer 95763 51627 34494 0 3 0x10008a pause ksh *34494 403105 90690 0 7 0x12 sshd 34185 448414 1 0 3 0x100083 ttyopn getty 90690 456819 1 0 3 0x80 select sshd 8027 343690 50187 74 3 0x100092 bpf pflogd 50187 160658 1 0 3 0x80 netio pflogd 96175 434207 96599 73 3 0x100090 kqread syslogd 96599 490329 1 0 3 0x100082 netio syslogd 45481 147832 1 77 3 0x100090 poll dhclient 32704 225608 1 0 3 0x80 poll dhclient 61361 291275 0 0 3 0x14200 bored smr 78431 431031 0 0 3 0x14200 pgzero zerothread 14525 185619 0 0 3 0x14200 aiodoned aiodoned 47606 14625 0 0 3 0x14200 syncer update 63930 473305 0 0 3 0x14200 cleaner cleaner 44915 472560 0 0 3 0x14200 reaper reaper 16114 242737 0 0 3 0x14200 pgdaemon pagedaemon 13342 405065 0 0 3 0x14200 bored crynlk 47049 438720 0 0 3 0x14200 bored crypto 13111 360395 0 0 3 0x40014200 acpi0 acpi0 69513 298618 0 0 3 0x40014200 idle1 53585 399852 0 0 7 0x14200 softnet 82666 339283 0 0 3 0x14200 bored systqmp 68964 3548 0 0 3 0x14200 bored systq 87982 255345 0 0 3 0x40014200 bored softclock 15679 202746 0 0 3 0x40014200 idle0 1 216366 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 23092 (syz-executor.1) thread 0xffff800020eb3b40 (194295) exclusive rrwlock inode r = 0 (0xfffffd806c838f78) #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 vget+0x1c8 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c838a28) #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 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #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 Process 34494 (sshd) thread 0xffff8000fffff648 (403105) exclusive rwlock netlock r = 0 (0xffffffff826f2960) #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 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #4 sys_write+0x83 sys/kern/sys_generic.c:285 #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9531 6608K 7318K 78643K 12112 0 pcb 13 8K 8K 78643K 69 0 rtable 112 5K 9K 78643K 546 0 ifaddr 78 15K 17K 78643K 210 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 67 0 ioctlops 0 0K 4K 78643K 1570 0 iov 0 0K 16K 78643K 58 0 mount 1 1K 1K 78643K 1 0 vnodes 1226 77K 77K 78643K 1611 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 13 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 143 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 437 0 sigio 0 0K 0K 78643K 6 0 proc 61 63K 95K 78643K 461 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 23 0 in_multi 47 2K 2K 78643K 91 0 ether_multi 1 0K 0K 78643K 5 0 mrt 0 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 232 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 183 93K 94K 78643K 2453 0 UVM aobj 33 6K 6K 78643K 38 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 51 0 NDP 12 0K 0K 78643K 33 0 temp 115 3878K 3942K 78643K 3562 0 kqueue 3 4K 12K 78643K 24 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 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 88 35 0 33 1 0 1 1 0 8 0 rtentry 112 61 0 19 2 0 2 2 0 8 0 unpcb 120 208 0 198 1 0 1 1 0 8 0 syncache 272 4 0 4 1 1 0 1 0 8 0 tcpqe 32 13 0 13 1 1 0 1 0 8 0 tcpcb 592 104 0 98 2 1 1 2 0 8 0 inpcb 296 498 0 491 5 3 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 14 0 9 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 ppxss 1136 4 0 4 2 2 0 1 0 8 0 pffrag 232 6 0 5 3 2 1 1 0 482 0 pffrnode 88 6 0 5 3 2 1 1 0 8 0 pffrent 40 98 0 97 3 2 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 106 0 102 1 0 1 1 0 8 0 pfstitem 24 42 0 23 1 0 1 1 0 8 0 pfstkey 112 42 0 23 1 0 1 1 0 8 0 pfstate 328 42 0 23 3 0 3 3 0 8 0 pfrule 1360 48 0 33 3 1 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 239 0 64 13 2 11 13 0 8 0 art_table 32 240 0 64 2 0 2 2 0 8 0 art_node 16 60 0 21 1 0 1 1 0 8 0 sysvmsgpl 40 32 0 25 3 2 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 133 0 123 1 0 1 1 0 8 0 shmpl 112 35 0 5 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2008 0 605 88 0 88 88 0 8 0 ffsino 272 2008 0 605 94 0 94 94 0 8 0 nchpl 144 2843 0 1230 60 0 60 60 0 8 0 uvmvnodes 72 2389 0 0 44 0 44 44 0 8 0 vnodes 208 2389 0 0 126 0 126 126 0 8 0 namei 1024 8110 0 8110 2 1 1 1 0 8 1 percpumem 16 44 0 12 1 0 1 1 0 8 0 vcpupl 1984 7 0 0 1 0 1 1 0 8 0 vmpool 560 7 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 32 0 30 4 3 1 1 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 200 8373 0 8372 12 9 3 7 0 8 2 plimitpl 152 40 0 32 1 0 1 1 0 8 0 sigapl 424 673 0 621 6 0 6 6 0 8 0 futexpl 56 5975 0 5974 2 1 1 1 0 8 0 knotepl 112 85 0 65 1 0 1 1 0 8 0 kqueuepl 152 66 0 64 1 0 1 1 0 8 0 pipepl 304 133 0 122 3 1 2 2 0 8 1 fdescpl 496 637 0 621 3 0 3 3 0 8 0 filepl 152 3855 0 3751 6 1 5 6 0 8 0 lockfpl 104 311 0 309 1 0 1 1 0 8 0 lockfspl 48 87 0 85 1 0 1 1 0 8 0 sessionpl 120 18 0 7 1 0 1 1 0 8 0 pgrppl 48 25 0 14 1 0 1 1 0 8 0 ucredpl 96 506 0 497 1 0 1 1 0 8 0 zombiepl 144 621 0 621 1 0 1 1 0 8 1 processpl 1008 673 0 621 7 0 7 7 0 8 0 procpl 632 1635 0 1573 6 0 6 6 0 8 0 sosppl 144 2 0 2 1 1 0 1 0 8 0 sockpl 400 745 0 726 8 4 4 4 0 8 2 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 176 0 0 21 0 21 21 0 8 0 mtagpl 96 21 0 0 1 0 1 1 0 8 0 mbufpl 256 343 0 0 19 0 19 19 0 8 0 bufpl 280 4065 0 129 282 0 282 282 0 8 0 anonpl 16 84284 0 66721 94 14 80 84 0 124 7 amapchunkpl 152 4294 0 3954 25 6 19 19 0 158 4 amappl16 192 2620 0 1839 50 10 40 48 0 8 0 amappl15 184 2 0 0 1 0 1 1 0 8 0 amappl14 176 214 0 210 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 152 256 0 240 1 0 1 1 0 8 0 amappl10 144 17 0 13 1 0 1 1 0 8 0 amappl9 136 569 0 566 1 0 1 1 0 8 0 amappl8 128 541 0 506 2 0 2 2 0 8 0 amappl7 120 117 0 105 1 0 1 1 0 8 0 amappl6 112 232 0 226 1 0 1 1 0 8 0 amappl5 104 334 0 317 1 0 1 1 0 8 0 amappl4 96 698 0 671 1 0 1 1 0 8 0 amappl3 88 147 0 138 1 0 1 1 0 8 0 amappl2 80 4177 0 4105 2 0 2 2 0 8 0 amappl1 72 28229 0 27764 24 14 10 18 0 8 0 amappl 80 1916 0 1824 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 37 0 5 1 0 1 1 0 8 0 uaddrrnd 24 644 0 621 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 644 0 621 1 0 1 1 0 8 0 vmmpekpl 168 8958 0 8909 3 0 3 3 0 8 0 vmmpepl 168 88403 0 86370 115 20 95 103 0 357 1 vmsppl 368 643 0 621 3 0 3 3 0 8 0 pdppl 4096 1295 0 1249 7 0 7 7 0 8 0 pvpl 32 256501 0 235589 215 25 190 198 0 265 19 pmappl 232 643 0 621 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 270 0 11 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff827b8ff0) 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(ffffffff828c5a80) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828c5a80) at __mp_lock+0x127 sys/kern/kern_lock.c:147 if_qstart_compat(ffff80000017c538) at if_qstart_compat+0x1a sys/net/if.c:675 ifq_serialize(ffff80000017c538,ffff80000017c658) at ifq_serialize+0x173 sys/net/ifq.c:113 taskq_thread(ffff80000002c000) at taskq_thread+0xfa sys/kern/kern_task.c:449 end trace frame: 0x0, count: 8 ddb{0}> trace x86_ipi_db(ffffffff827b8ff0) 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(ffffffff828c5a80) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828c5a80) at __mp_lock+0x127 sys/kern/kern_lock.c:147 if_qstart_compat(ffff80000017c538) at if_qstart_compat+0x1a sys/net/if.c:675 ifq_serialize(ffff80000017c538,ffff80000017c658) at ifq_serialize+0x173 sys/net/ifq.c:113 taskq_thread(ffff80000002c000) at taskq_thread+0xfa sys/kern/kern_task.c:449 end trace frame: 0x0, count: -7 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(ffffffff8240bdef) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828f7de8,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000adb280) at tcp_output+0x14e6 tcp_usrreq(fffffd806eaf3c88,9,fffffd8077702100,0,0,ffff8000fffff648) at tcp_usrreq+0xa55 sosend(fffffd806eaf3c88,0,ffff800020e23e28,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff648,4,ffff800020e23e28,0,ffff800020e23f10) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff648,ffff800020e23ec0,ffff800020e23f10) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e23f90) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e23f90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffb7670, count: 3 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240bdef) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828f7de8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828f7de8,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000adb280) at tcp_output+0x14e6 tcp_usrreq(fffffd806eaf3c88,9,fffffd8077702100,0,0,ffff8000fffff648) at tcp_usrreq+0xa55 sosend(fffffd806eaf3c88,0,ffff800020e23e28,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff648,4,ffff800020e23e28,0,ffff800020e23f10) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff648,ffff800020e23ec0,ffff800020e23f10) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e23f90) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e23f90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffb7670, count: -12