panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806f15ca00+16 0x0!=0xf98ea495cdebf2b9 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 499811 12381 0 0x2 0x4000000 0K syz-fuzzer * 96335 29987 0 0x12 0 1 sshd db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240acfd) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828ce6d0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8063bb7d00,dac,404,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8063bb7d00,dac,404,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000ada940) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eae97d8,9,fffffd806f164000,0,0,ffff8000fffff648) at tcp_usrreq+0xa55 sosend(fffffd806eae97d8,0,ffff800020e02238,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff648,4,ffff800020e02238,0,ffff800020e02320) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff648,ffff800020e022d0,ffff800020e02320) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e023a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e023a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff44b0, 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 0xfffffd806f15ca00+16 0x0!=0xf98ea495cdebf2b9 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240acfd) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828ce6d0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8063bb7d00,dac,404,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8063bb7d00,dac,404,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000ada940) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eae97d8,9,fffffd806f164000,0,0,ffff8000fffff648) at tcp_usrreq+0xa55 sosend(fffffd806eae97d8,0,ffff800020e02238,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff648,4,ffff800020e02238,0,ffff800020e02320) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff648,ffff800020e022d0,ffff800020e02320) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e023a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e023a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff44b0, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e01bd0 rbx 0xffff800020e01c80 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff800020e01b90 r9 0xffffffff814bc41f kprintf+0x16f r10 0x1 r11 0xfa2dd8d0644ee0a4 r12 0x3000000008 r13 0xffff800020e01be0 r14 0x100 r15 0x1 rip 0xffffffff81c991c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e01bc0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (sshd) pid=96335 stat=onproc flags process=12 proc=0 pri=24, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe288,0xffff8000ffffe020 process=0xffff8000ffffc3f0 user=0xffff800020dfd000, vmspace=0xfffffd806e8f3738 estcpu=1, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 5256 299819 62729 0 2 0 syz-executor.0 16646 38334 0 0 3 0x14200 bored sosplice 48921 381638 12381 0 2 0x2 syz-executor.1 62729 91675 12381 0 2 0x2 syz-executor.0 12381 378934 68145 0 3 0x82 thrsleep syz-fuzzer 12381 391655 68145 0 3 0x4000082 nanosleep syz-fuzzer 12381 491878 68145 0 3 0x4000082 thrsleep syz-fuzzer 12381 173583 68145 0 3 0x4000082 thrsleep syz-fuzzer 12381 499811 68145 0 7 0x4000002 syz-fuzzer 12381 311372 68145 0 3 0x4000082 thrsleep syz-fuzzer 12381 349510 68145 0 3 0x4000082 nanosleep syz-fuzzer 12381 325475 68145 0 3 0x4000082 thrsleep syz-fuzzer 68145 389140 29987 0 3 0x10008a pause ksh *29987 96335 37073 0 7 0x12 sshd 61796 39241 1 0 3 0x100083 ttyin getty 37073 208303 1 0 3 0x80 select sshd 38929 348100 10361 74 3 0x100092 bpf pflogd 10361 270169 1 0 3 0x80 netio pflogd 28523 184861 91288 73 3 0x100090 kqread syslogd 91288 406004 1 0 3 0x100082 netio syslogd 71462 316654 1 77 3 0x100090 poll dhclient 41418 243200 1 0 3 0x80 poll dhclient 35089 462612 0 0 3 0x14200 bored smr 35608 504245 0 0 2 0x14200 zerothread 81358 370088 0 0 3 0x14200 aiodoned aiodoned 41824 34484 0 0 3 0x14200 syncer update 85138 410912 0 0 3 0x14200 cleaner cleaner 37924 396103 0 0 3 0x14200 reaper reaper 10641 103360 0 0 3 0x14200 pgdaemon pagedaemon 18539 125607 0 0 3 0x14200 bored crynlk 54603 288046 0 0 3 0x14200 bored crypto 22231 19371 0 0 3 0x40014200 acpi0 acpi0 56324 282108 0 0 3 0x40014200 idle1 6133 144311 0 0 2 0x14200 softnet 10659 149647 0 0 3 0x14200 bored systqmp 41050 129938 0 0 3 0x14200 bored systq 41246 479808 0 0 3 0x40014200 bored softclock 13830 136305 0 0 3 0x40014200 idle0 1 93924 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 48921 (syz-executor.1) thread 0xffff800020ec1b48 (381638) exclusive rrwlock inode r = 0 (0xfffffd8073221d60) #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 (0xfffffd80732213d0) #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 29987 (sshd) thread 0xffff8000fffff648 (96335) exclusive rwlock netlock r = 0 (0xffffffff827a6120) #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 9500 6408K 6852K 78643K 10791 0 pcb 13 8K 8K 78643K 41 0 rtable 105 3K 5K 78643K 346 0 ifaddr 65 13K 13K 78643K 101 0 counters 43 33K 34K 78643K 51 0 ioctlops 0 0K 4K 78643K 1493 0 iov 0 0K 16K 78643K 9 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1312 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 35 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 234 0 sigio 0 0K 0K 78643K 4 0 proc 60 63K 95K 78643K 484 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 12 0 in_multi 46 2K 2K 78643K 103 0 ether_multi 1 0K 0K 78643K 3 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 236 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 195 45K 45K 78643K 1766 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 20 0 NDP 10 0K 0K 78643K 22 0 temp 99 3867K 3931K 78643K 3973 0 kqueue 3 4K 8K 78643K 7 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 19 0 12 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 88 24 0 22 1 0 1 1 0 8 0 rtentry 112 86 0 44 2 0 2 2 0 8 0 unpcb 120 610 0 600 1 0 1 1 0 8 0 syncache 272 4 0 4 1 1 0 1 0 8 0 tcpqe 32 125 0 125 1 1 0 1 0 8 0 tcpcb 592 48 0 42 2 1 1 2 0 8 0 inpcb 296 443 0 435 2 0 2 2 0 8 1 nd6 48 18 0 14 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1136 1 0 1 1 0 1 1 0 8 1 pffrag 232 3 0 3 2 1 1 1 0 482 1 pffrnode 88 3 0 3 2 1 1 1 0 8 1 pffrent 40 91 0 91 2 1 1 1 0 8 1 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 3 1 0 1 1 0 8 1 pfstitem 24 86 0 2 1 0 1 1 0 8 0 pfstkey 112 86 0 2 3 0 3 3 0 8 0 pfstate 328 86 0 2 7 0 7 7 0 8 0 pfrule 1360 26 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 308 0 133 15 1 14 15 0 8 1 art_table 32 309 0 133 2 0 2 2 0 8 0 art_node 16 85 0 46 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 2 1 0 1 1 0 8 0 semapl 112 27 0 17 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1666 0 264 88 0 88 88 0 8 0 ffsino 272 1666 0 264 95 1 94 94 0 8 0 nchpl 144 2142 0 551 60 0 60 60 0 8 0 uvmvnodes 72 1782 0 0 33 0 33 33 0 8 0 vnodes 208 1782 0 0 94 0 94 94 0 8 0 namei 1024 5870 0 5870 2 1 1 1 0 8 1 percpumem 16 36 0 4 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 2 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 scxspl 200 6309 0 6309 9 8 1 7 0 8 1 plimitpl 152 34 0 26 1 0 1 1 0 8 0 sigapl 424 447 0 415 4 0 4 4 0 8 0 futexpl 56 2878 0 2878 1 0 1 1 0 8 1 knotepl 112 80 0 60 1 0 1 1 0 8 0 kqueuepl 152 24 0 22 1 0 1 1 0 8 0 pipepl 304 94 0 83 3 1 2 2 0 8 1 fdescpl 496 431 0 415 3 0 3 3 0 8 0 filepl 152 2804 0 2702 6 1 5 5 0 8 1 lockfpl 104 49 0 48 1 0 1 1 0 8 0 lockfspl 48 17 0 16 1 0 1 1 0 8 0 sessionpl 120 19 0 8 1 0 1 1 0 8 0 pgrppl 48 19 0 8 1 0 1 1 0 8 0 ucredpl 96 204 0 195 1 0 1 1 0 8 0 zombiepl 144 415 0 415 2 1 1 1 0 8 1 processpl 1008 447 0 415 6 1 5 5 0 8 0 procpl 632 873 0 834 5 1 4 4 0 8 0 sosppl 144 1 0 1 1 0 1 1 0 8 1 sockpl 400 1079 0 1060 6 2 4 4 0 8 2 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 147 0 0 18 0 18 18 0 8 0 mtagpl 96 13 0 0 1 0 1 1 0 8 0 mbufpl 256 374 0 0 23 0 23 23 0 8 0 bufpl 280 3591 0 126 248 0 248 248 0 8 0 anonpl 16 61859 0 44483 80 2 78 79 0 124 0 amapchunkpl 152 2626 0 2298 19 1 18 18 0 158 4 amappl16 192 1758 0 886 45 0 45 45 0 8 1 amappl15 184 2 0 0 1 0 1 1 0 8 0 amappl14 176 158 0 153 1 0 1 1 0 8 0 amappl13 168 68 0 64 1 0 1 1 0 8 0 amappl12 160 58 0 53 1 0 1 1 0 8 0 amappl11 152 56 0 41 1 0 1 1 0 8 0 amappl10 144 15 0 13 1 0 1 1 0 8 0 amappl9 136 383 0 380 1 0 1 1 0 8 0 amappl8 128 410 0 350 3 0 3 3 0 8 0 amappl7 120 118 0 107 1 0 1 1 0 8 0 amappl6 112 27 0 22 1 0 1 1 0 8 0 amappl5 104 287 0 271 1 0 1 1 0 8 0 amappl4 96 532 0 500 1 0 1 1 0 8 0 amappl3 88 319 0 308 1 0 1 1 0 8 0 amappl2 80 2420 0 2353 2 0 2 2 0 8 0 amappl1 72 21387 0 20956 23 13 10 18 0 8 0 amappl 80 1198 0 1105 3 0 3 3 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 433 0 415 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 433 0 415 1 0 1 1 0 8 0 vmmpekpl 168 7111 0 7071 2 0 2 2 0 8 0 vmmpepl 168 62445 0 60344 145 14 131 131 0 357 35 vmsppl 368 432 0 415 2 0 2 2 0 8 0 pdppl 4096 873 0 832 7 1 6 6 0 8 0 pvpl 32 196396 0 175965 187 5 182 187 0 265 1 pmappl 232 432 0 415 3 1 2 2 0 8 1 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 268 0 10 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff827b4ff0) 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 __sanitizer_cov_trace_const_cmp4(ffffffff828dd1c8,1) at __sanitizer_cov_trace_const_cmp4+0x6f sys/dev/kcov.c:193 tsleep(fffffd806e8bdc78,118,ffffffff8246f490,1770) at tsleep+0x19b kqueue_sleep(fffffd806e8bdc78,ffff800020ec8890) at kqueue_sleep+0x101 sys/kern/kern_event.c:885 kqueue_scan(fffffd806e8bdc78,40,c00004b638,ffff800020ec8890,ffff800020dd64f8,ffff800020ec88dc) at kqueue_scan+0x2b6 sys/kern/kern_event.c:928 sys_kevent(ffff800020dd64f8,ffff800020ec8950,ffff800020ec89a0) at sys_kevent+0x464 sys/kern/kern_event.c:640 syscall(ffff800020ec8a20) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ec8a20) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004be38, count: 5 ddb{0}> trace x86_ipi_db(ffffffff827b4ff0) 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 __sanitizer_cov_trace_const_cmp4(ffffffff828dd1c8,1) at __sanitizer_cov_trace_const_cmp4+0x6f sys/dev/kcov.c:193 tsleep(fffffd806e8bdc78,118,ffffffff8246f490,1770) at tsleep+0x19b kqueue_sleep(fffffd806e8bdc78,ffff800020ec8890) at kqueue_sleep+0x101 sys/kern/kern_event.c:885 kqueue_scan(fffffd806e8bdc78,40,c00004b638,ffff800020ec8890,ffff800020dd64f8,ffff800020ec88dc) at kqueue_scan+0x2b6 sys/kern/kern_event.c:928 sys_kevent(ffff800020dd64f8,ffff800020ec8950,ffff800020ec89a0) at sys_kevent+0x464 sys/kern/kern_event.c:640 syscall(ffff800020ec8a20) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ec8a20) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004be38, count: -10 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(ffffffff8240acfd) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828ce6d0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8063bb7d00,dac,404,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8063bb7d00,dac,404,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000ada940) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eae97d8,9,fffffd806f164000,0,0,ffff8000fffff648) at tcp_usrreq+0xa55 sosend(fffffd806eae97d8,0,ffff800020e02238,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff648,4,ffff800020e02238,0,ffff800020e02320) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff648,ffff800020e022d0,ffff800020e02320) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e023a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e023a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff44b0, count: 3 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240acfd) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828ce6d0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828ce6d0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8063bb7d00,dac,404,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8063bb7d00,dac,404,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000ada940) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eae97d8,9,fffffd806f164000,0,0,ffff8000fffff648) at tcp_usrreq+0xa55 sosend(fffffd806eae97d8,0,ffff800020e02238,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffff648,4,ffff800020e02238,0,ffff800020e02320) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffff648,ffff800020e022d0,ffff800020e02320) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e023a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e023a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff44b0, count: -12