panic: pool_cache_iteWmAR_NmIaNgGi: cS_PcLh eNcOkT: LmObWuERfEpDl O Nc pSuY fSCrAeLeL l0is 1t2 1mo dEiXfIiTe d0: i9t e mStopped at savectx+0xb1: movl $0,%gs:0x530 TID PID UID PRFLAGS PFLAGS CPU COMMAND 68443 33933 0 0 0x4000000 1 syz-executor.0 *373418 22922 0 0 0x4000000 0 syz-executor.1 savectx() at savectx+0xb1 end of kernel end trace frame: 0x17d97ef4c60, count: 14 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_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806d7f8400+16 0x0!=0xa523e026d6b5d9a7 ddb{0}> trace savectx() at savectx+0xb1 end of kernel end trace frame: 0x17d97ef4c60, count: -1 ddb{0}> show registers rdi 0xffffffff814db3c3 printf+0x93 rsi 0x185e9 acpi_pdirpa+0x4451 rbp 0xffff800023fb3700 rbx 0 rdx 0x185ea acpi_pdirpa+0x4452 rcx 0xffff800023198000 rax 0x33 r8 0xffffffff814db7df kprintf+0x16f r9 0x1 r10 0x25 r11 0x8a7222d40ab2d912 r12 0 r13 0 r14 0xffff800020ed8768 r15 0 rip 0xffffffff816c23f1 savectx+0xb1 cs 0x8 rflags 0x46 rsp 0xffff800023fb3680 ss 0 savectx+0xb1: movl $0,%gs:0x530 ddb{0}> show proc PROC (syz-executor.1) pid=373418 stat=onproc flags process=0 proc=4000000 pri=17, usrpri=58, nice=20 forw=0xffffffffffffffff, list=0xffff800020ed84f8,0xffff800020ed9138 process=0xffff800020ece7d0 user=0xffff800023fae000, vmspace=0xfffffd807efff2e0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 33933 378239 48145 0 2 0 syz-executor.0 33933 68443 48145 0 7 0x4000000 syz-executor.0 22922 92408 16357 0 2 0 syz-executor.1 22922 168326 16357 0 3 0x4000080 fsleep syz-executor.1 *22922 373418 16357 0 7 0x4000000 syz-executor.1 22490 84180 0 0 3 0x14200 acct acct 14617 142808 0 0 3 0x14200 bored sosplice 16357 30302 90471 0 3 0x82 nanosleep syz-executor.1 48145 96897 90471 0 3 0x82 nanosleep syz-executor.0 90471 505183 10997 0 3 0x82 thrsleep syz-fuzzer 90471 442708 10997 0 3 0x4000082 thrsleep syz-fuzzer 90471 515033 10997 0 3 0x4000082 thrsleep syz-fuzzer 90471 40519 10997 0 3 0x4000082 thrsleep syz-fuzzer 90471 146079 10997 0 3 0x4000082 thrsleep syz-fuzzer 90471 169728 10997 0 3 0x4000082 kqread syz-fuzzer 90471 348369 10997 0 3 0x4000082 thrsleep syz-fuzzer 90471 39 10997 0 3 0x4000082 thrsleep syz-fuzzer 90471 423856 10997 0 3 0x4000082 thrsleep syz-fuzzer 90471 290466 10997 0 3 0x4000082 thrsleep syz-fuzzer 10997 427753 19258 0 3 0x10008a pause ksh 19258 238652 4890 0 3 0x92 select sshd 25859 282017 1 0 3 0x100083 ttyin getty 4890 148711 1 0 3 0x80 select sshd 15943 357269 17987 74 3 0x100092 bpf pflogd 17987 350912 1 0 3 0x80 netio pflogd 89796 171270 83917 73 3 0x100090 kqread syslogd 83917 259541 1 0 3 0x100082 netio syslogd 1506 328459 1 77 3 0x100090 poll dhclient 96295 263382 1 0 3 0x80 poll dhclient 21805 338062 0 0 3 0x14200 bored smr 71365 417934 0 0 2 0x14200 zerothread 66270 75211 0 0 3 0x14200 aiodoned aiodoned 16354 423186 0 0 3 0x14200 syncer update 94886 429516 0 0 3 0x14200 cleaner cleaner 66373 175319 0 0 3 0x14200 reaper reaper 79383 519917 0 0 3 0x14200 pgdaemon pagedaemon 53433 194427 0 0 3 0x14200 bored crynlk 50778 165528 0 0 3 0x14200 bored crypto 18674 251211 0 0 3 0x40014200 acpi0 acpi0 95481 9236 0 0 3 0x40014200 idle1 35504 284787 0 0 3 0x14200 bored softnet 42833 90426 0 0 3 0x14200 bored systqmp 34506 293019 0 0 3 0x14200 bored systq 47333 453450 0 0 3 0x40014200 bored softclock 61303 356873 0 0 3 0x40014200 idle0 1 373340 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &iopl->mtx r = 0 (0xffff800000038170) #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 scsi_xsh_runqueue+0x238 scsi_pending_finish sys/scsi/scsi_base.c:228 [inline] #3 scsi_xsh_runqueue+0x238 sys/scsi/scsi_base.c:597 #4 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535 #5 sdstrategy+0x187 sys/scsi/sd.c:585 #6 spec_strategy+0x74 sys/kern/spec_vnops.c:468 #7 ufs_strategy+0x17c #8 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712 #9 bwrite+0x1b9 sys/kern/vfs_bio.c:756 #10 ffs_write+0x6d3 #11 VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 #12 vn_write+0x14e sys/kern/vfs_vnops.c:414 #13 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #14 sys_writev+0xa7 sys/kern/sys_generic.c:312 #15 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #15 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #16 Xsyscall+0x128 Process 33933 (syz-executor.0) thread 0xffff800020ed9128 (68443) exclusive rwlock netlock r = 0 (0xffffffff824ddfc8) #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:537 #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 Process 22922 (syz-executor.1) thread 0xffff800020ed8768 (373418) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82693100) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 #2 mi_switch+0x392 sys/kern/sched_bsd.c:435 #3 sleep_finish+0x113 sys/kern/kern_synch.c:418 #4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] #4 sleep_finish_all+0x32 sys/kern/kern_synch.c:393 #5 tsleep+0x1cc sys/kern/kern_synch.c:155 #6 biowait+0xa6 sys/kern/vfs_bio.c:1256 #7 bwrite+0x1e4 sys/kern/vfs_bio.c:765 #8 ffs_write+0x6d3 #9 VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 #10 vn_write+0x14e sys/kern/vfs_vnops.c:414 #11 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #12 sys_writev+0xa7 sys/kern/sys_generic.c:312 #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 (0xfffffd80654b5700) #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 vn_write+0x11a sys/kern/vfs_vnops.c:411 #6 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #7 sys_writev+0xa7 sys/kern/sys_generic.c:312 #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 exclusive mutex &iopl->mtx r = 0 (0xffff800000038170) #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 scsi_xsh_runqueue+0x238 scsi_pending_finish sys/scsi/scsi_base.c:228 [inline] #3 scsi_xsh_runqueue+0x238 sys/scsi/scsi_base.c:597 #4 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535 #5 sdstrategy+0x187 sys/scsi/sd.c:585 #6 spec_strategy+0x74 sys/kern/spec_vnops.c:468 #7 ufs_strategy+0x17c #8 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712 #9 bwrite+0x1b9 sys/kern/vfs_bio.c:756 #10 ffs_write+0x6d3 #11 VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 #12 vn_write+0x14e sys/kern/vfs_vnops.c:414 #13 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #14 sys_writev+0xa7 sys/kern/sys_generic.c:312 #15 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #15 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #16 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9506 6418K 6805K 78643K 10813 0 pcb 13 8K 8K 78643K 63 0 rtable 105 3K 3K 78643K 245 0 ifaddr 68 14K 14K 78643K 108 0 counters 43 33K 34K 78643K 51 0 ioctlops 0 0K 4K 78643K 1479 0 iov 0 0K 24K 78643K 23 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1282 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 19 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1823 197K 290K 78643K 12980 0 file desc 6 17K 25K 78643K 171 0 proc 60 63K 95K 78643K 444 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 17 0 in_multi 56 3K 3K 78643K 77 0 ether_multi 1 0K 0K 78643K 9 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 227 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 124 39K 55K 78643K 1490 0 UVM aobj 10 4K 4K 78643K 10 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 42 0 NDP 10 0K 0K 78643K 18 0 temp 92 3042K 3112K 78643K 8424 0 kqueue 3 4K 8K 78643K 13 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 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 23 0 21 1 0 1 1 0 8 0 rtentry 112 48 0 4 2 0 2 2 0 8 0 unpcb 120 135 0 124 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 sackhl 24 1 0 0 1 0 1 1 0 8 0 tcpqe 32 376 0 376 1 1 0 1 0 8 0 tcpcb 544 92 0 88 1 0 1 1 0 8 0 inpcb 280 362 0 352 2 0 2 2 0 8 1 nd6 48 7 0 0 1 0 1 1 0 8 0 pffrag 232 2 0 2 1 0 1 1 0 482 1 pffrnode 88 2 0 2 1 0 1 1 0 8 1 pffrent 40 48 0 48 1 0 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 pfstitem 24 28 0 3 1 0 1 1 0 8 0 pfstkey 112 28 0 3 1 0 1 1 0 8 0 pfstate 328 28 0 3 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 209 0 2 13 0 13 13 0 8 0 art_table 32 210 0 2 2 0 2 2 0 8 0 art_node 16 47 0 7 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 0 1 0 1 1 0 8 0 semapl 112 17 0 7 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1634 0 226 89 0 89 89 0 8 0 ffsino 272 1634 0 226 95 0 95 95 0 8 0 nchpl 144 2059 0 450 60 0 60 60 0 8 0 uvmvnodes 72 1723 0 0 32 0 32 32 0 8 0 vnodes 208 1723 0 0 91 0 91 91 0 8 0 namei 1024 5488 0 5488 1 0 1 1 0 8 1 percpumem 16 36 0 4 1 0 1 1 0 8 0 vcpupl 1984 1 0 0 1 0 1 1 0 8 0 vmpool 560 1 0 0 1 0 1 1 0 8 0 scxspl 192 6290 0 6290 8 1 7 7 0 8 7 plimitpl 152 24 0 16 1 0 1 1 0 8 0 sigapl 424 388 0 354 4 0 4 4 0 8 0 futexpl 56 2601 0 2600 1 0 1 1 0 8 0 knotepl 112 72 0 53 1 0 1 1 0 8 0 kqueuepl 144 22 0 20 1 0 1 1 0 8 0 pipelkpl 48 92 0 82 1 0 1 1 0 8 0 pipepl 120 184 0 165 2 0 2 2 0 8 1 fdescpl 496 371 0 354 3 0 3 3 0 8 0 filepl 152 2138 0 2032 6 0 6 6 0 8 1 lockfpl 104 41 0 40 1 0 1 1 0 8 0 lockfspl 48 18 0 17 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 166 0 157 1 0 1 1 0 8 0 zombiepl 144 354 0 354 1 0 1 1 0 8 1 processpl 984 388 0 354 5 0 5 5 0 8 0 procpl 624 715 0 669 4 0 4 4 0 8 0 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 400 520 0 497 4 0 4 4 0 8 1 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 187 0 0 23 0 23 23 0 8 0 mtagpl 80 15 0 0 1 0 1 1 0 8 0 mbufpl 256 212 0 0 13 0 13 13 0 8 0 bufpl 280 3903 0 132 270 0 270 270 0 8 0 anonpl 16 50662 0 36584 69 1 68 68 0 124 11 amapchunkpl 152 2587 0 2454 21 2 19 19 0 158 13 amappl16 192 1731 0 972 47 4 43 47 0 8 5 amappl15 184 66 0 63 1 0 1 1 0 8 0 amappl14 176 24 0 21 1 0 1 1 0 8 0 amappl13 168 26 0 25 1 0 1 1 0 8 0 amappl12 160 82 0 75 1 0 1 1 0 8 0 amappl11 152 60 0 45 1 0 1 1 0 8 0 amappl10 144 25 0 19 1 0 1 1 0 8 0 amappl9 136 381 0 380 1 0 1 1 0 8 0 amappl8 128 358 0 322 2 0 2 2 0 8 0 amappl7 120 127 0 113 1 0 1 1 0 8 0 amappl6 112 30 0 25 1 0 1 1 0 8 0 amappl5 104 279 0 261 1 0 1 1 0 8 0 amappl4 96 497 0 466 1 0 1 1 0 8 0 amappl3 88 106 0 101 1 0 1 1 0 8 0 amappl2 80 2090 0 2006 2 0 2 2 0 8 0 amappl1 72 18210 0 17743 23 13 10 18 0 8 0 amappl 80 969 0 922 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 372 0 354 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 372 0 354 1 0 1 1 0 8 0 vmmpekpl 168 6892 0 6860 2 0 2 2 0 8 0 vmmpepl 168 52091 0 50056 107 8 99 104 0 357 10 vmsppl 368 371 0 354 2 0 2 2 0 8 0 pdppl 4096 752 0 709 6 0 6 6 0 8 0 pvpl 32 166922 0 149575 166 0 166 166 0 265 26 pmappl 232 371 0 354 3 1 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 263 0 3 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xb1 end of kernel end trace frame: 0x17d97ef4c60, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020e00ff0) 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 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639 comcnputc(800,6d) at comcnputc+0x1c8 sys/dev/ic/com.c:1260 cnputc(6d) at cnputc+0x4c sys/dev/cons.c:239 kputchar(6d,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700 panic(ffffffff821fc0da) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821fc0da) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff8268b9a0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff8268b9a0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff8268b9a0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 ip6_fragment(fffffd806f2bc900,28,11,5dc) at ip6_fragment+0xec sys/netinet6/ip6_output.c:810 ip6_output(fffffd806f2bc900,0,fffffd806f6d9a48,0,0,fffffd806f6d99d8) at ip6_output+0x1b92 sys/netinet6/ip6_output.c:736 end trace frame: 0xffff800023fb9a60, count: 0 ddb{1}> trace x86_ipi_db(ffff800020e00ff0) 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 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x3c sys/arch/amd64/amd64/bus_space.c:639 comcnputc(800,6d) at comcnputc+0x1c8 sys/dev/ic/com.c:1260 cnputc(6d) at cnputc+0x4c sys/dev/cons.c:239 kputchar(6d,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700 panic(ffffffff821fc0da) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821fc0da) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff8268b9a0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff8268b9a0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff8268b9a0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 ip6_fragment(fffffd806f2bc900,28,11,5dc) at ip6_fragment+0xec sys/netinet6/ip6_output.c:810 ip6_output(fffffd806f2bc900,0,fffffd806f6d9a48,0,0,fffffd806f6d99d8) at ip6_output+0x1b92 sys/netinet6/ip6_output.c:736 udp6_output(fffffd806f6d99d8,fffffd807f01e900,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236 sosend(fffffd806cb381a0,0,ffff800023fb9b60,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:549 sendit(ffff800020ed9128,9,ffff800023fb9c40,a,ffff800023fb9d20) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020ed9128,ffff800023fb9cd8,ffff800023fb9d20) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff800023fb9da0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023fb9da0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x13f1011bfd0, count: -20