panic: kernel diagnostic assertion "((len + sizeof(long) - 1) &~ (sizeof(long) - 1)) <= M_SIZE(m)" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/uipc_mbuf.c", line 1380 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 58491 59093 0 0x14000 0x200 1 sosplice 491884 14348 0 0x14000 0x200 0 softnet0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a5490) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82827587,ffffffff82790c18,564,ffffffff827db35e) at __assert+0x29 sys/kern/subr_prf.c:157 m_align(fffffd80668ff800,7b2) at m_align+0x1e8 sys/kern/uipc_mbuf.c:1380 m_split(fffffd8063c7f400,3836,2) at m_split+0xe0 sys/kern/uipc_mbuf.c:1110 somove(fffffd806f508200,2) at somove+0xd5c sys/kern/uipc_socket.c:1673 sotask(fffffd806f508200) at sotask+0x52 sys/kern/uipc_socket.c:1427 taskq_thread(ffff800000d50900) at taskq_thread+0xe5 sys/kern/kern_task.c:450 end trace frame: 0x0, count: 7 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 *cpu1: kernel diagnostic assertion "((len + sizeof(long) - 1) &~ (sizeof(long) - 1)) <= M_SIZE(m)" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/uipc_mbuf.c", line 1380 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a5490) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82827587,ffffffff82790c18,564,ffffffff827db35e) at __assert+0x29 sys/kern/subr_prf.c:157 m_align(fffffd80668ff800,7b2) at m_align+0x1e8 sys/kern/uipc_mbuf.c:1380 m_split(fffffd8063c7f400,3836,2) at m_split+0xe0 sys/kern/uipc_mbuf.c:1110 somove(fffffd806f508200,2) at somove+0xd5c sys/kern/uipc_socket.c:1673 sotask(fffffd806f508200) at sotask+0x52 sys/kern/uipc_socket.c:1427 taskq_thread(ffff800000d50900) at taskq_thread+0xe5 sys/kern/kern_task.c:450 end trace frame: 0x0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e7232e0 rbx 0xffff800020d59ba7 rdx 0 rcx 0xffff8000224fc560 rax 0xffff800020d58ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x76e6e1fed5493b35 r11 0x814290c10450836d r12 0xffff800020d599a8 r13 0 r14 0 r15 0x1 rip 0xffffffff815a6dac db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002e7232d0 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (sosplice) tid=58491 pid=59093 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff8000211f4ff8,0xffff8000211eb818 process=0xffff800021271508 user=0xffff80002e71e000, vmspace=0xffffffff82d48650 estcpu=0, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 82202 459243 6537 0 2 0 syz-executor.6 82202 49244 6537 0 3 0x4000080 fsleep syz-executor.6 82202 162809 6537 0 3 0x4000080 fsleep syz-executor.6 73969 116041 23457 0 3 0x80 nanoslp syz-executor.5 73969 4484 23457 0 3 0x4000080 nanoslp syz-executor.5 73969 233146 23457 0 3 0x4000080 fsleep syz-executor.5 23457 383611 43126 0 3 0x82 nanoslp syz-executor.5 84672 446771 43126 0 3 0x82 piperd syz-executor.7 57848 370374 43126 0 3 0x82 piperd syz-executor.1 6537 92828 43126 0 3 0x82 nanoslp syz-executor.6 25332 30008 43126 0 3 0x82 piperd syz-executor.4 81619 326378 0 0 3 0x14280 nfsidl nfsio 55886 197474 0 0 3 0x14280 nfsidl nfsio 2876 191373 0 0 3 0x14280 nfsidl nfsio 12711 444702 0 0 3 0x14280 nfsidl nfsio 71065 479253 0 0 3 0x14280 nfsidl nfsio 50099 89994 0 0 3 0x14280 nfsidl nfsio 69398 383134 0 0 3 0x14280 nfsidl nfsio 13129 336057 0 0 3 0x14280 nfsidl nfsio 35691 1699 0 0 3 0x14280 nfsidl nfsio 35266 63133 0 0 3 0x14280 nfsidl nfsio 23914 323416 0 0 3 0x14280 nfsidl nfsio 43314 150669 0 0 3 0x14280 nfsidl nfsio 53612 124894 0 0 3 0x14280 nfsidl nfsio 65002 58373 0 0 3 0x14280 nfsidl nfsio 98425 103133 0 0 3 0x14280 nfsidl nfsio 16019 323320 0 0 3 0x14280 nfsidl nfsio 33475 77 0 0 3 0x14280 nfsidl nfsio 81352 123877 0 0 3 0x14280 nfsidl nfsio 57262 121512 0 0 3 0x14280 nfsidl nfsio 75230 304629 0 0 3 0x14280 nfsidl nfsio 52021 373154 43126 0 3 0x82 piperd syz-executor.2 34993 520420 43126 0 3 0x82 piperd syz-executor.0 20550 13131 1 0 3 0x100083 ttyin getty *59093 58491 0 0 7 0x14200 sosplice 77691 501735 43126 0 3 0x82 piperd syz-executor.3 43126 134460 21667 0 3 0x2000082 thrsleep syz-fuzzer 43126 383106 21667 0 3 0x6000082 thrsleep syz-fuzzer 43126 113206 21667 0 3 0x6000082 thrsleep syz-fuzzer 43126 453720 21667 0 3 0x6000082 thrsleep syz-fuzzer 43126 51583 21667 0 3 0x6000082 wait syz-fuzzer 43126 343921 21667 0 3 0x6000082 wait syz-fuzzer 43126 351087 21667 0 3 0x6000082 kqread syz-fuzzer 43126 117349 21667 0 3 0x6000082 wait syz-fuzzer 43126 115268 21667 0 3 0x6000082 wait syz-fuzzer 43126 283618 21667 0 3 0x6000082 thrsleep syz-fuzzer 43126 5460 21667 0 3 0x6000082 thrsleep syz-fuzzer 43126 515835 21667 0 3 0x6000082 wait syz-fuzzer 43126 285070 21667 0 3 0x6000082 wait syz-fuzzer 43126 111875 21667 0 3 0x6000082 wait syz-fuzzer 43126 240622 21667 0 3 0x6000082 wait syz-fuzzer 43126 210823 21667 0 3 0x6000082 thrsleep syz-fuzzer 21667 456540 66669 0 3 0x10008a sigsusp ksh 66669 55897 32270 0 3 0x9a kqread sshd 32270 177727 1 0 3 0x88 kqread sshd 27449 180812 13823 74 3 0x1100092 bpf pflogd 13823 172404 1 0 3 0x80 netio pflogd 63828 171490 10838 73 3 0x1100090 kqread syslogd 10838 501134 1 0 3 0x100082 netio syslogd 74703 514778 1 0 3 0x100080 kqread resolvd 38831 309433 3520 77 3 0x100092 kqread dhcpleased 5053 486904 3520 77 3 0x100092 kqread dhcpleased 3520 518556 1 0 3 0x80 kqread dhcpleased 93335 225941 0 0 3 0x14200 bored smr 17217 11293 0 0 3 0x14200 pgzero zerothread 12437 379737 0 0 3 0x14200 aiodoned aiodoned 95715 353476 0 0 3 0x14200 syncer update 10226 275190 0 0 3 0x14200 cleaner cleaner 59195 403854 0 0 3 0x14200 reaper reaper 51571 409299 0 0 3 0x14200 pgdaemon pagedaemon 87851 49383 0 0 3 0x14200 bored viomb 91524 502258 0 0 3 0x40014200 acpi0 acpi0 90199 357461 0 0 3 0x40014200 idle1 2516 352515 0 0 3 0x14200 bored softnet3 53218 146107 0 0 3 0x14200 bored softnet2 45997 322670 0 0 3 0x14200 bored softnet1 14348 491884 0 0 7 0x14200 softnet0 24863 85767 0 0 3 0x14200 bored systqmp 12780 27587 0 0 3 0x14200 bored systq 85446 518314 0 0 3 0x14200 tmoslp softclockmp 87097 343728 0 0 3 0x40014200 tmoslp softclock 97525 451208 0 0 3 0x40014200 idle0 1 103044 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 59093 (sosplice) thread 0xffff8000224fc560 (58491) exclusive rwlock netlock r = 0 (0xffffffff82ba48a0) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 sotask+0x1e sys/kern/uipc_socket.c:1419 #3 taskq_thread+0xe5 sys/kern/kern_task.c:450 #4 proc_trampoline+0x1c shared rwlock sosplice r = 0 (0xffff800000d50970) #0 witness_lock+0x447 #1 taskq_thread+0xca sys/kern/kern_task.c:446 #2 proc_trampoline+0x1c Process 14348 (softnet0) thread 0xffff800021168aa0 (491884) shared rwlock softnet0 r = 0 (0xffff80000002d070) #0 witness_lock+0x447 #1 taskq_thread+0xca sys/kern/kern_task.c:446 #2 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10229 6514K 7392K 78643K 37196 0 pcb 13 16K 18K 78643K 595 0 rtable 244 15K 15K 78643K 1108 0 pf 32 9K 10K 78643K 261 0 ifaddr 45 16K 17K 78643K 204 0 ifgroup 55 2K 2K 78643K 405 0 sysctl 3 0K 0K 78643K 5 0 counters 60 35K 36K 78643K 242 0 ioctlops 0 0K 4K 78643K 2138 0 iov 0 0K 16K 78643K 644 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1505 94K 94K 78643K 11987 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 141 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 2047 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 12 41K 93K 78643K 10483 0 sigio 0 0K 0K 78643K 488 0 proc 70 91K 127K 78643K 1570 0 subproc 104 6K 6K 78643K 369 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 380 0 in_multi 99 7K 7K 78643K 367 0 ether_multi 1 0K 0K 78643K 13 0 mrt 1 0K 0K 78643K 8 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 1K 78643K 1639 0 pfkey data 0 0K 0K 78643K 3 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 436 240K 245K 78643K 105028 0 UVM aobj 131 6K 6K 78643K 141 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 253 0 NDP 12 0K 1K 78643K 159 0 temp 81 5924K 6052K 78643K 138508 0 kqueue 12 18K 32K 78643K 719 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 plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 307 0 304 2 1 1 2 0 8 0 rtentry 112 346 0 234 4 0 4 4 0 8 0 unpcb 144 11617 0 11602 141 140 1 14 0 8 0 syncache 304 81 0 81 26 25 1 1 0 8 1 sackhl 24 2 0 2 2 2 0 1 0 8 0 tcpqe 32 474 0 474 15 14 1 2 0 8 1 tcpcb 808 3968 0 3960 183 175 8 14 0 8 7 arp 120 60 0 42 1 0 1 1 0 8 0 ipq 40 5 0 5 2 2 0 1 0 8 0 ipqe 40 15 0 15 2 2 0 1 0 8 0 inpcb 368 6853 0 6842 211 204 7 13 0 8 6 nd6 136 91 0 65 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 kcovpl 48 28 0 20 1 0 1 1 0 8 0 ppxss 1256 25 0 25 9 9 0 1 0 8 0 pffrag 232 81 0 80 5 4 1 1 0 482 0 pffrnode 88 81 0 80 5 4 1 1 0 8 0 pffrent 40 277 0 276 6 5 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 276 0 268 1 0 1 1 0 8 0 pfstkey 128 276 0 268 2 1 1 2 0 8 0 pfstate 376 276 0 268 11 9 2 4 0 8 0 pfrule 1344 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 1383 0 914 30 0 30 30 0 8 0 art_table 32 1384 0 914 4 0 4 4 0 8 0 art_node 16 339 0 237 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semapl 112 2045 0 2035 1 0 1 1 0 8 0 shmpl 112 138 0 10 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 17972 0 16451 96 0 96 96 0 8 0 ffsino 272 17972 0 16451 102 0 102 102 0 8 0 nchpl 144 32624 0 32124 63 40 23 63 0 8 0 uvmvnodes 80 5950 0 0 122 0 122 122 0 8 0 vnodes 216 5950 0 0 331 0 331 331 0 8 0 namei 1024 117061 0 117061 7 6 1 2 0 8 1 percpumem 16 134 0 91 1 0 1 1 0 8 0 vcpupl 2048 138 0 0 18 0 18 18 0 8 0 vmpool 696 149 0 11 15 2 13 13 0 8 0 kstatmem 264 206 0 182 2 0 2 2 0 8 0 scxspl 216 88000 0 88000 27 25 2 8 1 8 2 plimitpl 152 890 0 874 1 0 1 1 0 8 0 sigapl 424 10976 0 10912 10 2 8 8 0 8 0 futexpl 64 89851 0 89848 1 0 1 1 0 8 0 knotepl 120 907 0 0 14 3 11 11 0 8 0 kqueuepl 216 1657 0 1649 34 33 1 8 0 8 0 pipepl 320 2015 0 1987 81 74 7 11 0 8 4 fdescpl 496 10755 0 10730 5 1 4 5 0 8 0 filepl 152 79415 0 79173 249 234 15 24 0 8 5 lockfpl 104 8903 0 8901 23 22 1 4 0 8 0 lockfspl 48 4012 0 4010 3 2 1 2 0 8 0 sessionpl 144 45 0 28 1 0 1 1 0 8 0 pgrppl 48 157 0 140 1 0 1 1 0 8 0 ucredpl 104 21986 0 21973 1 0 1 1 0 8 0 zombiepl 144 10912 0 10912 1 0 1 1 0 8 1 processpl 1072 10976 0 10912 5 0 5 5 0 8 0 procpl 680 29716 0 29633 24 15 9 10 0 8 0 sosppl 168 96 0 94 19 18 1 1 0 8 0 sockpl 488 18798 0 18769 631 619 12 46 0 8 8 mcl64k 65536 25 0 0 4 1 3 3 0 8 0 mcl16k 16384 25 0 0 4 1 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 41 0 0 5 2 3 3 0 8 0 mcl4k 4096 46 0 0 3 1 2 3 0 8 0 mcl2k2 2112 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 480 0 0 36 13 23 36 0 8 0 mtagpl 96 1512 0 0 29 0 29 29 0 8 0 mbufpl 256 2350 0 0 135 0 135 135 0 8 0 bufpl 288 21325 0 15001 452 0 452 452 0 8 0 anonpl 24 1100663 0 1086726 210 97 113 126 0 186 9 amapchunkpl 152 330512 0 329707 78 38 40 49 0 158 0 amappl16 200 21796 0 21340 126 89 37 44 0 8 9 amappl15 192 16 0 15 1 0 1 1 0 8 0 amappl14 184 266 0 250 2 1 1 2 0 8 0 amappl13 176 23 0 22 1 0 1 1 0 8 0 amappl12 168 11732 0 11703 4 2 2 3 0 8 0 amappl11 160 61 0 46 1 0 1 1 0 8 0 amappl10 152 73 0 61 1 0 1 1 0 8 0 amappl9 144 307 0 306 1 0 1 1 0 8 0 amappl8 136 602 0 475 5 0 5 5 0 8 0 amappl7 128 106 0 90 2 0 2 2 0 8 0 amappl6 120 459 0 434 2 1 1 2 0 8 0 amappl5 112 430 0 419 1 0 1 1 0 8 0 amappl4 104 914 0 865 3 1 2 3 0 8 0 amappl3 96 65198 0 65127 4 1 3 3 0 8 0 amappl2 88 11323 0 11250 3 1 2 3 0 8 0 amappl1 80 47163 0 46613 24 11 13 23 0 8 0 amappl 88 103977 0 103752 7 0 7 7 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 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 72 140 0 10 3 0 3 3 0 8 0 uaddrrnd 24 10904 0 10741 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10904 0 10741 2 0 2 2 0 8 0 vmmpekpl 168 82261 0 82174 5 0 5 5 0 8 0 vmmpepl 168 646504 0 644104 406 279 127 140 0 357 3 vmsppl 464 10903 0 10741 26 4 22 22 0 8 1 rwobjpl 56 162698 0 155000 127 14 113 114 0 8 2 pdppl 4096 21815 0 21620 984 777 207 207 0 8 12 pvpl 32 3060078 0 3040343 570 368 202 364 0 265 23 pmappl 248 10903 0 10741 12 1 11 11 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2310 0 1206 33 1 32 32 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82c07ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:154 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 sys/dev/kcov.c:158 __mp_release_all(ffffffff82c58b00) at __mp_release_all+0x2c sys/kern/kern_lock.c:179 msleep(ffff80000002d000,ffff80000002d018,20,ffffffff827dfc7c,0) at msleep+0x156 sys/kern/kern_synch.c:234 taskq_next_work(ffff80000002d000,ffff80002118d8f0) at taskq_next_work+0x6e sys/kern/kern_task.c:403 taskq_thread(ffff80000002d000) at taskq_thread+0x135 sys/kern/kern_task.c:443 end trace frame: 0x0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff82c07ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:154 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 sys/dev/kcov.c:158 __mp_release_all(ffffffff82c58b00) at __mp_release_all+0x2c sys/kern/kern_lock.c:179 msleep(ffff80000002d000,ffff80000002d018,20,ffffffff827dfc7c,0) at msleep+0x156 sys/kern/kern_synch.c:234 taskq_next_work(ffff80000002d000,ffff80002118d8f0) at taskq_next_work+0x6e sys/kern/kern_task.c:403 taskq_thread(ffff80000002d000) at taskq_thread+0x135 sys/kern/kern_task.c:443 end trace frame: 0x0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a5490) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82827587,ffffffff82790c18,564,ffffffff827db35e) at __assert+0x29 sys/kern/subr_prf.c:157 m_align(fffffd80668ff800,7b2) at m_align+0x1e8 sys/kern/uipc_mbuf.c:1380 m_split(fffffd8063c7f400,3836,2) at m_split+0xe0 sys/kern/uipc_mbuf.c:1110 somove(fffffd806f508200,2) at somove+0xd5c sys/kern/uipc_socket.c:1673 sotask(fffffd806f508200) at sotask+0x52 sys/kern/uipc_socket.c:1427 taskq_thread(ffff800000d50900) at taskq_thread+0xe5 sys/kern/kern_task.c:450 end trace frame: 0x0, count: 7 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a5490) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82827587,ffffffff82790c18,564,ffffffff827db35e) at __assert+0x29 sys/kern/subr_prf.c:157 m_align(fffffd80668ff800,7b2) at m_align+0x1e8 sys/kern/uipc_mbuf.c:1380 m_split(fffffd8063c7f400,3836,2) at m_split+0xe0 sys/kern/uipc_mbuf.c:1110 somove(fffffd806f508200,2) at somove+0xd5c sys/kern/uipc_socket.c:1673 sotask(fffffd806f508200) at sotask+0x52 sys/kern/uipc_socket.c:1427 taskq_thread(ffff800000d50900) at taskq_thread+0xe5 sys/kern/kern_task.c:450 end trace frame: 0x0, count: -8