panic: kernel diagnostic assertion "len >= 0 && !M_READONLY(m)" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/uipc_mbuf.c", line 1384 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *509673 69768 0 0 0x4000000 1K syz-executor.6 175451 70751 0 0 0 0 syz-executor.4 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8257162d) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825e9dfe,ffffffff8255a0b2,568,ffffffff8258855b) at __assert+0x25 sys/kern/subr_prf.c:161 m_align(fffffd8070869f00,ffffffd5) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002990b310,ffff800000df4a00,ffff80002990b078,ffff80002990af78) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(31700,ffff80002990b310,1) at bpfwrite+0x169 sys/net/bpf.c:644 spec_write(ffff80002990b170) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd806822f620,ffff80002990b310,1,fffffd807f7d86c0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd8067bf4390,ffff80002990b310,1) at vn_write+0x1a1 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800029954a90,3,ffff80002990b310,1,ffff80002990b410) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_pad_pwrite(ffff800029954a90,ffff80002990b3b8,ffff80002990b410) at sys_pad_pwrite+0x92 sys_pwrite sys/kern/vfs_syscalls.c:3354 [inline] sys_pad_pwrite(ffff800029954a90,ffff80002990b3b8,ffff80002990b410) at sys_pad_pwrite+0x92 sys/kern/vfs_syscalls.c:3426 syscall(ffff80002990b480) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002990b480) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe2971aa4b80, 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 *cpu1: kernel diagnostic assertion "len >= 0 && !M_READONLY(m)" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/uipc_mbuf.c", line 1384 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8257162d) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825e9dfe,ffffffff8255a0b2,568,ffffffff8258855b) at __assert+0x25 sys/kern/subr_prf.c:161 m_align(fffffd8070869f00,ffffffd5) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002990b310,ffff800000df4a00,ffff80002990b078,ffff80002990af78) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(31700,ffff80002990b310,1) at bpfwrite+0x169 sys/net/bpf.c:644 spec_write(ffff80002990b170) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd806822f620,ffff80002990b310,1,fffffd807f7d86c0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd8067bf4390,ffff80002990b310,1) at vn_write+0x1a1 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800029954a90,3,ffff80002990b310,1,ffff80002990b410) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_pad_pwrite(ffff800029954a90,ffff80002990b3b8,ffff80002990b410) at sys_pad_pwrite+0x92 sys_pwrite sys/kern/vfs_syscalls.c:3354 [inline] sys_pad_pwrite(ffff800029954a90,ffff80002990b3b8,ffff80002990b410) at sys_pad_pwrite+0x92 sys/kern/vfs_syscalls.c:3426 syscall(ffff80002990b480) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002990b480) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe2971aa4b80, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002990ad90 rbx 0xffff800020ce9bff rdx 0xffff800000c10640 rcx 0 rax 0xffff800029954a90 r8 0x101010101010101 r9 0x8080808080808080 r10 0x396c93f45e0d3d35 r11 0x4ca5ad1b604e936 r12 0xffff800020ce9a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81f80a58 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002990ad80 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.6) pid=509673 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800029954fd0,0xffff8000ffff2018 process=0xffff800029952dd0 user=0xffff800029906000, vmspace=0xfffffd80665fed18 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69768 241436 44223 0 2 0 syz-executor.6 *69768 509673 44223 0 7 0x4000000 syz-executor.6 70751 175451 84718 0 7 0 syz-executor.4 70751 73825 84718 0 2 0x4000000 syz-executor.4 54897 19230 21691 0 2 0 syz-executor.1 54897 366400 21691 0 3 0x4000080 fsleep syz-executor.1 3050 523583 78687 0 2 0 syz-executor.3 3050 365923 78687 0 3 0x4000080 fsleep syz-executor.3 87908 52064 63801 0 2 0 syz-executor.2 87908 468345 63801 0 3 0x4000080 fsleep syz-executor.2 30889 12765 88625 0 2 0 syz-executor.5 30889 288026 88625 0 3 0x4000080 fsleep syz-executor.5 30889 64663 88625 0 3 0x4000080 fsleep syz-executor.5 30889 446126 88625 0 2 0x4000000 syz-executor.5 44223 309597 52037 0 3 0x82 nanoslp syz-executor.6 82668 176911 0 0 3 0x14200 bored sosplice 66775 157614 52037 0 3 0x82 piperd syz-executor.0 41051 427056 52037 0 3 0x82 piperd syz-executor.7 88625 42913 52037 0 3 0x82 nanoslp syz-executor.5 84718 291952 52037 0 3 0x82 nanoslp syz-executor.4 78687 218045 52037 0 3 0x82 nanoslp syz-executor.3 63801 511152 52037 0 3 0x82 nanoslp syz-executor.2 21691 107305 52037 0 3 0x82 nanoslp syz-executor.1 52037 197332 85452 0 3 0x82 thrsleep syz-fuzzer 52037 251237 85452 0 3 0x4000082 thrsleep syz-fuzzer 52037 297177 85452 0 3 0x4000082 kqread syz-fuzzer 52037 114748 85452 0 3 0x4000082 thrsleep syz-fuzzer 52037 1600 85452 0 3 0x4000082 thrsleep syz-fuzzer 52037 167243 85452 0 3 0x4000082 thrsleep syz-fuzzer 52037 16959 85452 0 3 0x4000082 thrsleep syz-fuzzer 52037 70797 85452 0 3 0x4000082 thrsleep syz-fuzzer 52037 17195 85452 0 3 0x4000082 thrsleep syz-fuzzer 85452 65355 76919 0 3 0x10008a sigsusp ksh 76919 368322 95622 0 3 0x9a kqread sshd 3726 379834 1 0 3 0x100083 ttyin getty 95622 29358 1 0 3 0x88 kqread sshd 1934 304053 80970 74 3 0x100092 bpf pflogd 80970 12775 1 0 3 0x80 netio pflogd 2194 468473 27359 73 3 0x100090 kqread syslogd 27359 464771 1 0 3 0x100082 netio syslogd 97828 30148 1 0 3 0x100080 kqread resolvd 36889 448734 50483 77 3 0x100092 kqread dhcpleased 84144 504861 50483 77 3 0x100092 kqread dhcpleased 50483 513300 1 0 3 0x80 kqread dhcpleased 22330 409551 0 0 3 0x14200 bored smr 77900 417304 0 0 2 0x14200 zerothread 44461 436735 0 0 3 0x14200 aiodoned aiodoned 87061 117456 0 0 3 0x14200 syncer update 53726 454292 0 0 3 0x14200 cleaner cleaner 39952 408855 0 0 3 0x14200 reaper reaper 68295 338074 0 0 3 0x14200 pgdaemon pagedaemon 58737 501942 0 0 3 0x14200 bored viomb 45097 457974 0 0 3 0x40014200 acpi0 acpi0 88843 467889 0 0 3 0x40014200 idle1 90637 136025 0 0 3 0x14200 bored softnet 42594 485869 0 0 3 0x14200 bored systqmp 1590 147463 0 0 3 0x14200 bored systq 31410 437485 0 0 3 0x40014200 bored softclock 50666 430730 0 0 3 0x40014200 idle0 1 436543 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 69768 (syz-executor.6) thread 0xffff800029954a90 (509673) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b05080) #0 witness_lock+0x44d #1 vn_write+0x42 sys/kern/vfs_vnops.c:399 #2 dofilewritev+0x19c sys/kern/sys_generic.c:381 #3 sys_pad_pwrite+0x92 sys_pwrite sys/kern/vfs_syscalls.c:3354 [inline] #3 sys_pad_pwrite+0x92 sys/kern/vfs_syscalls.c:3426 #4 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #5 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10246 6549K 6810K 78643K 12802 0 pcb 13 11K 13K 78643K 136 0 rtable 206 6K 9K 78643K 613 0 ifaddr 88 17K 19K 78643K 216 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 86 0 ioctlops 0 0K 4K 78643K 1777 0 iov 0 0K 16K 78643K 106 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1340 84K 84K 78643K 2015 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 0K 78643K 221 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 81K 78643K 1239 0 proc 70 87K 111K 78643K 638 0 subproc 104 6K 6K 78643K 156 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 35 0 in_multi 88 5K 6K 78643K 179 0 ether_multi 1 0K 0K 78643K 7 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 403 1791K 1791K 78643K 403 0 exec 0 0K 2K 78643K 774 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 7 26K 26K 78643K 7 0 UVM amap 346 163K 164K 78643K 17323 0 UVM aobj 28 5K 5K 78643K 31 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 40 0 NDP 13 0K 1K 78643K 52 0 temp 112 4699K 4764K 78643K 21886 0 kqueue 12 18K 24K 78643K 81 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 61 0 58 1 0 1 1 0 8 0 rtentry 112 187 0 95 4 0 4 4 0 8 0 unpcb 136 3136 0 3053 19 14 5 8 0 8 2 syncache 296 7 0 7 3 2 1 1 0 8 1 tcpqe 32 62 0 62 3 2 1 1 0 8 1 tcpcb 736 498 0 492 21 20 1 8 0 8 0 arp 120 31 0 14 1 0 1 1 0 8 0 inpcb 304 1285 0 1276 27 26 1 11 0 8 0 nd6 48 43 0 19 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1248 3 0 3 1 0 1 1 0 8 1 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 4 0 3 1 0 1 1 0 8 0 pfosfp 40 1432 0 1008 5 0 5 5 0 8 0 pfosfpen 112 1432 0 714 21 0 21 21 0 8 0 pfrktable 1344 29 0 29 1 1 0 1 0 8 0 pftag 88 6 0 6 1 1 0 1 0 8 0 pfstitem 24 54 0 36 1 0 1 1 0 8 0 pfstkey 112 54 0 36 1 0 1 1 0 8 0 pfstate 320 54 0 36 3 0 3 3 0 8 0 pfrule 1360 67 0 62 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 873 0 476 31 6 25 29 0 8 0 art_table 32 874 0 476 4 0 4 4 0 8 0 art_node 16 184 0 103 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 8 1 0 1 1 0 8 0 semapl 112 219 0 209 1 0 1 1 0 8 0 shmpl 112 28 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3114 0 1674 91 0 91 91 0 8 0 ffsino 272 3114 0 1674 97 0 97 97 0 8 0 nchpl 144 4725 0 3093 63 0 63 63 0 8 0 uvmvnodes 80 3533 0 0 73 0 73 73 0 8 0 vnodes 224 3533 0 0 208 0 208 208 0 8 0 namei 1024 16456 0 16456 3 2 1 2 0 8 1 percpumem 16 55 0 15 1 0 1 1 0 8 0 vcpupl 2048 5 0 0 1 0 1 1 0 8 0 vmpool 560 9 0 4 1 0 1 1 0 8 0 pfiaddrpl 120 9 0 9 1 1 0 1 0 8 0 scxspl 216 13346 0 13346 11 10 1 8 0 8 1 plimitpl 152 84 0 68 1 0 1 1 0 8 0 sigapl 424 1534 0 1490 7 1 6 6 0 8 0 futexpl 64 9729 0 9724 1 0 1 1 0 8 0 knotepl 120 121 0 0 4 0 4 4 0 8 0 kqueuepl 216 197 0 189 4 3 1 3 0 8 0 pipepl 336 892 0 864 21 13 8 8 0 8 5 fdescpl 496 1519 0 1490 6 2 4 5 0 8 0 filepl 152 12228 0 11920 33 18 15 20 0 8 3 lockfpl 104 204 0 202 1 0 1 1 0 8 0 lockfspl 48 65 0 63 1 0 1 1 0 8 0 sessionpl 144 28 0 11 1 0 1 1 0 8 0 pgrppl 48 28 0 11 1 0 1 1 0 8 0 ucredpl 96 1958 0 1946 1 0 1 1 0 8 0 zombiepl 144 1490 0 1490 1 0 1 1 0 8 1 processpl 1064 1534 0 1490 4 0 4 4 0 8 0 procpl 672 3745 0 3685 8 2 6 7 0 8 0 srpgc 96 8 0 8 1 1 0 1 0 8 0 sosppl 168 15 0 15 1 1 0 1 0 8 0 sockpl 480 4485 0 4390 153 141 12 34 0 8 0 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 20 0 0 3 0 3 3 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 194 0 0 24 0 24 24 0 8 0 mtagpl 96 133 0 0 4 0 4 4 0 8 0 mbufpl 256 370 0 0 22 0 22 22 0 8 0 bufpl 288 5300 0 148 368 0 368 368 0 8 0 anonpl 24 401320 0 381889 157 32 125 137 0 186 0 amapchunkpl 152 40974 0 40088 49 12 37 43 0 158 0 amappl16 200 4164 0 3578 53 21 32 44 0 8 0 amappl15 192 395 0 389 1 0 1 1 0 8 0 amappl14 184 224 0 216 1 0 1 1 0 8 0 amappl13 176 299 0 297 1 0 1 1 0 8 0 amappl12 168 137 0 134 1 0 1 1 0 8 0 amappl11 160 219 0 201 1 0 1 1 0 8 0 amappl10 152 81 0 74 1 0 1 1 0 8 0 amappl9 144 491 0 487 1 0 1 1 0 8 0 amappl8 136 899 0 842 4 1 3 3 0 8 0 amappl7 128 352 0 337 1 0 1 1 0 8 0 amappl6 120 217 0 196 2 1 1 2 0 8 0 amappl5 112 1171 0 1152 1 0 1 1 0 8 0 amappl4 104 1291 0 1258 3 2 1 2 0 8 0 amappl3 96 382 0 371 1 0 1 1 0 8 0 amappl2 88 834 0 790 3 1 2 3 0 8 0 amappl1 80 30691 0 30104 20 7 13 19 0 8 0 amappl 88 16782 0 16517 8 1 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 30 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1528 0 1494 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1528 0 1494 1 0 1 1 0 8 0 vmmpekpl 168 18605 0 18559 3 0 3 3 0 8 0 vmmpepl 168 144114 0 141566 175 56 119 154 0 357 4 vmsppl 368 1527 0 1494 6 2 4 4 0 8 0 rwobjpl 56 39683 0 34535 75 2 73 73 0 8 0 pdppl 4096 3063 0 2993 145 71 74 77 0 8 4 pvpl 32 789761 0 765977 274 73 201 262 0 265 3 pmappl 248 1527 0 1494 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 846 0 117 21 0 21 21 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82919ff0) at x86_ipi_db+0x1a 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+0x23 __mp_lock(ffffffff82b04e78) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b04e78) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xc sys/dev/kcov.c:144 syscall(ffff800029915dd0) at syscall+0x392 mi_syscall sys/sys/syscall_mi.h:81 [inline] syscall(ffff800029915dd0) at syscall+0x392 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffaa40, count: 6 ddb{0}> trace x86_ipi_db(ffffffff82919ff0) at x86_ipi_db+0x1a 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+0x23 __mp_lock(ffffffff82b04e78) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b04e78) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xc sys/dev/kcov.c:144 syscall(ffff800029915dd0) at syscall+0x392 mi_syscall sys/sys/syscall_mi.h:81 [inline] syscall(ffff800029915dd0) at syscall+0x392 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffaa40, count: -9 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:440 panic(ffffffff8257162d) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825e9dfe,ffffffff8255a0b2,568,ffffffff8258855b) at __assert+0x25 sys/kern/subr_prf.c:161 m_align(fffffd8070869f00,ffffffd5) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002990b310,ffff800000df4a00,ffff80002990b078,ffff80002990af78) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(31700,ffff80002990b310,1) at bpfwrite+0x169 sys/net/bpf.c:644 spec_write(ffff80002990b170) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd806822f620,ffff80002990b310,1,fffffd807f7d86c0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd8067bf4390,ffff80002990b310,1) at vn_write+0x1a1 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800029954a90,3,ffff80002990b310,1,ffff80002990b410) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_pad_pwrite(ffff800029954a90,ffff80002990b3b8,ffff80002990b410) at sys_pad_pwrite+0x92 sys_pwrite sys/kern/vfs_syscalls.c:3354 [inline] sys_pad_pwrite(ffff800029954a90,ffff80002990b3b8,ffff80002990b410) at sys_pad_pwrite+0x92 sys/kern/vfs_syscalls.c:3426 syscall(ffff80002990b480) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002990b480) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe2971aa4b80, count: 2 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8257162d) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff825e9dfe,ffffffff8255a0b2,568,ffffffff8258855b) at __assert+0x25 sys/kern/subr_prf.c:161 m_align(fffffd8070869f00,ffffffd5) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002990b310,ffff800000df4a00,ffff80002990b078,ffff80002990af78) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(31700,ffff80002990b310,1) at bpfwrite+0x169 sys/net/bpf.c:644 spec_write(ffff80002990b170) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd806822f620,ffff80002990b310,1,fffffd807f7d86c0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd8067bf4390,ffff80002990b310,1) at vn_write+0x1a1 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800029954a90,3,ffff80002990b310,1,ffff80002990b410) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_pad_pwrite(ffff800029954a90,ffff80002990b3b8,ffff80002990b410) at sys_pad_pwrite+0x92 sys_pwrite sys/kern/vfs_syscalls.c:3354 [inline] sys_pad_pwrite(ffff800029954a90,ffff80002990b3b8,ffff80002990b410) at sys_pad_pwrite+0x92 sys/kern/vfs_syscalls.c:3426 syscall(ffff80002990b480) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002990b480) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe2971aa4b80, count: -13