panic: kernel diagnostic assertion "mhead->m_flags & M_PKTHDR" failed: file "/syzkaller/managers/multicore/kernel/sys/net/switchctl.c", line 245 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 518405 29097 0 0 0 0 syz-executor.0 *437646 59756 0 0 0x4000000 1K syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821ff832) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82254ed0,ffffffff82216e99,f5,ffffffff821dd50d) at __assert+0x2b sys/kern/subr_prf.c:154 switchwrite(86128,ffff800022034f70,1) at switchwrite+0x44f sys/net/switchctl.c:245 spec_write(ffff800022034d40) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8064d4e0e8,ffff800022034f70,1,fffffd807f7bf840) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 vn_write(fffffd806cb81b58,ffff800022034f70,1) at vn_write+0x198 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800020ec69d8,3,ffff800022034f70,1,ffff800022035060) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_pwritev(ffff800020ec69d8,ffff800022035018,ffff800022035060) at sys_pwritev+0xb8 sys/kern/vfs_syscalls.c:3338 syscall(ffff8000220350e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000220350e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3ae8f473900, count: 4 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 kernel diagnostic assertion "mhead->m_flags & M_PKTHDR" failed: file "/syzkaller/managers/multicore/kernel/sys/net/switchctl.c", line 245 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821ff832) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82254ed0,ffffffff82216e99,f5,ffffffff821dd50d) at __assert+0x2b sys/kern/subr_prf.c:154 switchwrite(86128,ffff800022034f70,1) at switchwrite+0x44f sys/net/switchctl.c:245 spec_write(ffff800022034d40) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8064d4e0e8,ffff800022034f70,1,fffffd807f7bf840) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 vn_write(fffffd806cb81b58,ffff800022034f70,1) at vn_write+0x198 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800020ec69d8,3,ffff800022034f70,1,ffff800022035060) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_pwritev(ffff800020ec69d8,ffff800022035018,ffff800022035060) at sys_pwritev+0xb8 sys/kern/vfs_syscalls.c:3338 syscall(ffff8000220350e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000220350e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3ae8f473900, count: -11 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800022034b40 rbx 0xffff800022034bf0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff8212b2ff kprintf+0x16f r9 0x1 r10 0x2 r11 0x3c0e5c53e0f988b6 r12 0x3000000008 r13 0xffff800022034b50 r14 0x100 r15 0x1 rip 0xffffffff81cb79c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022034b30 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=437646 stat=onproc flags process=0 proc=4000000 pri=73, usrpri=73, nice=20 forw=0xffffffffffffffff, list=0xffff800020ec7878,0xffffffff826aa8a0 process=0xffff80002200af90 user=0xffff800022030000, vmspace=0xfffffd807f000730 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29097 518405 678 0 7 0 syz-executor.0 29097 39003 678 0 3 0x4000080 fsleep syz-executor.0 59756 189982 77193 0 2 0 syz-executor.1 59756 460649 77193 0 3 0x4000080 fsleep syz-executor.1 *59756 437646 77193 0 7 0x4000000 syz-executor.1 42830 28717 0 0 3 0x14200 bored sosplice 77193 57681 12252 0 3 0x82 nanosleep syz-executor.1 36324 214489 0 0 3 0x14280 nfsidl nfsio 50194 440661 0 0 3 0x14280 nfsidl nfsio 63579 124837 0 0 3 0x14280 nfsidl nfsio 53684 127903 0 0 3 0x14280 nfsidl nfsio 9393 227167 0 0 3 0x14280 nfsidl nfsio 86781 472940 0 0 3 0x14280 nfsidl nfsio 90609 408341 0 0 3 0x14280 nfsidl nfsio 32509 219793 0 0 3 0x14280 nfsidl nfsio 157 365026 0 0 3 0x14280 nfsidl nfsio 70529 14029 0 0 3 0x14280 nfsidl nfsio 20702 343312 0 0 3 0x14280 nfsidl nfsio 21473 298175 0 0 3 0x14280 nfsidl nfsio 56772 452925 0 0 3 0x14280 nfsidl nfsio 27343 353255 0 0 3 0x14280 nfsidl nfsio 79936 494103 0 0 3 0x14280 nfsidl nfsio 57619 296939 0 0 3 0x14280 nfsidl nfsio 91149 65041 0 0 3 0x14280 nfsidl nfsio 96603 275820 0 0 3 0x14280 nfsidl nfsio 73232 480612 0 0 3 0x14280 nfsidl nfsio 34513 277774 0 0 3 0x14280 nfsidl nfsio 678 135559 12252 0 3 0x82 nanosleep syz-executor.0 12252 348834 96426 0 3 0x82 thrsleep syz-fuzzer 12252 21419 96426 0 3 0x4000082 nanosleep syz-fuzzer 12252 464185 96426 0 3 0x4000082 thrsleep syz-fuzzer 12252 240567 96426 0 3 0x4000082 thrsleep syz-fuzzer 12252 233201 96426 0 3 0x4000082 thrsleep syz-fuzzer 12252 134540 96426 0 3 0x4000082 thrsleep syz-fuzzer 12252 285370 96426 0 3 0x4000082 thrsleep syz-fuzzer 12252 149573 96426 0 3 0x4000082 thrsleep syz-fuzzer 12252 288597 96426 0 3 0x4000082 kqread syz-fuzzer 12252 194852 96426 0 3 0x4000082 thrsleep syz-fuzzer 96426 473060 72229 0 3 0x10008a pause ksh 72229 75416 76363 0 3 0x92 select sshd 41356 237291 1 0 3 0x100083 ttyin getty 76363 55121 1 0 3 0x80 select sshd 954 253174 16282 74 3 0x100092 bpf pflogd 16282 440884 1 0 3 0x80 netio pflogd 99198 23884 91154 73 3 0x100090 kqread syslogd 91154 518774 1 0 3 0x100082 netio syslogd 50240 494774 1 77 3 0x100090 poll dhclient 13126 470310 1 0 3 0x80 poll dhclient 89227 459454 0 0 3 0x14200 bored smr 35714 20650 0 0 2 0x14200 zerothread 22175 254766 0 0 3 0x14200 aiodoned aiodoned 5307 291578 0 0 3 0x14200 syncer update 96653 314058 0 0 3 0x14200 cleaner cleaner 29929 81902 0 0 3 0x14200 reaper reaper 35400 205363 0 0 3 0x14200 pgdaemon pagedaemon 28013 274151 0 0 3 0x14200 bored crynlk 7548 497535 0 0 3 0x14200 bored crypto 44131 29592 0 0 3 0x40014200 acpi0 acpi0 1043 315059 0 0 3 0x40014200 idle1 36199 286273 0 0 3 0x14200 bored softnet 91670 108651 0 0 3 0x14200 bored systqmp 9272 189422 0 0 3 0x14200 bored systq 21039 384616 0 0 3 0x40014200 bored softclock 91072 381375 0 0 3 0x40014200 idle0 1 440985 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 59756 (syz-executor.1) thread 0xffff800020ec69d8 (437646) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff826906e8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 vn_write+0x42 sys/kern/vfs_vnops.c:399 #2 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #3 sys_pwritev+0xb8 sys/kern/vfs_syscalls.c:3338 #4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #5 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9536 6556K 7331K 78643K 11936 0 pcb 13 8K 8K 78643K 55 0 rtable 116 4K 4K 78643K 294 0 ifaddr 74 14K 14K 78643K 96 0 counters 43 33K 34K 78643K 49 0 ioctlops 0 0K 4K 78643K 1480 0 iov 1 12K 16K 78643K 37 0 mount 1 1K 1K 78643K 1 0 vnodes 1228 77K 77K 78643K 1566 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 38 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 242 0 sigio 0 0K 0K 78643K 4 0 proc 62 63K 95K 78643K 501 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 66 0 in_multi 33 2K 2K 78643K 58 0 ether_multi 1 0K 0K 78643K 5 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 1K 78643K 259 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 133 24K 24K 78643K 1750 0 UVM aobj 12 4K 4K 78643K 22 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 28 0 NDP 13 0K 0K 78643K 22 0 temp 107 3035K 3099K 78643K 4698 0 kqueue 3 4K 8K 78643K 20 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 9 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 45 0 43 1 0 1 1 0 8 0 rtentry 112 63 0 15 2 0 2 2 0 8 0 unpcb 120 199 0 189 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpqe 32 182 0 182 1 1 0 1 0 8 0 tcpcb 544 90 0 86 1 0 1 1 0 8 0 inpcb 280 561 0 548 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 11 0 4 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrent 40 2 0 2 1 1 0 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 pfstitem 24 32 0 2 1 0 1 1 0 8 0 pfstkey 112 32 0 2 1 0 1 1 0 8 0 pfstate 328 32 0 2 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 256 284 0 59 15 0 15 15 0 8 0 art_table 32 285 0 59 2 0 2 2 0 8 0 art_node 16 62 0 18 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 3 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 34 0 24 1 0 1 1 0 8 0 shmpl 112 20 0 10 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1704 0 298 89 0 89 89 0 8 0 ffsino 272 1704 0 298 94 0 94 94 0 8 0 nchpl 144 2198 0 601 60 0 60 60 0 8 0 uvmvnodes 72 2063 0 0 38 0 38 38 0 8 0 vnodes 208 2063 0 0 109 0 109 109 0 8 0 namei 1024 6168 0 6168 1 0 1 1 0 8 1 percpumem 16 35 0 3 1 0 1 1 0 8 0 scxspl 192 5823 0 5823 8 3 5 7 0 8 5 plimitpl 152 36 0 28 1 0 1 1 0 8 0 sigapl 424 475 0 422 6 0 6 6 0 8 0 futexpl 56 4048 0 4046 1 0 1 1 0 8 0 knotepl 112 87 0 68 1 0 1 1 0 8 0 kqueuepl 144 32 0 30 1 0 1 1 0 8 0 pipelkpl 48 111 0 101 1 0 1 1 0 8 0 pipepl 120 222 0 203 1 0 1 1 0 8 0 fdescpl 496 439 0 422 3 0 3 3 0 8 0 filepl 152 2789 0 2686 5 0 5 5 0 8 1 lockfpl 104 17 0 16 1 0 1 1 0 8 0 lockfspl 48 9 0 8 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 19 0 8 1 0 1 1 0 8 0 ucredpl 96 158 0 149 1 0 1 1 0 8 0 zombiepl 144 422 0 422 1 0 1 1 0 8 1 processpl 984 475 0 422 7 0 7 7 0 8 0 procpl 624 949 0 884 6 0 6 6 0 8 1 sosppl 128 1 0 1 1 0 1 1 0 8 1 sockpl 400 806 0 785 4 0 4 4 0 8 1 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 227 0 0 28 0 28 28 0 8 0 mtagpl 80 80 0 0 2 0 2 2 0 8 0 mbufpl 256 389 0 0 24 0 24 24 0 8 0 bufpl 280 3622 0 133 250 0 250 250 0 8 0 anonpl 16 54993 0 40303 61 1 60 60 0 124 0 amapchunkpl 152 2296 0 2155 7 0 7 7 0 158 0 amappl16 192 1726 0 921 41 0 41 41 0 8 0 amappl15 184 50 0 48 2 1 1 1 0 8 0 amappl14 176 28 0 22 1 0 1 1 0 8 0 amappl13 168 51 0 47 1 0 1 1 0 8 0 amappl12 160 7 0 4 1 0 1 1 0 8 0 amappl11 152 107 0 89 1 0 1 1 0 8 0 amappl10 144 165 0 160 1 0 1 1 0 8 0 amappl9 136 389 0 388 1 0 1 1 0 8 0 amappl8 128 386 0 347 2 0 2 2 0 8 0 amappl7 120 267 0 252 1 0 1 1 0 8 0 amappl6 112 81 0 70 1 0 1 1 0 8 0 amappl5 104 277 0 262 1 0 1 1 0 8 0 amappl4 96 553 0 521 1 0 1 1 0 8 0 amappl3 88 110 0 104 1 0 1 1 0 8 0 amappl2 80 2496 0 2417 2 0 2 2 0 8 0 amappl1 72 19629 0 19176 23 13 10 18 0 8 0 amappl 80 1194 0 1147 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 21 0 10 1 0 1 1 0 8 0 uaddrrnd 24 439 0 422 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 439 0 422 1 0 1 1 0 8 0 vmmpekpl 168 7345 0 7304 2 0 2 2 0 8 0 vmmpepl 168 60322 0 58251 120 4 116 116 0 357 25 vmsppl 368 438 0 422 2 0 2 2 0 8 0 pdppl 4096 886 0 844 6 0 6 6 0 8 0 pvpl 32 183793 0 165620 149 2 147 149 0 265 0 pmappl 232 438 0 422 2 1 1 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 282 0 3 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82519ff0) 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(ffffffff826904e0) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff826904e0) at __mp_lock+0x12e sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f __mp_lock(ffffffff826904e0) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff826904e0) at __mp_lock+0x127 sys/kern/kern_lock.c:147 pageflttrap(ffff800022023690,1) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 usertrap(ffff800022023690) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:384 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffc5e60, count: 5 ddb{0}> trace x86_ipi_db(ffffffff82519ff0) 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(ffffffff826904e0) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff826904e0) at __mp_lock+0x12e sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f __mp_lock(ffffffff826904e0) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff826904e0) at __mp_lock+0x127 sys/kern/kern_lock.c:147 pageflttrap(ffff800022023690,1) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 usertrap(ffff800022023690) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:384 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffc5e60, 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(ffffffff821ff832) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82254ed0,ffffffff82216e99,f5,ffffffff821dd50d) at __assert+0x2b sys/kern/subr_prf.c:154 switchwrite(86128,ffff800022034f70,1) at switchwrite+0x44f sys/net/switchctl.c:245 spec_write(ffff800022034d40) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8064d4e0e8,ffff800022034f70,1,fffffd807f7bf840) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 vn_write(fffffd806cb81b58,ffff800022034f70,1) at vn_write+0x198 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800020ec69d8,3,ffff800022034f70,1,ffff800022035060) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_pwritev(ffff800020ec69d8,ffff800022035018,ffff800022035060) at sys_pwritev+0xb8 sys/kern/vfs_syscalls.c:3338 syscall(ffff8000220350e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000220350e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3ae8f473900, count: 4 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821ff832) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82254ed0,ffffffff82216e99,f5,ffffffff821dd50d) at __assert+0x2b sys/kern/subr_prf.c:154 switchwrite(86128,ffff800022034f70,1) at switchwrite+0x44f sys/net/switchctl.c:245 spec_write(ffff800022034d40) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8064d4e0e8,ffff800022034f70,1,fffffd807f7bf840) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 vn_write(fffffd806cb81b58,ffff800022034f70,1) at vn_write+0x198 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800020ec69d8,3,ffff800022034f70,1,ffff800022035060) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_pwritev(ffff800020ec69d8,ffff800022035018,ffff800022035060) at sys_pwritev+0xb8 sys/kern/vfs_syscalls.c:3338 syscall(ffff8000220350e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000220350e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3ae8f473900, count: -11