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 *517218 2201 0 0 0x4000000 1K syz-executor.0 130673 17430 0 0x14000 0x200 0 reaper 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(fffffd8061b5d000,ffffffc1) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002e3bf7b0,ffff800000c39400,ffff80002e3bf498,ffff80002e3bf398) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(41700,ffff80002e3bf7b0,1) at bpfwrite+0x169 sys/net/bpf.c:644 spec_write(ffff80002e3bf590) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8064f5bbd8,ffff80002e3bf7b0,1,fffffd807f7d88a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd806a2647d0,ffff80002e3bf7b0,0) at vn_write+0x157 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800022861ce8,5,ffff80002e3bf7b0,0,ffff80002e3bf8b0) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_writev(ffff800022861ce8,ffff80002e3bf858,ffff80002e3bf8b0) at sys_writev+0xa7 sys/kern/sys_generic.c:328 syscall(ffff80002e3bf920) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3bf920) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1474d472170, 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(fffffd8061b5d000,ffffffc1) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002e3bf7b0,ffff800000c39400,ffff80002e3bf498,ffff80002e3bf398) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(41700,ffff80002e3bf7b0,1) at bpfwrite+0x169 sys/net/bpf.c:644 spec_write(ffff80002e3bf590) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8064f5bbd8,ffff80002e3bf7b0,1,fffffd807f7d88a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd806a2647d0,ffff80002e3bf7b0,0) at vn_write+0x157 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800022861ce8,5,ffff80002e3bf7b0,0,ffff80002e3bf8b0) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_writev(ffff800022861ce8,ffff80002e3bf858,ffff80002e3bf8b0) at sys_writev+0xa7 sys/kern/sys_generic.c:328 syscall(ffff80002e3bf920) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3bf920) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1474d472170, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e3bf1b0 rbx 0xffff800020ce9bff rdx 0xffff800000bd89c0 rcx 0 rax 0xffff800022861ce8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x980b94c4d050591f r11 0x44159adb5854d6f4 r12 0xffff800020ce9a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81f80a58 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e3bf1a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=517218 stat=onproc flags process=0 proc=4000000 pri=83, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff8000260a9508,0xffff800022853278 process=0xffff800029524020 user=0xffff80002e3ba000, vmspace=0xfffffd806a8602f0 estcpu=33, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 39441 42082 75839 0 2 0 syz-executor.5 24182 486624 45460 0 2 0 syz-executor.2 24182 159180 45460 0 3 0x4000080 fsleep syz-executor.2 24182 382252 45460 0 2 0x4000000 syz-executor.2 2201 33052 15480 0 2 0 syz-executor.0 2201 337611 15480 0 3 0x4000080 pipewr syz-executor.0 * 2201 517218 15480 0 7 0x4000000 syz-executor.0 60427 394184 31803 0 3 0x82 piperd syz-executor.4 82918 157011 0 0 3 0x14280 nfsidl nfsio 46764 56994 0 0 3 0x14280 nfsidl nfsio 97771 227763 0 0 3 0x14280 nfsidl nfsio 55981 419371 0 0 3 0x14280 nfsidl nfsio 12524 59242 0 0 3 0x14280 nfsidl nfsio 25765 325370 0 0 3 0x14280 nfsidl nfsio 28456 153829 0 0 3 0x14280 nfsidl nfsio 34500 29777 0 0 3 0x14280 nfsidl nfsio 29498 190866 0 0 3 0x14280 nfsidl nfsio 19474 293273 0 0 3 0x14280 nfsidl nfsio 51908 129275 0 0 3 0x14280 nfsidl nfsio 86426 245204 0 0 3 0x14280 nfsidl nfsio 44923 494402 0 0 3 0x14280 nfsidl nfsio 85044 505596 0 0 3 0x14280 nfsidl nfsio 63806 341364 0 0 3 0x14280 nfsidl nfsio 142 489969 0 0 3 0x14280 nfsidl nfsio 98971 161439 0 0 3 0x14280 nfsidl nfsio 4403 398395 0 0 3 0x14280 nfsidl nfsio 18144 332591 0 0 3 0x14280 nfsidl nfsio 76451 159802 0 0 3 0x14280 nfsidl nfsio 75839 200682 31803 0 3 0x82 nanoslp syz-executor.5 45460 97006 31803 0 3 0x82 nanoslp syz-executor.2 44575 377193 0 0 3 0x14200 bored sosplice 82944 281323 31803 0 3 0x82 piperd syz-executor.7 77238 480305 31803 0 3 0x82 piperd syz-executor.6 26256 261935 31803 0 3 0x2 biowait syz-executor.3 22914 204460 31803 0 3 0x82 nanoslp syz-executor.1 15480 419477 31803 0 3 0x82 nanoslp syz-executor.0 31803 232373 8592 0 3 0x82 nanoslp syz-fuzzer 31803 186874 8592 0 3 0x4000082 nanoslp syz-fuzzer 31803 277871 8592 0 3 0x4000082 kqread syz-fuzzer 31803 107894 8592 0 3 0x4000082 thrsleep syz-fuzzer 31803 249434 8592 0 3 0x4000082 thrsleep syz-fuzzer 31803 149543 8592 0 3 0x4000082 thrsleep syz-fuzzer 31803 508991 8592 0 3 0x4000082 thrsleep syz-fuzzer 31803 337876 8592 0 3 0x4000082 thrsleep syz-fuzzer 8592 403454 43134 0 3 0x10008a sigsusp ksh 43134 179873 88957 0 3 0x9a kqread sshd 45011 40679 1 0 3 0x100083 ttyin getty 88957 114753 1 0 3 0x88 kqread sshd 43189 357443 19369 74 3 0x100092 bpf pflogd 19369 521567 1 0 3 0x80 netio pflogd 96227 283728 28645 73 3 0x100090 kqread syslogd 28645 469156 1 0 3 0x100082 netio syslogd 82123 375989 1 0 3 0x100080 kqread resolvd 1874 171098 12038 77 3 0x100092 kqread dhcpleased 23839 312700 12038 77 3 0x100092 kqread dhcpleased 12038 279698 1 0 3 0x80 kqread dhcpleased 80841 44464 0 0 3 0x14200 bored smr 72471 30961 0 0 2 0x14200 zerothread 99865 273595 0 0 3 0x14200 aiodoned aiodoned 13401 39977 0 0 3 0x14200 syncer update 8781 136816 0 0 3 0x14200 cleaner cleaner 17430 130673 0 0 7 0x14200 reaper 26714 413578 0 0 3 0x14200 pgdaemon pagedaemon 32665 313244 0 0 3 0x14200 bored viomb 24530 363646 0 0 3 0x40014200 acpi0 acpi0 53805 102004 0 0 3 0x40014200 idle1 76332 299740 0 0 3 0x14200 bored softnet 67954 480919 0 0 3 0x14200 bored systqmp 37327 82212 0 0 3 0x14200 bored systq 48805 152298 0 0 3 0x40014200 bored softclock 57270 106337 0 0 3 0x40014200 idle0 1 310193 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex pvpl r = 0 (0xffffffff82b390d0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_put+0x8a sys/kern/subr_pool.c:799 #4 pmap_do_remove+0x607 sys/arch/amd64/amd64/pmap.c:1879 #5 uvm_unmap_kill_entry_withlock+0x1af sys/uvm/uvm_map.c:2139 #6 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #6 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #7 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 #8 reaper+0x18b sys/kern/kern_exit.c:462 #9 proc_trampoline+0x1c Process 2201 (syz-executor.0) thread 0xffff800022861ce8 (517218) 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_writev+0xa7 sys/kern/sys_generic.c:328 #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 Process 26256 (syz-executor.3) thread 0xffff8000211c02a0 (261935) exclusive rrwlock inode r = 0 (0xfffffd80630f11a8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3100 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80674b21b0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3085 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10215 6632K 7445K 78643K 27231 0 pcb 13 14K 17K 78643K 620 0 rtable 215 9K 12K 78643K 1056 0 ifaddr 90 18K 20K 78643K 592 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 98 0 ioctlops 0 0K 4K 78643K 2182 0 iov 0 0K 16K 78643K 244 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1437 90K 90K 78643K 5112 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 42 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 564 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 81K 78643K 3658 0 sigio 0 0K 0K 78643K 194 0 proc 70 87K 111K 78643K 738 0 subproc 104 6K 6K 78643K 143 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 154 0 in_multi 81 5K 7K 78643K 225 0 ether_multi 1 0K 0K 78643K 36 0 mrt 1 0K 0K 78643K 43 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 169 758K 758K 78643K 169 0 exec 0 0K 2K 78643K 1123 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 340 279K 284K 78643K 49111 0 UVM aobj 131 8K 8K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 197 0 NDP 13 0K 1K 78643K 57 0 temp 141 4717K 8797K 78643K 55505 0 kqueue 13 20K 28K 78643K 213 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 120 173 0 170 2 1 1 2 0 8 0 rtentry 112 196 0 106 4 0 4 4 0 8 0 unpcb 136 2455 0 2440 23 20 3 7 0 8 2 syncache 296 20 0 20 5 5 0 1 0 8 0 tcpqe 32 5 0 5 2 2 0 1 0 8 0 tcpcb 736 895 0 886 28 25 3 8 0 8 1 arp 120 27 0 9 1 0 1 1 0 8 0 inpcb 304 3158 0 3149 38 34 4 11 0 8 2 rttmr 72 18 0 18 1 1 0 1 0 8 0 nd6 48 38 0 19 1 0 1 1 0 8 0 pkpcb 40 10 0 10 3 3 0 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1248 5 0 5 2 2 0 1 0 8 0 pfstscr 40 10 0 10 2 2 0 1 0 8 0 pffrag 232 62 0 56 2 1 1 1 0 482 0 pffrnode 88 62 0 56 2 1 1 1 0 8 0 pffrent 40 180 0 174 3 2 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 pfrktable 1344 143 0 138 1 0 1 1 0 8 0 pftag 88 10 0 7 1 0 1 1 0 8 0 pfstitem 24 37 0 35 1 0 1 1 0 8 0 pfstkey 112 49 0 47 1 0 1 1 0 8 0 pfstate 320 42 0 40 3 2 1 3 0 8 0 pfrule 1360 199 0 179 5 2 3 3 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 713 0 339 31 5 26 29 0 8 0 art_table 32 714 0 339 4 0 4 4 0 8 0 art_node 16 193 0 114 1 0 1 1 0 8 0 sysvmsgpl 40 56 0 16 1 0 1 1 0 8 0 semapl 112 559 0 549 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6010 0 4575 91 0 91 91 0 8 0 ffsino 272 6010 0 4575 97 0 97 97 0 8 0 nchpl 144 10985 0 9363 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 38454 0 38453 4 3 1 2 0 8 0 percpumem 16 61 0 21 1 0 1 1 0 8 0 vcpupl 2048 18 0 0 3 0 3 3 0 8 0 vmpool 560 27 0 9 2 0 2 2 0 8 0 pfiaddrpl 120 26 0 22 1 0 1 1 0 8 0 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 30968 0 30967 15 14 1 8 0 8 0 plimitpl 152 422 0 407 1 0 1 1 0 8 0 sigapl 424 3975 0 3914 8 0 8 8 0 8 0 futexpl 64 35875 0 35874 2 1 1 1 0 8 0 knotepl 120 205 0 0 6 0 6 6 0 8 0 kqueuepl 216 1405 0 1396 21 20 1 5 0 8 0 pipepl 336 834 0 805 25 22 3 8 0 8 0 fdescpl 496 3939 0 3913 5 1 4 5 0 8 0 filepl 152 26810 0 26569 40 26 14 19 0 8 3 lockfpl 104 979 0 977 3 2 1 2 0 8 0 lockfspl 48 235 0 233 1 0 1 1 0 8 0 sessionpl 144 27 0 10 1 0 1 1 0 8 0 pgrppl 48 27 0 10 1 0 1 1 0 8 0 ucredpl 96 2616 0 2604 1 0 1 1 0 8 0 zombiepl 144 3914 0 3913 1 0 1 1 0 8 0 processpl 1064 3975 0 3913 5 0 5 5 0 8 0 procpl 672 11456 0 11383 16 8 8 9 0 8 0 srpgc 96 4 0 4 2 2 0 1 0 8 0 sosppl 168 17 0 16 6 5 1 1 0 8 0 sockpl 480 5839 0 5812 108 96 12 26 0 8 8 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 10 0 0 2 0 2 2 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 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 20 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 278 0 0 25 0 25 25 0 8 0 mtagpl 96 1464 0 0 36 0 36 36 0 8 0 mbufpl 256 5766 0 0 357 0 357 357 0 8 0 bufpl 288 8857 0 2523 453 0 453 453 0 8 0 anonpl 24 1104410 0 1083496 191 42 149 159 0 186 9 amapchunkpl 152 117238 0 116463 44 7 37 39 0 158 0 amappl16 200 11288 0 10554 72 31 41 52 0 8 0 amappl15 192 767 0 759 1 0 1 1 0 8 0 amappl14 184 212 0 211 1 0 1 1 0 8 0 amappl13 176 101 0 98 1 0 1 1 0 8 0 amappl12 168 392 0 386 1 0 1 1 0 8 0 amappl11 160 770 0 754 1 0 1 1 0 8 0 amappl10 152 298 0 290 1 0 1 1 0 8 0 amappl9 144 1384 0 1379 1 0 1 1 0 8 0 amappl8 136 1162 0 1088 3 0 3 3 0 8 0 amappl7 128 578 0 565 1 0 1 1 0 8 0 amappl6 120 1099 0 1074 2 1 1 2 0 8 0 amappl5 112 3628 0 3607 1 0 1 1 0 8 0 amappl4 104 2002 0 1978 2 1 1 2 0 8 0 amappl3 96 738 0 726 1 0 1 1 0 8 0 amappl2 88 947 0 899 3 1 2 3 0 8 0 amappl1 80 74490 0 73959 19 5 14 19 0 8 0 amappl 88 48483 0 48254 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 3966 0 3922 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3966 0 3922 1 0 1 1 0 8 0 vmmpekpl 168 35399 0 35331 4 0 4 4 0 8 0 vmmpepl 168 358949 0 356464 190 62 128 148 0 357 0 vmsppl 368 3965 0 3921 6 1 5 5 0 8 0 rwobjpl 56 95797 0 88026 117 5 112 115 0 8 0 pdppl 4096 7939 0 7860 186 99 87 89 0 8 8 pvpl 32 1887897 0 1864419 332 99 233 246 0 265 27 pmappl 248 3965 0 3921 5 1 4 4 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1329 0 159 34 0 34 34 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+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b04e78) at __mp_lock+0x12e sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800021135500,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd806a860b90) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd806a860b90) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000210f87e0) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: 7 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+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b04e78) at __mp_lock+0x12e sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800021135500,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd806a860b90) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd806a860b90) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000210f87e0) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: -8 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(fffffd8061b5d000,ffffffc1) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002e3bf7b0,ffff800000c39400,ffff80002e3bf498,ffff80002e3bf398) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(41700,ffff80002e3bf7b0,1) at bpfwrite+0x169 sys/net/bpf.c:644 spec_write(ffff80002e3bf590) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8064f5bbd8,ffff80002e3bf7b0,1,fffffd807f7d88a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd806a2647d0,ffff80002e3bf7b0,0) at vn_write+0x157 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800022861ce8,5,ffff80002e3bf7b0,0,ffff80002e3bf8b0) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_writev(ffff800022861ce8,ffff80002e3bf858,ffff80002e3bf8b0) at sys_writev+0xa7 sys/kern/sys_generic.c:328 syscall(ffff80002e3bf920) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3bf920) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1474d472170, 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(fffffd8061b5d000,ffffffc1) at m_align+0x1a0 sys/kern/uipc_mbuf.c:1385 bpf_movein(ffff80002e3bf7b0,ffff800000c39400,ffff80002e3bf498,ffff80002e3bf398) at bpf_movein+0x25e sys/net/bpf.c:228 bpfwrite(41700,ffff80002e3bf7b0,1) at bpfwrite+0x169 sys/net/bpf.c:644 spec_write(ffff80002e3bf590) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8064f5bbd8,ffff80002e3bf7b0,1,fffffd807f7d88a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_write(fffffd806a2647d0,ffff80002e3bf7b0,0) at vn_write+0x157 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800022861ce8,5,ffff80002e3bf7b0,0,ffff80002e3bf8b0) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_writev(ffff800022861ce8,ffff80002e3bf858,ffff80002e3bf8b0) at sys_writev+0xa7 sys/kern/sys_generic.c:328 syscall(ffff80002e3bf920) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3bf920) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1474d472170, count: -13