bX,gh WXaE-G뿳pxkrY8럣panic: kernel diagnostic assertion "la != NULL" failed: file "/syzkaller/managers/main/kernel/sys/netinet/if_ether.c", line 342 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *421961 28991 0 0 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:212 __assert(ffffffff81f7d667,ffffffff81f9487f,156,ffffffff81f59cb3) at __assert+0x2e sys/kern/subr_prf.c:159 arpresolve(ffff8000001722a8,fffffd8030101938,fffffd803702c200,fffffd803ebb3a58,ffff80001493c9b8) at arpresolve+0x839 sys/netinet/if_ether.c:342 ether_resolve(ffff8000001722a8,fffffd803702c200,fffffd803ebb3a58,fffffd8030101938,ffff80001493c9b8) at ether_resolve+0x20d sys/net/if_ethersubr.c:211 ether_output(ffff8000001722a8,fffffd803702c200,fffffd803ebb3a58,fffffd8030101938) at ether_output+0x47 ether_encap sys/net/if_ethersubr.c:307 [inline] ether_output(ffff8000001722a8,fffffd803702c200,fffffd803ebb3a58,fffffd8030101938) at ether_output+0x47 sys/net/if_ethersubr.c:336 ip_output(fffffd803702c200,0,fffffd803ebb3a48,800,0,fffffd803ebb39d8) at ip_output+0x10be sys/netinet/ip_output.c:470 tcp_output(ffff800000990660) at tcp_output+0x2544 sys/netinet/tcp_output.c:1040 tcp_usrreq(fffffd803ebb4a80,4,0,fffffd803f02f000,0,ffff800015a152d8) at tcp_usrreq+0x23b sys_connect(ffff800015a152d8,ffff80001493ce28,ffff80001493ce90) at sys_connect+0x3dc sys/kern/uipc_syscalls.c:388 syscall(ffff80001493cf00) at syscall+0x511 Xsyscall(6,0,fffffffffffffee1,0,3,fad76e21010) at Xsyscall+0x128 end of kernel end trace frame: 0xfafee6ed270, count: 3 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic kernel diagnostic assertion "la != NULL" failed: file "/syzkaller/managers/main/kernel/sys/netinet/if_ether.c", line 342 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:212 __assert(ffffffff81f7d667,ffffffff81f9487f,156,ffffffff81f59cb3) at __assert+0x2e sys/kern/subr_prf.c:159 arpresolve(ffff8000001722a8,fffffd8030101938,fffffd803702c200,fffffd803ebb3a58,ffff80001493c9b8) at arpresolve+0x839 sys/netinet/if_ether.c:342 ether_resolve(ffff8000001722a8,fffffd803702c200,fffffd803ebb3a58,fffffd8030101938,ffff80001493c9b8) at ether_resolve+0x20d sys/net/if_ethersubr.c:211 ether_output(ffff8000001722a8,fffffd803702c200,fffffd803ebb3a58,fffffd8030101938) at ether_output+0x47 ether_encap sys/net/if_ethersubr.c:307 [inline] ether_output(ffff8000001722a8,fffffd803702c200,fffffd803ebb3a58,fffffd8030101938) at ether_output+0x47 sys/net/if_ethersubr.c:336 ip_output(fffffd803702c200,0,fffffd803ebb3a48,800,0,fffffd803ebb39d8) at ip_output+0x10be sys/netinet/ip_output.c:470 tcp_output(ffff800000990660) at tcp_output+0x2544 sys/netinet/tcp_output.c:1040 tcp_usrreq(fffffd803ebb4a80,4,0,fffffd803f02f000,0,ffff800015a152d8) at tcp_usrreq+0x23b sys_connect(ffff800015a152d8,ffff80001493ce28,ffff80001493ce90) at sys_connect+0x3dc sys/kern/uipc_syscalls.c:388 syscall(ffff80001493cf00) at syscall+0x511 Xsyscall(6,0,fffffffffffffee1,0,3,fad76e21010) at Xsyscall+0x128 end of kernel end trace frame: 0xfafee6ed270, count: -12 ddb> show registers rdi 0xffffffff81386407 db_enter+0x17 rsi 0x3cdc __ALIGN_SIZE+0x2cdc rbp 0xffff80001493c780 rbx 0xffff80001493c830 rdx 0x3cdd __ALIGN_SIZE+0x2cdd rcx 0xffff800016bf5000 rax 0xffff800016bf5000 r8 0xffff80001493c740 r9 0x1 r10 0xffff800000994b00 r11 0x4c7257848869cb01 r12 0x3000000008 r13 0xffff80001493c790 r14 0x100 r15 0x1 rip 0xffffffff81386408 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001493c770 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=421961 stat=onproc flags process=0 proc=4000000 pri=76, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff800015a14720,0xffffffff822a6460 process=0xffff8000ffff7708 user=0xffff800014937000, vmspace=0xfffffd803f013840 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 28991 401248 57601 0 2 0 syz-executor.0 *28991 421961 57601 0 7 0x4000000 syz-executor.0 30527 287439 1 0 3 0x100083 ttyin getty 76301 261277 0 0 3 0x14200 bored sosplice 68530 165357 5501 0 2 0x2 syz-executor.1 57601 107511 5501 0 2 0x482 syz-executor.0 5501 38207 36459 0 3 0x82 thrsleep syz-fuzzer 5501 438276 36459 0 3 0x4000082 nanosleep syz-fuzzer 5501 231237 36459 0 3 0x4000082 thrsleep syz-fuzzer 5501 481922 36459 0 3 0x4000082 thrsleep syz-fuzzer 5501 373250 36459 0 3 0x4000082 thrsleep syz-fuzzer 5501 472164 36459 0 3 0x4000082 kqread syz-fuzzer 5501 316156 36459 0 3 0x4000082 thrsleep syz-fuzzer 5501 46160 36459 0 3 0x4000082 thrsleep syz-fuzzer 36459 259510 70511 0 3 0x10008a pause ksh 70511 86492 5399 0 3 0x92 select sshd 5399 458604 1 0 3 0x80 select sshd 65989 93055 95005 73 3 0x100090 kqread syslogd 95005 443145 1 0 3 0x100082 netio syslogd 14629 490564 1 77 3 0x100090 poll dhclient 81051 421652 1 0 3 0x80 poll dhclient 75176 480244 0 0 2 0x14200 zerothread 71285 97928 0 0 3 0x14200 aiodoned aiodoned 98605 439580 0 0 3 0x14200 syncer update 31082 302421 0 0 3 0x14200 cleaner cleaner 51588 436657 0 0 3 0x14200 reaper reaper 18305 190706 0 0 3 0x14200 pgdaemon pagedaemon 48529 430971 0 0 3 0x14200 bored crynlk 32290 368381 0 0 3 0x14200 bored crypto 83135 515132 0 0 3 0x40014200 acpi0 acpi0 93181 372724 0 0 3 0x14200 bored softnet 96348 336310 0 0 3 0x14200 bored systqmp 27891 71547 0 0 3 0x14200 bored systq 57432 116888 0 0 3 0x40014200 bored softclock 95840 35377 0 0 3 0x40014200 idle0 16216 238998 0 0 3 0x14200 bored smr 1 118005 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9510 6365K 7001K 78643K 17235 0 0 pcb 23 9K 10K 78643K 15028 0 0 rtable 990 65K 66K 78643K 30789 0 0 ifaddr 59 14K 15K 78643K 299 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 135 0 0 iov 0 0K 32K 78643K 389 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1204 76K 76K 78643K 3835 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 29 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 12 0K 0K 78643K 244 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12537 0 0 file desc 5 13K 25K 78643K 10799 0 0 sigio 0 0K 0K 78643K 68 0 0 proc 42 30K 54K 78643K 622 0 0 subproc 32 2K 2K 78643K 34 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 301 0 0 in_multi 33 2K 2K 78643K 120 0 0 ether_multi 1 0K 0K 78643K 13 0 0 mrt 0 0K 0K 78643K 8 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 84 371K 371K 78643K 84 0 0 exec 0 0K 1K 78643K 387 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 86 20K 29K 78643K 23594 0 0 UVM aobj 113 3K 3K 78643K 123 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 1K 78643K 93 0 0 NDP 12 0K 0K 78643K 79 0 0 temp 985 2724K 2796K 78643K 28453 0 0 kqueue 0 0K 0K 78643K 25 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 0 1 0 1 1 0 8 0 inpcbpl 280 2652 0 2644 1 0 1 1 0 8 0 plimitpl 152 93 0 86 1 0 1 1 0 8 0 rtentry 112 821 0 756 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpcb 544 1555 0 1550 1 0 1 1 0 8 0 nd6 48 6 0 0 1 0 1 1 0 8 0 ppxss 1128 49 0 49 9 9 0 1 0 8 0 art_heap8 4096 19 0 0 19 0 19 19 0 8 0 art_heap4 256 189 0 0 12 0 12 12 0 8 0 art_table 32 208 0 0 2 0 2 2 0 8 0 art_node 16 65 0 6 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 242 0 232 1 0 1 1 0 8 0 shmpl 112 121 0 10 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 14106 0 12665 47 0 47 47 0 8 0 ffsino 240 14106 0 12665 86 0 86 86 0 8 0 nchpl 144 26644 0 25019 61 0 61 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 200 5926 0 0 312 0 312 312 0 8 0 namei 1024 65350 0 65350 2 1 1 1 0 8 1 scsiplug 64 9 0 9 5 4 1 1 0 8 1 scxspl 192 81290 0 81290 13 10 3 6 0 8 3 sigapl 432 10973 0 10960 2 0 2 2 0 8 0 futexpl 56 88621 0 88621 1 0 1 1 0 8 1 knotepl 112 519 0 500 1 0 1 1 0 8 0 kqueuepl 104 654 0 652 1 0 1 1 0 8 0 pipepl 112 2302 0 2283 5 4 1 2 0 8 0 fdescpl 424 10974 0 10960 2 0 2 2 0 8 0 filepl 120 42669 0 42574 9 5 4 4 0 8 1 lockfpl 104 1043 0 1043 7 6 1 1 0 8 1 lockfspl 48 376 0 376 7 6 1 1 0 8 1 sessionpl 112 20 0 10 1 0 1 1 0 8 0 pgrppl 48 72 0 62 1 0 1 1 0 8 0 ucredpl 96 4080 0 4073 1 0 1 1 0 8 0 zombiepl 144 10960 0 10960 2 1 1 1 0 8 1 processpl 840 10989 0 10960 4 0 4 4 0 8 0 procpl 600 22798 0 22761 4 0 4 4 0 8 0 sosppl 128 46 0 46 11 11 0 1 0 8 0 sockpl 384 17495 0 17477 3 0 3 3 0 8 1 mcl64k 65536 335 0 335 41 40 1 29 0 8 1 mcl16k 16384 10 0 10 7 7 0 1 0 8 0 mcl12k 12288 70 0 70 12 11 1 1 0 8 1 mcl9k 9216 40 0 40 14 13 1 1 0 8 1 mcl8k 8192 80 0 80 15 15 0 1 0 8 0 mcl4k 4096 185 0 185 8 7 1 1 0 8 1 mcl2k2 2112 33 0 33 8 8 0 1 0 8 0 mcl2k 2048 71609 0 71570 14 8 6 9 0 8 0 mtagpl 80 12 0 12 3 3 0 1 0 8 0 mbufpl 256 194199 0 194012 34 20 14 19 0 8 0 bufpl 256 20588 0 16043 285 0 285 285 0 8 0 anonpl 16 687430 0 677301 106 61 45 58 0 62 0 amapchunkpl 152 35820 0 35719 17 12 5 9 0 158 0 amappl16 192 42143 0 41592 88 59 29 40 0 8 0 amappl15 184 10771 0 10769 1 0 1 1 0 8 0 amappl14 176 5390 0 5387 2 1 1 1 0 8 0 amappl12 160 12 0 11 1 0 1 1 0 8 0 amappl11 152 51 0 37 1 0 1 1 0 8 0 amappl10 144 63 0 62 2 1 1 1 0 8 0 amappl9 136 547 0 543 1 0 1 1 0 8 0 amappl8 128 131 0 117 1 0 1 1 0 8 0 amappl7 120 33 0 28 1 0 1 1 0 8 0 amappl6 112 53 0 45 1 0 1 1 0 8 0 amappl5 104 165 0 155 1 0 1 1 0 8 0 amappl4 96 5789 0 5768 1 0 1 1 0 8 0 amappl3 88 10997 0 10983 1 0 1 1 0 8 0 amappl2 80 92440 0 92373 4 2 2 3 0 8 0 amappl1 72 207259 0 206850 24 15 9 19 0 8 0 amappl 80 23052 0 23018 1 0 1 1 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 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 122 0 10 2 0 2 2 0 8 0 uaddrrnd 24 10974 0 10960 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10974 0 10960 1 0 1 1 0 8 0 vmmpekpl 168 45494 0 45469 2 0 2 2 0 8 0 vmmpepl 168 1066320 0 1064808 122 49 73 81 0 357 0 vmsppl 264 10973 0 10960 2 1 1 2 0 8 0 pdppl 4096 21954 0 21920 6 1 5 6 0 8 0 pvpl 32 1942052 0 1928877 243 112 131 147 0 265 19 pmappl 200 10973 0 10960 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 535 0 101 13 0 13 13 0 8 0