login: oLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLoLpanic: kernel diagnostic assertion "TAILQ_EMPTY(&ifp->if_addrhooks)" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if.c", line 1177 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 346032 9221 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff8220ac8a,ffffffff822362bf,499,ffffffff821f282c) at __assert+0x2b sys/kern/subr_prf.c:154 if_detach(ffff800000a9c000) at if_detach+0x618 sys/net/if.c:1178 tun_clone_destroy(ffff800000a9c000) at tun_clone_destroy+0x1c7 sys/net/if_tun.c:278 spec_close(ffff800022b73a60) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd80658660d8,2,fffffd807f7c67e0,ffff800020ab1b40) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd8068df7e58,ffff800020ab1b40) at vn_closefile+0xd8 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8068df7e58,ffff800020ab1b40) at vn_closefile+0xd8 sys/kern/vfs_vnops.c:610 fdrop(fffffd8068df7e58,ffff800020ab1b40) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd8068df7e58,ffff800020ab1b40) at closef+0x11d sys/kern/kern_descrip.c:1257 fdfree(ffff800020ab1b40) at fdfree+0x101 sys/kern/kern_descrip.c:1189 exit1(ffff800020ab1b40,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff800020ab1b40,ffff800022b73cf0,ffff800022b73d40) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800022b73dc0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022b73dc0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 end trace frame: 0xffff800022b73e40, count: 0 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel diagnostic assertion "TAILQ_EMPTY(&ifp->if_addrhooks)" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if.c", line 1177 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff8220ac8a,ffffffff822362bf,499,ffffffff821f282c) at __assert+0x2b sys/kern/subr_prf.c:154 if_detach(ffff800000a9c000) at if_detach+0x618 sys/net/if.c:1178 tun_clone_destroy(ffff800000a9c000) at tun_clone_destroy+0x1c7 sys/net/if_tun.c:278 spec_close(ffff800022b73a60) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd80658660d8,2,fffffd807f7c67e0,ffff800020ab1b40) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd8068df7e58,ffff800020ab1b40) at vn_closefile+0xd8 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8068df7e58,ffff800020ab1b40) at vn_closefile+0xd8 sys/kern/vfs_vnops.c:610 fdrop(fffffd8068df7e58,ffff800020ab1b40) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd8068df7e58,ffff800020ab1b40) at closef+0x11d sys/kern/kern_descrip.c:1257 fdfree(ffff800020ab1b40) at fdfree+0x101 sys/kern/kern_descrip.c:1189 exit1(ffff800020ab1b40,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff800020ab1b40,ffff800022b73cf0,ffff800022b73d40) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800022b73dc0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022b73dc0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbeac0, count: -15 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800022b73860 rbx 0xffff800022b73910 rdx 0xffff800020ab1b40 rcx 0 rax 0 r8 0xffffffff81aac14f kprintf+0x16f r9 0x1 r10 0x25 r11 0x9be3dd7b148b698e r12 0x3000000008 r13 0xffff800022b73870 r14 0x100 r15 0x1 rip 0xffffffff8211e9c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022b73850 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=409640 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab0018,0xffffffff826602c8 process=0xffff800020adc000 user=0xffff800022b6e000, vmspace=0xfffffd807f008730 estcpu=36, cpticks=4, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 65309 332672 0 0 3 0x14200 bored sosplice 97409 121722 51614 0 3 0x82 nanosleep syz-executor.1 21025 244560 51614 0 3 0x82 nanosleep syz-executor.0 51614 24729 58424 0 3 0x82 thrsleep syz-fuzzer 51614 254343 58424 0 3 0x4000082 thrsleep syz-fuzzer 51614 241459 58424 0 3 0x4000082 thrsleep syz-fuzzer 51614 157190 58424 0 3 0x4000082 thrsleep syz-fuzzer 51614 76752 58424 0 3 0x4000082 thrsleep syz-fuzzer 51614 318608 58424 0 3 0x4000082 kqread syz-fuzzer 51614 53195 58424 0 3 0x4000082 thrsleep syz-fuzzer 51614 229283 58424 0 3 0x4000082 thrsleep syz-fuzzer 51614 194097 58424 0 3 0x4000082 thrsleep syz-fuzzer 51614 184248 58424 0 3 0x4000082 thrsleep syz-fuzzer 58424 216516 49690 0 3 0x10008a pause ksh 49690 132520 34751 0 3 0x92 select sshd 69089 93885 1 0 3 0x100083 ttyin getty 34751 79786 1 0 3 0x80 select sshd 17052 38655 31540 74 3 0x100092 bpf pflogd 31540 95559 1 0 3 0x80 netio pflogd 11518 230922 74479 73 3 0x100090 kqread syslogd 74479 433803 1 0 3 0x100082 netio syslogd 80110 397266 1 77 3 0x100090 poll dhclient 86931 475474 1 0 3 0x80 poll dhclient 18780 446400 0 0 3 0x14200 pgzero zerothread 27314 432137 0 0 3 0x14200 aiodoned aiodoned 56499 479967 0 0 3 0x14200 syncer update 97925 158171 0 0 3 0x14200 cleaner cleaner 9221 346032 0 0 7 0x14200 reaper 61040 410083 0 0 3 0x14200 pgdaemon pagedaemon 40835 45598 0 0 3 0x14200 bored crynlk 22890 500374 0 0 3 0x14200 bored crypto 27937 90586 0 0 3 0x40014200 acpi0 acpi0 63405 141351 0 0 3 0x40014200 idle1 45044 321900 0 0 2 0x14200 softnet 50550 287526 0 0 3 0x14200 bored systqmp 33050 356029 0 0 3 0x14200 bored systq 53970 422107 0 0 3 0x40014200 bored softclock 5931 32432 0 0 3 0x40014200 idle0 30925 408085 0 0 3 0x14200 bored smr 1 167589 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9503 6412K 7177K 78643K 11730 0 0 pcb 13 8K 8K 78643K 77 0 0 rtable 84 3K 3K 78643K 524 0 0 ifaddr 110 15K 16K 78643K 325 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1481 0 0 iov 0 0K 8K 78643K 267 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1220 77K 77K 78643K 2090 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 332 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 5 13K 25K 78643K 933 0 0 proc 60 63K 95K 78643K 572 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 125 0 0 in_multi 13 0K 2K 78643K 85 0 0 ether_multi 1 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 42 185K 185K 78643K 42 0 0 exec 0 0K 1K 78643K 333 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 92 21K 21K 78643K 3021 0 0 UVM aobj 25 2K 2K 78643K 25 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 66 0 0 NDP 11 0K 0K 78643K 66 0 0 temp 125 3550K 3617K 78643K 47790 0 0 kqueue 0 0K 0K 78643K 11 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> 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 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 35 0 33 1 0 1 1 0 8 0 rtentry 112 45 0 13 2 0 2 2 0 8 0 unpcb 120 383 0 373 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 5 0 5 1 0 1 1 0 8 1 tcpcb 544 111 0 106 1 0 1 1 0 8 0 inpcb 280 777 0 768 1 0 1 1 0 8 0 nd6 48 4 0 4 1 1 0 1 0 8 0 ppxss 1128 53 0 52 2 1 1 1 0 8 0 pffrag 232 29 0 29 1 0 1 1 0 482 1 pffrnode 88 29 0 29 1 0 1 1 0 8 1 pffrent 40 1305 0 1305 1 0 1 1 0 8 1 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 52 0 17 1 0 1 1 0 8 0 pfstkey 112 52 0 17 2 0 2 2 0 8 0 pfstate 328 52 0 17 4 0 4 4 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 256 212 0 78 14 4 10 14 0 8 0 art_table 32 213 0 78 2 0 2 2 0 8 0 art_node 16 44 0 14 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 14 1 1 0 1 0 8 0 semapl 112 330 0 320 1 0 1 1 0 8 0 shmpl 112 23 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3369 0 1965 46 0 46 46 0 8 0 ffsino 272 3369 0 1965 94 0 94 94 0 8 0 nchpl 144 4834 0 3217 61 1 60 61 0 8 0 uvmvnodes 72 3734 0 0 68 0 68 68 0 8 0 vnodes 208 3734 0 0 197 0 197 197 0 8 0 namei 1024 12713 0 12713 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 12391 0 12391 5 4 1 4 0 8 1 plimitpl 152 60 0 52 1 0 1 1 0 8 0 sigapl 432 1131 0 1116 3 1 2 3 0 8 0 futexpl 56 15560 0 15560 1 0 1 1 0 8 1 knotepl 112 120 0 101 1 0 1 1 0 8 0 kqueuepl 104 108 0 105 1 0 1 1 0 8 0 pipepl 160 574 0 553 1 0 1 1 0 8 0 fdescpl 488 1132 0 1116 3 0 3 3 0 8 0 filepl 152 6066 0 5957 6 1 5 5 0 8 0 lockfpl 104 357 0 356 1 0 1 1 0 8 0 lockfspl 48 174 0 173 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 1013 0 1004 1 0 1 1 0 8 0 zombiepl 144 1117 0 1115 1 0 1 1 0 8 0 processpl 896 1148 0 1115 4 0 4 4 0 8 0 procpl 632 2265 0 2222 5 0 5 5 0 8 1 sosppl 128 24 0 24 1 1 0 1 0 8 0 sockpl 384 1196 0 1175 4 0 4 4 0 8 1 mcl64k 65536 20 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 1 2 3 0 8 0 mcl4k 4096 18 0 0 3 0 3 3 0 8 0 mcl2k 2048 98 0 0 11 0 11 11 0 8 0 mtagpl 80 39 0 0 1 0 1 1 0 8 0 mbufpl 256 330 0 0 20 0 20 20 0 8 0 bufpl 256 7820 0 1309 407 0 407 407 0 8 0 anonpl 16 88471 0 85193 18 2 16 16 0 124 0 amapchunkpl 152 4070 0 3979 6 2 4 6 0 158 0 amappl16 192 4540 0 4419 9 0 9 9 0 8 2 amappl15 184 434 0 432 1 0 1 1 0 8 0 amappl14 176 63 0 54 1 0 1 1 0 8 0 amappl12 160 6 0 5 2 1 1 1 0 8 0 amappl11 152 50 0 35 1 0 1 1 0 8 0 amappl10 144 14 0 8 1 0 1 1 0 8 0 amappl9 136 1069 0 1064 1 0 1 1 0 8 0 amappl8 128 614 0 595 1 0 1 1 0 8 0 amappl7 120 46 0 41 1 0 1 1 0 8 0 amappl6 112 58 0 49 1 0 1 1 0 8 0 amappl5 104 126 0 113 1 0 1 1 0 8 0 amappl4 96 1374 0 1347 1 0 1 1 0 8 0 amappl3 88 171 0 163 1 0 1 1 0 8 0 amappl2 80 8647 0 8574 3 1 2 3 0 8 0 amappl1 72 29002 0 28568 26 16 10 20 0 8 0 amappl 80 2499 0 2462 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 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 24 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1132 0 1116 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1132 0 1116 1 0 1 1 0 8 0 vmmpekpl 168 9657 0 9619 2 0 2 2 0 8 0 vmmpepl 168 133660 0 132416 88 27 61 80 0 357 2 vmsppl 368 1131 0 1116 2 0 2 2 0 8 0 pdppl 4096 2271 0 2232 6 0 6 6 0 8 0 pvpl 32 353557 0 347092 117 27 90 117 0 265 33 pmappl 232 1131 0 1116 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 573 0 8 17 0 17 17 0 8 0