kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Tue Mar 26 08:35:06 PDT 2019 OpenBSD/amd64 (ci-openbsd-multicore-6.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.15.205' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program login: panic: kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 879 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 376091 9026 0 0 0 1 syz-executor7271 *101761 80030 0 0 0x4000000 0K syz-executor7271 db_enter() at db_enter+0x18 panic() at panic+0x174 __assert(ffffffff81f7e6d6,ffffffff81f80d6e,36f,ffffffff81f8ba8b) at __assert+0x2e unveil_check_final(ffff800020b152c8,ffff800020bdf9b8) at unveil_check_final+0x81d namei(ffff800020bdf9b8) at namei+0x88b domknodat(ffff800020b152c8,ffffff9c,20000180,2130,5) at domknodat+0xa1 syscall(ffff800020bdfc80) at syscall+0x5b8 Xsyscall(6,0,8ae7d8be0c8,0,8ae7d8be0a8,8ae7d8be0a0) at Xsyscall+0x128 end of kernel end trace frame: 0x8b16b053ae0, count: 7 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 "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 879 ddb{0}> trace db_enter() at db_enter+0x18 panic() at panic+0x174 __assert(ffffffff81f7e6d6,ffffffff81f80d6e,36f,ffffffff81f8ba8b) at __assert+0x2e unveil_check_final(ffff800020b152c8,ffff800020bdf9b8) at unveil_check_final+0x81d namei(ffff800020bdf9b8) at namei+0x88b domknodat(ffff800020b152c8,ffffff9c,20000180,2130,5) at domknodat+0xa1 syscall(ffff800020bdfc80) at syscall+0x5b8 Xsyscall(6,0,8ae7d8be0c8,0,8ae7d8be0a8,8ae7d8be0a0) at Xsyscall+0x128 end of kernel end trace frame: 0x8b16b053ae0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020bdf750 rbx 0xffff800020bdf800 rdx 0xffffffff81f8c339 apollo_pio_rec+0x95b5 rcx 0x201 rax 0x1 r8 0xffffffff818d1a13 kprintf+0x183 r9 0x1 r10 0x461bbdd65d89ae6a r11 0xb1f876630ff8a518 r12 0x3000000008 r13 0xffff800020bdf760 r14 0x100 r15 0x1 rip 0xffffffff814367b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020bdf740 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor7271) pid=101761 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b14008,0xffff800020b14270 process=0xffff800020b8cd38 user=0xffff800020bda000, vmspace=0xfffffd807effd9d8 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 9026 376091 54658 0 7 0 syz-executor7271 9026 474415 54658 0 3 0x4000080 fsleep syz-executor7271 9026 336502 54658 0 2 0x4000000 syz-executor7271 80030 411806 11518 0 2 0x480 syz-executor7271 *80030 101761 11518 0 7 0x4000000 syz-executor7271 80030 489228 11518 0 3 0x4000080 fsleep syz-executor7271 11518 252752 92772 0 3 0x80 nanosleep syz-executor7271 54658 413907 92772 0 3 0x80 nanosleep syz-executor7271 92772 496850 54984 0 3 0x82 nanosleep syz-executor7271 54984 192383 89704 0 3 0x10008a pause ksh 89704 150937 93575 0 3 0x92 select sshd 58346 304889 1 0 3 0x100083 ttyin getty 93575 373095 1 0 3 0x80 select sshd 80832 72326 61960 74 3 0x100092 bpf pflogd 61960 250546 1 0 3 0x80 netio pflogd 13029 408087 16145 73 3 0x100090 kqread syslogd 16145 125233 1 0 3 0x100082 netio syslogd 9367 424875 1 77 3 0x100090 poll dhclient 45905 187596 1 0 3 0x80 poll dhclient 47682 48569 0 0 2 0x14200 zerothread 70941 173055 0 0 3 0x14200 aiodoned aiodoned 30053 510874 0 0 3 0x14200 syncer update 10696 229211 0 0 3 0x14200 cleaner cleaner 9670 45531 0 0 3 0x14200 reaper reaper 56543 307608 0 0 3 0x14200 pgdaemon pagedaemon 89077 76928 0 0 3 0x14200 bored crynlk 84691 205286 0 0 3 0x14200 bored crypto 70470 357640 0 0 3 0x40014200 acpi0 acpi0 69476 385566 0 0 3 0x40014200 idle1 80064 298442 0 0 3 0x14200 bored softnet 91343 68779 0 0 3 0x14200 bored systqmp 33146 508596 0 0 3 0x14200 bored systq 96470 504258 0 0 3 0x40014200 bored softclock 53288 483838 0 0 3 0x40014200 idle0 79061 490652 0 0 3 0x14200 bored smr 1 435009 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 80030 (syz-executor7271) thread 0xffff800020b152c8 (101761) exclusive rrwlock inode r = 0 (0xfffffd806ed1bd68) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_vnops.c:1547 #0 witness_lock+0x594 #1 _rw_enter+0x45d #2 _rrw_enter+0x60 #3 VOP_LOCK+0x57 #4 vn_lock+0x6e #5 vfs_lookup+0xf5 #6 namei+0x4b2 #7 domknodat+0xa1 #8 syscall+0x5b8 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82349ce8) locked @ /syzkaller/managers/multicore/kernel/sys/sys/syscall_mi.h:90 #0 witness_lock+0x594 #1 syscall+0x48b #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9450 6382K 6383K 78643K 10537 0 0 pcb 25 9K 9K 78643K 57 0 0 rtable 61 2K 2K 78643K 125 0 0 ifaddr 25 7K 7K 78643K 26 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1467 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1168 73K 73K 78643K 1173 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 2 0K 0K 78643K 2 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 1 0K 0K 78643K 1 0 0 proc 55 62K 83K 78643K 319 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 11 0K 0K 78643K 11 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 18 79K 79K 78643K 18 0 0 exec 0 0K 1K 78643K 179 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 66 19K 19K 78643K 809 0 0 UVM aobj 2 2K 2K 78643K 2 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 4 0K 0K 78643K 4 0 0 temp 39 2360K 2424K 78643K 1999 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 2 0 0 1 0 1 1 0 8 0 inpcbpl 280 29 0 23 1 0 1 1 0 8 0 plimitpl 152 16 0 8 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 syncache 264 5 0 5 1 0 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 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 8 0 0 1 0 1 1 0 8 0 pfstkey 112 8 0 0 1 0 1 1 0 8 0 pfstate 328 8 0 0 1 0 1 1 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 97 0 0 7 0 7 7 0 8 0 art_table 32 98 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1392 0 18 45 0 45 45 0 8 0 ffsino 272 1392 0 18 92 0 92 92 0 8 0 nchpl 144 1565 0 32 57 0 57 57 0 8 0 uvmvnodes 72 1402 0 0 26 0 26 26 0 8 0 vnodes 200 1402 0 0 74 0 74 74 0 8 0 namei 1024 3580 0 3579 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 2328 0 2328 2 1 1 2 0 8 1 sigapl 432 218 0 202 2 0 2 2 0 8 0 futexpl 56 16 0 14 1 0 1 1 0 8 0 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 104 1 0 0 1 0 1 1 0 8 0 pipepl 112 134 0 127 2 1 1 1 0 8 0 fdescpl 488 219 0 202 4 1 3 3 0 8 0 filepl 152 960 0 913 2 0 2 2 0 8 0 lockfpl 104 6 0 6 1 1 0 1 0 8 0 lockfspl 32 3 0 3 1 1 0 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 52 0 43 1 0 1 1 0 8 0 zombiepl 144 202 0 202 2 1 1 1 0 8 1 processpl 840 234 0 202 4 0 4 4 0 8 0 procpl 600 247 0 211 3 0 3 3 0 8 0 sockpl 384 73 0 55 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 69 0 0 9 0 9 9 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 87 0 0 5 0 5 5 0 8 0 bufpl 256 2166 0 275 119 0 119 119 0 8 0 anonpl 16 19784 0 18452 8 2 6 7 0 125 0 amapchunkpl 152 605 0 558 2 0 2 2 0 158 0 amappl16 192 40 0 37 1 0 1 1 0 8 0 amappl15 184 53 0 49 1 0 1 1 0 8 0 amappl14 176 16 0 15 2 1 1 1 0 8 0 amappl13 168 22 0 19 1 0 1 1 0 8 0 amappl12 160 6 0 6 1 0 1 1 0 8 1 amappl11 152 25 0 10 1 0 1 1 0 8 0 amappl10 144 56 0 54 1 0 1 1 0 8 0 amappl9 136 412 0 411 1 0 1 1 0 8 0 amappl8 128 114 0 105 1 0 1 1 0 8 0 amappl7 120 16 0 15 1 0 1 1 0 8 0 amappl6 112 46 0 41 1 0 1 1 0 8 0 amappl5 104 142 0 129 1 0 1 1 0 8 0 amappl4 96 429 0 406 1 0 1 1 0 8 0 amappl3 88 106 0 99 1 0 1 1 0 8 0 amappl2 80 744 0 687 2 0 2 2 0 8 0 amappl1 72 13809 0 13320 16 6 10 16 0 8 0 amappl 72 459 0 429 1 0 1 1 0 75 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 219 0 202 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 219 0 202 1 0 1 1 0 8 0 vmmpekpl 168 5642 0 5621 2 0 2 2 0 8 1 vmmpepl 168 28059 0 27102 55 13 42 50 0 357 0 vmsppl 360 218 0 202 2 0 2 2 0 8 0 pdppl 4096 446 0 404 7 1 6 6 0 8 0 pvpl 32 82963 0 79652 34 5 29 29 0 265 1 pmappl 224 218 0 202 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 251 0 5 8 0 8 8 0 8 0 ddb{0}>