kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Mon Mar 25 20:15:34 PDT 2019 OpenBSD/amd64 (ci-openbsd-multicore-8.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.93' (ECDSA) to the list of known hosts. 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 140082 93936 0 0x2 0 0 syz-executor5560 *497708 93936 0 0x2 0x4000000 1K syz-executor5560 db_enter() at db_enter+0x18 panic() at panic+0x174 __assert(ffffffff81f7cec5,ffffffff81f805b4,36f,ffffffff81f8b307) at __assert+0x2e unveil_check_final(ffff800020b74bc8,ffff800020baf858) at unveil_check_final+0x81d namei(ffff800020baf858) at namei+0x88b domknodat(ffff800020b74bc8,ffffff9c,200001c0,80002000,0) at domknodat+0xa1 syscall(ffff800020bafb20) at syscall+0x5b8 Xsyscall(6,0,f17d2a150b8,0,f17d2a15098,f17d2a15090) at Xsyscall+0x128 end of kernel end trace frame: 0xf1a48b184a0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 879 ddb{1}> trace db_enter() at db_enter+0x18 panic() at panic+0x174 __assert(ffffffff81f7cec5,ffffffff81f805b4,36f,ffffffff81f8b307) at __assert+0x2e unveil_check_final(ffff800020b74bc8,ffff800020baf858) at unveil_check_final+0x81d namei(ffff800020baf858) at namei+0x88b domknodat(ffff800020b74bc8,ffffff9c,200001c0,80002000,0) at domknodat+0xa1 syscall(ffff800020bafb20) at syscall+0x5b8 Xsyscall(6,0,f17d2a150b8,0,f17d2a15098,f17d2a15090) at Xsyscall+0x128 end of kernel end trace frame: 0xf1a48b184a0, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020baf5f0 rbx 0xffff800020baf6a0 rdx 0xffffffff81f8b3e6 apollo_pio_rec+0x9d5d rcx 0x201 rax 0x1 r8 0xffffffff81b94ad3 kprintf+0x183 r9 0x1 r10 0x9685aa1b0435d159 r11 0x86827688bbad73f3 r12 0x3000000008 r13 0xffff800020baf600 r14 0x100 r15 0x1 rip 0xffffffff81d528d8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020baf5e0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor5560) pid=497708 stat=onproc flags process=2 proc=4000000 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020b744c0,0xffffffff82377160 process=0xffff800020b2b3c0 user=0xffff800020baa000, vmspace=0xfffffd806e812710 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 93936 140082 53006 0 7 0x2 syz-executor5560 *93936 497708 53006 0 7 0x4000002 syz-executor5560 53006 297259 22786 0 3 0x10008a pause ksh 22786 463269 46051 0 3 0x92 select sshd 1687 169554 1 0 3 0x100083 ttyin getty 46051 136281 1 0 3 0x80 select sshd 71607 236132 99353 74 3 0x100092 bpf pflogd 99353 439166 1 0 3 0x80 netio pflogd 13411 472475 82099 73 3 0x100090 kqread syslogd 82099 408509 1 0 3 0x100082 netio syslogd 80212 129181 1 77 3 0x100090 poll dhclient 64691 178865 1 0 3 0x80 poll dhclient 85920 259252 0 0 3 0x14200 pgzero zerothread 26943 16513 0 0 3 0x14200 aiodoned aiodoned 39977 125953 0 0 3 0x14200 syncer update 73575 72127 0 0 3 0x14200 cleaner cleaner 79433 480712 0 0 3 0x14200 reaper reaper 85787 208347 0 0 3 0x14200 pgdaemon pagedaemon 7816 16932 0 0 3 0x14200 bored crynlk 92046 392624 0 0 3 0x14200 bored crypto 79411 345533 0 0 3 0x40014200 acpi0 acpi0 98333 79294 0 0 3 0x40014200 idle1 58976 270733 0 0 3 0x14200 bored softnet 73265 314078 0 0 3 0x14200 bored systqmp 94028 321940 0 0 3 0x14200 bored systq 65040 522553 0 0 3 0x40014200 bored softclock 37861 199200 0 0 3 0x40014200 idle0 35683 210542 0 0 3 0x14200 bored smr 1 32698 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 93936 (syz-executor5560) thread 0xffff800020b74bc8 (497708) exclusive rrwlock inode r = 0 (0xfffffd806ed1ee78) 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 (0xffffffff823e9b78) locked @ /syzkaller/managers/multicore/kernel/sys/sys/syscall_mi.h:90 #0 witness_lock+0x594 #1 syscall+0x48b #2 Xsyscall+0x128 ddb{1}> 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 70K 78643K 283 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 56 3K 3K 78643K 770 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{1}> 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 14 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 2 1 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 2 1 0 1 1 0 8 0 pfstkey 112 8 0 2 1 0 1 1 0 8 0 pfstate 328 8 0 2 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 96 0 0 6 0 6 6 0 8 0 art_table 32 97 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 3563 0 3562 3 2 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 2444 0 2444 8 7 1 6 0 8 1 sigapl 432 205 0 193 2 0 2 2 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 3 2 1 1 0 8 0 fdescpl 488 206 0 193 3 0 3 3 0 8 0 filepl 152 961 0 914 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 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 52 0 43 1 0 1 1 0 8 0 zombiepl 144 193 0 193 3 2 1 1 0 8 1 processpl 840 221 0 193 4 0 4 4 0 8 0 procpl 600 222 0 193 3 0 3 3 0 8 0 sockpl 384 73 0 55 2 0 2 2 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 78 0 0 10 1 9 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 96 0 0 6 0 6 6 0 8 0 bufpl 256 2165 0 275 119 0 119 119 0 8 0 anonpl 16 19338 0 18096 9 3 6 7 0 125 1 amapchunkpl 152 563 0 524 2 0 2 2 0 158 0 amappl16 192 31 0 29 1 0 1 1 0 8 0 amappl15 184 53 0 49 1 0 1 1 0 8 0 amappl14 176 16 0 15 3 2 1 1 0 8 0 amappl13 168 23 0 20 1 0 1 1 0 8 0 amappl12 160 7 0 7 2 1 1 1 0 8 1 amappl11 152 25 0 10 1 0 1 1 0 8 0 amappl10 144 59 0 57 1 0 1 1 0 8 0 amappl9 136 424 0 423 1 0 1 1 0 8 0 amappl8 128 99 0 94 1 0 1 1 0 8 0 amappl7 120 16 0 15 1 0 1 1 0 8 0 amappl6 112 43 0 39 1 0 1 1 0 8 0 amappl5 104 117 0 104 1 0 1 1 0 8 0 amappl4 96 439 0 412 1 0 1 1 0 8 0 amappl3 88 104 0 98 1 0 1 1 0 8 0 amappl2 80 652 0 606 1 0 1 1 0 8 0 amappl1 72 13692 0 13262 15 5 10 15 0 8 0 amappl 72 431 0 409 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 24 206 0 193 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 206 0 193 1 0 1 1 0 8 0 vmmpekpl 168 5607 0 5586 2 0 2 2 0 8 0 vmmpepl 168 27329 0 26520 52 15 37 46 0 357 1 vmsppl 360 205 0 193 2 0 2 2 0 8 0 pdppl 4096 420 0 386 6 0 6 6 0 8 0 pvpl 32 82096 0 78988 40 11 29 29 0 265 1 pmappl 224 205 0 193 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 252 0 6 8 0 8 8 0 8 0 ddb{1}>