kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Sun Mar 24 14:22:14 PDT 2019 OpenBSD/amd64 (ci-openbsd-setuid-1.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.8' (ECDSA) to the list of known hosts. executing program login: panic: kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_unveil.c", line 879 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 183383 31357 0 0x2 0 1 syz-executor4913 * 39688 31357 0 0x2 0x4000000 0K syz-executor4913 db_enter() at db_enter+0x18 panic() at panic+0x174 __assert(ffffffff81f7dcd5,ffffffff81f30eae,36f,ffffffff81f8a767) at __assert+0x2e unveil_check_final(ffff800020b66010,ffff800020b9d050) at unveil_check_final+0x81d namei(ffff800020b9d050) at namei+0x88b vn_open(ffff800020b9d050,1,0) at vn_open+0xc7 doopenat(ffff800020b66010,ffffff9c,20000080,0,0,ffff800020b9d290) at doopenat+0x2ca syscall(ffff800020b9d340) at syscall+0x5b8 Xsyscall(6,0,36683e460b8,0,36683e46098,36683e46090) at Xsyscall+0x128 end of kernel end trace frame: 0x3696635e5e0, count: 6 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/setuid/kernel/sys/kern/kern_unveil.c", line 879 ddb{0}> trace db_enter() at db_enter+0x18 panic() at panic+0x174 __assert(ffffffff81f7dcd5,ffffffff81f30eae,36f,ffffffff81f8a767) at __assert+0x2e unveil_check_final(ffff800020b66010,ffff800020b9d050) at unveil_check_final+0x81d namei(ffff800020b9d050) at namei+0x88b vn_open(ffff800020b9d050,1,0) at vn_open+0xc7 doopenat(ffff800020b66010,ffffff9c,20000080,0,0,ffff800020b9d290) at doopenat+0x2ca syscall(ffff800020b9d340) at syscall+0x5b8 Xsyscall(6,0,36683e460b8,0,36683e46098,36683e46090) at Xsyscall+0x128 end of kernel end trace frame: 0x3696635e5e0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020b9cc90 rbx 0xffff800020b9cd40 rdx 0xffffffff81f1fdc9 cmd0646_9_tim_udma+0x134a6 rcx 0x201 rax 0x1 r8 0xffffffff814ea2c3 kprintf+0x183 r9 0x1 r10 0x39e1bc8fce4a1e79 r11 0x676554c48c2f09b9 r12 0x3000000008 r13 0xffff800020b9cca0 r14 0x100 r15 0x1 rip 0xffffffff81c97598 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020b9cc80 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor4913) pid=39688 stat=onproc flags process=2 proc=4000000 pri=51, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020b66718,0xffffffff82349db8 process=0xffff800020b7c9f0 user=0xffff800020b98000, vmspace=0xfffffd806e9375a8 estcpu=1, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 31357 183383 55925 0 7 0x2 syz-executor4913 *31357 39688 55925 0 7 0x4000002 syz-executor4913 55925 198051 38497 0 3 0x10008a pause ksh 38497 108693 20322 0 3 0x92 select sshd 37301 231762 1 0 3 0x100083 ttyin getty 20322 117040 1 0 3 0x80 select sshd 20632 102024 47569 73 3 0x100090 kqread syslogd 47569 301588 1 0 3 0x100082 netio syslogd 4127 434994 1 77 3 0x100090 poll dhclient 14279 469547 1 0 3 0x80 poll dhclient 43197 83034 0 0 2 0x14200 zerothread 6736 250457 0 0 3 0x14200 aiodoned aiodoned 79449 361635 0 0 3 0x14200 syncer update 54093 378531 0 0 3 0x14200 cleaner cleaner 47987 403877 0 0 3 0x14200 reaper reaper 165 51086 0 0 3 0x14200 pgdaemon pagedaemon 97023 195600 0 0 3 0x14200 bored crynlk 364 115145 0 0 3 0x14200 bored crypto 74174 444483 0 0 3 0x40014200 acpi0 acpi0 83288 18717 0 0 3 0x40014200 idle1 3238 88730 0 0 3 0x14200 bored softnet 62391 252560 0 0 3 0x14200 bored systqmp 47795 386362 0 0 3 0x14200 bored systq 81496 24056 0 0 3 0x40014200 bored softclock 5227 397419 0 0 3 0x40014200 idle0 67601 112452 0 0 3 0x14200 bored smr 1 180746 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 31357 (syz-executor4913) thread 0xffff800020b66010 (39688) exclusive rrwlock inode r = 0 (0xfffffd806e534918) locked @ /syzkaller/managers/setuid/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 vget+0x1c3 #6 cache_lookup+0x300 #7 ufs_lookup+0x1d7 #8 VOP_LOOKUP+0x67 #9 vfs_lookup+0x556 #10 namei+0x4b2 #11 vn_open+0xc7 #12 doopenat+0x2ca #13 syscall+0x5b8 #14 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82350b68) locked @ /syzkaller/managers/setuid/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 9442 6315K 6316K 78643K 10529 0 0 pcb 23 9K 9K 78643K 55 0 0 rtable 61 2K 2K 78643K 115 0 0 ifaddr 21 7K 7K 78643K 21 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 2K 78643K 13 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1166 73K 73K 78643K 1171 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 43 50K 58K 78643K 211 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 152 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 50 2K 3K 78643K 668 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 3 0K 0K 78643K 3 0 0 temp 30 2359K 2423K 78643K 1718 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 22 0 16 1 0 1 1 0 8 0 plimitpl 152 13 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 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 95 0 0 6 0 6 6 0 8 0 art_table 32 96 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 1381 0 16 45 0 45 45 0 8 0 ffsino 272 1381 0 16 91 0 91 91 0 8 0 nchpl 144 1555 0 30 57 0 57 57 0 8 0 uvmvnodes 72 1390 0 0 26 0 26 26 0 8 0 vnodes 200 1390 0 0 74 0 74 74 0 8 0 namei 1024 3286 0 3285 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 2255 0 2255 2 1 1 2 0 8 1 sigapl 432 176 0 166 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 112 118 0 111 2 1 1 1 0 8 0 fdescpl 488 177 0 166 2 0 2 2 0 8 0 filepl 152 819 0 776 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 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 96 47 0 40 1 0 1 1 0 8 0 zombiepl 144 166 0 166 2 1 1 1 0 8 1 processpl 840 192 0 166 4 0 4 4 0 8 0 procpl 600 193 0 166 3 0 3 3 0 8 0 sockpl 384 64 0 48 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 95 0 0 6 0 6 6 0 8 0 bufpl 256 2063 0 254 114 0 114 114 0 8 0 anonpl 16 17337 0 16197 7 1 6 6 0 125 1 amapchunkpl 152 507 0 470 2 0 2 2 0 158 0 amappl16 192 30 0 28 1 0 1 1 0 8 0 amappl15 184 44 0 40 1 0 1 1 0 8 0 amappl14 176 14 0 13 2 1 1 1 0 8 0 amappl13 168 22 0 19 1 0 1 1 0 8 0 amappl12 160 11 0 11 1 0 1 1 0 8 1 amappl11 152 18 0 7 1 0 1 1 0 8 0 amappl10 144 47 0 46 1 0 1 1 0 8 0 amappl9 136 387 0 386 1 0 1 1 0 8 0 amappl8 128 87 0 81 1 0 1 1 0 8 0 amappl7 120 13 0 12 1 0 1 1 0 8 0 amappl6 112 40 0 36 1 0 1 1 0 8 0 amappl5 104 114 0 105 1 0 1 1 0 8 0 amappl4 96 361 0 340 1 0 1 1 0 8 0 amappl3 88 104 0 98 1 0 1 1 0 8 0 amappl2 80 569 0 525 1 0 1 1 0 8 0 amappl1 72 11729 0 11328 14 4 10 14 0 8 0 amappl 72 376 0 356 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 24 177 0 166 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 177 0 166 1 0 1 1 0 8 0 vmmpekpl 168 5257 0 5238 1 0 1 1 0 8 0 vmmpepl 168 23842 0 23101 44 10 34 43 0 357 1 vmsppl 360 176 0 166 2 0 2 2 0 8 0 pdppl 4096 362 0 332 5 0 5 5 0 8 0 pvpl 32 72262 0 69398 32 5 27 27 0 265 1 pmappl 224 176 0 166 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 241 0 3 7 0 7 7 0 8 0 ddb{0}>