kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Tue Mar 26 21:04:40 PDT 2019 OpenBSD/amd64 (ci-openbsd-setuid-7.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.9' (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 371041 49759 0 0x2 0 1 syz-executor0238 *293533 49759 0 0x2 0x4000000 0K syz-executor0238 db_enter() at db_enter+0x18 panic() at panic+0x174 __assert(ffffffff81f7c61c,ffffffff81f2d7dd,36f,ffffffff81f8730a) at __assert+0x2e unveil_check_final(ffff800020b76e20,ffff800020bad5d0) at unveil_check_final+0x81d namei(ffff800020bad5d0) at namei+0x88b vn_open(ffff800020bad5d0,301,8) at vn_open+0x157 doopenat(ffff800020b76e20,ffffff9c,20000040,300,8,ffff800020bad810) at doopenat+0x2ca syscall(ffff800020bad8c0) at syscall+0x5b8 Xsyscall(6,0,e62185fc0b8,0,e62185fc098,e62185fc090) at Xsyscall+0x128 end of kernel end trace frame: 0xe64520022b0, 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(ffffffff81f7c61c,ffffffff81f2d7dd,36f,ffffffff81f8730a) at __assert+0x2e unveil_check_final(ffff800020b76e20,ffff800020bad5d0) at unveil_check_final+0x81d namei(ffff800020bad5d0) at namei+0x88b vn_open(ffff800020bad5d0,301,8) at vn_open+0x157 doopenat(ffff800020b76e20,ffffff9c,20000040,300,8,ffff800020bad810) at doopenat+0x2ca syscall(ffff800020bad8c0) at syscall+0x5b8 Xsyscall(6,0,e62185fc0b8,0,e62185fc098,e62185fc090) at Xsyscall+0x128 end of kernel end trace frame: 0xe64520022b0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020bad210 rbx 0xffff800020bad2c0 rdx 0xffffffff81f1e360 cmd0646_9_tim_udma+0x129e0 rcx 0x201 rax 0x1 r8 0xffffffff813481d3 kprintf+0x183 r9 0x1 r10 0x9384988be87b58b8 r11 0x9a1406abeb0817fb r12 0x3000000008 r13 0xffff800020bad220 r14 0x100 r15 0x1 rip 0xffffffff81266358 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020bad200 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor0238) pid=293533 stat=onproc flags process=2 proc=4000000 pri=53, usrpri=53, nice=20 forw=0xffffffffffffffff, list=0xffff800020b76268,0xffffffff8235ec20 process=0xffff800020b8c018 user=0xffff800020ba8000, vmspace=0xfffffd806e925878 estcpu=3, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49759 371041 20172 0 7 0x2 syz-executor0238 *49759 293533 20172 0 7 0x4000002 syz-executor0238 20172 305691 16563 0 3 0x10008a pause ksh 16563 16616 30439 0 3 0x92 select sshd 98805 293041 1 0 3 0x100083 ttyin getty 30439 334772 1 0 3 0x80 select sshd 63940 40723 88043 73 3 0x100090 kqread syslogd 88043 80378 1 0 3 0x100082 netio syslogd 86107 219449 1 77 3 0x100090 poll dhclient 66941 18773 1 0 3 0x80 poll dhclient 3753 390690 0 0 3 0x14200 pgzero zerothread 91846 464741 0 0 3 0x14200 aiodoned aiodoned 568 129049 0 0 3 0x14200 syncer update 38238 324806 0 0 3 0x14200 cleaner cleaner 78522 414163 0 0 3 0x14200 reaper reaper 25622 15426 0 0 3 0x14200 pgdaemon pagedaemon 39551 361601 0 0 3 0x14200 bored crynlk 70461 344421 0 0 3 0x14200 bored crypto 43225 437047 0 0 3 0x40014200 acpi0 acpi0 94810 247283 0 0 3 0x40014200 idle1 26003 189499 0 0 3 0x14200 bored softnet 62181 425613 0 0 3 0x14200 bored systqmp 78639 426484 0 0 3 0x14200 bored systq 83314 274981 0 0 2 0x40014200 softclock 56662 26786 0 0 3 0x40014200 idle0 12282 377489 0 0 3 0x14200 bored smr 1 393400 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 49759 (syz-executor0238) thread 0xffff800020b76e20 (293533) exclusive rrwlock inode r = 0 (0xfffffd806ee1b2c8) 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 vfs_lookup+0xf5 #6 namei+0x4b2 #7 vn_open+0x157 #8 doopenat+0x2ca #9 syscall+0x5b8 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82397440) 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 49 2K 3K 78643K 661 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 2379 0 2379 8 2 6 6 0 8 6 sigapl 432 176 0 166 2 0 2 2 0 8 0 futexpl 56 1 0 1 1 0 1 1 0 8 1 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 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 70 0 0 9 0 9 9 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 89 0 0 6 0 6 6 0 8 0 bufpl 256 2063 0 254 114 0 114 114 0 8 0 anonpl 16 17096 0 15961 6 1 5 6 0 125 0 amapchunkpl 152 493 0 456 2 0 2 2 0 158 0 amappl16 192 32 0 30 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 8 0 8 1 0 1 1 0 8 1 amappl11 152 18 0 7 1 0 1 1 0 8 0 amappl10 144 48 0 48 2 1 1 1 0 8 1 amappl9 136 368 0 367 1 0 1 1 0 8 0 amappl8 128 87 0 82 1 0 1 1 0 8 0 amappl7 120 11 0 10 1 0 1 1 0 8 0 amappl6 112 42 0 38 1 0 1 1 0 8 0 amappl5 104 164 0 154 1 0 1 1 0 8 0 amappl4 96 369 0 346 1 0 1 1 0 8 0 amappl3 88 106 0 100 1 0 1 1 0 8 0 amappl2 80 570 0 527 1 0 1 1 0 8 0 amappl1 72 11828 0 11432 14 4 10 14 0 8 0 amappl 72 370 0 350 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 23693 0 22958 50 16 34 43 0 357 2 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 72225 0 69359 32 5 27 27 0 265 3 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}>