kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Mon May 17 16:32:13 PDT 2021 OpenBSD/amd64 (ci-openbsd-multicore-1.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.1.0' (ED25519) 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program login: witness: lock order reversal: 1st 0xfffffd8078de3258 fdlock (&newfdp->fd_fd.fd_lock) 2nd 0xfffffd806d6f13d8 inode (&ip->i_lock) lock order data w2 -> w1 missing lock order data w1 -> w2 missing Stopped at db_enter+0x18: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x18 witness_checkorder(fffffd806d6f13d8,9,0) at witness_checkorder+0x108b rw_enter(fffffd806d6f13c8,81) at rw_enter+0xd4 rrw_enter(fffffd806d6f13c8,81) at rrw_enter+0x88 VOP_LOCK(fffffd8078819ea0,81) at VOP_LOCK+0x87 vn_lock(fffffd8078819ea0,81) at vn_lock+0x84 uvn_get(fffffd806ce810f0,0,ffff80002126ec08,ffff80002126ebd8,0,2) at uvn_get+0x276 uvm_fault_lower(ffff80002126ed70,ffff80002126eda8,ffff80002126ecf0,0) at uvm_fault_lower+0x302 uvm_fault(fffffd807f00aa10,20000000,0,2) at uvm_fault+0x256 kpageflttrap(ffff80002126ef00,20000040) at kpageflttrap+0x1fd kerntrap(ffff80002126ef00) at kerntrap+0xef alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 syscall(ffff80002126f130) at syscall+0x5bf Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2229aa33480, count: -15 ddb{1}> show registers rdi 0x3 rsi 0xffffffff82701ff0 __sancov_gen_cov_switch_values.134 rbp 0xffff80002126e880 rbx 0x3 rdx 0x8b rcx 0x3 rax 0x1 r8 0xffffffff8157e211 witness_checkorder+0x1061 r9 0x5 r10 0xa5633de55a00ae8 r11 0xe65e1acd83735101 r12 0 r13 0xfffffd806d6f13d8 r14 0 r15 0xfffffd8002cfa740 rip 0xffffffff8215de78 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002126e870 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor1318) pid=437562 stat=onproc flags process=0 proc=4000000 pri=17, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000211b2548,0xffff8000211ffcf0 process=0xffff800021225528 user=0xffff80002126a000, vmspace=0xfffffd807f00aa10 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18658 367970 33679 0 2 0 syz-executor1318 18658 147011 33679 0 2 0x4000000 syz-executor1318 18658 279271 33679 0 2 0x4000000 syz-executor1318 81172 122678 68255 0 7 0 syz-executor1318 81172 120155 68255 0 2 0x4000000 syz-executor1318 *81172 437562 68255 0 7 0x4000000 syz-executor1318 68255 204459 26179 0 3 0x80 nanoslp syz-executor1318 33679 41886 26179 0 3 0x80 nanoslp syz-executor1318 26179 435943 34781 0 3 0x82 nanoslp syz-executor1318 34781 106065 75170 0 3 0x10008a sigsusp ksh 75170 13804 62453 0 3 0x92 select sshd 84191 8621 1 0 3 0x100083 ttyin getty 62453 515962 1 0 3 0x80 select sshd 5006 457843 94027 74 3 0x100092 bpf pflogd 94027 361569 1 0 3 0x80 netio pflogd 78923 452222 47376 73 3 0x100090 kqread syslogd 47376 314832 1 0 3 0x100082 netio syslogd 42503 373725 1 77 3 0x100090 poll dhclient 96507 362896 1 0 3 0x80 poll dhclient 61410 167439 0 0 3 0x14200 bored smr 56402 233381 0 0 2 0x14200 zerothread 75076 500739 0 0 3 0x14200 aiodoned aiodoned 94364 509141 0 0 3 0x14200 syncer update 4182 18791 0 0 3 0x14200 cleaner cleaner 25683 369622 0 0 3 0x14200 reaper reaper 69374 20730 0 0 3 0x14200 pgdaemon pagedaemon 24845 41843 0 0 3 0x14200 bored crynlk 13311 474656 0 0 3 0x14200 bored crypto 16610 314362 0 0 3 0x14200 bored viomb 38177 462861 0 0 3 0x40014200 acpi0 acpi0 25468 378697 0 0 3 0x40014200 idle1 21756 25469 0 0 3 0x14200 bored softnet 24875 110186 0 0 3 0x14200 bored systqmp 55786 27774 0 0 3 0x14200 bored systq 9218 518078 0 0 3 0x40014200 bored softclock 72794 155600 0 0 3 0x40014200 idle0 1 275794 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 81172 (syz-executor1318) thread 0xffff8000ffff7cf0 (437562) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828b2e60) #0 witness_lock+0x4b0 #1 uvm_fault+0x23a #2 kpageflttrap+0x1fd #3 kerntrap+0xef #4 alltraps_kern_meltdown+0x7b #5 copyout+0x53 #6 syscall+0x5bf #7 Xsyscall+0x128 exclusive rwlock fdlock r = 0 (0xfffffd8078de3258) #0 witness_lock+0x4b0 #1 sys_socketpair+0x20f #2 syscall+0x5bf #3 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10112 6476K 6477K 78643K 11202 0 pcb 13 8K 8K 78643K 13 0 rtable 61 2K 2K 78643K 119 0 ifaddr 29 8K 8K 78643K 30 0 counters 40 33K 33K 78643K 40 0 ioctlops 0 0K 4K 78643K 1467 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 1 0 vnodes 1183 74K 75K 78643K 1221 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 1 0K 0K 78643K 1 0 proc 59 63K 71K 78643K 357 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 2K 78643K 300 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 99 4K 5K 78643K 1834 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 4 0K 0K 78643K 4 0 temp 23 3969K 4033K 78643K 1745 0 kqueue 2 2K 2K 78643K 2 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 120 15 0 13 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 120 163 0 151 1 0 1 1 0 8 0 syncache 296 5 0 5 2 1 1 1 0 8 1 tcpcb 736 8 0 5 1 0 1 1 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 304 28 0 23 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 9 0 2 1 0 1 1 0 8 0 pfstkey 112 9 0 2 1 0 1 1 0 8 0 pfstate 320 9 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 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 dino2pl 256 1504 0 115 87 0 87 87 0 8 0 ffsino 272 1504 0 115 93 0 93 93 0 8 0 nchpl 144 1715 0 167 58 0 58 58 0 8 0 uvmvnodes 72 1514 0 0 28 0 28 28 0 8 0 vnodes 224 1514 0 0 90 0 90 90 0 8 0 namei 1024 4052 0 4052 2 1 1 1 0 8 1 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 216 3974 0 3974 11 10 1 8 0 8 1 plimitpl 152 14 0 8 1 0 1 1 0 8 0 sigapl 424 257 0 224 4 0 4 4 0 8 0 futexpl 56 75 0 75 1 0 1 1 0 8 1 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 168 1 0 0 1 0 1 1 0 8 0 pipepl 336 64 0 60 2 1 1 1 0 8 0 fdescpl 496 241 0 224 3 0 3 3 0 8 0 filepl 152 1091 0 1041 2 0 2 2 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 62 0 53 1 0 1 1 0 8 0 zombiepl 144 224 0 224 2 1 1 1 0 8 1 processpl 1080 257 0 224 3 0 3 3 0 8 0 procpl 672 296 0 259 4 0 4 4 0 8 0 sockpl 480 206 0 187 4 1 3 3 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 82 0 0 11 0 11 11 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 127 0 0 7 0 7 7 0 8 0 bufpl 280 2056 0 90 141 0 141 141 0 8 0 anonpl 24 35780 0 33232 18 2 16 16 0 186 0 amapchunkpl 152 3504 0 3322 9 1 8 8 0 158 1 amappl16 200 66 0 62 1 0 1 1 0 8 0 amappl15 192 51 0 46 1 0 1 1 0 8 0 amappl13 176 14 0 13 2 1 1 1 0 8 0 amappl12 168 27 0 24 1 0 1 1 0 8 0 amappl11 160 44 0 32 1 0 1 1 0 8 0 amappl10 152 6 0 2 1 0 1 1 0 8 0 amappl9 144 241 0 241 3 2 1 1 0 8 1 amappl8 136 240 0 235 1 0 1 1 0 8 0 amappl7 128 36 0 32 1 0 1 1 0 8 0 amappl6 120 82 0 73 1 0 1 1 0 8 0 amappl5 112 137 0 127 1 0 1 1 0 8 0 amappl4 104 504 0 482 1 0 1 1 0 8 0 amappl3 96 68 0 62 1 0 1 1 0 8 0 amappl2 88 345 0 306 1 0 1 1 0 8 0 amappl1 80 7038 0 6644 12 3 9 9 0 8 0 amappl 88 1628 0 1548 2 0 2 2 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 241 0 224 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 241 0 224 1 0 1 1 0 8 0 vmmpekpl 168 5592 0 5575 1 0 1 1 0 8 0 vmmpepl 168 21769 0 20802 46 3 43 43 0 357 0 vmsppl 368 240 0 224 2 0 2 2 0 8 0 rwobjpl 56 6618 0 6085 10 2 8 8 0 8 0 pdppl 4096 489 0 448 59 18 41 41 0 8 0 pvpl 32 107277 0 102784 44 7 37 37 0 265 0 pmappl 232 240 0 224 1 0 1 1 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 281 0 23 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8270cff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xb7 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828b2c58) at __mp_lock+0x122 softintr_dispatch(0) at softintr_dispatch+0x4e Xsoftclock() at Xsoftclock+0x1f end of kernel end trace frame: 0x7f7ffffe8bd0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x18 witness_checkorder(fffffd806d6f13d8,9,0) at witness_checkorder+0x108b rw_enter(fffffd806d6f13c8,81) at rw_enter+0xd4 rrw_enter(fffffd806d6f13c8,81) at rrw_enter+0x88 VOP_LOCK(fffffd8078819ea0,81) at VOP_LOCK+0x87 vn_lock(fffffd8078819ea0,81) at vn_lock+0x84 uvn_get(fffffd806ce810f0,0,ffff80002126ec08,ffff80002126ebd8,0,2) at uvn_get+0x276 uvm_fault_lower(ffff80002126ed70,ffff80002126eda8,ffff80002126ecf0,0) at uvm_fault_lower+0x302 uvm_fault(fffffd807f00aa10,20000000,0,2) at uvm_fault+0x256 kpageflttrap(ffff80002126ef00,20000040) at kpageflttrap+0x1fd kerntrap(ffff80002126ef00) at kerntrap+0xef alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 syscall(ffff80002126f130) at syscall+0x5bf Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2229aa33480, count: -15 ddb{1}>