#! ±)µm›;9¥¯ <æ+b €ÛÿBøx­S\*AV0Œ/9äæ˜1ÛñV$·{jpanic: kernel diagnostic assertion "ps->ps_uvncount == 0" faile d: file "/syzkaller/managers/main/kernel/sys/kern/kern_unveil.c ", line 188 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830b56e5) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83067daa,ffffffff8303b695,bc,ffffffff82fee698) at __assert+0x29 unveil_destroy(ffff80002d9e9138) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff80002a4d0a40,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff80002a4d0a40,ffff800037617060,ffff800037616fb0) at sys_exit+0x1a syscall(ffff800037617060) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b664265e750, count: 7 https://www.openbsd.org/ddb.html describes the minimum info req uired in bug reports. Insufficient info makes it difficult to find and fix b ugs. ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_unveil.c", line 188 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830b56e5) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83067daa,ffffffff8303b695,bc,ffffffff82fee698) at __assert+0x29 unveil_destroy(ffff80002d9e9138) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff80002a4d0a40,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff80002a4d0a40,ffff800037617060,ffff800037616fb0) at sys_exit+0x1a syscall(ffff800037617060) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b664265e750, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800037616db0 rbx 0xffff80002d9e9138 rdx 0 rcx 0 rax 0xffff80002a4d0a40 r8 0 r9 0x8080808080808080 r10 0x2677410aaeaa2b5 r11 0x876be37d244cce66 r12 0 r13 0x2 r14 0 r15 0x1 rip 0xffffffff82b40c75 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800037616da0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=449311 pid=72812 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=83, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a4d0a40 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a4d11d8,0xffff80002a4d1470 process=0xffff80002d9e9138 user=0xffff800037612000, vmspace=0xfffffd807bd336c0 estcpu=33, cpticks=9, pctcpu=0.1, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 16222 193779 9241 0 2 0 syz-executor 16222 494484 9241 0 3 0x4000080 fsleep syz-executor 32365 57757 47983 0 2 0 syz-executor 32365 137041 47983 0 3 0x4000080 fsleep syz-executor 43362 334569 15124 0 2 0 syz-executor 45817 499097 42064 0 2 0 syz-executor 45817 86831 42064 0 2 0x4000000 syz-executor 95340 512060 63128 0 2 0 syz-executor 95340 85726 63128 0 3 0x4000080 fsleep syz-executor 94900 101331 31389 60928 2 0x10 syz-executor 94900 474410 31389 60928 3 0x4000090 fsleep syz-executor 92891 324131 91065 0 2 0 syz-executor 92891 223437 91065 0 3 0x4000080 fsleep syz-executor 92891 213718 91065 0 3 0x4000080 fsleep syz-executor 92891 45401 91065 0 3 0x4000080 fsleep syz-executor 47983 295987 33650 0 2 0x482 syz-executor 42064 480584 33650 0 2 0x482 syz-executor 91065 114374 33650 0 2 0x482 syz-executor 15124 279142 33650 0 2 0x482 syz-executor 63128 271509 33650 0 2 0x2 syz-executor 20871 222020 33650 0 2 0x482 syz-executor 31389 449265 33650 0 2 0x482 syz-executor 9241 61006 33650 0 2 0x482 syz-executor 14171 143174 0 0 3 0x14200 acct acct 52974 155541 1 0 3 0x100083 ttyin getty 55036 454992 0 0 3 0x14200 bored sosplice 33650 369146 32758 0 3 0x82 kqread syz-executor 32758 300962 78930 0 3 0x10008a sigsusp ksh 78930 456337 21231 0 3 0x98 kqread sshd-session 21231 121019 1 0 3 0x92 kqread sshd-session 63392 186568 49997 73 2 0x1100010 syslogd 49997 134548 1 0 3 0x100082 sbwait syslogd 168 263617 1 0 3 0x100080 kqread resolvd 20107 439229 59515 77 3 0x100092 kqread dhcpleased 35911 319193 59515 77 3 0x100092 kqread dhcpleased 59515 476830 1 0 3 0x80 kqread dhcpleased 9424 395253 0 0 3 0x14200 bored smr 96888 211080 0 0 2 0x14200 zerothread 28327 69092 0 0 3 0x14200 aiodoned aiodoned 84781 22725 0 0 2 0x14600 update 23076 337723 0 0 3 0x14200 cleaner cleaner 37318 149063 0 0 3 0x14200 reaper reaper 17014 51193 0 0 3 0x14200 pgdaemon pagedaemon 31480 347582 0 0 3 0x14200 bored viomb 28625 322898 0 0 3 0x40014200 acpi0 acpi0 15782 59823 0 0 3 0x14200 bored softnet3 85079 503224 0 0 3 0x14200 bored softnet2 85452 379474 0 0 3 0x14200 bored softnet1 64453 316940 0 0 3 0x14200 bored softnet0 6090 522589 0 0 3 0x14200 bored systqmp 21362 518740 0 0 3 0x14200 bored systq 41135 380721 0 0 2 0x40014200 softclock 35222 51206 0 0 3 0x40014200 idle0 1 165305 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 11122K 11444K 166960K 13053 0 pcb 18 17K 19K 166960K 412 0 rtable 227 7K 8K 166960K 2138 0 pf 36 14K 22K 166960K 211 0 ifaddr 43 8K 8K 166960K 287 0 ifgroup 54 2K 2K 166960K 311 0 sysctl 3 0K 2K 166960K 5 0 counters 31 17K 17K 166960K 98 0 ioctlops 0 0K 4K 166960K 240 0 iov 0 0K 16K 166960K 234 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1471 92K 93K 166960K 3014 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 20 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 57 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 85K 166960K 2131 0 sigio 0 0K 0K 166960K 30 0 proc 64 75K 83K 166960K 2104 0 subproc 104 6K 7K 166960K 806 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 450 0 in_multi 99 7K 7K 166960K 760 0 ether_multi 1 0K 0K 166960K 6 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 1334 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 214 72K 96K 166960K 18184 0 UVM aobj 130 4K 4K 166960K 133 0 pinsyscall 37 74K 90K 166960K 4577 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 51 0 NDP 12 0K 2K 166960K 207 0 temp 76 6816K 6886K 166960K 83441 0 kqueue 12 18K 32K 166960K 247 0 SYN cache 2 2352K 2360K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 253 0 250 1 0 1 1 0 8 0 rtentry 112 752 0 649 4 0 4 4 0 8 1 unpcb 144 1699 0 1684 9 5 4 6 0 8 3 syncache 336 8 0 8 3 2 1 1 0 8 1 tcpqe 32 3 0 3 2 1 1 1 0 8 1 tcpcb 808 599 0 596 21 17 4 14 0 8 3 arp 88 134 0 116 1 0 1 1 0 8 0 ipq 40 7 0 6 1 0 1 1 0 8 0 ipqe 40 12 0 10 1 0 1 1 0 8 0 inpcb 336 2211 0 2202 24 15 9 12 0 8 7 nd6 104 197 0 172 1 0 1 1 0 8 0 pkpcb 40 14 0 14 2 1 1 1 0 8 1 kcovpl 48 62 0 54 1 0 1 1 0 8 0 ppxss 1072 8 0 8 3 2 1 1 0 8 1 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 8 0 5 1 0 1 1 0 8 0 pfstate 344 4 0 2 1 0 1 1 0 8 0 pfrule 1344 2 0 1 1 0 1 1 0 8 0 art_heap8 4096 3 0 1 3 1 2 3 0 8 0 art_heap4 256 2982 0 2535 37 8 29 29 0 8 1 art_table 32 2985 0 2536 4 0 4 4 0 8 0 art_node 16 745 0 653 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 7 1 0 1 1 0 8 0 semapl 112 54 0 44 1 0 1 1 0 8 0 shmpl 112 130 0 3 4 0 4 4 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3925 0 2317 101 0 101 101 0 8 0 ffsino 240 3925 0 2317 95 0 95 95 0 8 0 nchpl 144 5930 0 4174 66 0 66 66 0 8 0 uvmvnodes 80 5223 0 0 107 0 107 107 0 8 0 vnodes 216 5223 0 0 291 0 291 291 0 8 0 namei 1024 25894 0 25894 4 1 3 3 0 8 3 kstatmem 264 158 0 134 2 0 2 2 0 8 0 scsiplug 72 4 0 4 3 2 1 1 0 8 1 scxspl 216 40830 0 40830 10 9 1 8 1 8 1 plimitpl 152 445 0 429 1 0 1 1 0 8 0 sigapl 424 2310 0 2263 6 0 6 6 0 8 0 futexpl 64 19388 0 19381 1 0 1 1 0 8 0 knotepl 120 45073 0 45028 51 41 10 23 0 8 8 kqueuepl 184 404 0 396 1 0 1 1 0 8 0 pipepl 288 481 0 454 9 2 7 7 0 8 4 fdescpl 432 2291 0 2263 4 0 4 4 0 8 0 filepl 120 13386 0 13147 20 8 12 14 0 8 4 lockfpl 104 396 0 394 1 0 1 1 0 8 0 lockfspl 48 160 0 158 1 0 1 1 0 8 0 sessionpl 144 79 0 72 1 0 1 1 0 8 0 pgrppl 48 192 0 177 1 0 1 1 0 8 0 ucredpl 104 2144 0 2131 1 0 1 1 0 8 0 zombiepl 144 2603 0 2602 2 1 1 1 0 8 0 processpl 1096 2310 0 2263 4 0 4 4 0 8 0 procpl 648 4238 0 4183 6 0 6 6 0 8 1 sosppl 168 7 0 7 3 2 1 1 0 8 1 sockpl 504 4204 0 4177 63 51 12 21 0 8 7 mcl64k 65536 49 0 49 2 1 1 1 0 8 1 mcl16k 16384 20 0 20 3 2 1 1 0 8 1 mcl12k 12288 9 0 9 3 2 1 1 0 8 1 mcl9k 9216 6 0 6 3 2 1 1 0 8 1 mcl8k 8192 34 0 34 3 2 1 1 0 8 1 mcl4k 4096 4684 0 4632 20 12 8 15 0 8 1 mcl2k2 2112 2 0 2 2 1 1 1 0 8 1 mcl2k 2048 2715 0 2713 5 3 2 3 0 8 1 mtagpl 96 37 0 36 1 0 1 1 0 8 0 mbufpl 256 22342 0 22174 24 7 17 20 0 8 6 bufpl 280 10458 0 3756 479 0 479 479 0 8 0 anonpl 24 375290 0 372318 106 57 49 73 0 187 13 amapchunkpl 152 59803 0 59331 62 31 31 39 0 158 12 amappl16 200 7712 0 7693 43 35 8 15 0 8 6 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 222 0 213 1 0 1 1 0 8 0 amappl13 176 11 0 11 1 1 0 1 0 8 0 amappl12 168 3781 0 3753 2 0 2 2 0 8 0 amappl11 160 63 0 53 1 0 1 1 0 8 0 amappl10 152 12 0 11 1 0 1 1 0 8 0 amappl9 144 128 0 128 1 1 0 1 0 8 0 amappl8 136 31 0 29 1 0 1 1 0 8 0 amappl7 128 213 0 204 1 0 1 1 0 8 0 amappl6 120 712 0 711 1 0 1 1 0 8 0 amappl5 112 349 0 340 1 0 1 1 0 8 0 amappl4 104 460 0 447 1 0 1 1 0 8 0 amappl3 96 11595 0 11488 4 0 4 4 0 8 1 amappl2 88 1509 0 1454 2 0 2 2 0 8 0 amappl1 80 17099 0 16661 13 0 13 13 0 8 1 amappl 88 17326 0 17161 5 0 5 5 0 92 0 dma4096 4096 2 0 2 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 2 1 1 1 0 8 1 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 7 0 7 2 1 1 1 0 8 1 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 132 0 3 3 0 3 3 0 8 0 uaddrrnd 24 2291 0 2262 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2291 0 2262 1 0 1 1 0 8 0 vmmpekpl 168 18123 0 18066 3 0 3 3 0 8 0 vmmpepl 168 145878 0 144254 105 24 81 90 0 357 10 vmsppl 344 2290 0 2262 4 1 3 4 0 8 0 rwobjpl 24 47594 0 41501 37 0 37 37 0 8 0 pdppl 4096 4588 0 4524 192 128 64 76 0 8 0 pvpl 32 1082874 0 1073927 392 173 219 250 0 265 121 pmappl 216 2290 0 2262 2 0 2 2 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 617 0 255 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830b56e5) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83067daa,ffffffff8303b695,bc,ffffffff82fee698) at __assert+0x29 unveil_destroy(ffff80002d9e9138) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff80002a4d0a40,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff80002a4d0a40,ffff800037617060,ffff800037616fb0) at sys_exit+0x1a syscall(ffff800037617060) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b664265e750, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830b56e5) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83067daa,ffffffff8303b695,bc,ffffffff82fee698) at __assert+0x29 unveil_destroy(ffff80002d9e9138) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff80002a4d0a40,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff80002a4d0a40,ffff800037617060,ffff800037616fb0) at sys_exit+0x1a syscall(ffff800037617060) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b664265e750, count: -8