panic: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: 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(ffffffff833ff54a) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833b1752,ffffffff8337adec,bc,ffffffff83323f6a) at __assert+0x29 unveil_destroy(ffff800035d24018) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff80002a803210,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff80002a803210,ffff800035d23760,ffff800035d236b0) at sys_exit+0x1a syscall(ffff800035d23760) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75ea8ac99470, 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> 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(ffffffff833ff54a) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833b1752,ffffffff8337adec,bc,ffffffff83323f6a) at __assert+0x29 unveil_destroy(ffff800035d24018) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff80002a803210,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff80002a803210,ffff800035d23760,ffff800035d236b0) at sys_exit+0x1a syscall(ffff800035d23760) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75ea8ac99470, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800035d234b0 rbx 0xffff800035d24018 rdx 0 rcx 0 rax 0xffff80002a803210 r8 0x101010101010101 r9 0x8080808080808080 r10 0x8727c9ae04091bd2 r11 0xb7884c05e530424 r12 0 r13 0x2 r14 0 r15 0x1 rip 0xffffffff81725795 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800035d234a0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=151607 pid=97237 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=57, usrpri=57, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a803210 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a7cb498,0xffff80002a8034b0 process=0xffff800035d24018 user=0xffff800035d1e000, vmspace=0xfffffd806c0ceb50 estcpu=7, cpticks=13, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 24341 75412 0 0 3 0x14200 bored sosplice 53318 114669 7765 0 2 0 syz-executor 53318 354995 7765 0 3 0x4000080 fsleep syz-executor 75885 152378 44511 0 2 0 syz-executor 75885 451031 44511 0 3 0x4000080 lockf syz-executor 72604 453063 52069 0 2 0 syz-executor 72604 442375 52069 0 3 0x4000080 fsleep syz-executor 12979 162357 41265 0 2 0 syz-executor 12979 52638 41265 0 3 0x4000080 ttyout syz-executor 12979 75352 41265 0 3 0x4000080 fsleep syz-executor 14142 261667 54202 0 2 0 syz-executor 14142 503846 54202 0 3 0x4000080 fsleep syz-executor 14142 262633 54202 0 3 0x4000080 fsleep syz-executor 57562 51678 51852 0 3 0x80 nanoslp syz-executor 57562 298769 51852 0 3 0x4000080 fsleep syz-executor 57562 288135 51852 0 3 0x4000080 ttyout syz-executor 57562 427215 51852 0 3 0x4000080 fsleep syz-executor 29092 449943 78133 0 3 0x80 nanoslp syz-executor 29092 403836 78133 0 3 0x4000080 ttyout syz-executor 29092 462835 78133 0 3 0x4000080 fsleep syz-executor 44511 26005 37211 0 3 0x82 nanoslp syz-executor 52069 455669 37211 0 3 0x82 nanoslp syz-executor 41265 241537 37211 0 3 0x82 nanoslp syz-executor 78133 99004 37211 0 3 0x82 nanoslp syz-executor 51852 228136 37211 0 3 0x82 nanoslp syz-executor 7765 56589 37211 0 3 0x82 nanoslp syz-executor 54202 361311 37211 0 3 0x82 nanoslp syz-executor 12800 96917 37211 0 3 0x82 nanoslp syz-executor 37211 196425 50081 0 3 0x82 kqread syz-executor 50081 102038 77593 0 3 0x10008a sigsusp ksh 77593 131093 30393 0 3 0x98 kqread sshd-session 30393 456276 43392 0 3 0x92 kqread sshd-session 58434 425172 1 0 3 0x100083 ttyin getty 43392 504564 1 0 3 0x88 kqread sshd 71545 397796 34712 73 3 0x1100090 kqread syslogd 34712 401690 1 0 3 0x100082 sbwait syslogd 1603 39300 1 0 3 0x100080 kqread resolvd 70269 36526 1962 77 3 0x100092 kqread dhcpleased 28826 115767 1962 77 3 0x100092 kqread dhcpleased 1962 429698 1 0 3 0x80 kqread dhcpleased 62510 41831 0 0 3 0x14200 bored smr 50065 404252 0 0 2 0x14200 zerothread 7282 486296 0 0 3 0x14200 aiodoned aiodoned 52959 340865 0 0 3 0x14200 syncer update 37791 351917 0 0 3 0x14200 cleaner cleaner 80854 351697 0 0 3 0x14200 reaper reaper 24423 281042 0 0 3 0x14200 pgdaemon pagedaemon 41386 496018 0 0 3 0x14200 bored viomb 74662 46741 0 0 3 0x40014200 acpi0 acpi0 51830 439203 0 0 3 0x14200 bored softnet3 24774 474531 0 0 3 0x14200 bored softnet2 40946 430619 0 0 3 0x14200 bored softnet1 13936 15540 0 0 3 0x14200 bored softnet0 14217 279951 0 0 3 0x14200 bored systqmp 28046 290271 0 0 3 0x14200 bored systq 60793 225366 0 0 3 0x40014200 tmoslp softclock 18106 40530 0 0 3 0x40014200 idle0 1 332065 0 0 3 0x82 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 10185 11202K 11202K 166960K 11279 0 pcb 22 12K 12K 166960K 34 0 rtable 234 6K 6K 166960K 358 0 pf 31 13K 13K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 1K 166960K 1 0 counters 30 17K 17K 166960K 30 0 ioctlops 0 0K 4K 166960K 36 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1343 85K 85K 166960K 1373 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 163 0 sigio 0 0K 0K 166960K 1 0 proc 62 75K 124K 166960K 480 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 7 0 in_multi 99 7K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 352 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 228 73K 73K 166960K 2860 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 39 78K 96K 166960K 1195 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1 0 NDP 27 2K 2K 166960K 27 0 temp 37 8622K 8686K 166960K 3838 0 kqueue 13 20K 22K 166960K 26 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 44 0 40 1 0 1 1 0 8 0 rtentry 112 112 0 2 4 0 4 4 0 8 0 unpcb 144 40 0 22 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 15 0 8 1 0 1 1 0 8 0 arp 88 18 0 0 1 0 1 1 0 8 0 inpcb 344 84 0 69 2 0 2 2 0 8 0 nd6 104 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 320 2 0 0 1 0 1 1 0 8 0 pfrule 1344 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 32 453 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1586 0 83 95 0 95 95 0 8 0 ffsino 248 1586 0 83 95 0 95 95 0 8 0 nchpl 144 1807 0 127 63 0 63 63 0 8 0 uvmvnodes 80 1684 0 0 35 0 35 35 0 8 0 vnodes 216 1684 0 0 94 0 94 94 0 8 0 namei 1024 5336 0 5336 1 0 1 1 0 8 1 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 5789 0 5789 3 2 1 3 1 8 1 plimitpl 152 30 0 13 1 0 1 1 0 8 0 sigapl 424 444 0 397 7 1 6 7 0 8 0 futexpl 64 482 0 474 1 0 1 1 0 8 0 knotepl 120 3911 0 3864 2 0 2 2 0 8 0 kqueuepl 184 23 0 14 1 0 1 1 0 8 0 pipepl 296 103 0 76 3 0 3 3 0 8 0 fdescpl 440 427 0 398 5 1 4 5 0 8 0 filepl 120 1456 0 1221 8 0 8 8 0 8 0 lockfpl 104 15 0 10 1 0 1 1 0 8 0 lockfspl 48 9 0 5 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 31 0 15 1 0 1 1 0 8 0 ucredpl 104 96 0 85 1 0 1 1 0 8 0 zombiepl 144 402 0 401 2 1 1 1 0 8 0 processpl 1104 444 0 397 4 0 4 4 0 8 0 procpl 656 497 0 438 6 0 6 6 0 8 0 sockpl 528 168 0 131 3 0 3 3 0 8 0 mcl8k 8192 8 0 8 1 1 0 1 0 8 0 mcl4k 4096 2423 0 2369 13 4 9 13 0 8 0 mcl2k 2048 125 0 125 1 1 0 1 0 8 0 mtagpl 96 7 0 6 1 0 1 1 0 8 0 mbufpl 256 4217 0 4061 10 0 10 10 0 8 0 bufpl 280 2262 0 124 153 0 153 153 0 8 0 anonpl 24 103796 0 98546 33 0 33 33 0 187 0 amapchunkpl 152 8920 0 8274 25 0 25 25 0 158 0 amappl16 200 2062 0 2039 5 3 2 5 0 8 0 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 105 0 95 1 0 1 1 0 8 0 amappl13 176 8 0 7 1 0 1 1 0 8 0 amappl12 168 1040 0 1010 3 1 2 3 0 8 0 amappl11 160 48 0 38 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 244 0 244 1 1 0 1 0 8 0 amappl8 136 39 0 38 1 0 1 1 0 8 0 amappl7 128 106 0 96 1 0 1 1 0 8 0 amappl6 120 172 0 169 1 0 1 1 0 8 0 amappl5 112 111 0 105 1 0 1 1 0 8 0 amappl4 104 285 0 269 1 0 1 1 0 8 0 amappl3 96 1361 0 1246 3 0 3 3 0 8 0 amappl2 88 612 0 559 2 0 2 2 0 8 0 amappl1 80 7505 0 6977 13 1 12 13 0 8 0 amappl 88 2514 0 2334 4 0 4 4 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 72 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 427 0 397 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 427 0 397 1 0 1 1 0 8 0 vmmpekpl 168 4971 0 4941 2 0 2 2 0 8 0 vmmpepl 168 32668 0 30881 79 0 79 79 0 357 0 vmsppl 360 426 0 397 4 1 3 4 0 8 0 rwobjpl 32 14199 0 11655 21 0 21 21 0 8 0 pdppl 4096 861 0 794 97 30 67 83 0 8 0 pvpl 32 220431 0 208442 98 1 97 98 0 265 0 pmappl 216 426 0 397 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 256 0 39 7 0 7 7 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(ffffffff833ff54a) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833b1752,ffffffff8337adec,bc,ffffffff83323f6a) at __assert+0x29 unveil_destroy(ffff800035d24018) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff80002a803210,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff80002a803210,ffff800035d23760,ffff800035d236b0) at sys_exit+0x1a syscall(ffff800035d23760) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75ea8ac99470, 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(ffffffff833ff54a) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833b1752,ffffffff8337adec,bc,ffffffff83323f6a) at __assert+0x29 unveil_destroy(ffff800035d24018) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff80002a803210,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff80002a803210,ffff800035d23760,ffff800035d236b0) at sys_exit+0x1a syscall(ffff800035d23760) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75ea8ac99470, count: -8