panic: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 188 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828a533b) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8292f3e9,ffffffff82931a65,bc,ffffffff828bf4d7) at __assert+0x29 sys/kern/subr_prf.c:157 unveil_destroy(ffff800033f12c88) at unveil_destroy+0x1a4 sys/kern/kern_unveil.c:188 exit1(ffff80002a235aa0,0,0,1) at exit1+0x3d8 sys/kern/kern_exit.c:218 sys_exit(ffff80002a235aa0,ffff800037243130,ffff800037243080) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800037243130) at syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff800037243130) at syscall+0x533 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e7e7e3d4ca0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 188 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828a533b) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8292f3e9,ffffffff82931a65,bc,ffffffff828bf4d7) at __assert+0x29 sys/kern/subr_prf.c:157 unveil_destroy(ffff800033f12c88) at unveil_destroy+0x1a4 sys/kern/kern_unveil.c:188 exit1(ffff80002a235aa0,0,0,1) at exit1+0x3d8 sys/kern/kern_exit.c:218 sys_exit(ffff80002a235aa0,ffff800037243130,ffff800037243080) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800037243130) at syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff800037243130) at syscall+0x533 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e7e7e3d4ca0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800037242e60 rbx 0xffffffff82c99cb7 cpu_info_full_primary+0x2cb7 rdx 0 rcx 0xffff80002a235aa0 rax 0xffffffff82c98ff0 cpu_info_full_primary+0x1ff0 r8 0 r9 0x8080808080808080 r10 0x8a9e5f084e16fa71 r11 0x2a5042365d2a1e67 r12 0xffffffff82c99ab8 cpu_info_full_primary+0x2ab8 r13 0 r14 0 r15 0x1 rip 0xffffffff81aa702c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800037242e50 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.7) tid=63231 pid=75241 tcnt=1 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a235aa0 forw=0xffffffffffffffff, list=0xffff80002a18aaa0,0xffff80002a236d48 process=0xffff800033f12c88 user=0xffff80003723e000, vmspace=0xfffffd8066e748e0 estcpu=36, cpticks=14, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 96007 448334 15497 0 2 0 syz-executor.6 39146 380605 84932 0 2 0 syz-executor.2 95032 498801 73873 0 2 0 syz-executor.1 95032 3177 73873 0 2 0x4000000 syz-executor.1 405 329565 73024 0 2 0 syz-executor.5 405 413878 73024 0 2 0x4000000 syz-executor.5 405 84715 73024 0 2 0x4000000 syz-executor.5 405 455485 73024 0 2 0x4000000 syz-executor.5 15497 127628 53006 0 2 0x482 syz-executor.6 73873 399212 53006 0 3 0x82 nanoslp syz-executor.1 73024 124142 53006 0 3 0x82 nanoslp syz-executor.5 75830 423757 1 0 3 0x100083 ttyin getty 84932 161725 53006 0 3 0x82 nanoslp syz-executor.2 23290 322855 53006 0 2 0x2 syz-executor.3 73066 24203 53006 0 2 0x2 syz-executor.4 51267 451031 53006 0 2 0x482 syz-executor.7 68150 475274 53006 0 2 0x2 syz-executor.0 63631 76326 0 0 3 0x14200 bored sosplice 53006 175695 26547 0 3 0x2000082 thrsleep syz-fuzzer 53006 14434 26547 0 3 0x6000082 thrsleep syz-fuzzer 53006 43292 26547 0 3 0x6000082 wait syz-fuzzer 53006 188014 26547 0 3 0x6000082 kqread syz-fuzzer 53006 255080 26547 0 3 0x6000082 wait syz-fuzzer 53006 487809 26547 0 3 0x6000082 thrsleep syz-fuzzer 53006 348815 26547 0 3 0x6000082 thrsleep syz-fuzzer 53006 288072 26547 0 3 0x6000082 thrsleep syz-fuzzer 53006 375592 26547 0 3 0x6000082 wait syz-fuzzer 53006 79821 26547 0 3 0x6000082 wait syz-fuzzer 53006 134529 26547 0 3 0x6000082 thrsleep syz-fuzzer 53006 311146 26547 0 3 0x6000082 wait syz-fuzzer 53006 515670 26547 0 3 0x6000082 thrsleep syz-fuzzer 53006 80691 26547 0 3 0x6000082 thrsleep syz-fuzzer 53006 134332 26547 0 3 0x6000082 wait syz-fuzzer 53006 488197 26547 0 3 0x6000082 wait syz-fuzzer 53006 297667 26547 0 3 0x6000082 wait syz-fuzzer 26547 5792 75865 0 3 0x10008a sigsusp ksh 75865 285755 66936 0 3 0x9a kqread sshd 66936 496368 1 0 3 0x88 kqread sshd 53590 294722 18123 74 3 0x1100092 bpf pflogd 18123 58502 1 0 3 0x80 netio pflogd 88546 313074 84344 73 3 0x1100090 kqread syslogd 84344 406147 1 0 3 0x100082 netio syslogd 70896 506785 1 0 3 0x100080 kqread resolvd 43155 494221 0 0 3 0x14200 bored smr 48070 333026 0 0 2 0x14200 zerothread 64738 132235 0 0 3 0x14200 aiodoned aiodoned 85558 497085 0 0 3 0x14200 syncer update 84135 155180 0 0 3 0x14200 cleaner cleaner 50868 108445 0 0 3 0x14200 reaper reaper 10405 167803 0 0 3 0x14200 pgdaemon pagedaemon 63535 445245 0 0 3 0x14200 bored viomb 21475 152938 0 0 3 0x40014200 acpi0 acpi0 34597 450632 0 0 7 0x40014200 idle1 43884 63312 0 0 3 0x14200 bored softnet3 94492 251075 0 0 3 0x14200 bored softnet2 9550 429928 0 0 3 0x14200 bored softnet1 65069 332774 0 0 3 0x14200 bored softnet0 22830 495477 0 0 3 0x14200 bored systqmp 63301 425732 0 0 3 0x14200 bored systq 2994 199768 0 0 3 0x14200 tmoslp softclockmp 38812 382824 0 0 2 0x40014200 softclock 99966 368901 0 0 3 0x40014200 idle0 1 285294 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 96007 (syz-executor.6) thread 0xffff80002a23e010 (448334) Process 23290 (syz-executor.3) thread 0xffff80002a23d570 (322855) Process 73066 (syz-executor.4) thread 0xffff80002a23d2c8 (24203) Process 68150 (syz-executor.0) thread 0xffff80002a23dd68 (475274) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10229 6510K 8607K 166960K 23020 0 pcb 15 22K 24K 166960K 3701 0 rtable 225 15K 16K 166960K 7487 0 pf 37 10K 11K 166960K 782 0 ifaddr 112 35K 37K 166960K 904 0 ifgroup 64 2K 3K 166960K 1330 0 sysctl 4 1K 5K 166960K 17 0 counters 68 36K 37K 166960K 798 0 ioctlops 0 0K 4K 166960K 3883 0 iov 0 0K 28K 166960K 4592 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1719 107K 108K 166960K 14389 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 490 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 4932 0 dirhash 12 2K 3K 166960K 315 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 89K 166960K 44117 0 sigio 0 0K 0K 166960K 1727 0 proc 96 93K 128K 166960K 6604 0 subproc 104 6K 8K 166960K 1933 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 3900 0 in_multi 88 6K 7K 166960K 2093 0 ether_multi 1 0K 0K 166960K 76 0 mrt 1 0K 0K 166960K 37 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 277 1235K 1235K 166960K 277 0 exec 0 0K 1K 166960K 8175 0 pfkey data 0 0K 0K 166960K 142 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 714 1785K 1791K 166960K 408012 0 UVM aobj 131 4K 4K 166960K 135 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 2122 0 NDP 14 0K 1K 166960K 669 0 temp 74 6772K 137848K 166960K 516484 0 kqueue 6 10K 33K 166960K 3228 0 SYN cache 2 36K 44K 166960K 3 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 2852 0 2851 31 30 1 4 0 8 0 rtentry 112 2111 0 2011 6 2 4 4 0 8 0 unpcb 144 39637 0 39629 413 412 1 13 0 8 0 syncache 336 400 0 400 82 82 0 1 0 8 0 sackhl 24 3 33 3 1 1 0 1 0 8 0 tcpqe 32 648 0 648 59 59 0 1 0 8 0 tcpcb 808 14078 0 14060 417 413 4 16 0 8 0 arp 120 475 0 459 1 0 1 1 0 8 0 inpcb 392 36946 0 36928 670 666 4 17 0 8 0 nd6 136 456 0 434 1 0 1 1 0 8 0 pkpcb 40 253 0 253 29 29 0 1 0 8 0 kcovpl 48 144 0 136 1 0 1 1 0 8 0 ppxss 1168 105 0 105 32 32 0 1 0 8 0 pffrag 232 264 0 260 11 10 1 1 0 482 0 pffrnode 88 261 0 257 11 10 1 1 0 8 0 pffrent 40 729 0 725 12 11 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 1356 0 1328 1 0 1 1 0 8 0 pfstkey 128 1436 0 1408 5 3 2 2 0 8 0 pfstate 376 1436 0 1408 26 22 4 6 0 8 1 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 5 0 4 3 2 1 3 0 8 0 art_heap4 256 7325 0 6904 80 52 28 33 0 8 0 art_table 32 7330 0 6908 7 3 4 5 0 8 0 art_node 16 2067 0 1976 1 0 1 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 112 4927 0 4917 1 0 1 1 0 8 0 shmpl 112 132 0 4 4 0 4 4 0 8 0 dirhash 1024 219 0 202 3 0 3 3 0 8 0 dino2pl 256 59363 0 57621 110 0 110 110 0 8 0 ffsino 272 59363 0 57621 117 0 117 117 0 8 0 nchpl 144 119026 0 117359 64 0 64 64 0 8 0 uvmvnodes 80 8622 0 0 176 0 176 176 0 8 0 vnodes 216 8622 0 0 479 0 479 479 0 8 0 namei 1024 401494 0 401493 26 25 1 2 0 8 0 percpumem 16 413 0 365 1 0 1 1 0 8 0 vcpupl 2048 514 0 2 64 0 64 64 0 8 0 vmpool 696 674 0 162 49 2 47 47 0 8 0 kstatmem 264 758 0 730 5 2 3 3 0 8 0 scxspl 216 365486 0 365486 30 29 1 8 1 8 1 plimitpl 152 5254 0 5239 1 0 1 1 0 8 0 sigapl 424 44267 0 44220 12 5 7 9 0 8 0 futexpl 64 387016 0 387016 6 5 1 1 0 8 1 knotepl 120 1572 0 0 22 8 14 17 0 8 0 kqueuepl 216 8105 0 8100 128 127 1 8 0 8 0 pipepl 320 6912 0 6884 185 182 3 8 0 8 0 fdescpl 496 44143 0 44116 7 3 4 5 0 8 0 filepl 152 265417 0 265196 473 461 12 22 0 8 0 lockfpl 104 11997 0 11996 16 15 1 2 0 8 0 lockfspl 48 3922 0 3921 1 0 1 1 0 8 0 sessionpl 144 169 0 153 1 0 1 1 0 8 0 pgrppl 48 1223 0 1207 1 0 1 1 0 8 0 ucredpl 104 37954 0 37932 1 0 1 1 0 8 0 zombiepl 144 44393 0 44392 9 8 1 1 0 8 0 processpl 1136 44267 0 44220 6 1 5 6 0 8 0 procpl 680 110191 0 110124 16 7 9 10 0 8 0 srpgc 96 184 0 184 60 60 0 1 0 8 0 sosppl 168 529 0 529 55 55 0 1 0 8 0 sockpl 584 79952 0 79925 827 823 4 26 0 8 0 mcl64k 65536 26 0 0 4 1 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 20 0 0 2 0 2 2 0 8 0 mcl8k 8192 50 0 0 7 3 4 6 0 8 0 mcl4k 4096 23 0 0 3 0 3 3 0 8 0 mcl2k2 2112 9 0 0 1 0 1 1 0 8 0 mcl2k 2048 405 0 0 35 16 19 35 0 8 0 mtagpl 96 121 0 0 3 0 3 3 0 8 0 mbufpl 256 8858 0 0 427 0 427 427 0 8 0 bufpl 280 70358 0 61736 617 0 617 617 0 8 0 anonpl 24 4044230 0 4030596 336 207 129 168 0 186 0 amapchunkpl 152 1318539 0 1317687 290 249 41 67 0 158 0 amappl16 200 74875 0 74086 380 334 46 55 0 8 0 amappl15 192 20 0 18 1 0 1 1 0 8 0 amappl14 184 612 0 592 6 4 2 2 0 8 0 amappl13 176 87 0 85 1 0 1 1 0 8 0 amappl12 168 47088 0 47045 11 8 3 3 0 8 0 amappl11 160 61 0 52 1 0 1 1 0 8 0 amappl10 152 254 0 235 1 0 1 1 0 8 0 amappl9 144 452 0 452 82 82 0 1 0 8 0 amappl8 136 2221 0 1958 13 2 11 11 0 8 0 amappl7 128 643 0 618 2 0 2 2 0 8 0 amappl6 120 2732 0 2696 7 5 2 2 0 8 0 amappl5 112 1049 0 1041 1 0 1 1 0 8 0 amappl4 104 2107 0 2047 2 0 2 2 0 8 0 amappl3 96 253310 0 253236 4 1 3 3 0 8 0 amappl2 88 46627 0 46539 4 1 3 3 0 8 0 amappl1 80 174600 0 174134 24 12 12 23 0 8 0 amappl 88 405228 0 404889 12 3 9 9 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 72 134 0 4 3 0 3 3 0 8 0 uaddrrnd 24 44817 0 44277 4 0 4 4 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 44817 0 44277 4 0 4 4 0 8 0 vmmpekpl 168 275831 0 275702 7 0 7 7 0 8 0 vmmpepl 168 2611192 0 2607985 1431 1235 196 242 0 357 21 vmsppl 448 44816 0 44277 68 7 61 61 0 8 0 rwobjpl 56 581113 0 570227 195 39 156 158 0 8 0 pdppl 4096 89641 0 89066 2466 1891 575 579 0 8 0 pvpl 32 44647 0 0 362 1 361 361 0 265 0 pmappl 248 44816 0 44277 35 1 34 34 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 4793 0 3356 42 0 42 42 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828a533b) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8292f3e9,ffffffff82931a65,bc,ffffffff828bf4d7) at __assert+0x29 sys/kern/subr_prf.c:157 unveil_destroy(ffff800033f12c88) at unveil_destroy+0x1a4 sys/kern/kern_unveil.c:188 exit1(ffff80002a235aa0,0,0,1) at exit1+0x3d8 sys/kern/kern_exit.c:218 sys_exit(ffff80002a235aa0,ffff800037243130,ffff800037243080) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800037243130) at syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff800037243130) at syscall+0x533 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e7e7e3d4ca0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029cebff0) at sched_idle+0x41e sys/kern/kern_sched.c:183 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029cebff0) at sched_idle+0x41e sys/kern/kern_sched.c:183 end trace frame: 0x0, count: -5