login: panic: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_unveil.c", line 196 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 221529 33080 0 0x2 0x4000000 0 syz-fuzzer db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:212 __assert(ffffffff81fa433f,ffffffff81f5a5dd,c4,ffffffff81f65138) at __assert+0x2e sys/kern/subr_prf.c:159 unveil_destroy(ffff800020b3a390) at unveil_destroy+0x19f sys/kern/kern_unveil.c:196 exit1(ffff800020b38018,0,1) at exit1+0x38f sys/kern/kern_exit.c:218 sys_exit(ffff800020b38018,ffff800022e118c0,ffff800022e11930) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800022e119a0) at syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022e119a0) at syscall+0x552 sys/arch/amd64/amd64/trap.c:554 Xsyscall(6,1,0,1,0,7f7ffffdcd94) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdcd60, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_unveil.c", line 196 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:212 __assert(ffffffff81fa433f,ffffffff81f5a5dd,c4,ffffffff81f65138) at __assert+0x2e sys/kern/subr_prf.c:159 unveil_destroy(ffff800020b3a390) at unveil_destroy+0x19f sys/kern/kern_unveil.c:196 exit1(ffff800020b38018,0,1) at exit1+0x38f sys/kern/kern_exit.c:218 sys_exit(ffff800020b38018,ffff800022e118c0,ffff800022e11930) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800022e119a0) at syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022e119a0) at syscall+0x552 sys/arch/amd64/amd64/trap.c:554 Xsyscall(6,1,0,1,0,7f7ffffdcd94) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdcd60, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800022e116d0 rbx 0xffff800022e11780 rdx 0xffff800020b38018 rcx 0 rax 0 r8 0xffffffff81e35323 kprintf+0x173 r9 0x1 r10 0x25 r11 0x52d1a2a1831628fe r12 0x3000000008 r13 0xffff800022e116e0 r14 0x100 r15 0x1 rip 0xffffffff817e0ae8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022e116c0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=75544 stat=onproc flags process=1018 proc=2000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b393d8,0xffffffff82367800 process=0xffff800020b3a390 user=0xffff800022e0c000, vmspace=0xfffffd807effdb80 estcpu=36, cpticks=8, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 57998 296683 44247 32767 3 0x90 nanosleep syz-executor.0 44247 205404 33080 0 3 0x82 wait syz-executor.0 1511 53312 0 0 3 0x14200 bored sosplice 33080 413124 77169 0 3 0x82 thrsleep syz-fuzzer 33080 242752 77169 0 3 0x4000082 nanosleep syz-fuzzer 33080 123199 77169 0 3 0x4000082 thrsleep syz-fuzzer 33080 265727 77169 0 3 0x4000082 thrsleep syz-fuzzer 33080 235652 77169 0 3 0x4000082 thrsleep syz-fuzzer 33080 221529 77169 0 7 0x4000002 syz-fuzzer 33080 395758 77169 0 3 0x4000082 thrsleep syz-fuzzer 33080 429223 77169 0 3 0x4000082 kqread syz-fuzzer 33080 269611 77169 0 3 0x4000082 thrsleep syz-fuzzer 33080 78781 77169 0 3 0x4000082 thrsleep syz-fuzzer 77169 388627 60733 0 3 0x10008a pause ksh 60733 159814 47481 0 3 0x92 select sshd 65325 261257 1 0 3 0x100083 ttyin getty 47481 48399 1 0 3 0x80 select sshd 93785 314801 26781 73 3 0x100090 kqread syslogd 26781 197457 1 0 3 0x100082 netio syslogd 89795 114218 1 77 3 0x100090 poll dhclient 54724 426188 1 0 3 0x80 poll dhclient 95768 79219 0 0 3 0x14200 pgzero zerothread 60695 484544 0 0 3 0x14200 aiodoned aiodoned 69520 449708 0 0 3 0x14200 syncer update 81359 464018 0 0 3 0x14200 cleaner cleaner 69065 242963 0 0 3 0x14200 reaper reaper 3794 171334 0 0 3 0x14200 pgdaemon pagedaemon 51711 487619 0 0 3 0x14200 bored crynlk 66977 141430 0 0 3 0x14200 bored crypto 28543 311002 0 0 3 0x40014200 acpi0 acpi0 95329 107896 0 0 3 0x40014200 idle1 53065 322907 0 0 3 0x14200 bored softnet 85121 433184 0 0 3 0x14200 bored systqmp 76706 294789 0 0 3 0x14200 bored systq 62574 307107 0 0 3 0x40014200 bored softclock 89341 312910 0 0 3 0x40014200 idle0 36407 284839 0 0 3 0x14200 bored smr 1 220450 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9457 6319K 6321K 78643K 10559 0 0 pcb 23 9K 10K 78643K 159 0 0 rtable 83 2K 3K 78643K 285 0 0 ifaddr 28 8K 9K 78643K 46 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 2K 78643K 20 0 0 iov 0 0K 12K 78643K 19 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1214 76K 76K 78643K 1296 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 6 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 37 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 4 9K 33K 78643K 275 0 0 sigio 0 0K 0K 78643K 7 0 0 proc 44 50K 66K 78643K 459 0 0 subproc 17 1K 2K 78643K 68 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 36 0 0 in_multi 22 1K 2K 78643K 59 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 60 265K 265K 78643K 60 0 0 exec 0 0K 1K 78643K 250 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 81 12K 30K 78643K 1692 0 0 UVM aobj 19 2K 2K 78643K 21 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 14 0 0 NDP 4 0K 0K 78643K 15 0 0 temp 73 2727K 2793K 78643K 3801 0 0 kqueue 0 0K 0K 78643K 4 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 10 0 6 1 0 1 1 0 8 0 inpcbpl 280 171 0 164 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 67 0 34 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 81 0 77 1 0 1 1 0 8 0 nd6 48 12 0 9 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 277 0 132 12 0 12 12 0 8 0 art_table 32 278 0 132 2 0 2 2 0 8 0 art_node 16 66 0 36 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 0 1 0 1 1 0 8 0 semapl 112 35 0 25 1 0 1 1 0 8 0 shmpl 112 19 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1735 0 313 47 0 47 47 0 8 0 ffsino 272 1735 0 313 96 0 96 96 0 8 0 nchpl 144 2282 0 663 61 0 61 61 0 8 0 uvmvnodes 72 1812 0 0 33 0 33 33 0 8 0 vnodes 200 1812 0 0 96 0 96 96 0 8 0 namei 1024 6494 0 6494 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 5685 0 5685 7 6 1 6 0 8 1 plimitpl 152 41 0 34 1 0 1 1 0 8 0 sigapl 432 440 0 427 3 1 2 3 0 8 0 futexpl 56 2660 0 2660 1 0 1 1 0 8 1 knotepl 112 159 0 146 1 0 1 1 0 8 0 kqueuepl 104 89 0 87 1 0 1 1 0 8 0 pipepl 112 240 0 227 2 1 1 1 0 8 0 fdescpl 488 441 0 428 3 0 3 3 0 8 1 filepl 152 2466 0 2394 6 1 5 5 0 8 1 lockfpl 104 63 0 63 2 1 1 1 0 8 1 lockfspl 48 22 0 22 2 1 1 1 0 8 1 sessionpl 112 19 0 10 1 0 1 1 0 8 0 pgrppl 48 21 0 12 1 0 1 1 0 8 0 ucredpl 96 532 0 524 1 0 1 1 0 8 0 zombiepl 144 428 0 427 2 1 1 1 0 8 0 processpl 896 457 0 427 4 0 4 4 0 8 0 procpl 632 940 0 901 5 1 4 5 0 8 0 srpgc 64 6 0 6 3 2 1 1 0 8 1 sosppl 128 2 0 2 1 1 0 1 0 8 0 sockpl 384 319 0 302 3 0 3 3 0 8 1 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 137 0 0 17 0 17 17 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 201 0 0 12 0 12 12 0 8 0 bufpl 256 5919 0 1154 298 0 298 298 0 8 0 anonpl 16 60418 0 53807 44 1 43 43 0 125 15 amapchunkpl 152 2692 0 2603 13 4 9 9 0 158 5 amappl16 192 1833 0 1494 35 9 26 30 0 8 8 amappl15 184 61 0 60 1 0 1 1 0 8 0 amappl14 176 119 0 114 1 0 1 1 0 8 0 amappl13 168 7 0 7 1 1 0 1 0 8 0 amappl12 160 120 0 119 1 0 1 1 0 8 0 amappl11 152 108 0 92 1 0 1 1 0 8 0 amappl10 144 68 0 64 2 1 1 1 0 8 0 amappl9 136 592 0 590 1 0 1 1 0 8 0 amappl8 128 149 0 132 1 0 1 1 0 8 0 amappl7 120 44 0 36 1 0 1 1 0 8 0 amappl6 112 99 0 91 1 0 1 1 0 8 0 amappl5 104 242 0 233 1 0 1 1 0 8 0 amappl4 96 497 0 471 1 0 1 1 0 8 0 amappl3 88 411 0 398 1 0 1 1 0 8 0 amappl2 80 2560 0 2495 4 2 2 3 0 8 0 amappl1 72 19469 0 19054 23 13 10 19 0 8 0 amappl 80 1191 0 1157 1 0 1 1 0 84 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 20 0 2 1 0 1 1 0 8 0 uaddrrnd 24 441 0 427 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 441 0 427 1 0 1 1 0 8 0 vmmpekpl 168 7394 0 7371 2 0 2 2 0 8 0 vmmpepl 168 60625 0 59241 92 9 83 83 0 357 21 vmsppl 368 440 0 427 2 0 2 2 0 8 0 pdppl 4096 890 0 854 6 0 6 6 0 8 1 pvpl 32 181666 0 172025 132 15 117 117 0 265 35 pmappl 232 440 0 427 2 1 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 454 0 3 13 0 13 13 0 8 0