login: panic: kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 879 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 346852 34645 0 0 0x4000000 1 syz-executor.0 * 97187 34645 0 0 0x4000000 0K syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x174 sys/kern/subr_prf.c:208 __assert(ffffffff81f7e6d6,ffffffff81f80d6e,36f,ffffffff81f8ba8b) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b759e0,ffff800020c4db78) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020c4db78) at namei+0x88b sys/kern/vfs_lookup.c:232 domknodat(ffff800020b759e0,ffffff9c,20000100,80,701) at domknodat+0xa1 sys/kern/vfs_syscalls.c:1405 syscall(ffff800020c4de40) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c4de40) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff97,0,3,10e5eba70d8) at Xsyscall+0x128 end of kernel end trace frame: 0x1115bd55e30, 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 kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 879 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x174 sys/kern/subr_prf.c:208 __assert(ffffffff81f7e6d6,ffffffff81f80d6e,36f,ffffffff81f8ba8b) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b759e0,ffff800020c4db78) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020c4db78) at namei+0x88b sys/kern/vfs_lookup.c:232 domknodat(ffff800020b759e0,ffffff9c,20000100,80,701) at domknodat+0xa1 sys/kern/vfs_syscalls.c:1405 syscall(ffff800020c4de40) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c4de40) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff97,0,3,10e5eba70d8) at Xsyscall+0x128 end of kernel end trace frame: 0x1115bd55e30, count: -8 ddb{0}> show registers rdi 0xffffffff814367b7 db_enter+0x17 rsi 0x3e68 __ALIGN_SIZE+0x2e68 rbp 0xffff800020c4d910 rbx 0xffff800020c4d9c0 rdx 0x3e69 __ALIGN_SIZE+0x2e69 rcx 0xffff800000b66000 rax 0xffff800000b66000 r8 0xffffffff818d1a13 kprintf+0x183 r9 0x1 r10 0x25 r11 0x885cb82a8802c15b r12 0x3000000008 r13 0xffff800020c4d920 r14 0x100 r15 0x1 rip 0xffffffff814367b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c4d900 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=97187 stat=onproc flags process=0 proc=4000000 pri=59, usrpri=59, nice=20 forw=0xffffffffffffffff, list=0xffff800020b74018,0xffff800020b744d8 process=0xffff800020b8c9f0 user=0xffff800020c48000, vmspace=0xfffffd807effd000 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 34645 18158 15529 0 2 0 syz-executor.0 34645 346852 15529 0 7 0x4000000 syz-executor.0 *34645 97187 15529 0 7 0x4000000 syz-executor.0 16514 504505 50043 0 2 0 syz-executor.1 16514 411949 50043 0 3 0x4000080 semwait syz-executor.1 16514 377709 50043 0 2 0x4000000 syz-executor.1 50043 398611 12558 0 2 0x482 syz-executor.1 15529 383052 12558 0 3 0x82 nanosleep syz-executor.0 12558 139032 97830 0 3 0x82 thrsleep syz-fuzzer 12558 143077 97830 0 3 0x4000082 thrsleep syz-fuzzer 12558 180145 97830 0 3 0x4000082 thrsleep syz-fuzzer 12558 411545 97830 0 3 0x4000082 thrsleep syz-fuzzer 12558 385928 97830 0 3 0x4000082 kqread syz-fuzzer 12558 290071 97830 0 3 0x4000082 thrsleep syz-fuzzer 12558 186490 97830 0 3 0x4000082 thrsleep syz-fuzzer 12558 299719 97830 0 3 0x4000082 thrsleep syz-fuzzer 12558 150788 97830 0 3 0x4000082 thrsleep syz-fuzzer 12558 346955 97830 0 3 0x4000082 thrsleep syz-fuzzer 97830 338440 39876 0 3 0x10008a pause ksh 39876 28836 70975 0 3 0x92 select sshd 39841 493226 1 0 3 0x100083 ttyin getty 70975 41311 1 0 3 0x80 select sshd 21425 444468 1308 74 3 0x100092 bpf pflogd 1308 469126 1 0 3 0x80 netio pflogd 35360 75591 17384 73 3 0x100090 kqread syslogd 17384 190495 1 0 3 0x100082 netio syslogd 85171 163287 1 77 3 0x100090 poll dhclient 93064 56369 1 0 3 0x80 poll dhclient 72117 441490 0 0 2 0x14200 zerothread 89291 398859 0 0 3 0x14200 aiodoned aiodoned 17703 73087 0 0 3 0x14200 syncer update 17745 49542 0 0 3 0x14200 cleaner cleaner 3760 432320 0 0 3 0x14200 reaper reaper 41272 97499 0 0 3 0x14200 pgdaemon pagedaemon 56301 27907 0 0 3 0x14200 bored crynlk 45611 124725 0 0 3 0x14200 bored crypto 65471 505295 0 0 3 0x40014200 acpi0 acpi0 1996 497816 0 0 3 0x40014200 idle1 19354 387759 0 0 3 0x14200 bored softnet 48050 212596 0 0 3 0x14200 bored systqmp 96442 102711 0 0 3 0x14200 bored systq 37779 302126 0 0 3 0x40014200 bored softclock 52030 87413 0 0 3 0x40014200 idle0 77605 22135 0 0 3 0x14200 bored smr 1 6089 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 34645 (syz-executor.0) thread 0xffff800020b759e0 (97187) exclusive rrwlock inode r = 0 (0xfffffd806889b810) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_vnops.c:1547 #0 witness_lock+0x594 sys/kern/subr_witness.c:1201 #1 _rw_enter+0x45d sys/kern/kern_rwlock.c:280 #2 _rrw_enter+0x60 sys/kern/kern_rwlock.c:410 #3 VOP_LOCK+0x57 sys/kern/vfs_vops.c:602 #4 vn_lock+0x6e sys/kern/vfs_vnops.c:549 #5 vfs_lookup+0xf5 sys/kern/vfs_lookup.c:387 #6 namei+0x4b2 sys/kern/vfs_lookup.c:224 #7 domknodat+0xa1 sys/kern/vfs_syscalls.c:1405 #8 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] #8 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82349ce8) locked @ /syzkaller/managers/multicore/kernel/sys/sys/syscall_mi.h:90 #0 witness_lock+0x594 sys/kern/subr_witness.c:1201 #1 syscall+0x48b mi_syscall sys/sys/syscall_mi.h:91 [inline] #1 syscall+0x48b sys/arch/amd64/amd64/trap.c:574 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9465 6403K 6403K 78643K 10565 0 0 pcb 27 9K 10K 78643K 79 0 0 rtable 100 3K 4K 78643K 192 0 0 ifaddr 39 10K 11K 78643K 49 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1469 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1201 75K 75K 78643K 1217 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 6 0K 0K 78643K 7 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 6 17K 21K 78643K 38 0 0 sigio 0 0K 0K 78643K 2 0 0 proc 56 63K 71K 78643K 324 0 0 subproc 64 65538K 67586K 78643K 68 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 33 2K 2K 78643K 33 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 36 159K 159K 78643K 36 0 0 exec 0 0K 1K 78643K 195 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 87 20K 21K 78643K 944 0 0 UVM aobj 6 2K 2K 78643K 6 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 6 0K 0K 78643K 12 0 0 temp 91 2365K 2433K 78643K 3231 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 4 0 0 1 0 1 1 0 8 0 inpcbpl 280 45 0 38 1 0 1 1 0 8 0 plimitpl 152 16 0 8 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 41 0 1 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 22 0 22 2 1 1 1 0 8 1 tcpcb 544 12 0 8 1 0 1 1 0 8 0 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 2 0 2 1 0 1 1 0 8 1 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 13 0 2 1 0 1 1 0 8 0 pfstkey 112 13 0 2 1 0 1 1 0 8 0 pfstate 328 13 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 256 185 0 0 12 0 12 12 0 8 0 art_table 32 186 0 0 2 0 2 2 0 8 0 art_node 16 40 0 6 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semupl 112 1 0 0 1 0 1 1 0 8 0 semapl 112 4 0 0 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1472 0 57 46 0 46 46 0 8 0 ffsino 272 1472 0 57 95 0 95 95 0 8 0 nchpl 144 1728 0 95 61 0 61 61 0 8 0 uvmvnodes 72 1519 0 0 28 0 28 28 0 8 0 vnodes 200 1519 0 0 80 0 80 80 0 8 0 namei 1024 4359 0 4358 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 4241 0 4241 8 7 1 6 0 8 1 sigapl 432 237 0 221 2 0 2 2 0 8 0 futexpl 56 321 0 321 1 0 1 1 0 8 1 knotepl 112 51 0 32 1 0 1 1 0 8 0 kqueuepl 104 15 0 13 1 0 1 1 0 8 0 pipepl 112 202 0 183 3 1 2 2 0 8 1 fdescpl 488 238 0 221 3 0 3 3 0 8 0 filepl 152 1210 0 1105 5 0 5 5 0 8 0 lockfpl 104 7 0 6 2 1 1 1 0 8 0 lockfspl 32 4 0 3 2 1 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 64 0 55 1 0 1 1 0 8 0 zombiepl 144 221 0 221 2 1 1 1 0 8 1 processpl 840 253 0 221 4 0 4 4 0 8 0 procpl 600 304 0 259 4 0 4 4 0 8 0 sockpl 384 109 0 88 3 0 3 3 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 118 0 0 14 0 14 14 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 134 0 0 8 0 8 8 0 8 0 bufpl 256 5669 0 1143 283 0 283 283 0 8 0 anonpl 16 30229 0 22086 35 2 33 33 0 125 0 amapchunkpl 152 871 0 775 5 0 5 5 0 158 1 amappl16 192 535 0 119 21 0 21 21 0 8 0 amappl15 184 66 0 59 1 0 1 1 0 8 0 amappl14 176 22 0 20 2 1 1 1 0 8 0 amappl13 168 30 0 26 1 0 1 1 0 8 0 amappl12 160 10 0 8 1 0 1 1 0 8 0 amappl11 152 35 0 18 1 0 1 1 0 8 0 amappl10 144 70 0 65 1 0 1 1 0 8 0 amappl9 136 587 0 582 1 0 1 1 0 8 0 amappl8 128 135 0 120 1 0 1 1 0 8 0 amappl7 120 28 0 25 1 0 1 1 0 8 0 amappl6 112 58 0 52 1 0 1 1 0 8 0 amappl5 104 118 0 104 1 0 1 1 0 8 0 amappl4 96 474 0 444 2 0 2 2 0 8 1 amappl3 88 113 0 108 1 0 1 1 0 8 0 amappl2 80 906 0 842 2 0 2 2 0 8 0 amappl1 72 14566 0 14104 25 7 18 20 0 8 8 amappl 72 536 0 496 1 0 1 1 0 75 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 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 238 0 221 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 238 0 221 1 0 1 1 0 8 0 vmmpekpl 168 6074 0 6050 2 0 2 2 0 8 0 vmmpepl 168 32876 0 31371 89 12 77 77 0 357 11 vmsppl 360 237 0 221 2 0 2 2 0 8 0 pdppl 4096 484 0 442 6 0 6 6 0 8 0 pvpl 32 120115 0 108646 107 3 104 104 0 265 11 pmappl 224 237 0 221 2 0 2 2 0 8 1 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 431 0 4 13 0 13 13 0 8 0