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 351681 80359 0 0x2 0 1 syz-executor7118 *132681 80359 0 0x2 0x4000000 0K syz-executor7118 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(ffff800020b84268,ffff800020bc7bb8) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bc7bb8) at namei+0x88b sys/kern/vfs_lookup.c:232 domknodat(ffff800020b84268,ffffff9c,20000440,2000,0) at domknodat+0xa1 sys/kern/vfs_syscalls.c:1405 syscall(ffff800020bc7e80) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bc7e80) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,b46590d60f0,0,b46590d60d0,b46590d60c8) at Xsyscall+0x128 end of kernel end trace frame: 0xb49215c4270, 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(ffff800020b84268,ffff800020bc7bb8) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bc7bb8) at namei+0x88b sys/kern/vfs_lookup.c:232 domknodat(ffff800020b84268,ffffff9c,20000440,2000,0) at domknodat+0xa1 sys/kern/vfs_syscalls.c:1405 syscall(ffff800020bc7e80) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bc7e80) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,b46590d60f0,0,b46590d60d0,b46590d60c8) at Xsyscall+0x128 end of kernel end trace frame: 0xb49215c4270, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020bc7950 rbx 0xffff800020bc7a00 rdx 0xffffffff81f8c339 apollo_pio_rec+0x95b5 rcx 0x201 rax 0x1 r8 0xffffffff818d1a13 kprintf+0x183 r9 0x1 r10 0x3474b3b9aeacb9aa r11 0xe42dc6b533b964c r12 0x3000000008 r13 0xffff800020bc7960 r14 0x100 r15 0x1 rip 0xffffffff814367b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020bc7940 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor7118) pid=132681 stat=onproc flags process=2 proc=4000000 pri=51, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020b85780,0xffffffff82393cf8 process=0xffff800020b3a6a0 user=0xffff800020bc2000, vmspace=0xfffffd806e80f5a8 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 80359 351681 29865 0 7 0x2 syz-executor7118 80359 347539 29865 0 3 0x4000082 fsleep syz-executor7118 *80359 132681 29865 0 7 0x4000002 syz-executor7118 29865 13279 85822 0 3 0x10008a pause ksh 85822 155622 2678 0 3 0x92 select sshd 85138 374834 1 0 3 0x100083 ttyin getty 2678 21598 1 0 3 0x80 select sshd 66232 1327 41424 74 3 0x100092 bpf pflogd 41424 212143 1 0 3 0x80 netio pflogd 71788 382890 75781 73 3 0x100090 kqread syslogd 75781 451304 1 0 3 0x100082 netio syslogd 44065 193665 1 77 3 0x100090 poll dhclient 30878 328970 1 0 3 0x80 poll dhclient 11935 483760 0 0 2 0x14200 zerothread 18645 227895 0 0 3 0x14200 aiodoned aiodoned 92483 365696 0 0 3 0x14200 syncer update 83 159466 0 0 3 0x14200 cleaner cleaner 92152 158697 0 0 3 0x14200 reaper reaper 5680 300024 0 0 3 0x14200 pgdaemon pagedaemon 91054 250418 0 0 3 0x14200 bored crynlk 24711 346548 0 0 3 0x14200 bored crypto 96612 315468 0 0 3 0x40014200 acpi0 acpi0 81382 449055 0 0 3 0x40014200 idle1 52534 360035 0 0 3 0x14200 bored softnet 22087 236906 0 0 3 0x14200 bored systqmp 54354 37346 0 0 3 0x14200 bored systq 81968 228105 0 0 3 0x40014200 bored softclock 78955 140254 0 0 3 0x40014200 idle0 11715 262604 0 0 3 0x14200 bored smr 1 3690 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 80359 (syz-executor7118) thread 0xffff800020b84268 (132681) exclusive rrwlock inode r = 0 (0xfffffd806eb0ff78) 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 9450 6382K 6383K 78643K 10537 0 0 pcb 25 9K 9K 78643K 57 0 0 rtable 61 2K 2K 78643K 125 0 0 ifaddr 25 7K 7K 78643K 26 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1467 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1168 73K 73K 78643K 1173 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 2 0K 0K 78643K 2 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 1 0K 0K 78643K 1 0 0 proc 55 62K 70K 78643K 283 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 11 0K 0K 78643K 11 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 18 79K 79K 78643K 18 0 0 exec 0 0K 1K 78643K 179 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 58 3K 3K 78643K 768 0 0 UVM aobj 2 2K 2K 78643K 2 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 4 0K 0K 78643K 4 0 0 temp 39 2360K 2424K 78643K 1998 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 2 0 0 1 0 1 1 0 8 0 inpcbpl 280 29 0 23 1 0 1 1 0 8 0 plimitpl 152 14 0 8 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 syncache 264 5 0 5 1 0 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 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 8 0 2 1 0 1 1 0 8 0 pfstkey 112 8 0 2 1 0 1 1 0 8 0 pfstate 328 8 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 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1392 0 18 45 0 45 45 0 8 0 ffsino 272 1392 0 18 92 0 92 92 0 8 0 nchpl 144 1565 0 32 57 0 57 57 0 8 0 uvmvnodes 72 1402 0 0 26 0 26 26 0 8 0 vnodes 200 1402 0 0 74 0 74 74 0 8 0 namei 1024 3564 0 3563 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 2440 0 2440 8 2 6 6 0 8 6 sigapl 432 205 0 193 2 0 2 2 0 8 0 futexpl 56 2 0 1 1 0 1 1 0 8 0 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 104 1 0 0 1 0 1 1 0 8 0 pipepl 112 134 0 127 2 1 1 1 0 8 0 fdescpl 488 206 0 193 3 0 3 3 0 8 0 filepl 152 962 0 915 2 0 2 2 0 8 0 lockfpl 104 6 0 6 1 1 0 1 0 8 0 lockfspl 32 3 0 3 1 1 0 1 0 8 0 sessionpl 112 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 52 0 43 1 0 1 1 0 8 0 zombiepl 144 193 0 193 2 1 1 1 0 8 1 processpl 840 221 0 193 4 0 4 4 0 8 0 procpl 600 223 0 193 3 0 3 3 0 8 0 sockpl 384 73 0 55 2 0 2 2 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 64 0 0 8 0 8 8 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 88 0 0 6 1 5 5 0 8 0 bufpl 256 2165 0 275 119 0 119 119 0 8 0 anonpl 16 19105 0 17857 8 2 6 7 0 125 0 amapchunkpl 152 556 0 515 2 0 2 2 0 158 0 amappl16 192 30 0 28 1 0 1 1 0 8 0 amappl15 184 53 0 49 1 0 1 1 0 8 0 amappl14 176 16 0 15 2 1 1 1 0 8 0 amappl13 168 22 0 19 1 0 1 1 0 8 0 amappl12 160 7 0 7 1 0 1 1 0 8 1 amappl11 152 23 0 8 1 0 1 1 0 8 0 amappl10 144 56 0 54 1 0 1 1 0 8 0 amappl9 136 412 0 411 1 0 1 1 0 8 0 amappl8 128 99 0 93 1 0 1 1 0 8 0 amappl7 120 19 0 18 1 0 1 1 0 8 0 amappl6 112 44 0 40 1 0 1 1 0 8 0 amappl5 104 143 0 129 1 0 1 1 0 8 0 amappl4 96 431 0 407 1 0 1 1 0 8 0 amappl3 88 103 0 97 1 0 1 1 0 8 0 amappl2 80 601 0 553 1 0 1 1 0 8 0 amappl1 72 13754 0 13321 16 6 10 16 0 8 0 amappl 72 428 0 405 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 206 0 193 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 206 0 193 1 0 1 1 0 8 0 vmmpekpl 168 5595 0 5574 2 0 2 2 0 8 0 vmmpepl 168 27407 0 26590 52 15 37 50 0 357 1 vmsppl 360 205 0 193 2 0 2 2 0 8 0 pdppl 4096 420 0 386 6 0 6 6 0 8 0 pvpl 32 81770 0 78649 33 4 29 29 0 265 1 pmappl 224 205 0 193 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 249 0 5 7 0 7 7 0 8 0 ddb{0}>