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 25943 4149 0 0 0 0 syz-executor0650 *324807 79845 0 0 0x4000000 1K syz-executor0650 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(ffffffff81f7eb2c,ffffffff81f800b9,36f,ffffffff81f8afb5) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b152c8,ffff800020bd75d8) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bd75d8) at namei+0x88b sys/kern/vfs_lookup.c:232 domknodat(ffff800020b152c8,ffffff9c,20000000,80002002,a22) at domknodat+0xa1 sys/kern/vfs_syscalls.c:1405 syscall(ffff800020bd78a0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bd78a0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,428adecb0c8,0,428adecb0a8,428adecb0a0) at Xsyscall+0x128 end of kernel end trace frame: 0x42ba95bc640, 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 "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 879 ddb{1}> 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(ffffffff81f7eb2c,ffffffff81f800b9,36f,ffffffff81f8afb5) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b152c8,ffff800020bd75d8) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bd75d8) at namei+0x88b sys/kern/vfs_lookup.c:232 domknodat(ffff800020b152c8,ffffff9c,20000000,80002002,a22) at domknodat+0xa1 sys/kern/vfs_syscalls.c:1405 syscall(ffff800020bd78a0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bd78a0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,428adecb0c8,0,428adecb0a8,428adecb0a0) at Xsyscall+0x128 end of kernel end trace frame: 0x42ba95bc640, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020bd7370 rbx 0xffff800020bd7420 rdx 0xffffffff81f89e77 apollo_pio_rec+0x9e22 rcx 0x201 rax 0x1 r8 0xffffffff811c43a3 kprintf+0x183 r9 0x1 r10 0xf3848e40e9679e8f r11 0xda2f1d558d5d0bd5 r12 0x3000000008 r13 0xffff800020bd7380 r14 0x100 r15 0x1 rip 0xffffffff81e2e758 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020bd7360 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor0650) pid=324807 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b15520,0xffff800020b14018 process=0xffff800020b8d080 user=0xffff800020bd2000, vmspace=0xfffffd807effe5a0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 4149 25943 85778 0 7 0 syz-executor0650 4149 263349 85778 0 2 0x4000000 syz-executor0650 4149 6572 85778 0 2 0x4000000 syz-executor0650 79845 141307 50214 0 3 0x80 nanosleep syz-executor0650 *79845 324807 50214 0 7 0x4000000 syz-executor0650 79845 482868 50214 0 3 0x4000080 fsleep syz-executor0650 50214 295924 3789 0 3 0x80 nanosleep syz-executor0650 85778 419920 3789 0 3 0x80 nanosleep syz-executor0650 3789 188537 29749 0 3 0x82 nanosleep syz-executor0650 29749 43000 17399 0 3 0x10008a pause ksh 17399 77986 82377 0 3 0x92 select sshd 6510 280092 1 0 3 0x100083 ttyin getty 82377 337231 1 0 3 0x80 select sshd 34532 390030 35905 74 3 0x100092 bpf pflogd 35905 38787 1 0 3 0x80 netio pflogd 95147 348970 45848 73 3 0x100090 kqread syslogd 45848 177996 1 0 3 0x100082 netio syslogd 31633 300380 1 77 3 0x100090 poll dhclient 76077 233000 1 0 3 0x80 poll dhclient 94472 62035 0 0 2 0x14200 zerothread 90754 345818 0 0 3 0x14200 aiodoned aiodoned 58226 55420 0 0 3 0x14200 syncer update 70784 76096 0 0 3 0x14200 cleaner cleaner 37858 517239 0 0 3 0x14200 reaper reaper 39001 493090 0 0 3 0x14200 pgdaemon pagedaemon 98129 57410 0 0 3 0x14200 bored crynlk 16613 70490 0 0 3 0x14200 bored crypto 67361 273705 0 0 3 0x40014200 acpi0 acpi0 3440 409070 0 0 3 0x40014200 idle1 79240 468950 0 0 3 0x14200 bored softnet 27249 488546 0 0 3 0x14200 bored systqmp 57279 219171 0 0 3 0x14200 bored systq 25686 280913 0 0 3 0x40014200 bored softclock 60010 108922 0 0 3 0x40014200 idle0 75023 198022 0 0 3 0x14200 bored smr 1 152482 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 79845 (syz-executor0650) thread 0xffff800020b152c8 (324807) exclusive rrwlock inode r = 0 (0xfffffd806d9f1d60) 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 (0xffffffff8234a3d0) 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{1}> 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 1167 73K 73K 78643K 1552 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 1179 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 62 3K 3K 78643K 1222 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 2447 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 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 0 1 0 1 1 0 8 0 pfstkey 112 8 0 0 1 0 1 1 0 8 0 pfstate 328 8 0 0 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 2222 0 845 45 0 45 45 0 8 0 ffsino 272 2222 0 845 92 0 92 92 0 8 0 nchpl 144 2583 0 1046 58 0 58 58 0 8 0 uvmvnodes 72 2232 0 0 41 0 41 41 0 8 0 vnodes 200 2232 0 0 118 0 118 118 0 8 0 namei 1024 5363 0 5362 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 4477 0 4477 8 2 6 6 0 8 6 sigapl 432 433 0 417 2 0 2 2 0 8 0 futexpl 56 297 0 296 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 488 434 0 417 3 0 3 3 0 8 0 filepl 152 1184 0 1137 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 144 417 0 417 2 1 1 1 0 8 1 processpl 840 449 0 417 4 0 4 4 0 8 0 procpl 600 677 0 641 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 70 0 0 9 0 9 9 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 86 0 0 5 0 5 5 0 8 0 bufpl 256 2393 0 275 133 0 133 133 0 8 0 anonpl 16 28709 0 27375 8 2 6 7 0 125 0 amapchunkpl 152 1232 0 1187 2 0 2 2 0 158 0 amappl16 192 512 0 503 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 10 0 10 1 1 0 1 0 8 0 amappl11 152 23 0 8 1 0 1 1 0 8 0 amappl10 144 55 0 53 1 0 1 1 0 8 0 amappl9 136 427 0 425 1 0 1 1 0 8 0 amappl8 128 105 0 98 1 0 1 1 0 8 0 amappl7 120 18 0 16 1 0 1 1 0 8 0 amappl6 112 43 0 39 1 0 1 1 0 8 0 amappl5 104 116 0 103 1 0 1 1 0 8 0 amappl4 96 654 0 628 1 0 1 1 0 8 0 amappl3 88 328 0 319 1 0 1 1 0 8 0 amappl2 80 2675 0 2617 2 0 2 2 0 8 0 amappl1 72 16558 0 16095 15 5 10 15 0 8 0 amappl 72 880 0 853 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 24 434 0 417 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 434 0 417 1 0 1 1 0 8 0 vmmpekpl 168 6508 0 6488 2 0 2 2 0 8 1 vmmpepl 168 41411 0 40460 55 13 42 46 0 357 0 vmsppl 360 433 0 417 2 0 2 2 0 8 0 pdppl 4096 876 0 834 6 0 6 6 0 8 0 pvpl 32 104679 0 101332 33 4 29 29 0 265 2 pmappl 224 433 0 417 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 263 0 4 8 0 8 8 0 8 0 ddb{1}>