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 264074 61226 0 0 0 0 syz-executor6448 * 89049 76853 0 0 0x4000000 1K syz-executor6448 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(ffffffff81f7cec5,ffffffff81f805b4,36f,ffffffff81f8b307) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b044b8,ffff800020bc7b38) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bc7b38) at namei+0x88b sys/kern/vfs_lookup.c:232 domkdirat(ffff800020b044b8,ffffff9c,20000040,0) at domkdirat+0x81 sys/kern/vfs_syscalls.c:2866 syscall(ffff800020bc7df0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bc7df0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,1df6d39b0c8,0,1df6d39b0a8,1df6d39b0a0) at Xsyscall+0x128 end of kernel end trace frame: 0x1e17c25df20, 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(ffffffff81f7cec5,ffffffff81f805b4,36f,ffffffff81f8b307) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b044b8,ffff800020bc7b38) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bc7b38) at namei+0x88b sys/kern/vfs_lookup.c:232 domkdirat(ffff800020b044b8,ffffff9c,20000040,0) at domkdirat+0x81 sys/kern/vfs_syscalls.c:2866 syscall(ffff800020bc7df0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bc7df0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,1df6d39b0c8,0,1df6d39b0a8,1df6d39b0a0) at Xsyscall+0x128 end of kernel end trace frame: 0x1e17c25df20, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020bc78e0 rbx 0xffff800020bc7990 rdx 0xffffffff81f8b3e6 apollo_pio_rec+0x9d5d rcx 0x201 rax 0x1 r8 0xffffffff81b94ad3 kprintf+0x183 r9 0x1 r10 0xf7154240dfad5b9f r11 0x87043a6d9ca046b5 r12 0x3000000008 r13 0xffff800020bc78f0 r14 0x100 r15 0x1 rip 0xffffffff81d528d8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020bc78d0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor6448) pid=89049 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b05c28,0xffff800020b04e28 process=0xffff800020b7cd38 user=0xffff800020bc2000, vmspace=0xfffffd807effeca8 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 61226 264074 27059 0 7 0 syz-executor6448 61226 195377 27059 0 3 0x4000000 biowait syz-executor6448 61226 246688 27059 0 2 0x4000000 syz-executor6448 76853 213926 95487 0 3 0x80 nanosleep syz-executor6448 *76853 89049 95487 0 7 0x4000000 syz-executor6448 76853 366323 95487 0 3 0x4000080 fsleep syz-executor6448 27059 333869 21567 0 3 0x80 nanosleep syz-executor6448 95487 389067 21567 0 3 0x80 nanosleep syz-executor6448 21567 90280 23580 0 3 0x82 nanosleep syz-executor6448 23580 5914 19273 0 3 0x10008a pause ksh 19273 296 63850 0 3 0x92 select sshd 83030 158496 1 0 3 0x100083 ttyin getty 63850 97625 1 0 3 0x80 select sshd 29481 108737 76413 74 3 0x100092 bpf pflogd 76413 79638 1 0 3 0x80 netio pflogd 75950 363631 79227 73 3 0x100090 kqread syslogd 79227 496909 1 0 3 0x100082 netio syslogd 34735 317365 1 77 3 0x100090 poll dhclient 13460 454764 1 0 3 0x80 poll dhclient 41740 453792 0 0 3 0x14200 pgzero zerothread 80095 458746 0 0 3 0x14200 aiodoned aiodoned 75995 493183 0 0 3 0x14200 syncer update 9375 142587 0 0 3 0x14200 cleaner cleaner 42724 115927 0 0 3 0x14200 reaper reaper 67509 503315 0 0 3 0x14200 pgdaemon pagedaemon 51773 270265 0 0 3 0x14200 bored crynlk 37253 233301 0 0 3 0x14200 bored crypto 38737 28207 0 0 3 0x40014200 acpi0 acpi0 9381 396108 0 0 3 0x40014200 idle1 16580 475178 0 0 3 0x14200 bored softnet 78671 452431 0 0 3 0x14200 bored systqmp 32269 206490 0 0 3 0x14200 bored systq 93206 115000 0 0 3 0x40014200 bored softclock 39872 28468 0 0 3 0x40014200 idle0 8413 263798 0 0 3 0x14200 bored smr 1 34312 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 61226 (syz-executor6448) thread 0xffff800020b04e18 (195377) exclusive rrwlock inode r = 0 (0xfffffd807bcb6d60) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_ihash.c:140 #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 ufs_ihashins+0x6d sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x143 sys/ufs/ffs/ffs_vfsops.c:1352 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0x10f sys/ufs/ufs/ufs_vnops.c:1164 #7 VOP_MKDIR+0x76 sys/kern/vfs_vops.c:449 #8 domkdirat+0x12d sys/kern/vfs_syscalls.c:2881 #9 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] #9 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807bcb6c50) 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 domkdirat+0x81 sys/kern/vfs_syscalls.c:2866 #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 Process 76853 (syz-executor6448) thread 0xffff800020b044b8 (89049) exclusive rrwlock inode r = 0 (0xfffffd807bcb6e70) 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 domkdirat+0x81 sys/kern/vfs_syscalls.c:2866 #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 (0xffffffff823e9b78) 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 1172 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 82K 78643K 525 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 64 3K 3K 78643K 1021 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 2484 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 tcpqe 32 24 0 24 1 1 0 1 0 8 0 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 1637 0 259 45 0 45 45 0 8 0 ffsino 272 1637 0 259 92 0 92 92 0 8 0 nchpl 144 2056 0 518 58 0 58 58 0 8 0 uvmvnodes 72 1647 0 0 30 0 30 30 0 8 0 vnodes 200 1647 0 0 87 0 87 87 0 8 0 namei 1024 4661 0 4659 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 3910 0 3909 7 1 6 6 0 8 5 sigapl 432 330 0 314 2 0 2 2 0 8 0 futexpl 56 146 0 145 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 488 331 0 314 3 0 3 3 0 8 0 filepl 152 1202 0 1155 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 144 314 0 314 2 1 1 1 0 8 1 processpl 840 346 0 314 4 0 4 4 0 8 0 procpl 600 474 0 438 3 0 3 3 0 8 0 sockpl 384 73 0 55 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 74 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 94 0 0 6 0 6 6 0 8 0 bufpl 256 2416 0 275 134 0 134 134 0 8 0 anonpl 16 24187 0 22846 8 2 6 7 0 125 0 amapchunkpl 152 931 0 884 2 0 2 2 0 158 0 amappl16 192 303 0 291 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 12 0 12 1 1 0 1 0 8 0 amappl11 152 25 0 10 1 0 1 1 0 8 0 amappl10 144 56 0 54 1 0 1 1 0 8 0 amappl9 136 424 0 423 1 0 1 1 0 8 0 amappl8 128 105 0 97 1 0 1 1 0 8 0 amappl7 120 18 0 17 1 0 1 1 0 8 0 amappl6 112 44 0 39 1 0 1 1 0 8 0 amappl5 104 121 0 108 1 0 1 1 0 8 0 amappl4 96 553 0 524 1 0 1 1 0 8 0 amappl3 88 226 0 217 1 0 1 1 0 8 0 amappl2 80 1749 0 1690 2 0 2 2 0 8 0 amappl1 72 15426 0 14958 16 6 10 16 0 8 0 amappl 72 678 0 650 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 24 331 0 314 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 331 0 314 1 0 1 1 0 8 0 vmmpekpl 168 6100 0 6081 2 0 2 2 0 8 1 vmmpepl 168 35022 0 34059 55 13 42 50 0 357 0 vmsppl 360 330 0 314 2 0 2 2 0 8 0 pdppl 4096 670 0 628 6 0 6 6 0 8 0 pvpl 32 94429 0 91086 32 3 29 29 0 265 2 pmappl 224 330 0 314 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 266 0 4 8 0 8 8 0 8 0 ddb{1}>