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 198528 51365 0 0x2 0 0 syz-executor9683 *241152 51365 0 0x2 0x4000000 1K syz-executor9683 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(ffff800020b75078,ffff800020bb1210) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bb1210) at namei+0x88b sys/kern/vfs_lookup.c:232 vn_open(ffff800020bb1210,212,0) at vn_open+0x157 sys/kern/vfs_vnops.c:103 doopenat(ffff800020b75078,ffffff9c,20000180,611,0,ffff800020bb1450) at doopenat+0x2ca sys/kern/vfs_syscalls.c:1045 syscall(ffff800020bb1500) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bb1500) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ca247aac0b8,0,ca247aac098,ca247aac090) at Xsyscall+0x128 end of kernel end trace frame: 0xca499a5f5b0, count: 6 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(ffff800020b75078,ffff800020bb1210) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bb1210) at namei+0x88b sys/kern/vfs_lookup.c:232 vn_open(ffff800020bb1210,212,0) at vn_open+0x157 sys/kern/vfs_vnops.c:103 doopenat(ffff800020b75078,ffffff9c,20000180,611,0,ffff800020bb1450) at doopenat+0x2ca sys/kern/vfs_syscalls.c:1045 syscall(ffff800020bb1500) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bb1500) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ca247aac0b8,0,ca247aac098,ca247aac090) at Xsyscall+0x128 end of kernel end trace frame: 0xca499a5f5b0, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020bb0e50 rbx 0xffff800020bb0f00 rdx 0xffffffff81f8b3e6 apollo_pio_rec+0x9d5d rcx 0x201 rax 0x1 r8 0xffffffff81b94ad3 kprintf+0x183 r9 0x1 r10 0x5bb1b23acfbe75a3 r11 0xa888b66badbec752 r12 0x3000000008 r13 0xffff800020bb0e60 r14 0x100 r15 0x1 rip 0xffffffff81d528d8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020bb0e40 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor9683) pid=241152 stat=onproc flags process=2 proc=4000000 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020b74e20,0xffffffff82377160 process=0xffff800020b2a358 user=0xffff800020bac000, vmspace=0xfffffd806e8149e0 estcpu=0, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 51365 198528 63626 0 7 0x2 syz-executor9683 *51365 241152 63626 0 7 0x4000002 syz-executor9683 63626 114932 37627 0 3 0x10008a pause ksh 37627 60652 33113 0 3 0x92 select sshd 11719 270397 1 0 3 0x100083 ttyin getty 33113 342745 1 0 3 0x80 select sshd 94049 267381 45892 74 3 0x100092 bpf pflogd 45892 326190 1 0 3 0x80 netio pflogd 41777 176686 84352 73 3 0x100090 kqread syslogd 84352 227310 1 0 3 0x100082 netio syslogd 79520 491412 1 77 3 0x100090 poll dhclient 71674 469876 1 0 3 0x80 poll dhclient 84751 367349 0 0 3 0x14200 pgzero zerothread 10031 492130 0 0 3 0x14200 aiodoned aiodoned 30793 325578 0 0 3 0x14200 syncer update 87744 229489 0 0 3 0x14200 cleaner cleaner 60050 123968 0 0 3 0x14200 reaper reaper 14473 284940 0 0 3 0x14200 pgdaemon pagedaemon 84049 67942 0 0 3 0x14200 bored crynlk 31454 160266 0 0 3 0x14200 bored crypto 53379 515221 0 0 3 0x40014200 acpi0 acpi0 23882 221787 0 0 3 0x40014200 idle1 2503 365984 0 0 3 0x14200 bored softnet 35868 290087 0 0 3 0x14200 bored systqmp 21072 187237 0 0 3 0x14200 bored systq 13336 278764 0 0 3 0x40014200 bored softclock 1149 462045 0 0 3 0x40014200 idle0 1365 13002 0 0 3 0x14200 bored smr 1 110047 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 51365 (syz-executor9683) thread 0xffff800020b75078 (241152) exclusive rrwlock inode r = 0 (0xfffffd806ddfc3d0) 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 vget+0x1c3 sys/kern/vfs_subr.c:672 #6 cache_lookup+0x300 sys/kern/vfs_cache.c:224 #7 ufs_lookup+0x1d7 sys/ufs/ufs/ufs_lookup.c:162 #8 VOP_LOOKUP+0x67 sys/kern/vfs_vops.c:90 #9 vfs_lookup+0x556 sys/kern/vfs_lookup.c:523 #10 namei+0x4b2 sys/kern/vfs_lookup.c:224 #11 vn_open+0x157 sys/kern/vfs_vnops.c:103 #12 doopenat+0x2ca sys/kern/vfs_syscalls.c:1045 #13 syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] #13 syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806eb19f78) 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 vn_open+0x157 sys/kern/vfs_vnops.c:103 #8 doopenat+0x2ca sys/kern/vfs_syscalls.c:1045 #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 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 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 56 3K 3K 78643K 766 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{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 1391 0 17 45 0 45 45 0 8 0 ffsino 272 1391 0 17 92 0 92 92 0 8 0 nchpl 144 1565 0 32 57 0 57 57 0 8 0 uvmvnodes 72 1401 0 0 26 0 26 26 0 8 0 vnodes 200 1401 0 0 74 0 74 74 0 8 0 namei 1024 3562 0 3561 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 2319 0 2319 2 1 1 2 0 8 1 sigapl 432 205 0 193 2 0 2 2 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 0 913 2 0 2 2 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 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 600 222 0 193 3 0 3 3 0 8 0 sockpl 384 73 0 55 2 0 2 2 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 56 0 0 7 0 7 7 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 76 0 0 5 0 5 5 0 8 0 bufpl 256 2165 0 275 119 0 119 119 0 8 0 anonpl 16 19150 0 17903 8 2 6 7 0 125 0 amapchunkpl 152 554 0 515 2 0 2 2 0 158 0 amappl16 192 31 0 29 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 9 0 9 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 136 423 0 422 1 0 1 1 0 8 0 amappl8 128 100 0 95 1 0 1 1 0 8 0 amappl7 120 17 0 15 1 0 1 1 0 8 0 amappl6 112 45 0 41 1 0 1 1 0 8 0 amappl5 104 123 0 110 1 0 1 1 0 8 0 amappl4 96 434 0 409 1 0 1 1 0 8 0 amappl3 88 105 0 99 1 0 1 1 0 8 0 amappl2 80 587 0 539 1 0 1 1 0 8 0 amappl1 72 13611 0 13184 15 5 10 15 0 8 0 amappl 72 427 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 5599 0 5577 2 0 2 2 0 8 0 vmmpepl 168 27103 0 26294 46 9 37 46 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 81763 0 78646 33 4 29 29 0 265 3 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 112 247 0 4 7 0 7 7 0 8 0 ddb{1}>