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 376091 9026 0 0 0 1 syz-executor7271 *101761 80030 0 0 0x4000000 0K syz-executor7271 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(ffff800020b152c8,ffff800020bdf9b8) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bdf9b8) at namei+0x88b sys/kern/vfs_lookup.c:232 domknodat(ffff800020b152c8,ffffff9c,20000180,2130,5) at domknodat+0xa1 sys/kern/vfs_syscalls.c:1405 syscall(ffff800020bdfc80) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bdfc80) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,8ae7d8be0c8,0,8ae7d8be0a8,8ae7d8be0a0) at Xsyscall+0x128 end of kernel end trace frame: 0x8b16b053ae0, 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(ffff800020b152c8,ffff800020bdf9b8) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bdf9b8) at namei+0x88b sys/kern/vfs_lookup.c:232 domknodat(ffff800020b152c8,ffffff9c,20000180,2130,5) at domknodat+0xa1 sys/kern/vfs_syscalls.c:1405 syscall(ffff800020bdfc80) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bdfc80) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,8ae7d8be0c8,0,8ae7d8be0a8,8ae7d8be0a0) at Xsyscall+0x128 end of kernel end trace frame: 0x8b16b053ae0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020bdf750 rbx 0xffff800020bdf800 rdx 0xffffffff81f8c339 apollo_pio_rec+0x95b5 rcx 0x201 rax 0x1 r8 0xffffffff818d1a13 kprintf+0x183 r9 0x1 r10 0x461bbdd65d89ae6a r11 0xb1f876630ff8a518 r12 0x3000000008 r13 0xffff800020bdf760 r14 0x100 r15 0x1 rip 0xffffffff814367b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020bdf740 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor7271) pid=101761 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b14008,0xffff800020b14270 process=0xffff800020b8cd38 user=0xffff800020bda000, vmspace=0xfffffd807effd9d8 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 9026 376091 54658 0 7 0 syz-executor7271 9026 474415 54658 0 3 0x4000080 fsleep syz-executor7271 9026 336502 54658 0 2 0x4000000 syz-executor7271 80030 411806 11518 0 2 0x480 syz-executor7271 *80030 101761 11518 0 7 0x4000000 syz-executor7271 80030 489228 11518 0 3 0x4000080 fsleep syz-executor7271 11518 252752 92772 0 3 0x80 nanosleep syz-executor7271 54658 413907 92772 0 3 0x80 nanosleep syz-executor7271 92772 496850 54984 0 3 0x82 nanosleep syz-executor7271 54984 192383 89704 0 3 0x10008a pause ksh 89704 150937 93575 0 3 0x92 select sshd 58346 304889 1 0 3 0x100083 ttyin getty 93575 373095 1 0 3 0x80 select sshd 80832 72326 61960 74 3 0x100092 bpf pflogd 61960 250546 1 0 3 0x80 netio pflogd 13029 408087 16145 73 3 0x100090 kqread syslogd 16145 125233 1 0 3 0x100082 netio syslogd 9367 424875 1 77 3 0x100090 poll dhclient 45905 187596 1 0 3 0x80 poll dhclient 47682 48569 0 0 2 0x14200 zerothread 70941 173055 0 0 3 0x14200 aiodoned aiodoned 30053 510874 0 0 3 0x14200 syncer update 10696 229211 0 0 3 0x14200 cleaner cleaner 9670 45531 0 0 3 0x14200 reaper reaper 56543 307608 0 0 3 0x14200 pgdaemon pagedaemon 89077 76928 0 0 3 0x14200 bored crynlk 84691 205286 0 0 3 0x14200 bored crypto 70470 357640 0 0 3 0x40014200 acpi0 acpi0 69476 385566 0 0 3 0x40014200 idle1 80064 298442 0 0 3 0x14200 bored softnet 91343 68779 0 0 3 0x14200 bored systqmp 33146 508596 0 0 3 0x14200 bored systq 96470 504258 0 0 3 0x40014200 bored softclock 53288 483838 0 0 3 0x40014200 idle0 79061 490652 0 0 3 0x14200 bored smr 1 435009 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 80030 (syz-executor7271) thread 0xffff800020b152c8 (101761) exclusive rrwlock inode r = 0 (0xfffffd806ed1bd68) 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 83K 78643K 319 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 66 19K 19K 78643K 809 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 1999 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 16 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 97 0 0 7 0 7 7 0 8 0 art_table 32 98 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 3580 0 3579 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 2328 0 2328 2 1 1 2 0 8 1 sigapl 432 218 0 202 2 0 2 2 0 8 0 futexpl 56 16 0 14 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 488 219 0 202 4 1 3 3 0 8 0 filepl 152 960 0 913 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 20 0 9 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 52 0 43 1 0 1 1 0 8 0 zombiepl 144 202 0 202 2 1 1 1 0 8 1 processpl 840 234 0 202 4 0 4 4 0 8 0 procpl 600 247 0 211 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 69 0 0 9 0 9 9 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 87 0 0 5 0 5 5 0 8 0 bufpl 256 2166 0 275 119 0 119 119 0 8 0 anonpl 16 19784 0 18452 8 2 6 7 0 125 0 amapchunkpl 152 605 0 558 2 0 2 2 0 158 0 amappl16 192 40 0 37 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 6 0 6 1 0 1 1 0 8 1 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 136 412 0 411 1 0 1 1 0 8 0 amappl8 128 114 0 105 1 0 1 1 0 8 0 amappl7 120 16 0 15 1 0 1 1 0 8 0 amappl6 112 46 0 41 1 0 1 1 0 8 0 amappl5 104 142 0 129 1 0 1 1 0 8 0 amappl4 96 429 0 406 1 0 1 1 0 8 0 amappl3 88 106 0 99 1 0 1 1 0 8 0 amappl2 80 744 0 687 2 0 2 2 0 8 0 amappl1 72 13809 0 13320 16 6 10 16 0 8 0 amappl 72 459 0 429 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 24 219 0 202 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 219 0 202 1 0 1 1 0 8 0 vmmpekpl 168 5642 0 5621 2 0 2 2 0 8 1 vmmpepl 168 28059 0 27102 55 13 42 50 0 357 0 vmsppl 360 218 0 202 2 0 2 2 0 8 0 pdppl 4096 446 0 404 7 1 6 6 0 8 0 pvpl 32 82963 0 79652 34 5 29 29 0 265 1 pmappl 224 218 0 202 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 251 0 5 8 0 8 8 0 8 0 ddb{0}>