login: panic: kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_unveil.c", line 879 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 241949 5040 32767 0x10 0 1 syz-executor.0 *115543 5040 32767 0x10 0x4000000 0K syz-executor.0 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(ffffffff81f7bdfb,ffffffff81f325a7,36f,ffffffff81f8b7f3) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b38bd0,ffff800020c45208) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020c45208) at namei+0x88b sys/kern/vfs_lookup.c:232 domkdirat(ffff800020b38bd0,ffffff9c,200000c0,fffffff4) at domkdirat+0x81 sys/kern/vfs_syscalls.c:2866 syscall(ffff800020c454c0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c454c0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff94,0,2,add6d7aa010) at Xsyscall+0x128 end of kernel end trace frame: 0xae0019f7760, 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/setuid/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(ffffffff81f7bdfb,ffffffff81f325a7,36f,ffffffff81f8b7f3) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b38bd0,ffff800020c45208) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020c45208) at namei+0x88b sys/kern/vfs_lookup.c:232 domkdirat(ffff800020b38bd0,ffffff9c,200000c0,fffffff4) at domkdirat+0x81 sys/kern/vfs_syscalls.c:2866 syscall(ffff800020c454c0) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c454c0) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff94,0,2,add6d7aa010) at Xsyscall+0x128 end of kernel end trace frame: 0xae0019f7760, count: -8 ddb{0}> show registers rdi 0xffffffff8188e157 db_enter+0x17 rsi 0x38ac __ALIGN_SIZE+0x28ac rbp 0xffff800020c44fb0 rbx 0xffff800020c45060 rdx 0x38ad __ALIGN_SIZE+0x28ad rcx 0xffff800001b4b000 rax 0xffff800001b4b000 r8 0xffffffff81e2f083 kprintf+0x183 r9 0x1 r10 0x25 r11 0xf489f433790a5201 r12 0x3000000008 r13 0xffff800020c44fc0 r14 0x100 r15 0x1 rip 0xffffffff8188e158 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c44fa0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=115543 stat=onproc flags process=10 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b39788,0xffffffff82352f38 process=0xffff800020b3ad30 user=0xffff800020c40000, vmspace=0xfffffd807effd5a0 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 5040 241949 71521 32767 7 0x10 syz-executor.0 * 5040 115543 71521 32767 7 0x4000010 syz-executor.0 71521 25933 15164 32767 2 0x490 syz-executor.0 15164 240442 27470 0 3 0x82 wait syz-executor.0 32632 494499 0 0 3 0x14200 bored sosplice 69927 127346 89771 32767 2 0x490 syz-executor.1 89771 434129 27470 0 3 0x82 wait syz-executor.1 27470 468495 627 0 3 0x82 thrsleep syz-fuzzer 27470 349497 627 0 3 0x4000082 thrsleep syz-fuzzer 27470 512147 627 0 3 0x4000082 thrsleep syz-fuzzer 27470 414161 627 0 3 0x4000082 thrsleep syz-fuzzer 27470 499318 627 0 3 0x4000082 thrsleep syz-fuzzer 27470 314039 627 0 3 0x4000082 thrsleep syz-fuzzer 27470 22065 627 0 3 0x4000082 thrsleep syz-fuzzer 27470 330105 627 0 3 0x4000082 kqread syz-fuzzer 27470 63129 627 0 3 0x4000082 thrsleep syz-fuzzer 27470 270818 627 0 3 0x4000082 thrsleep syz-fuzzer 627 442166 33196 0 3 0x10008a pause ksh 33196 198473 74725 0 3 0x92 select sshd 5822 411961 1 0 3 0x100083 ttyin getty 74725 442252 1 0 3 0x80 select sshd 60697 193917 9150 73 3 0x100090 kqread syslogd 9150 286893 1 0 3 0x100082 netio syslogd 4807 323259 1 77 3 0x100090 poll dhclient 27630 90641 1 0 3 0x80 poll dhclient 62514 439341 0 0 3 0x14200 pgzero zerothread 45581 266344 0 0 3 0x14200 aiodoned aiodoned 94472 62583 0 0 3 0x14200 syncer update 26838 384910 0 0 3 0x14200 cleaner cleaner 77738 195899 0 0 3 0x14200 reaper reaper 32410 325379 0 0 3 0x14200 pgdaemon pagedaemon 59163 154498 0 0 3 0x14200 bored crynlk 58398 282512 0 0 3 0x14200 bored crypto 1014 359 0 0 3 0x40014200 acpi0 acpi0 29848 410457 0 0 3 0x40014200 idle1 39143 7989 0 0 3 0x14200 bored softnet 33219 359008 0 0 3 0x14200 bored systqmp 19180 256346 0 0 3 0x14200 bored systq 46790 250034 0 0 3 0x40014200 bored softclock 84215 235904 0 0 3 0x40014200 idle0 84315 49804 0 0 3 0x14200 bored smr 1 437682 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 5040 (syz-executor.0) thread 0xffff800020b38bd0 (115543) exclusive rrwlock inode r = 0 (0xfffffd806977d2c0) locked @ /syzkaller/managers/setuid/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 (0xffffffff82342968) locked @ /syzkaller/managers/setuid/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 9458 6320K 6320K 78643K 10555 0 0 pcb 23 9K 10K 78643K 111 0 0 rtable 97 3K 3K 78643K 231 0 0 ifaddr 34 9K 9K 78643K 46 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 2K 78643K 21 0 0 iov 0 0K 20K 78643K 8 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1200 75K 75K 78643K 1248 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 4 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 24 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 7 21K 33K 78643K 117 0 0 proc 44 50K 70K 78643K 308 0 0 subproc 68 69634K 69634K 78643K 136 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 11 0 0 in_multi 33 2K 2K 78643K 57 0 0 ether_multi 1 0K 0K 78643K 2 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 48 212K 212K 78643K 48 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 79 20K 21K 78643K 1088 0 0 UVM aobj 10 2K 2K 78643K 10 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 14 0 0 NDP 7 0K 0K 78643K 15 0 0 temp 88 2366K 2430K 78643K 3233 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 6 0 2 1 0 1 1 0 8 0 inpcbpl 280 99 0 92 1 0 1 1 0 8 0 plimitpl 152 26 0 17 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 59 0 19 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 40 0 36 1 0 1 1 0 8 0 nd6 48 8 0 4 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 267 0 82 12 0 12 12 0 8 0 art_table 32 268 0 82 2 0 2 2 0 8 0 art_node 16 58 0 24 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 22 0 12 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1537 0 126 46 0 46 46 0 8 0 ffsino 272 1537 0 126 95 0 95 95 0 8 0 nchpl 144 1894 0 284 61 1 60 61 0 8 0 uvmvnodes 72 1614 0 0 30 0 30 30 0 8 0 vnodes 200 1614 0 0 85 0 85 85 0 8 0 namei 1024 4842 0 4841 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 4765 0 4765 8 6 2 6 0 8 2 sigapl 432 281 0 266 3 1 2 3 0 8 0 futexpl 56 1049 0 1049 1 0 1 1 0 8 1 knotepl 112 108 0 89 1 0 1 1 0 8 0 kqueuepl 104 36 0 34 1 0 1 1 0 8 0 pipepl 112 206 0 187 3 1 2 2 0 8 0 fdescpl 488 282 0 266 3 0 3 3 0 8 1 filepl 152 1531 0 1435 6 1 5 5 0 8 1 lockfpl 104 14 0 14 2 1 1 1 0 8 1 lockfspl 32 7 0 7 2 1 1 1 0 8 1 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 23 0 13 1 0 1 1 0 8 0 ucredpl 96 172 0 163 1 0 1 1 0 8 0 zombiepl 144 266 0 265 2 1 1 1 0 8 0 processpl 840 298 0 265 4 0 4 4 0 8 0 procpl 600 479 0 436 4 0 4 4 0 8 0 srpgc 64 12 0 12 2 1 1 1 0 8 1 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 384 197 0 180 3 0 3 3 0 8 1 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 141 0 0 17 0 17 17 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 160 0 0 9 0 9 9 0 8 0 bufpl 256 5708 0 1122 287 0 287 287 0 8 0 anonpl 16 43044 0 37235 45 1 44 44 0 125 16 amapchunkpl 152 1349 0 1262 9 0 9 9 0 158 4 amappl16 192 1172 0 843 33 8 25 29 0 8 8 amappl15 184 53 0 46 1 0 1 1 0 8 0 amappl14 176 68 0 63 2 1 1 1 0 8 0 amappl13 168 26 0 23 1 0 1 1 0 8 0 amappl12 160 92 0 89 1 0 1 1 0 8 0 amappl11 152 26 0 13 1 0 1 1 0 8 0 amappl10 144 63 0 61 2 1 1 1 0 8 0 amappl9 136 550 0 547 1 0 1 1 0 8 0 amappl8 128 130 0 115 1 0 1 1 0 8 0 amappl7 120 31 0 26 1 0 1 1 0 8 0 amappl6 112 60 0 50 1 0 1 1 0 8 0 amappl5 104 196 0 185 1 0 1 1 0 8 0 amappl4 96 436 0 408 2 1 1 2 0 8 0 amappl3 88 161 0 154 1 0 1 1 0 8 0 amappl2 80 1379 0 1324 2 0 2 2 0 8 0 amappl1 72 14796 0 14359 23 13 10 19 0 8 0 amappl 72 698 0 663 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 282 0 266 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 282 0 266 1 0 1 1 0 8 0 vmmpekpl 168 6209 0 6185 2 0 2 2 0 8 0 vmmpepl 168 37780 0 36420 90 15 75 75 0 357 14 vmsppl 360 281 0 266 2 0 2 2 0 8 0 pdppl 4096 572 0 532 6 0 6 6 0 8 0 pvpl 32 138048 0 129006 126 8 118 118 0 265 38 pmappl 224 281 0 266 2 1 1 2 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 437 0 3 13 0 13 13 0 8 0