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 497565 14994 32767 0x10 0 0 syz-executor.0 *122159 14994 32767 0x10 0x4000000 1K 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(ffffffff81f7c61c,ffffffff81f2d7dd,36f,ffffffff81f8730a) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b744c8,ffff800020c275a8) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020c275a8) at namei+0x88b sys/kern/vfs_lookup.c:232 dofchownat(ffff800020b744c8,ffffff9c,200000c0,0,0,0) at dofchownat+0xcd sys/kern/vfs_syscalls.c:2269 syscall(ffff800020c27870) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c27870) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff05,0,3,fe2f519c010) at Xsyscall+0x128 end of kernel end trace frame: 0xfe5d99c5740, 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/setuid/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(ffffffff81f7c61c,ffffffff81f2d7dd,36f,ffffffff81f8730a) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b744c8,ffff800020c275a8) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020c275a8) at namei+0x88b sys/kern/vfs_lookup.c:232 dofchownat(ffff800020b744c8,ffffff9c,200000c0,0,0,0) at dofchownat+0xcd sys/kern/vfs_syscalls.c:2269 syscall(ffff800020c27870) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020c27870) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,ffffffffffffff05,0,3,fe2f519c010) at Xsyscall+0x128 end of kernel end trace frame: 0xfe5d99c5740, count: -8 ddb{1}> show registers rdi 0xffffffff81266357 db_enter+0x17 rsi 0x39da __ALIGN_SIZE+0x29da rbp 0xffff800020c27330 rbx 0xffff800020c273e0 rdx 0x39db __ALIGN_SIZE+0x29db rcx 0xffff800000f4b000 rax 0xffff800000f4b000 r8 0xffffffff813481d3 kprintf+0x183 r9 0x1 r10 0x25 r11 0xc5e7945e3d874e6c r12 0x3000000008 r13 0xffff800020c27340 r14 0x100 r15 0x1 rip 0xffffffff81266358 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c27320 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=122159 stat=onproc flags process=10 proc=4000000 pri=79, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800020b75788,0xffffffff8235ec20 process=0xffff800020b3a358 user=0xffff800020c22000, vmspace=0xfffffd807effeb40 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 14994 497565 31320 32767 7 0x10 syz-executor.0 *14994 122159 31320 32767 7 0x4000010 syz-executor.0 31320 153912 93500 32767 3 0x90 nanosleep syz-executor.0 93500 488227 65608 0 3 0x82 wait syz-executor.0 87930 40287 79196 32767 3 0x10 biowait syz-executor.1 79196 402306 65608 0 3 0x82 wait syz-executor.1 66470 102958 0 0 3 0x14200 bored sosplice 65608 46610 50850 0 3 0x82 thrsleep syz-fuzzer 65608 463149 50850 0 3 0x4000082 nanosleep syz-fuzzer 65608 170497 50850 0 3 0x4000082 thrsleep syz-fuzzer 65608 264080 50850 0 3 0x4000082 thrsleep syz-fuzzer 65608 519087 50850 0 3 0x4000082 thrsleep syz-fuzzer 65608 163433 50850 0 3 0x4000082 nanosleep syz-fuzzer 65608 382480 50850 0 3 0x4000082 thrsleep syz-fuzzer 65608 27583 50850 0 3 0x4000082 kqread syz-fuzzer 65608 206618 50850 0 3 0x4000082 thrsleep syz-fuzzer 65608 382676 50850 0 3 0x4000082 thrsleep syz-fuzzer 50850 275578 47322 0 3 0x10008a pause ksh 47322 11452 70501 0 3 0x92 select sshd 12946 118477 1 0 3 0x100083 ttyin getty 70501 363479 1 0 3 0x80 select sshd 74424 367617 90621 73 3 0x100090 kqread syslogd 90621 334533 1 0 3 0x100082 netio syslogd 76845 121550 1 77 3 0x100090 poll dhclient 94228 454120 1 0 3 0x80 poll dhclient 34216 168995 0 0 3 0x14200 pgzero zerothread 73970 155648 0 0 3 0x14200 aiodoned aiodoned 49432 493519 0 0 3 0x14200 syncer update 35033 154359 0 0 3 0x14200 cleaner cleaner 17087 287938 0 0 3 0x14200 reaper reaper 23235 93121 0 0 3 0x14200 pgdaemon pagedaemon 94183 430553 0 0 3 0x14200 bored crynlk 68750 439074 0 0 3 0x14200 bored crypto 35619 240419 0 0 3 0x40014200 acpi0 acpi0 42444 236410 0 0 3 0x40014200 idle1 59559 244066 0 0 3 0x14200 bored softnet 70697 330765 0 0 3 0x14200 bored systqmp 95233 380688 0 0 3 0x14200 bored systq 71921 96637 0 0 3 0x40014200 bored softclock 34382 446284 0 0 3 0x40014200 idle0 82803 46805 0 0 3 0x14200 bored smr 1 346792 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 14994 (syz-executor.0) thread 0xffff800020b744c8 (122159) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82397440) 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 Process 87930 (syz-executor.1) thread 0xffff800020b74bd0 (40287) exclusive rrwlock inode r = 0 (0xfffffd807acc0810) locked @ /syzkaller/managers/setuid/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 (0xfffffd8069d33c48) 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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9458 6320K 6320K 78643K 10595 0 0 pcb 23 9K 11K 78643K 236 0 0 rtable 97 3K 3K 78643K 502 0 0 ifaddr 35 10K 10K 78643K 97 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 2K 78643K 29 0 0 iov 0 0K 12K 78643K 46 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1200 75K 75K 78643K 1458 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 9 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 1K 78643K 71 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 7 21K 33K 78643K 408 0 0 sigio 0 0K 0K 78643K 7 0 0 proc 44 50K 70K 78643K 492 0 0 subproc 68 69634K 69634K 78643K 408 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 35 0 0 in_multi 33 2K 2K 78643K 148 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 246 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 78 20K 29K 78643K 2057 0 0 UVM aobj 24 2K 2K 78643K 30 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 9 0 0 NDP 5 0K 0K 78643K 39 0 0 temp 94 2371K 2437K 78643K 4399 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 14 0 10 1 0 1 1 0 8 0 inpcbpl 280 219 0 212 1 0 1 1 0 8 0 plimitpl 152 55 0 46 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 131 0 91 2 0 2 2 0 8 0 syncache 264 4 0 4 2 2 0 1 0 8 0 tcpcb 544 79 0 75 1 0 1 1 0 8 0 nd6 48 24 0 20 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 602 0 417 12 0 12 12 0 8 0 art_table 32 603 0 417 2 0 2 2 0 8 0 art_node 16 130 0 96 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 67 0 57 1 0 1 1 0 8 0 shmpl 112 28 0 6 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1909 0 491 46 0 46 46 0 8 0 ffsino 272 1909 0 491 95 0 95 95 0 8 0 nchpl 144 2657 0 1044 61 1 60 61 0 8 0 uvmvnodes 72 2122 0 0 39 0 39 39 0 8 0 vnodes 200 2122 0 0 112 0 112 112 0 8 0 namei 1024 7864 0 7862 3 2 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 7487 0 7486 11 10 1 6 0 8 0 sigapl 432 548 0 533 3 1 2 3 0 8 0 futexpl 56 3737 0 3737 1 0 1 1 0 8 1 knotepl 112 341 0 322 1 0 1 1 0 8 0 kqueuepl 104 97 0 95 1 0 1 1 0 8 0 pipepl 112 420 0 401 4 3 1 2 0 8 0 fdescpl 488 549 0 533 3 0 3 3 0 8 0 filepl 152 3423 0 3326 6 1 5 5 0 8 1 lockfpl 104 114 0 113 2 1 1 1 0 8 0 lockfspl 32 255 0 254 2 1 1 1 0 8 0 sessionpl 112 27 0 17 1 0 1 1 0 8 0 pgrppl 48 31 0 21 1 0 1 1 0 8 0 ucredpl 96 868 0 859 1 0 1 1 0 8 0 zombiepl 144 533 0 533 3 2 1 1 0 8 1 processpl 840 565 0 533 4 0 4 4 0 8 0 procpl 600 1286 0 1244 5 0 5 5 0 8 1 srpgc 64 58 0 58 2 1 1 1 0 8 1 sosppl 128 4 0 4 2 1 1 1 0 8 1 sockpl 384 446 0 429 4 1 3 4 0 8 1 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 129 0 0 15 0 15 15 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 165 0 0 9 0 9 9 0 8 0 bufpl 256 6357 0 1122 328 0 328 328 0 8 0 anonpl 16 59393 0 53636 40 12 28 36 0 125 0 amapchunkpl 152 3357 0 3272 12 7 5 9 0 158 0 amappl16 192 1940 0 1604 20 1 19 19 0 8 1 amappl15 184 165 0 161 1 0 1 1 0 8 0 amappl14 176 70 0 65 3 2 1 1 0 8 0 amappl13 168 54 0 46 1 0 1 1 0 8 0 amappl12 160 34 0 30 2 1 1 1 0 8 0 amappl11 152 54 0 43 1 0 1 1 0 8 0 amappl10 144 143 0 140 3 2 1 1 0 8 0 amappl9 136 597 0 594 1 0 1 1 0 8 0 amappl8 128 173 0 158 1 0 1 1 0 8 0 amappl7 120 139 0 134 1 0 1 1 0 8 0 amappl6 112 61 0 55 1 0 1 1 0 8 0 amappl5 104 143 0 133 1 0 1 1 0 8 0 amappl4 96 708 0 683 1 0 1 1 0 8 0 amappl3 88 149 0 143 1 0 1 1 0 8 0 amappl2 80 3563 0 3506 2 0 2 2 0 8 0 amappl1 72 21399 0 20959 24 14 10 19 0 8 0 amappl 72 1577 0 1542 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 29 0 6 1 0 1 1 0 8 0 uaddrrnd 24 549 0 533 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 549 0 533 1 0 1 1 0 8 0 vmmpekpl 168 8405 0 8382 2 0 2 2 0 8 0 vmmpepl 168 67706 0 66338 98 29 69 72 0 357 9 vmsppl 360 548 0 533 2 0 2 2 0 8 0 pdppl 4096 1106 0 1066 6 0 6 6 0 8 0 pvpl 32 204073 0 195055 126 39 87 102 0 265 6 pmappl 224 548 0 533 2 1 1 2 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 478 0 4 14 0 14 14 0 8 0