panic: kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managerspanic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 689 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 175166 29039 0 0 0x4000000 0 syz-executor.0 *442450 88474 0 0 0x4000000 1 syz-executor.1 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(ffffffff81f7eb2c,ffffffff81f6b8b7,2b1,ffffffff81f50acf) at __assert+0x2e sys/kern/subr_prf.c:155 proc_trampoline_mp() at proc_trampoline_mp+0x13b end trace frame: 0x0, count: 11 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(ffffffff81f7eb2c,ffffffff81f6b8b7,2b1,ffffffff81f50acf) at __assert+0x2e sys/kern/subr_prf.c:155 proc_trampoline_mp() at proc_trampoline_mp+0x13b end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020c69b80 rbx 0xffff800020c69c30 rdx 0xffffffff81f89e77 apollo_pio_rec+0x9e22 rcx 0 rax 0 r8 0xffffffff811c43a3 kprintf+0x183 r9 0x1 r10 0x25 r11 0xda9d9faa7e628ab1 r12 0x3000000008 r13 0xffff800020c69b90 r14 0x104 r15 0x1 rip 0xffffffff81e2e758 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020c69b70 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=442450 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020b38978,0xffff800020b39c48 process=0xffff800020b8d3c8 user=0xffff800020c64000, vmspace=0xfffffd807effe2d0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29039 14373 44836 0 2 0 syz-executor.0 29039 175166 44836 0 7 0x4000000 syz-executor.0 88474 441208 82719 0 2 0 syz-executor.1 88474 274991 82719 0 3 0x4000080 ttyin syz-executor.1 88474 403617 82719 0 3 0x4000080 ttyout syz-executor.1 *88474 442450 82719 0 7 0x4000000 syz-executor.1 88474 462564 82719 0 2 0x4000000 syz-executor.1 44836 82514 91975 0 3 0x82 nanosleep syz-executor.0 69301 377843 0 0 3 0x14200 bored sosplice 82719 55669 91975 0 3 0x82 nanosleep syz-executor.1 91975 409765 4968 0 3 0x82 thrsleep syz-fuzzer 91975 372651 4968 0 3 0x4000082 thrsleep syz-fuzzer 91975 483474 4968 0 3 0x4000082 thrsleep syz-fuzzer 91975 337238 4968 0 3 0x4000082 thrsleep syz-fuzzer 91975 403542 4968 0 3 0x4000082 thrsleep syz-fuzzer 91975 401478 4968 0 3 0x4000082 thrsleep syz-fuzzer 91975 296423 4968 0 3 0x4000082 thrsleep syz-fuzzer 91975 104070 4968 0 3 0x4000082 kqread syz-fuzzer 91975 6857 4968 0 3 0x4000082 thrsleep syz-fuzzer 91975 347094 4968 0 3 0x4000082 thrsleep syz-fuzzer 4968 80088 99414 0 3 0x10008a pause ksh 99414 279682 7565 0 3 0x92 select sshd 82966 512380 1 0 3 0x100083 ttyin getty 7565 23575 1 0 3 0x80 select sshd 97205 73793 775 74 3 0x100092 bpf pflogd 775 507161 1 0 3 0x80 netio pflogd 44332 118314 23354 73 3 0x100090 kqread syslogd 23354 224085 1 0 3 0x100082 netio syslogd 17114 152265 1 77 3 0x100090 poll dhclient 66722 458341 1 0 3 0x80 poll dhclient 54122 234378 0 0 2 0x14200 zerothread 80142 291394 0 0 3 0x14200 aiodoned aiodoned 93378 103641 0 0 3 0x14200 syncer update 99569 115002 0 0 3 0x14200 cleaner cleaner 48822 231192 0 0 3 0x14200 reaper reaper 87191 284938 0 0 3 0x14200 pgdaemon pagedaemon 43879 290325 0 0 3 0x14200 bored crynlk 93279 280495 0 0 3 0x14200 bored crypto 46402 422062 0 0 3 0x40014200 acpi0 acpi0 68897 455091 0 0 3 0x40014200 idle1 23290 93685 0 0 3 0x14200 bored softnet 63538 421608 0 0 3 0x14200 bored systqmp 36925 5735 0 0 3 0x14200 bored systq 3356 249348 0 0 3 0x40014200 bored softclock 10807 277481 0 0 3 0x40014200 idle0 47045 384000 0 0 3 0x14200 bored smr 1 56534 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 29039 (syz-executor.0) thread 0xffff800020b38978 (175166) exclusive rrwlock inode r = 0 (0xfffffd806e3965f8) 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 (0xffffffff8234a3d0) 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 9528 6417K 6419K 78643K 10699 0 0 pcb 25 9K 10K 78643K 128 0 0 rtable 100 3K 4K 78643K 274 0 0 ifaddr 62 13K 13K 78643K 100 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1472 0 0 iov 0 0K 16K 78643K 29 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1205 75K 76K 78643K 1339 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 6 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 22 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 6 17K 21K 78643K 219 0 0 proc 56 63K 71K 78643K 382 0 0 subproc 64 65538K 67586K 78643K 102 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 28 0 0 in_multi 33 2K 2K 78643K 59 0 0 ether_multi 1 0K 0K 78643K 4 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 72 318K 318K 78643K 72 0 0 exec 0 0K 1K 78643K 209 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 85 20K 29K 78643K 1534 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 17 0 0 NDP 13 0K 0K 78643K 28 0 0 temp 140 2366K 2433K 78643K 3830 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 5 0 1 1 0 1 1 0 8 0 inpcbpl 280 154 0 147 1 0 1 1 0 8 0 plimitpl 152 25 0 17 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 50 0 10 2 0 2 2 0 8 0 syncache 264 4 0 4 2 2 0 1 0 8 0 tcpcb 544 50 0 46 1 0 1 1 0 8 0 nd6 48 6 0 2 1 0 1 1 0 8 0 ppxss 1128 6 0 6 3 2 1 1 0 8 1 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 13 0 3 1 0 1 1 0 8 0 pfstkey 112 13 0 3 1 0 1 1 0 8 0 pfstate 328 13 0 3 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 256 229 0 41 12 0 12 12 0 8 0 art_table 32 230 0 41 2 0 2 2 0 8 0 art_node 16 49 0 15 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 20 0 10 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 1803 0 381 46 0 46 46 0 8 0 ffsino 272 1803 0 381 96 0 96 96 0 8 1 nchpl 144 2313 0 679 61 0 61 61 0 8 0 uvmvnodes 72 1891 0 0 35 0 35 35 0 8 0 vnodes 200 1891 0 0 100 0 100 100 0 8 0 namei 1024 6322 0 6321 3 2 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 5974 0 5974 8 7 1 6 0 8 1 sigapl 432 415 0 399 2 0 2 2 0 8 0 futexpl 56 1992 0 1992 1 0 1 1 0 8 1 knotepl 112 109 0 90 1 0 1 1 0 8 0 kqueuepl 104 43 0 41 1 0 1 1 0 8 0 pipepl 112 278 0 259 3 2 1 1 0 8 0 fdescpl 488 416 0 399 3 0 3 3 0 8 0 filepl 152 2250 0 2148 5 0 5 5 0 8 1 lockfpl 104 57 0 57 2 1 1 1 0 8 1 lockfspl 32 86 0 86 2 1 1 1 0 8 1 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 21 0 10 1 0 1 1 0 8 0 ucredpl 96 359 0 350 1 0 1 1 0 8 0 zombiepl 144 399 0 399 3 2 1 1 0 8 1 processpl 840 432 0 399 4 0 4 4 0 8 0 procpl 600 852 0 805 5 0 5 5 0 8 1 srpgc 64 6 0 6 1 0 1 1 0 8 1 sosppl 128 2 0 2 1 1 0 1 0 8 0 sockpl 384 250 0 231 3 0 3 3 0 8 1 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 127 0 0 14 0 14 14 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 147 0 0 8 0 8 8 0 8 0 bufpl 256 6064 0 1143 308 0 308 308 0 8 0 anonpl 16 56163 0 48232 54 7 47 51 0 125 12 amapchunkpl 152 2549 0 2446 13 1 12 12 0 158 6 amappl16 192 1822 0 1387 34 8 26 34 0 8 4 amappl15 184 59 0 54 1 0 1 1 0 8 0 amappl14 176 125 0 120 3 2 1 1 0 8 0 amappl13 168 26 0 23 1 0 1 1 0 8 0 amappl12 160 15 0 14 2 1 1 1 0 8 0 amappl11 152 23 0 8 1 0 1 1 0 8 0 amappl10 144 67 0 63 1 0 1 1 0 8 0 amappl9 136 653 0 650 1 0 1 1 0 8 0 amappl8 128 211 0 197 1 0 1 1 0 8 0 amappl7 120 33 0 28 1 0 1 1 0 8 0 amappl6 112 59 0 50 1 0 1 1 0 8 0 amappl5 104 116 0 102 1 0 1 1 0 8 0 amappl4 96 635 0 603 2 1 1 2 0 8 0 amappl3 88 202 0 196 1 0 1 1 0 8 0 amappl2 80 2439 0 2371 2 0 2 2 0 8 0 amappl1 72 18464 0 18009 25 15 10 20 0 8 0 amappl 72 1105 0 1065 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 24 416 0 399 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 416 0 399 1 0 1 1 0 8 0 vmmpekpl 168 7389 0 7365 2 0 2 2 0 8 0 vmmpepl 168 51338 0 49807 89 11 78 78 0 357 11 vmsppl 360 415 0 399 2 0 2 2 0 8 0 pdppl 4096 840 0 798 6 0 6 6 0 8 0 pvpl 32 176545 0 165292 144 16 128 132 0 265 33 pmappl 224 415 0 399 2 1 1 2 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 460 0 5 13 0 13 13 0 8 0