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 *204278 40534 0 0 0x4000000 1K syz-executor7907 472343 91152 0 0 0 0 syz-executor7907 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,ffffffff81f800b9,36f,ffffffff81f8afb5) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b144b8,ffff800020bd9c10) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bd9c10) at namei+0x88b sys/kern/vfs_lookup.c:232 vn_open(ffff800020bd9c10,212,0) at vn_open+0x157 sys/kern/vfs_vnops.c:103 doopenat(ffff800020b144b8,ffffff9c,20000180,611,0,ffff800020bd9e50) at doopenat+0x2ca sys/kern/vfs_syscalls.c:1045 syscall(ffff800020bd9f00) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bd9f00) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,c6c7b1ba0c8,0,c6c7b1ba0a8,c6c7b1ba0a0) at Xsyscall+0x128 end of kernel end trace frame: 0xc6f57453ec0, 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(ffffffff81f7eb2c,ffffffff81f800b9,36f,ffffffff81f8afb5) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b144b8,ffff800020bd9c10) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bd9c10) at namei+0x88b sys/kern/vfs_lookup.c:232 vn_open(ffff800020bd9c10,212,0) at vn_open+0x157 sys/kern/vfs_vnops.c:103 doopenat(ffff800020b144b8,ffffff9c,20000180,611,0,ffff800020bd9e50) at doopenat+0x2ca sys/kern/vfs_syscalls.c:1045 syscall(ffff800020bd9f00) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bd9f00) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,c6c7b1ba0c8,0,c6c7b1ba0a8,c6c7b1ba0a0) at Xsyscall+0x128 end of kernel end trace frame: 0xc6f57453ec0, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020bd9850 rbx 0xffff800020bd9900 rdx 0xffffffff81f89e77 apollo_pio_rec+0x9e22 rcx 0x201 rax 0x1 r8 0xffffffff811c43a3 kprintf+0x183 r9 0x1 r10 0x1865038565925775 r11 0x141617d2a0e12017 r12 0x3000000008 r13 0xffff800020bd9860 r14 0x100 r15 0x1 rip 0xffffffff81e2e758 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020bd9840 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor7907) pid=204278 stat=onproc flags process=0 proc=4000000 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020b15520,0xffff800020b14018 process=0xffff800020b8c360 user=0xffff800020bd4000, vmspace=0xfffffd807effe870 estcpu=4, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 40534 231316 28751 0 3 0x80 nanosleep syz-executor7907 *40534 204278 28751 0 7 0x4000000 syz-executor7907 40534 56060 28751 0 3 0x4000080 fsleep syz-executor7907 91152 472343 15904 0 7 0 syz-executor7907 91152 163006 15904 0 2 0x4000000 syz-executor7907 91152 116165 15904 0 2 0x4000000 syz-executor7907 15904 9376 68746 0 3 0x80 nanosleep syz-executor7907 28751 99849 68746 0 3 0x80 nanosleep syz-executor7907 68746 224820 92819 0 3 0x82 nanosleep syz-executor7907 92819 296244 14493 0 3 0x10008a pause ksh 14493 437580 33612 0 3 0x92 select sshd 31029 199440 1 0 3 0x100083 ttyin getty 33612 160569 1 0 3 0x80 select sshd 39938 216010 97542 74 3 0x100092 bpf pflogd 97542 163421 1 0 3 0x80 netio pflogd 18693 337033 72466 73 3 0x100090 kqread syslogd 72466 324487 1 0 3 0x100082 netio syslogd 21101 437690 1 77 3 0x100090 poll dhclient 26766 242550 1 0 3 0x80 poll dhclient 98416 492641 0 0 2 0x14200 zerothread 32933 244045 0 0 3 0x14200 aiodoned aiodoned 71371 428004 0 0 3 0x14200 syncer update 37149 490333 0 0 3 0x14200 cleaner cleaner 67449 12932 0 0 3 0x14200 reaper reaper 87070 334443 0 0 3 0x14200 pgdaemon pagedaemon 98151 306782 0 0 3 0x14200 bored crynlk 5914 100991 0 0 3 0x14200 bored crypto 89497 351069 0 0 3 0x40014200 acpi0 acpi0 16723 454807 0 0 3 0x40014200 idle1 57932 302042 0 0 3 0x14200 bored softnet 28150 432023 0 0 3 0x14200 bored systqmp 21730 29695 0 0 3 0x14200 bored systq 78438 263367 0 0 3 0x40014200 bored softclock 42473 410447 0 0 3 0x40014200 idle0 9496 496774 0 0 3 0x14200 bored smr 1 264060 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 40534 (syz-executor7907) thread 0xffff800020b144b8 (204278) exclusive rrwlock inode r = 0 (0xfffffd806d9d3700) 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 (0xfffffd806ed1bf88) 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 (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 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 83K 78643K 299 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 62 3K 3K 78643K 786 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{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 2 1 0 1 1 0 8 0 pfstkey 112 8 0 2 1 0 1 1 0 8 0 pfstate 328 8 0 2 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 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 3579 0 3578 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 2452 0 2452 8 7 1 6 0 8 1 sigapl 432 213 0 197 2 0 2 2 0 8 0 futexpl 56 39 0 38 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 488 214 0 197 3 0 3 3 0 8 0 filepl 152 970 0 922 2 0 2 2 0 8 0 lockfpl 104 14 0 14 2 1 1 1 0 8 1 lockfspl 32 5 0 5 2 1 1 1 0 8 1 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 144 197 0 197 2 1 1 1 0 8 1 processpl 840 229 0 197 4 0 4 4 0 8 0 procpl 600 239 0 203 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 77 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 97 0 0 6 0 6 6 0 8 0 bufpl 256 2166 0 275 119 0 119 119 0 8 0 anonpl 16 19379 0 18058 8 2 6 7 0 125 0 amapchunkpl 152 576 0 531 2 0 2 2 0 158 0 amappl16 192 36 0 34 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 29 0 14 1 0 1 1 0 8 0 amappl10 144 58 0 56 1 0 1 1 0 8 0 amappl9 136 420 0 419 1 0 1 1 0 8 0 amappl8 128 107 0 98 1 0 1 1 0 8 0 amappl7 120 18 0 17 1 0 1 1 0 8 0 amappl6 112 46 0 42 1 0 1 1 0 8 0 amappl5 104 132 0 118 1 0 1 1 0 8 0 amappl4 96 439 0 413 1 0 1 1 0 8 0 amappl3 88 106 0 98 1 0 1 1 0 8 0 amappl2 80 646 0 590 2 0 2 2 0 8 0 amappl1 72 13660 0 13192 16 6 10 16 0 8 0 amappl 72 442 0 415 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 24 214 0 197 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 214 0 197 1 0 1 1 0 8 0 vmmpekpl 168 5605 0 5584 2 0 2 2 0 8 0 vmmpepl 168 27624 0 26684 56 14 42 48 0 357 1 vmsppl 360 213 0 197 2 0 2 2 0 8 0 pdppl 4096 436 0 394 6 0 6 6 0 8 0 pvpl 32 82165 0 78886 33 4 29 29 0 265 1 pmappl 224 213 0 197 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 252 0 4 8 0 8 8 0 8 0 ddb{1}>