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 62275 65835 0 0 0 1 syz-executor1282 *396293 38495 0 0 0x4000000 0K syz-executor1282 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(ffffffff81f7dcd5,ffffffff81f30eae,36f,ffffffff81f8a767) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b04968,ffff800020bb55a8) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bb55a8) at namei+0x88b sys/kern/vfs_lookup.c:232 domknodat(ffff800020b04968,ffffff9c,20000040,40,6) at domknodat+0xa1 sys/kern/vfs_syscalls.c:1405 syscall(ffff800020bb5870) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bb5870) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,88edf90d0c8,0,88edf90d0a8,88edf90d0a0) at Xsyscall+0x128 end of kernel end trace frame: 0x891b9529240, 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(ffffffff81f7dcd5,ffffffff81f30eae,36f,ffffffff81f8a767) at __assert+0x2e sys/kern/subr_prf.c:155 unveil_check_final(ffff800020b04968,ffff800020bb55a8) at unveil_check_final+0x81d sys/kern/kern_unveil.c:879 namei(ffff800020bb55a8) at namei+0x88b sys/kern/vfs_lookup.c:232 domknodat(ffff800020b04968,ffffff9c,20000040,40,6) at domknodat+0xa1 sys/kern/vfs_syscalls.c:1405 syscall(ffff800020bb5870) at syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline] syscall(ffff800020bb5870) at syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574 Xsyscall(6,0,88edf90d0c8,0,88edf90d0a8,88edf90d0a0) at Xsyscall+0x128 end of kernel end trace frame: 0x891b9529240, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020bb5340 rbx 0xffff800020bb53f0 rdx 0xffffffff81f1fdc9 cmd0646_9_tim_udma+0x134a6 rcx 0x201 rax 0x1 r8 0xffffffff814ea2c3 kprintf+0x183 r9 0x1 r10 0x81f81447976e87a7 r11 0xf45e6826a183e10b r12 0x3000000008 r13 0xffff800020bb5350 r14 0x100 r15 0x1 rip 0xffffffff81c97598 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020bb5330 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor1282) pid=396293 stat=onproc flags process=0 proc=4000000 pri=51, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020b04bc0,0xffff800020b04018 process=0xffff800020b2a358 user=0xffff800020bb0000, vmspace=0xfffffd806e9225a8 estcpu=5, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 65835 62275 75214 0 7 0 syz-executor1282 65835 357371 75214 0 2 0x4000000 syz-executor1282 65835 84579 75214 0 2 0x4000000 syz-executor1282 38495 455434 78661 0 3 0x80 nanosleep syz-executor1282 *38495 396293 78661 0 7 0x4000000 syz-executor1282 38495 349629 78661 0 3 0x4000080 fsleep syz-executor1282 78661 308599 41186 0 3 0x80 nanosleep syz-executor1282 75214 179006 41186 0 3 0x80 nanosleep syz-executor1282 41186 390250 84587 0 3 0x82 nanosleep syz-executor1282 84587 116686 94177 0 3 0x10008a pause ksh 94177 127876 39613 0 3 0x92 select sshd 32734 424397 1 0 3 0x100083 ttyin getty 39613 257161 1 0 3 0x80 select sshd 26218 91803 29485 73 3 0x100090 kqread syslogd 29485 484926 1 0 3 0x100082 netio syslogd 6109 338210 1 77 3 0x100090 poll dhclient 67419 493891 1 0 3 0x80 poll dhclient 34809 400966 0 0 2 0x14200 zerothread 72890 523160 0 0 3 0x14200 aiodoned aiodoned 3809 307713 0 0 3 0x14200 syncer update 46350 222593 0 0 3 0x14200 cleaner cleaner 69328 403135 0 0 3 0x14200 reaper reaper 51897 162433 0 0 3 0x14200 pgdaemon pagedaemon 4876 451511 0 0 3 0x14200 bored crynlk 71672 323924 0 0 3 0x14200 bored crypto 21083 424050 0 0 3 0x40014200 acpi0 acpi0 84688 125558 0 0 3 0x40014200 idle1 48588 123885 0 0 3 0x14200 bored softnet 56949 445548 0 0 3 0x14200 bored systqmp 14915 404786 0 0 3 0x14200 bored systq 78664 286146 0 0 3 0x40014200 bored softclock 7595 345970 0 0 3 0x40014200 idle0 45164 473824 0 0 3 0x14200 bored smr 1 151569 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 38495 (syz-executor1282) thread 0xffff800020b04968 (396293) exclusive rrwlock inode r = 0 (0xfffffd806ee0e3d8) 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 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 (0xffffffff82350b68) 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 9442 6315K 6316K 78643K 10529 0 0 pcb 23 9K 9K 78643K 55 0 0 rtable 61 2K 2K 78643K 115 0 0 ifaddr 21 7K 7K 78643K 21 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 2K 78643K 13 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1166 73K 73K 78643K 1171 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 43 50K 58K 78643K 227 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 152 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 55 3K 3K 78643K 681 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 3 0K 0K 78643K 3 0 0 temp 30 2359K 2423K 78643K 1719 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 22 0 16 1 0 1 1 0 8 0 plimitpl 152 13 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 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 96 0 0 6 0 6 6 0 8 0 art_table 32 97 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 1381 0 16 45 0 45 45 0 8 0 ffsino 272 1381 0 16 91 0 91 91 0 8 0 nchpl 144 1555 0 30 57 0 57 57 0 8 0 uvmvnodes 72 1390 0 0 26 0 26 26 0 8 0 vnodes 200 1390 0 0 74 0 74 74 0 8 0 namei 1024 3293 0 3292 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 2379 0 2379 8 3 5 6 0 8 5 sigapl 432 184 0 170 2 0 2 2 0 8 0 futexpl 56 8 0 7 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 112 118 0 111 2 1 1 1 0 8 0 fdescpl 488 185 0 170 2 0 2 2 0 8 0 filepl 152 817 0 775 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 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 96 47 0 40 1 0 1 1 0 8 0 zombiepl 144 170 0 170 2 1 1 1 0 8 1 processpl 840 200 0 170 4 0 4 4 0 8 0 procpl 600 208 0 174 3 0 3 3 0 8 0 sockpl 384 64 0 48 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 86 0 0 6 0 6 6 0 8 0 bufpl 256 2063 0 254 114 0 114 114 0 8 0 anonpl 16 17459 0 16250 6 1 5 6 0 125 0 amapchunkpl 152 515 0 472 2 0 2 2 0 158 0 amappl16 192 39 0 37 1 0 1 1 0 8 0 amappl15 184 44 0 40 1 0 1 1 0 8 0 amappl14 176 14 0 13 2 1 1 1 0 8 0 amappl13 168 22 0 19 1 0 1 1 0 8 0 amappl12 160 8 0 8 1 0 1 1 0 8 1 amappl11 152 21 0 10 1 0 1 1 0 8 0 amappl10 144 45 0 45 2 1 1 1 0 8 1 amappl9 136 380 0 379 1 0 1 1 0 8 0 amappl8 128 93 0 84 1 0 1 1 0 8 0 amappl7 120 14 0 13 1 0 1 1 0 8 0 amappl6 112 42 0 38 1 0 1 1 0 8 0 amappl5 104 130 0 120 1 0 1 1 0 8 0 amappl4 96 360 0 340 1 0 1 1 0 8 0 amappl3 88 105 0 99 1 0 1 1 0 8 0 amappl2 80 622 0 569 2 0 2 2 0 8 0 amappl1 72 11777 0 11340 15 5 10 15 0 8 0 amappl 72 385 0 360 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 24 185 0 170 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 185 0 170 1 0 1 1 0 8 0 vmmpekpl 168 5276 0 5257 1 0 1 1 0 8 0 vmmpepl 168 24200 0 23334 54 16 38 43 0 357 0 vmsppl 360 184 0 170 2 0 2 2 0 8 0 pdppl 4096 378 0 340 5 0 5 5 0 8 0 pvpl 32 72778 0 69758 31 4 27 27 0 265 2 pmappl 224 184 0 170 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 241 0 3 7 0 7 7 0 8 0 ddb{0}>