login: panic: kernel diagnostic assertion "p == curproc" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/vfs_vops.c", line 169 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 248917 34785 0 0x14000 0x200 1 reaper *248599 25948 0 0x14000 0x200 0K systq db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821efc13) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82249f12,ffffffff822695b4,a9,ffffffff8222b23a) at __assert+0x2b sys/kern/subr_prf.c:154 VOP_CLOSE(fffffd806f21b760,1,fffffd807f7bfc60,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8070ffba18,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8070ffba18,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8070ffba18,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8070ffba18,0) at closef+0x11c sys/kern/kern_descrip.c:1260 unp_gc(0) at unp_gc+0x172 sys/kern/uipc_usrreq.c:944 taskq_thread(ffffffff8251f4f0) at taskq_thread+0x9c sys/kern/kern_task.c:369 end trace frame: 0x0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel diagnostic assertion "p == curproc" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/vfs_vops.c", line 169 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821efc13) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82249f12,ffffffff822695b4,a9,ffffffff8222b23a) at __assert+0x2b sys/kern/subr_prf.c:154 VOP_CLOSE(fffffd806f21b760,1,fffffd807f7bfc60,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8070ffba18,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8070ffba18,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8070ffba18,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8070ffba18,0) at closef+0x11c sys/kern/kern_descrip.c:1260 unp_gc(0) at unp_gc+0x172 sys/kern/uipc_usrreq.c:944 taskq_thread(ffffffff8251f4f0) at taskq_thread+0x9c sys/kern/kern_task.c:369 end trace frame: 0x0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020a2d4b0 rbx 0xffff800020a2d560 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff810939af kprintf+0x16f r9 0x1 r10 0xdd85003a929adf08 r11 0x88e97f6c4ff34f0 r12 0x3000000008 r13 0xffff800020a2d4c0 r14 0x100 r15 0x1 rip 0xffffffff81146c58 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d4a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=248599 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19380,0xffff800020a18eb0 process=0xffff800020a1a3d8 user=0xffff800020a28000, vmspace=0xffffffff8266bc88 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 3653 408801 73578 0 3 0x82 nanosleep syz-executor2256 73578 143601 18192 0 3 0x10008a pause ksh 18192 389791 17759 0 3 0x92 select sshd 15854 177370 1 0 3 0x100083 ttyin getty 17759 140788 1 0 3 0x80 select sshd 78536 289493 91039 73 3 0x100090 kqread syslogd 91039 6034 1 0 3 0x100082 netio syslogd 27688 95189 1 77 3 0x100090 poll dhclient 85526 117305 1 0 3 0x80 poll dhclient 17775 434653 0 0 3 0x14200 bored smr 32282 274022 0 0 3 0x14200 pgzero zerothread 15552 332751 0 0 3 0x14200 aiodoned aiodoned 40877 139992 0 0 3 0x14200 syncer update 30751 441465 0 0 3 0x14200 cleaner cleaner 34785 248917 0 0 7 0x14200 reaper 7852 180542 0 0 3 0x14200 pgdaemon pagedaemon 22981 488131 0 0 3 0x14200 bored crynlk 65125 385126 0 0 3 0x14200 bored crypto 3661 406376 0 0 3 0x40014200 acpi0 acpi0 83135 245926 0 0 3 0x40014200 idle1 76229 183379 0 0 3 0x14200 bored softnet 74575 322298 0 0 3 0x14200 bored systqmp *25948 248599 0 0 7 0x14200 systq 79632 469649 0 0 2 0x40014200 softclock 21513 159318 0 0 3 0x40014200 idle0 1 342969 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 25948 (systq) thread 0xffff800020a19110 (248599) exclusive rrwlock inode r = 0 (0xfffffd806f223818) #0 witness_lock+0x4c5 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:613 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vn_closefile+0xc6 vn_close sys/kern/vfs_vnops.c:298 [inline] #5 vn_closefile+0xc6 sys/kern/vfs_vnops.c:614 #6 fdrop+0xc2 sys/kern/kern_descrip.c:1276 #7 closef+0x11c sys/kern/kern_descrip.c:1260 #8 unp_gc+0x172 sys/kern/uipc_usrreq.c:944 #9 taskq_thread+0x9c sys/kern/kern_task.c:369 #10 proc_trampoline+0x1c shared rwlock systq r = 0 (0xffffffff8251f550) #0 witness_lock+0x4c5 sys/kern/subr_witness.c:1164 #1 taskq_thread+0x8f sys/kern/kern_task.c:368 #2 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8263a520) #0 witness_lock+0x4c5 sys/kern/subr_witness.c:1164 #1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 #2 mi_switch+0x392 sys/kern/sched_bsd.c:435 #3 sleep_finish+0x113 sys/kern/kern_synch.c:417 #4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:446 [inline] #4 sleep_finish_all+0x32 sys/kern/kern_synch.c:206 #5 msleep+0x20e sys/kern/kern_synch.c:273 #6 taskq_next_work+0xbe sys/kern/kern_task.c:323 #7 taskq_thread+0xe5 sys/kern/kern_task.c:366 #8 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9455 6326K 6327K 78643K 10546 0 pcb 13 8K 8K 78643K 13 0 rtable 61 2K 2K 78643K 117 0 ifaddr 24 7K 7K 78643K 24 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 2K 78643K 13 0 mount 1 1K 1K 78643K 1 0 vnodes 1182 74K 74K 78643K 1187 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 1 0K 0K 78643K 1 0 proc 47 50K 58K 78643K 278 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 1K 78643K 151 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 54 2K 3K 78643K 805 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 3 0K 0K 78643K 3 0 temp 135 3047K 3097K 78643K 1535 0 kqueue 2 2K 2K 78643K 2 0 SYN cache 2 16K 16K 78643K 2 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 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 15 0 13 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 120 263 0 21 8 0 8 8 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 inpcb 280 22 0 16 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 1391 0 15 45 0 45 45 0 8 0 ffsino 272 1391 0 15 92 0 92 92 0 8 0 nchpl 144 1566 0 31 57 0 57 57 0 8 0 uvmvnodes 72 1400 0 0 26 0 26 26 0 8 0 vnodes 208 1400 0 0 74 0 74 74 0 8 0 namei 1024 3565 0 3565 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 2642 0 2642 2 1 1 2 0 8 1 plimitpl 152 13 0 8 1 0 1 1 0 8 0 sigapl 424 310 0 284 4 0 4 4 0 8 0 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 144 1 0 0 1 0 1 1 0 8 0 pipelkpl 48 57 0 53 1 0 1 1 0 8 0 pipepl 120 114 0 107 1 0 1 1 0 8 0 fdescpl 496 295 0 284 2 0 2 2 0 8 0 filepl 152 1177 0 783 16 0 16 16 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 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 144 284 0 283 1 0 1 1 0 8 0 processpl 984 310 0 283 4 0 4 4 0 8 0 procpl 624 310 0 283 3 0 3 3 0 8 0 sockpl 400 300 0 50 26 0 26 26 0 8 1 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 56 0 0 7 0 7 7 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 297 0 0 19 0 19 19 0 8 0 bufpl 280 1762 0 70 121 0 121 121 0 8 0 anonpl 16 18039 0 16914 6 1 5 6 0 124 0 amapchunkpl 152 584 0 547 2 0 2 2 0 158 0 amappl16 192 188 0 184 1 0 1 1 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 1 0 1 1 1 0 1 0 8 0 amappl13 168 12 0 11 1 0 1 1 0 8 0 amappl12 160 8 0 8 1 1 0 1 0 8 0 amappl11 152 64 0 52 1 0 1 1 0 8 0 amappl10 144 5 0 2 1 0 1 1 0 8 0 amappl9 136 227 0 226 1 0 1 1 0 8 0 amappl8 128 200 0 199 1 0 1 1 0 8 0 amappl7 120 78 0 70 1 0 1 1 0 8 0 amappl6 112 8 0 8 2 2 0 1 0 8 0 amappl5 104 244 0 233 1 0 1 1 0 8 0 amappl4 96 420 0 394 1 0 1 1 0 8 0 amappl3 88 98 0 92 1 0 1 1 0 8 0 amappl2 80 704 0 658 2 0 2 2 0 8 0 amappl1 72 12575 0 12189 14 4 10 14 0 8 0 amappl 80 472 0 452 1 0 1 1 0 84 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 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 64 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 295 0 283 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 295 0 283 1 0 1 1 0 8 0 vmmpekpl 168 5354 0 5334 1 0 1 1 0 8 0 vmmpepl 168 27285 0 26535 44 8 36 44 0 357 2 vmsppl 368 294 0 283 2 0 2 2 0 8 0 pdppl 4096 598 0 566 5 0 5 5 0 8 0 pvpl 32 73335 0 70599 26 0 26 26 0 265 3 pmappl 232 294 0 283 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 169 0 2 5 0 5 5 0 8 0 ddb{0}>