panic: kernel diagnostic assertion "p == curproc" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/vfs_vops.c", line 169 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 40437 57498 0 0x14000 0x200 0 reaper * 71668 85866 0 0x14000 0x200 1K systq db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821f472c) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff8224a9ea,ffffffff8224bf14,a9,ffffffff8222a32f) at __assert+0x2b sys/kern/subr_prf.c:154 VOP_CLOSE(fffffd80718fcea8,1,fffffd807f7bf6c0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80664113b0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80664113b0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80664113b0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80664113b0,0) at closef+0x11c sys/kern/kern_descrip.c:1260 unp_gc(0) at unp_gc+0x172 sys/kern/uipc_usrreq.c:944 taskq_thread(ffffffff8248bfb0) 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel diagnostic assertion "p == curproc" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/vfs_vops.c", line 169 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821f472c) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff8224a9ea,ffffffff8224bf14,a9,ffffffff8222a32f) at __assert+0x2b sys/kern/subr_prf.c:154 VOP_CLOSE(fffffd80718fcea8,1,fffffd807f7bf6c0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80664113b0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80664113b0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80664113b0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80664113b0,0) at closef+0x11c sys/kern/kern_descrip.c:1260 unp_gc(0) at unp_gc+0x172 sys/kern/uipc_usrreq.c:944 taskq_thread(ffffffff8248bfb0) at taskq_thread+0x9c sys/kern/kern_task.c:369 end trace frame: 0x0, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020a2d480 rbx 0xffff800020a2d530 rdx 0xffff800020a18000 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0x55f39980f7d250f2 r12 0x3000000008 r13 0xffff800020a2d490 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d470 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=71668 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a18750,0xffff800020a18280 process=0xffff800020a1a000 user=0xffff800020a28000, vmspace=0xffffffff82648778 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 6692 440286 18524 0 3 0x82 nanosleep syz-executor.0 18524 447786 73841 0 3 0x82 thrsleep syz-fuzzer 18524 288652 73841 0 3 0x4000082 nanosleep syz-fuzzer 18524 409425 73841 0 3 0x4000082 thrsleep syz-fuzzer 18524 121364 73841 0 3 0x4000082 thrsleep syz-fuzzer 18524 278691 73841 0 3 0x4000082 nanosleep syz-fuzzer 18524 213575 73841 0 3 0x4000082 thrsleep syz-fuzzer 18524 411453 73841 0 3 0x4000082 thrsleep syz-fuzzer 18524 188361 73841 0 3 0x4000082 thrsleep syz-fuzzer 18524 426782 73841 0 3 0x4000082 thrsleep syz-fuzzer 18524 43276 73841 0 3 0x4000082 thrsleep syz-fuzzer 18524 185751 73841 0 3 0x4000082 kqread syz-fuzzer 73841 396715 14553 0 3 0x10008a pause ksh 14553 57216 27278 0 3 0x92 select sshd 89747 243216 1 0 3 0x100083 ttyin getty 27278 99921 1 0 3 0x80 select sshd 43657 403682 7410 74 3 0x100092 bpf pflogd 7410 449543 1 0 3 0x80 netio pflogd 78563 283170 4259 73 3 0x100090 kqread syslogd 4259 96599 1 0 3 0x100082 netio syslogd 16725 285209 1 77 3 0x100090 poll dhclient 17334 459219 1 0 3 0x80 poll dhclient 8243 348525 0 0 3 0x14200 bored smr 77490 2365 0 0 3 0x14200 pgzero zerothread 4105 282239 0 0 3 0x14200 aiodoned aiodoned 1234 426025 0 0 3 0x14200 syncer update 87432 397095 0 0 3 0x14200 cleaner cleaner 57498 40437 0 0 7 0x14200 reaper 31881 64027 0 0 3 0x14200 pgdaemon pagedaemon 88770 382818 0 0 3 0x14200 bored crynlk 3660 454012 0 0 3 0x14200 bored crypto 42965 518513 0 0 3 0x40014200 acpi0 acpi0 12355 204202 0 0 3 0x40014200 idle1 17817 364739 0 0 3 0x14200 bored softnet 45208 153724 0 0 3 0x14200 bored systqmp *85866 71668 0 0 7 0x14200 systq 5305 289221 0 0 3 0x40014200 bored softclock 43413 265648 0 0 3 0x40014200 idle0 1 357724 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 85866 (systq) thread 0xffff800020a18000 (71668) shared rwlock systq r = 0 (0xffffffff8248c010) #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 (0xffffffff8267f3f0) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9490 6466K 6659K 78643K 10638 0 pcb 13 8K 8K 78643K 17 0 rtable 94 3K 4K 78643K 208 0 ifaddr 47 10K 11K 78643K 55 0 counters 43 33K 34K 78643K 45 0 ioctlops 0 0K 4K 78643K 1472 0 iov 0 0K 12K 78643K 6 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1243 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 1K 1K 78643K 2 0 sem 4 0K 0K 78643K 4 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 4 9K 25K 78643K 67 0 proc 62 63K 95K 78643K 451 0 subproc 31 1K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 4 0 in_multi 23 1K 2K 78643K 33 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 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 207 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 105 37K 37K 78643K 1120 0 UVM aobj 4 4K 4K 78643K 4 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 7 0K 0K 78643K 12 0 temp 73 3036K 3100K 78643K 5855 0 kqueue 3 4K 6K 78643K 4 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 19 0 17 1 0 1 1 0 8 0 rtentry 112 45 0 8 2 0 2 2 0 8 0 unpcb 120 41 0 30 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 53 0 53 1 1 0 1 0 8 0 tcpcb 544 14 0 10 1 0 1 1 0 8 0 inpcb 280 49 0 42 1 0 1 1 0 8 0 nd6 48 6 0 3 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 1 0 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 12 0 5 1 0 1 1 0 8 0 pfstkey 112 12 0 5 1 0 1 1 0 8 0 pfstate 328 12 0 5 1 0 1 1 0 8 0 pfrule 1360 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 188 0 40 12 0 12 12 0 8 1 art_table 32 189 0 40 2 0 2 2 0 8 0 art_node 16 44 0 10 1 0 1 1 0 8 0 semapl 112 2 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1484 0 77 46 0 46 46 0 8 0 ffsino 272 1484 0 77 95 0 95 95 0 8 0 nchpl 144 1782 0 186 61 0 61 61 0 8 0 uvmvnodes 72 1540 0 0 28 0 28 28 0 8 0 vnodes 208 1540 0 0 82 0 82 82 0 8 0 namei 1024 4633 0 4633 2 1 1 1 0 8 1 percpumem 16 33 0 1 1 0 1 1 0 8 0 vcpupl 1984 1 0 0 1 0 1 1 0 8 0 vmpool 560 3 0 2 1 0 1 1 0 8 0 scxspl 192 5564 0 5564 10 9 1 7 0 8 1 plimitpl 152 15 0 7 1 0 1 1 0 8 0 sigapl 424 282 0 252 4 0 4 4 0 8 0 futexpl 56 474 0 474 2 1 1 1 0 8 1 knotepl 112 54 0 41 1 0 1 1 0 8 0 kqueuepl 144 10 0 8 1 0 1 1 0 8 0 pipelkpl 48 78 0 71 1 0 1 1 0 8 0 pipepl 120 156 0 143 1 0 1 1 0 8 0 fdescpl 496 267 0 252 3 0 3 3 0 8 0 filepl 152 1388 0 1289 5 0 5 5 0 8 0 lockfpl 104 15 0 14 1 0 1 1 0 8 0 lockfspl 48 6 0 5 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 135 0 126 1 0 1 1 0 8 0 zombiepl 144 253 0 251 1 0 1 1 0 8 0 processpl 984 282 0 251 5 0 5 5 0 8 0 procpl 624 367 0 326 4 0 4 4 0 8 0 sockpl 400 110 0 90 4 1 3 3 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 170 0 0 21 1 20 21 0 8 0 mtagpl 80 4 0 0 1 0 1 1 0 8 0 mbufpl 256 162 0 0 10 0 10 10 0 8 0 bufpl 280 4331 0 173 297 0 297 297 0 8 0 anonpl 16 38137 0 27506 55 1 54 54 0 124 0 amapchunkpl 152 1461 0 1310 10 4 6 10 0 158 0 amappl16 192 963 0 254 36 0 36 36 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 5 0 4 2 1 1 1 0 8 0 amappl13 168 37 0 35 1 0 1 1 0 8 0 amappl12 160 12 0 11 1 0 1 1 0 8 0 amappl11 152 96 0 76 1 0 1 1 0 8 0 amappl10 144 18 0 13 1 0 1 1 0 8 0 amappl9 136 392 0 389 1 0 1 1 0 8 0 amappl8 128 293 0 280 1 0 1 1 0 8 0 amappl7 120 120 0 108 1 0 1 1 0 8 0 amappl6 112 46 0 42 1 0 1 1 0 8 0 amappl5 104 133 0 118 1 0 1 1 0 8 0 amappl4 96 539 0 504 2 1 1 2 0 8 0 amappl3 88 119 0 110 1 0 1 1 0 8 0 amappl2 80 1214 0 1136 3 1 2 3 0 8 0 amappl1 72 16238 0 15778 25 15 10 20 0 8 0 amappl 80 619 0 571 2 0 2 2 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 270 0 253 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 270 0 253 1 0 1 1 0 8 0 vmmpekpl 168 5985 0 5953 2 0 2 2 0 8 0 vmmpepl 168 39612 0 37716 103 19 84 99 0 357 0 vmsppl 368 269 0 253 2 0 2 2 0 8 0 pdppl 4096 548 0 507 6 0 6 6 0 8 0 pvpl 32 138563 0 125071 141 6 135 138 0 265 3 pmappl 232 269 0 253 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 167 0 5 5 0 5 5 0 8 0