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 486644 28864 0 0x14000 0x200 1 reaper * 66978 85479 0 0x14000 0x200 0K 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(fffffd806412e9c0,1,fffffd807f7bf9c0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80675efd28,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80675efd28,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80675efd28,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80675efd28,0) 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel diagnostic assertion "p == curproc" failed: file "/syzkaller/managers/multicore/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(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(fffffd806412e9c0,1,fffffd807f7bf9c0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80675efd28,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80675efd28,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80675efd28,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80675efd28,0) 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{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020a2d670 rbx 0xffff800020a2d720 rdx 0xffff800020a18ea0 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0xef9b8250bb1138d7 r12 0x3000000008 r13 0xffff800020a2d680 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d660 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=66978 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19110,0xffff800020a184f0 process=0xffff800020a1a7b0 user=0xffff800020a28000, vmspace=0xffffffff82648778 estcpu=0, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 47211 365512 73146 0 2 0 syz-executor.1 47211 338839 73146 0 3 0x4000080 fsleep syz-executor.1 27602 411871 0 0 3 0x14200 bored sosplice 73146 468209 5924 0 2 0x482 syz-executor.1 26526 328977 5924 0 2 0x482 syz-executor.0 5924 323705 75885 0 3 0x82 thrsleep syz-fuzzer 5924 321604 75885 0 3 0x4000082 thrsleep syz-fuzzer 5924 42131 75885 0 3 0x4000082 thrsleep syz-fuzzer 5924 506938 75885 0 3 0x4000082 thrsleep syz-fuzzer 5924 288193 75885 0 3 0x4000082 thrsleep syz-fuzzer 5924 94745 75885 0 3 0x4000082 thrsleep syz-fuzzer 5924 474277 75885 0 3 0x4000082 thrsleep syz-fuzzer 5924 53506 75885 0 3 0x4000082 thrsleep syz-fuzzer 5924 391711 75885 0 3 0x4000082 kqread syz-fuzzer 5924 145915 75885 0 3 0x4000082 thrsleep syz-fuzzer 75885 109892 26882 0 3 0x10008a pause ksh 26882 166569 60534 0 3 0x92 select sshd 47420 63233 1 0 3 0x100083 ttyin getty 60534 116963 1 0 3 0x80 select sshd 33716 211685 10082 74 3 0x100092 bpf pflogd 10082 322212 1 0 3 0x80 netio pflogd 39555 66775 78071 73 3 0x100090 kqread syslogd 78071 198244 1 0 3 0x100082 netio syslogd 81698 166458 1 77 3 0x100090 poll dhclient 23735 130081 1 0 3 0x80 poll dhclient 41021 1673 0 0 3 0x14200 bored smr 55471 426716 0 0 2 0x14200 zerothread 73839 12766 0 0 3 0x14200 aiodoned aiodoned 72286 398487 0 0 3 0x14200 syncer update 19889 182651 0 0 3 0x14200 cleaner cleaner 28864 486644 0 0 7 0x14200 reaper 4880 240180 0 0 3 0x14200 pgdaemon pagedaemon 94921 273606 0 0 3 0x14200 bored crynlk 83576 246321 0 0 3 0x14200 bored crypto 99039 485309 0 0 3 0x40014200 acpi0 acpi0 32405 64444 0 0 3 0x40014200 idle1 54372 135507 0 0 3 0x14200 bored softnet 79537 421654 0 0 3 0x14200 bored systqmp *85479 66978 0 0 7 0x14200 systq 49088 209833 0 0 2 0x40014200 softclock 33807 342093 0 0 3 0x40014200 idle0 1 470261 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 85479 (systq) thread 0xffff800020a18ea0 (66978) exclusive rrwlock inode r = 0 (0xfffffd806e6932c8) #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 (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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9523 6422K 6814K 78643K 11061 0 pcb 15 8K 8K 78643K 97 0 rtable 108 12K 13K 78643K 337 0 ifaddr 74 14K 14K 78643K 105 0 counters 43 33K 34K 78643K 53 0 ioctlops 0 0K 4K 78643K 1482 0 iov 0 0K 16K 78643K 28 0 mount 1 1K 1K 78643K 1 0 vnodes 1224 77K 77K 78643K 1362 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 5 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 24 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 275 0 sigio 0 0K 0K 78643K 4 0 proc 61 63K 83K 78643K 454 0 subproc 32 2K 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 36 0 in_multi 37 2K 2K 78643K 83 0 ether_multi 1 0K 0K 78643K 11 0 mrt 1 0K 0K 78643K 8 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 225 0 pfkey data 0 0K 1K 78643K 2 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 116 54K 56K 78643K 1860 0 UVM aobj 14 2K 3K 78643K 17 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 57 0 NDP 13 0K 0K 78643K 25 0 temp 108 3039K 3103K 78643K 3063 0 kqueue 3 4K 8K 78643K 26 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 7 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 31 0 29 1 0 1 1 0 8 0 rtentry 112 69 0 28 2 0 2 2 0 8 0 unpcb 120 189 0 177 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 387 0 387 1 1 0 1 0 8 0 tcpcb 544 117 0 111 1 0 1 1 0 8 0 inpcb 280 411 0 398 3 1 2 2 0 8 0 rttmr 72 3 0 3 2 1 1 1 0 8 1 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 3 0 3 1 0 1 1 0 8 1 nd6 48 10 0 5 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 pffrag 232 5 0 5 2 1 1 1 0 482 1 pffrnode 88 5 0 5 2 1 1 1 0 8 1 pffrent 40 141 0 141 2 1 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 37 0 4 1 0 1 1 0 8 0 pfstkey 112 37 0 4 1 0 1 1 0 8 0 pfstate 328 37 0 4 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 5 0 2 3 0 3 3 0 8 0 art_heap4 256 340 0 140 13 0 13 13 0 8 0 art_table 32 345 0 142 2 0 2 2 0 8 0 art_node 16 68 0 30 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 18 0 8 1 0 1 1 0 8 0 shmpl 112 15 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1782 0 370 46 0 46 46 0 8 0 ffsino 272 1782 0 370 95 0 95 95 0 8 0 nchpl 144 2345 0 722 61 0 61 61 0 8 0 uvmvnodes 72 1923 0 0 35 0 35 35 0 8 0 vnodes 208 1923 0 0 102 0 102 102 0 8 0 namei 1024 6244 0 6244 1 0 1 1 0 8 1 percpumem 16 37 0 5 1 0 1 1 0 8 0 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 560 3 0 0 1 0 1 1 0 8 0 scxspl 192 6929 0 6929 8 6 2 7 0 8 2 plimitpl 152 31 0 23 1 0 1 1 0 8 0 sigapl 424 491 0 459 4 0 4 4 0 8 0 futexpl 56 4386 0 4385 1 0 1 1 0 8 0 knotepl 112 82 0 63 1 0 1 1 0 8 0 kqueuepl 144 116 0 114 1 0 1 1 0 8 0 pipelkpl 48 441 0 429 1 0 1 1 0 8 0 pipepl 120 882 0 859 2 0 2 2 0 8 1 fdescpl 496 475 0 459 4 1 3 3 0 8 0 filepl 152 3364 0 3249 5 0 5 5 0 8 0 lockfpl 104 44 0 43 1 0 1 1 0 8 0 lockfspl 48 17 0 16 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 274 0 264 1 0 1 1 0 8 0 zombiepl 144 459 0 458 1 0 1 1 0 8 0 processpl 984 491 0 458 5 0 5 5 0 8 0 procpl 624 1083 0 1040 4 0 4 4 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 4 0 4 1 0 1 1 0 8 1 sockpl 400 636 0 609 5 1 4 4 0 8 0 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 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 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 176 0 0 21 0 21 21 0 8 0 mtagpl 80 27 0 0 1 0 1 1 0 8 0 mbufpl 256 279 0 0 17 0 17 17 0 8 0 bufpl 280 4486 0 174 308 0 308 308 0 8 0 anonpl 16 61794 0 47736 75 2 73 74 0 124 12 amapchunkpl 152 3159 0 3019 19 0 19 19 0 158 12 amappl16 192 2416 0 1597 53 7 46 51 0 8 5 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 245 0 240 2 1 1 1 0 8 0 amappl13 168 26 0 25 1 0 1 1 0 8 0 amappl12 160 5 0 3 1 0 1 1 0 8 0 amappl11 152 72 0 54 1 0 1 1 0 8 0 amappl10 144 21 0 15 1 0 1 1 0 8 0 amappl9 136 409 0 404 1 0 1 1 0 8 0 amappl8 128 298 0 281 1 0 1 1 0 8 0 amappl7 120 121 0 108 1 0 1 1 0 8 0 amappl6 112 23 0 20 1 0 1 1 0 8 0 amappl5 104 371 0 354 1 0 1 1 0 8 0 amappl4 96 505 0 476 1 0 1 1 0 8 0 amappl3 88 361 0 354 1 0 1 1 0 8 0 amappl2 80 2879 0 2803 3 1 2 3 0 8 0 amappl1 72 20563 0 20096 26 17 9 20 0 8 0 amappl 80 1340 0 1292 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 16 0 3 1 0 1 1 0 8 0 uaddrrnd 24 478 0 458 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 478 0 458 1 0 1 1 0 8 0 vmmpekpl 168 9068 0 9033 2 0 2 2 0 8 0 vmmpepl 168 64979 0 62900 112 15 97 106 0 357 6 vmsppl 368 477 0 458 2 0 2 2 0 8 0 pdppl 4096 964 0 919 7 1 6 6 0 8 0 pvpl 32 191565 0 174263 179 3 176 177 0 265 29 pmappl 232 477 0 458 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 179 0 5 5 0 5 5 0 8 0