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 285682 16203 0 0x14000 0x200 0 reaper *432824 88794 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(fffffd807546c0d8,1,fffffd807f7bf960,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8068bf81e0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8068bf81e0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8068bf81e0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8068bf81e0,0) 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(fffffd807546c0d8,1,fffffd807f7bf960,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8068bf81e0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8068bf81e0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8068bf81e0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8068bf81e0,0) 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 0xffff800020a2d800 rbx 0xffff800020a2d8b0 rdx 0xffff800020a18c30 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0x60113e5c49d5ea37 r12 0x3000000008 r13 0xffff800020a2d810 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d7f0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=432824 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020a18ea0,0xffff800020a189d0 process=0xffff800020a1a3d8 user=0xffff800020a28000, vmspace=0xffffffff82648778 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 38810 162847 6248 0 3 0x82 nanosleep syz-executor.0 29315 53134 0 0 3 0x14200 bored sosplice 91062 340196 6248 0 3 0x82 nanosleep syz-executor.1 6248 519797 97169 0 3 0x82 thrsleep syz-fuzzer 6248 524052 97169 0 3 0x4000082 thrsleep syz-fuzzer 6248 465104 97169 0 3 0x4000082 thrsleep syz-fuzzer 6248 260030 97169 0 3 0x4000082 thrsleep syz-fuzzer 6248 125736 97169 0 3 0x4000082 thrsleep syz-fuzzer 6248 157730 97169 0 3 0x4000082 thrsleep syz-fuzzer 6248 69744 97169 0 3 0x4000082 thrsleep syz-fuzzer 6248 44160 97169 0 3 0x4000082 kqread syz-fuzzer 6248 427610 97169 0 3 0x4000082 thrsleep syz-fuzzer 6248 262636 97169 0 3 0x4000082 thrsleep syz-fuzzer 97169 175155 32744 0 3 0x10008a pause ksh 32744 117423 75422 0 3 0x92 select sshd 77966 361319 1 0 3 0x100083 ttyin getty 75422 120221 1 0 3 0x80 select sshd 70167 315040 23757 74 3 0x100092 bpf pflogd 23757 35412 1 0 3 0x80 netio pflogd 6236 144049 67750 73 3 0x100090 kqread syslogd 67750 164274 1 0 3 0x100082 netio syslogd 91178 421639 1 77 3 0x100090 poll dhclient 40684 444764 1 0 3 0x80 poll dhclient 24823 226345 0 0 3 0x14200 bored smr 64182 245786 0 0 3 0x14200 pgzero zerothread 26513 492581 0 0 3 0x14200 aiodoned aiodoned 90810 404564 0 0 3 0x14200 syncer update 23602 253412 0 0 3 0x14200 cleaner cleaner 16203 285682 0 0 7 0x14200 reaper 24777 492588 0 0 3 0x14200 pgdaemon pagedaemon 76687 484052 0 0 3 0x14200 bored crynlk 86188 102988 0 0 3 0x14200 bored crypto 46452 473539 0 0 3 0x40014200 acpi0 acpi0 75253 514792 0 0 3 0x40014200 idle1 51485 69884 0 0 3 0x14200 bored softnet 33234 284124 0 0 3 0x14200 bored systqmp *88794 432824 0 0 7 0x14200 systq 72159 72452 0 0 3 0x40014200 bored softclock 5177 1383 0 0 3 0x40014200 idle0 1 416156 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 88794 (systq) thread 0xffff800020a18c30 (432824) exclusive rrwlock inode r = 0 (0xfffffd80658f8e68) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9531 6439K 7510K 78643K 15776 0 pcb 13 8K 8K 78643K 337 0 rtable 112 4K 5K 78643K 907 0 ifaddr 117 25K 27K 78643K 491 0 counters 45 34K 34K 78643K 181 0 ioctlops 0 0K 4K 78643K 1545 0 iov 0 0K 24K 78643K 134 0 mount 1 1K 1K 78643K 1 0 vnodes 1228 77K 78K 78643K 2844 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 36 0 VM map 2 1K 1K 78643K 2 0 sem 10 1K 1K 78643K 17 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 3623 0 sigio 0 0K 0K 78643K 48 0 proc 63 63K 83K 78643K 726 0 subproc 32 2K 2K 78643K 85 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 295 0 in_multi 198 7K 7K 78643K 495 0 ether_multi 1 0K 0K 78643K 97 0 mrt 0 0K 0K 78643K 25 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 358 0 pfkey data 0 0K 4K 78643K 9 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 150 250K 250K 78643K 9465 0 UVM aobj 51 2K 3K 78643K 56 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 340 0 NDP 14 0K 0K 78643K 94 0 temp 129 3047K 3113K 78643K 30701 0 kqueue 3 4K 18K 78643K 317 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 17 0 13 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 120 0 118 1 0 1 1 0 8 0 rtentry 112 120 0 77 2 0 2 2 0 8 0 unpcb 120 828 0 812 1 0 1 1 0 8 0 syncache 264 57 0 57 5 4 1 1 0 8 1 tcpqe 32 75 0 75 4 3 1 1 0 8 1 tcpcb 544 1037 0 1027 3 1 2 2 0 8 1 inpcb 280 2708 0 2695 6 4 2 2 0 8 0 rttmr 72 9 0 9 3 3 0 1 0 8 0 nd6 48 21 0 14 1 0 1 1 0 8 0 pkpcb 40 49 0 49 4 4 0 1 0 8 0 ppxss 1128 4 0 4 1 1 0 1 0 8 0 pffrag 232 10 0 10 2 1 1 1 0 482 1 pffrnode 88 10 0 10 2 1 1 1 0 8 1 pffrent 40 245 0 245 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 24 109 0 84 1 0 1 1 0 8 0 pfstkey 112 109 0 84 3 1 2 2 0 8 0 pfstate 328 109 0 84 5 1 4 4 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 451 0 242 14 0 14 14 0 8 0 art_table 32 453 0 242 2 0 2 2 0 8 0 art_node 16 119 0 79 1 0 1 1 0 8 0 sysvmsgpl 40 27 0 14 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 54 0 5 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 6313 0 4905 46 0 46 46 0 8 0 ffsino 272 6313 0 4905 97 2 95 95 0 8 0 nchpl 144 10602 0 8995 61 1 60 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 27671 0 27671 1 0 1 1 0 8 1 percpumem 16 101 0 68 1 0 1 1 0 8 0 vcpupl 1984 20 0 0 3 0 3 3 0 8 0 vmpool 560 20 0 0 2 0 2 2 0 8 0 scsiplug 64 7 0 7 1 1 0 1 0 8 0 scxspl 192 31664 0 31664 8 7 1 7 0 8 1 plimitpl 152 217 0 209 1 0 1 1 0 8 0 sigapl 424 3835 0 3803 4 0 4 4 0 8 0 futexpl 56 24291 0 24291 1 0 1 1 0 8 1 knotepl 112 431 0 412 1 0 1 1 0 8 0 kqueuepl 144 532 0 530 1 0 1 1 0 8 0 pipelkpl 48 195 0 185 1 0 1 1 0 8 0 pipepl 120 390 0 371 1 0 1 1 0 8 0 fdescpl 496 3814 0 3798 3 0 3 3 0 8 0 filepl 152 13868 0 13763 8 3 5 6 0 8 0 lockfpl 104 479 0 478 1 0 1 1 0 8 0 lockfspl 48 188 0 187 1 0 1 1 0 8 0 sessionpl 112 21 0 10 1 0 1 1 0 8 0 pgrppl 48 21 0 10 1 0 1 1 0 8 0 ucredpl 96 2201 0 2188 1 0 1 1 0 8 0 zombiepl 144 3804 0 3802 1 0 1 1 0 8 0 processpl 984 3835 0 3802 5 0 5 5 0 8 0 procpl 624 8405 0 8362 4 0 4 4 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 60 0 58 4 3 1 1 0 8 0 sockpl 400 3710 0 3679 14 10 4 6 0 8 0 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 10 0 0 1 0 1 1 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 14 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 184 0 0 18 1 17 18 0 8 0 mtagpl 80 248 0 0 5 0 5 5 0 8 0 mbufpl 256 810 0 0 50 0 50 50 0 8 0 bufpl 280 8961 0 2694 448 0 448 448 0 8 0 anonpl 16 303476 0 294879 80 39 41 61 0 124 0 amapchunkpl 152 14545 0 14408 11 5 6 7 0 158 0 amappl16 192 19543 0 19106 68 46 22 43 0 8 0 amappl15 184 9 0 7 1 0 1 1 0 8 0 amappl14 176 3 0 3 2 2 0 1 0 8 0 amappl13 168 51 0 50 1 0 1 1 0 8 0 amappl12 160 814 0 813 2 1 1 1 0 8 0 amappl11 152 368 0 350 1 0 1 1 0 8 0 amappl10 144 303 0 297 1 0 1 1 0 8 0 amappl9 136 2154 0 2147 1 0 1 1 0 8 0 amappl8 128 2117 0 2099 1 0 1 1 0 8 0 amappl7 120 431 0 417 1 0 1 1 0 8 0 amappl6 112 314 0 310 1 0 1 1 0 8 0 amappl5 104 3689 0 3673 1 0 1 1 0 8 0 amappl4 96 544 0 514 2 1 1 2 0 8 0 amappl3 88 151 0 143 1 0 1 1 0 8 0 amappl2 80 30155 0 30075 3 1 2 3 0 8 0 amappl1 72 74039 0 73573 25 15 10 20 0 8 0 amappl 80 8749 0 8681 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 55 0 5 1 0 1 1 0 8 0 uaddrrnd 24 3834 0 3797 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3834 0 3797 1 0 1 1 0 8 0 vmmpekpl 168 21092 0 21052 3 0 3 3 0 8 0 vmmpepl 168 439694 0 437955 136 59 77 92 0 357 1 vmsppl 368 3833 0 3797 4 0 4 4 0 8 0 pdppl 4096 7676 0 7614 8 0 8 8 0 8 0 pvpl 32 929979 0 918182 189 87 102 148 0 265 1 pmappl 232 3833 0 3797 4 1 3 3 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 229 0 17 7 0 7 7 0 8 0