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 262906 39564 0 0x14000 0x200 0 reaper * 99308 39096 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(fffffd8068065ec0,1,fffffd807f7bf480,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8067c2c130,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8067c2c130,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8067c2c130,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8067c2c130,0) 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(fffffd8068065ec0,1,fffffd807f7bf480,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8067c2c130,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8067c2c130,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8067c2c130,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8067c2c130,0) 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 0xffff800020a2d950 rbx 0xffff800020a2da00 rdx 0xffff800020a19380 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0xed8a3ef410ad5974 r12 0x3000000008 r13 0xffff800020a2d960 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d940 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=99308 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020a195f0,0xffff800020a19120 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 66196 194131 0 0 3 0x14200 bored sosplice 16508 518163 34813 0 3 0x82 nanosleep syz-executor.1 51995 491942 34813 0 3 0x82 nanosleep syz-executor.0 34813 432000 39452 0 3 0x82 thrsleep syz-fuzzer 34813 192776 39452 0 3 0x4000082 thrsleep syz-fuzzer 34813 241370 39452 0 3 0x4000082 thrsleep syz-fuzzer 34813 212644 39452 0 3 0x4000082 thrsleep syz-fuzzer 34813 130288 39452 0 3 0x4000082 thrsleep syz-fuzzer 34813 486521 39452 0 3 0x4000082 thrsleep syz-fuzzer 34813 36132 39452 0 3 0x4000082 thrsleep syz-fuzzer 34813 49004 39452 0 3 0x4000082 thrsleep syz-fuzzer 34813 523133 39452 0 3 0x4000082 thrsleep syz-fuzzer 34813 508318 39452 0 3 0x4000082 kqread syz-fuzzer 39452 392482 8188 0 3 0x10008a pause ksh 8188 104768 40523 0 3 0x92 select sshd 65578 53869 1 0 3 0x100083 ttyin getty 40523 523860 1 0 3 0x80 select sshd 20323 477318 98918 74 3 0x100092 bpf pflogd 98918 163605 1 0 3 0x80 netio pflogd 66697 112840 26701 73 3 0x100090 kqread syslogd 26701 56880 1 0 3 0x100082 netio syslogd 28999 80947 1 77 3 0x100090 poll dhclient 35025 93734 1 0 3 0x80 poll dhclient 27226 457506 0 0 3 0x14200 bored smr 26807 305604 0 0 3 0x14200 pgzero zerothread 36982 474743 0 0 3 0x14200 aiodoned aiodoned 36732 435769 0 0 3 0x14200 syncer update 49259 94218 0 0 3 0x14200 cleaner cleaner 39564 262906 0 0 7 0x14200 reaper 24983 318070 0 0 3 0x14200 pgdaemon pagedaemon 46263 334541 0 0 3 0x14200 bored crynlk 20361 518284 0 0 3 0x14200 bored crypto 7265 174907 0 0 3 0x40014200 acpi0 acpi0 66111 401023 0 0 3 0x40014200 idle1 52862 229137 0 0 3 0x14200 bored softnet 19735 464164 0 0 3 0x14200 bored systqmp *39096 99308 0 0 7 0x14200 systq 9359 444243 0 0 3 0x40014200 bored softclock 12510 515604 0 0 3 0x40014200 idle0 1 497636 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 39096 (systq) thread 0xffff800020a19380 (99308) exclusive rrwlock inode r = 0 (0xfffffd806430e1b0) #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 9511 6413K 6603K 78643K 10772 0 pcb 13 8K 8K 78643K 55 0 rtable 113 4K 4K 78643K 291 0 ifaddr 67 13K 14K 78643K 94 0 counters 43 33K 34K 78643K 53 0 ioctlops 0 0K 4K 78643K 1484 0 iov 0 0K 12K 78643K 40 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1285 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 22 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 238 0 proc 62 63K 95K 78643K 470 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 30 0 in_multi 40 2K 2K 78643K 60 0 ether_multi 1 0K 0K 78643K 7 0 mrt 0 0K 0K 78643K 3 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 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 118 54K 55K 78643K 1751 0 UVM aobj 11 2K 2K 78643K 11 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 30 0 NDP 11 0K 0K 78643K 20 0 temp 95 3041K 3107K 78643K 9231 0 kqueue 3 4K 12K 78643K 21 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 7 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 70 0 67 1 0 1 1 0 8 0 rtentry 112 55 0 10 2 0 2 2 0 8 0 unpcb 120 91 0 79 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 88 0 82 1 0 1 1 0 8 0 inpcb 280 269 0 260 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrag 232 2 0 2 1 1 0 1 0 482 0 pffrnode 88 2 0 2 1 1 0 1 0 8 0 pffrent 40 4 0 4 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 31 0 7 1 0 1 1 0 8 0 pfstkey 112 31 0 7 1 0 1 1 0 8 0 pfstate 328 31 0 6 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 188 0 0 12 0 12 12 0 8 0 art_table 32 189 0 0 2 0 2 2 0 8 0 art_node 16 46 0 5 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 14 0 4 1 0 1 1 0 8 0 shmpl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1711 0 301 46 0 46 46 0 8 0 ffsino 272 1711 0 301 95 0 95 95 0 8 0 nchpl 144 2233 0 614 61 0 61 61 0 8 0 uvmvnodes 72 1788 0 0 33 0 33 33 0 8 0 vnodes 208 1788 0 0 95 0 95 95 0 8 0 namei 1024 6052 0 6052 1 0 1 1 0 8 1 percpumem 16 37 0 5 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 0 1 0 1 1 0 8 0 scxspl 192 7175 0 7175 8 5 3 5 0 8 3 plimitpl 152 29 0 21 1 0 1 1 0 8 0 sigapl 424 454 0 422 4 0 4 4 0 8 0 futexpl 56 2798 0 2798 1 0 1 1 0 8 1 knotepl 112 72 0 53 1 0 1 1 0 8 0 kqueuepl 144 42 0 40 1 0 1 1 0 8 0 pipelkpl 48 125 0 115 1 0 1 1 0 8 0 pipepl 120 250 0 231 2 1 1 2 0 8 0 fdescpl 496 438 0 422 3 0 3 3 0 8 0 filepl 152 2487 0 2379 6 1 5 6 0 8 0 lockfpl 104 467 0 466 1 0 1 1 0 8 0 lockfspl 48 70 0 69 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 22 0 11 1 0 1 1 0 8 0 ucredpl 96 184 0 173 1 0 1 1 0 8 0 zombiepl 144 423 0 421 1 0 1 1 0 8 0 processpl 984 454 0 421 5 0 5 5 0 8 0 procpl 624 986 0 944 5 0 5 5 0 8 1 sosppl 128 7 0 7 1 0 1 1 0 8 1 sockpl 400 433 0 411 4 1 3 4 0 8 0 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 158 0 0 19 0 19 19 0 8 0 mtagpl 80 4 0 0 1 0 1 1 0 8 0 mbufpl 256 173 0 0 11 0 11 11 0 8 0 bufpl 280 4807 0 173 331 0 331 331 0 8 0 anonpl 16 54829 0 40902 74 3 71 73 0 124 14 amapchunkpl 152 2256 0 2099 10 3 7 10 0 158 0 amappl16 192 2025 0 1276 50 6 44 50 0 8 6 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 10 0 8 2 1 1 1 0 8 0 amappl13 168 25 0 24 1 0 1 1 0 8 0 amappl12 160 97 0 95 2 1 1 1 0 8 0 amappl11 152 69 0 51 1 0 1 1 0 8 0 amappl10 144 17 0 13 1 0 1 1 0 8 0 amappl9 136 500 0 495 1 0 1 1 0 8 0 amappl8 128 413 0 396 1 0 1 1 0 8 0 amappl7 120 117 0 106 1 0 1 1 0 8 0 amappl6 112 24 0 18 1 0 1 1 0 8 0 amappl5 104 341 0 322 1 0 1 1 0 8 0 amappl4 96 503 0 472 2 1 1 2 0 8 0 amappl3 88 108 0 103 1 0 1 1 0 8 0 amappl2 80 2677 0 2599 3 1 2 3 0 8 0 amappl1 72 19473 0 18997 26 16 10 20 0 8 0 amappl 80 1239 0 1182 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 10 0 0 1 0 1 1 0 8 0 uaddrrnd 24 442 0 421 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 442 0 421 1 0 1 1 0 8 0 vmmpekpl 168 7414 0 7381 2 0 2 2 0 8 0 vmmpepl 168 60152 0 58121 108 13 95 101 0 357 6 vmsppl 368 441 0 421 2 0 2 2 0 8 0 pdppl 4096 892 0 846 6 0 6 6 0 8 0 pvpl 32 180697 0 163526 175 2 173 175 0 265 33 pmappl 232 441 0 421 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 167 0 4 5 0 5 5 0 8 0