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 14259 35620 0 0x14000 0x200 1 reaper *462873 88285 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(fffffd8063dc7690,1,fffffd807f7bf780,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80681dbd28,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80681dbd28,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80681dbd28,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80681dbd28,0) 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(fffffd8063dc7690,1,fffffd807f7bf780,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80681dbd28,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80681dbd28,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80681dbd28,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80681dbd28,0) 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 0xffff800020a2cd40 rbx 0xffff800020a2cdf0 rdx 0xffff800020a19380 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0x73d8d9479a22daa0 r12 0x3000000008 r13 0xffff800020a2cd50 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2cd30 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=462873 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=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 17544 332881 80564 0 2 0x480 syz-executor.1 17544 175176 80564 0 3 0x4000080 piperd syz-executor.1 17544 262017 80564 0 3 0x4000080 fsleep syz-executor.1 60022 408412 0 0 3 0x14200 bored sosplice 80564 441906 64411 0 2 0x482 syz-executor.1 21307 324141 64411 0 2 0x482 syz-executor.0 64411 268755 86328 0 3 0x82 thrsleep syz-fuzzer 64411 327834 86328 0 3 0x4000082 thrsleep syz-fuzzer 64411 262634 86328 0 3 0x4000082 thrsleep syz-fuzzer 64411 454487 86328 0 3 0x4000082 thrsleep syz-fuzzer 64411 483959 86328 0 3 0x4000082 thrsleep syz-fuzzer 64411 351667 86328 0 3 0x4000082 thrsleep syz-fuzzer 64411 428264 86328 0 3 0x4000082 thrsleep syz-fuzzer 64411 12409 86328 0 3 0x4000082 kqread syz-fuzzer 64411 378640 86328 0 3 0x4000082 thrsleep syz-fuzzer 64411 7637 86328 0 3 0x4000082 thrsleep syz-fuzzer 86328 361373 73550 0 3 0x10008a pause ksh 73550 7038 63850 0 3 0x92 select sshd 31716 358536 1 0 3 0x100083 ttyin getty 63850 518077 1 0 3 0x80 select sshd 90233 436006 44314 74 3 0x100092 bpf pflogd 44314 412474 1 0 3 0x80 netio pflogd 41201 31032 73145 73 3 0x100090 kqread syslogd 73145 63678 1 0 3 0x100082 netio syslogd 68910 335255 1 77 3 0x100090 poll dhclient 25609 458163 1 0 3 0x80 poll dhclient 95359 184164 0 0 3 0x14200 bored smr 61343 263494 0 0 2 0x14200 zerothread 22965 26320 0 0 3 0x14200 aiodoned aiodoned 14059 451201 0 0 3 0x14200 syncer update 85564 507666 0 0 3 0x14200 cleaner cleaner 35620 14259 0 0 7 0x14200 reaper 8498 43115 0 0 3 0x14200 pgdaemon pagedaemon 1732 497176 0 0 3 0x14200 bored crynlk 75655 234198 0 0 3 0x14200 bored crypto 16233 488234 0 0 3 0x40014200 acpi0 acpi0 2312 166004 0 0 3 0x40014200 idle1 37065 170934 0 0 3 0x14200 bored softnet 7862 231812 0 0 3 0x14200 bored systqmp *88285 462873 0 0 7 0x14200 systq 39324 218488 0 0 3 0x40014200 bored softclock 63228 305484 0 0 3 0x40014200 idle0 1 330689 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 88285 (systq) thread 0xffff800020a19380 (462873) exclusive rrwlock inode r = 0 (0xfffffd806b43cc48) #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 9506 6406K 6981K 78643K 10964 0 pcb 13 8K 8K 78643K 45 0 rtable 108 4K 4K 78643K 225 0 ifaddr 63 13K 13K 78643K 72 0 counters 43 33K 34K 78643K 45 0 ioctlops 0 0K 4K 78643K 1473 0 iov 1 12K 16K 78643K 26 0 mount 1 1K 1K 78643K 1 0 vnodes 1223 77K 77K 78643K 1335 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 0K 78643K 16 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 165 0 sigio 1 0K 0K 78643K 1 0 proc 61 63K 83K 78643K 450 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 14 0 in_multi 40 2K 2K 78643K 50 0 ether_multi 1 0K 0K 78643K 4 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 227 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 101 21K 37K 78643K 1455 0 UVM aobj 10 4K 4K 78643K 10 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 18 0 NDP 10 0K 0K 78643K 15 0 temp 90 3049K 3101K 78643K 3892 0 kqueue 3 4K 8K 78643K 9 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 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 21 0 19 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 103 0 93 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpcb 544 52 0 48 1 0 1 1 0 8 0 inpcb 280 359 0 351 2 0 2 2 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 pffrag 232 2 0 2 1 0 1 1 0 482 1 pffrnode 88 2 0 2 1 0 1 1 0 8 1 pffrent 40 8 0 8 1 0 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 22 0 0 1 0 1 1 0 8 0 pfstkey 112 22 0 0 1 0 1 1 0 8 0 pfstate 328 22 0 0 2 0 2 2 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 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 12 0 2 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1625 0 219 46 0 46 46 0 8 0 ffsino 272 1625 0 219 94 0 94 94 0 8 0 nchpl 144 2033 0 411 61 0 61 61 0 8 0 uvmvnodes 72 1755 0 0 32 0 32 32 0 8 0 vnodes 208 1755 0 0 93 0 93 93 0 8 0 namei 1024 5384 0 5384 1 0 1 1 0 8 1 percpumem 16 33 0 1 1 0 1 1 0 8 0 scxspl 192 6249 0 6249 6 1 5 5 0 8 5 plimitpl 152 30 0 22 1 0 1 1 0 8 0 sigapl 424 381 0 349 4 0 4 4 0 8 0 futexpl 56 2298 0 2297 1 0 1 1 0 8 0 knotepl 112 63 0 44 1 0 1 1 0 8 0 kqueuepl 144 14 0 12 1 0 1 1 0 8 0 pipelkpl 48 103 0 92 1 0 1 1 0 8 0 pipepl 120 206 0 185 1 0 1 1 0 8 0 fdescpl 496 365 0 349 3 0 3 3 0 8 0 filepl 152 2102 0 1996 5 0 5 5 0 8 0 lockfpl 104 44 0 42 1 0 1 1 0 8 0 lockfspl 48 18 0 16 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 96 188 0 179 1 0 1 1 0 8 0 zombiepl 144 349 0 348 1 0 1 1 0 8 0 processpl 984 381 0 348 5 0 5 5 0 8 0 procpl 624 699 0 655 4 0 4 4 0 8 0 sosppl 128 3 0 3 1 0 1 1 0 8 1 sockpl 400 485 0 465 4 0 4 4 0 8 1 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 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 165 0 0 20 0 20 20 0 8 0 mtagpl 80 23 0 0 1 0 1 1 0 8 0 mbufpl 256 159 0 0 10 0 10 10 0 8 0 bufpl 280 4439 0 178 305 0 305 305 0 8 0 anonpl 16 46103 0 31791 60 1 59 59 0 124 1 amapchunkpl 152 2700 0 2560 20 0 20 20 0 158 14 amappl16 192 1432 0 658 39 0 39 39 0 8 0 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 72 0 70 3 2 1 1 0 8 0 amappl13 168 25 0 24 1 0 1 1 0 8 0 amappl12 160 17 0 15 2 1 1 1 0 8 0 amappl11 152 138 0 117 2 1 1 2 0 8 0 amappl10 144 22 0 17 1 0 1 1 0 8 0 amappl9 136 399 0 395 1 0 1 1 0 8 0 amappl8 128 299 0 284 1 0 1 1 0 8 0 amappl7 120 118 0 108 1 0 1 1 0 8 0 amappl6 112 89 0 84 1 0 1 1 0 8 0 amappl5 104 269 0 252 1 0 1 1 0 8 0 amappl4 96 503 0 473 2 1 1 2 0 8 0 amappl3 88 182 0 176 1 0 1 1 0 8 0 amappl2 80 2031 0 1955 3 1 2 3 0 8 0 amappl1 72 18192 0 17718 25 14 11 20 0 8 1 amappl 80 954 0 906 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 365 0 348 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 365 0 348 1 0 1 1 0 8 0 vmmpekpl 168 6786 0 6757 2 0 2 2 0 8 0 vmmpepl 168 51291 0 49258 108 6 102 103 0 357 13 vmsppl 368 364 0 348 2 0 2 2 0 8 0 pdppl 4096 738 0 696 6 0 6 6 0 8 0 pvpl 32 159582 0 142017 148 0 148 148 0 265 6 pmappl 232 364 0 348 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 167 0 3 5 0 5 5 0 8 0