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 252056 95030 0 0x14000 0x200 0 reaper *420163 81274 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(fffffd806fdec5b8,81,fffffd807f7bf6c0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80646e9578,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80646e9578,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80646e9578,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80646e9578,0) 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(fffffd806fdec5b8,81,fffffd807f7bf6c0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80646e9578,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80646e9578,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80646e9578,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80646e9578,0) 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 0xffff800020a2d9f0 rbx 0xffff800020a2daa0 rdx 0xffff800020a18ea0 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0x96f02a7d49681735 r12 0x3000000008 r13 0xffff800020a2da00 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d9e0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=420163 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020a195f0,0xffff800020a189d0 process=0xffff800020a1ab88 user=0xffff800020a28000, vmspace=0xffffffff82648778 estcpu=1, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 72971 38827 96076 0 3 0x80 nanosleep syz-executor.1 72971 341620 96076 0 3 0x4000080 netio syz-executor.1 72971 161407 96076 0 3 0x4000080 fsleep syz-executor.1 26457 21355 45458 0 3 0x82 nanosleep syz-executor.0 55470 114487 0 0 3 0x14200 bored sosplice 96076 85641 45458 0 3 0x82 nanosleep syz-executor.1 45458 14679 67484 0 3 0x82 thrsleep syz-fuzzer 45458 298612 67484 0 3 0x4000082 thrsleep syz-fuzzer 45458 43070 67484 0 3 0x4000082 thrsleep syz-fuzzer 45458 101932 67484 0 3 0x4000082 thrsleep syz-fuzzer 45458 256665 67484 0 3 0x4000082 thrsleep syz-fuzzer 45458 252665 67484 0 3 0x4000082 thrsleep syz-fuzzer 45458 111872 67484 0 3 0x4000082 thrsleep syz-fuzzer 45458 521431 67484 0 3 0x4000082 thrsleep syz-fuzzer 45458 160482 67484 0 3 0x4000082 thrsleep syz-fuzzer 45458 519169 67484 0 3 0x4000082 kqread syz-fuzzer 67484 105109 35021 0 3 0x10008a pause ksh 35021 157657 6577 0 3 0x92 select sshd 3233 5635 1 0 3 0x100083 ttyin getty 6577 38169 1 0 3 0x80 select sshd 34429 268895 84142 74 3 0x100092 bpf pflogd 84142 152038 1 0 3 0x80 netio pflogd 84715 134038 42922 73 3 0x100090 kqread syslogd 42922 39975 1 0 3 0x100082 netio syslogd 60075 291166 1 77 3 0x100090 poll dhclient 82896 428747 1 0 3 0x80 poll dhclient 15851 489289 0 0 3 0x14200 bored smr 77982 144941 0 0 3 0x14200 pgzero zerothread 64599 275732 0 0 3 0x14200 aiodoned aiodoned 40330 248412 0 0 3 0x14200 syncer update 8479 111274 0 0 3 0x14200 cleaner cleaner 95030 252056 0 0 7 0x14200 reaper 51876 469825 0 0 3 0x14200 pgdaemon pagedaemon 45557 464861 0 0 3 0x14200 bored crynlk 54812 507705 0 0 3 0x14200 bored crypto 55414 418169 0 0 3 0x40014200 acpi0 acpi0 39238 387281 0 0 3 0x40014200 idle1 51296 514106 0 0 3 0x14200 bored softnet 28205 271667 0 0 3 0x14200 bored systqmp *81274 420163 0 0 7 0x14200 systq 82031 272718 0 0 3 0x40014200 bored softclock 54833 148177 0 0 3 0x40014200 idle0 1 408215 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 81274 (systq) thread 0xffff800020a18ea0 (420163) 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 9534 6491K 6811K 78643K 11176 0 pcb 14 8K 8K 78643K 1512 0 rtable 76 2K 3K 78643K 1493 0 ifaddr 84 16K 17K 78643K 141 0 counters 43 33K 34K 78643K 59 0 ioctlops 0 0K 4K 78643K 1501 0 iov 0 0K 16K 78643K 102 0 mount 1 1K 1K 78643K 1 0 vnodes 1217 77K 77K 78643K 1441 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 9 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 26 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 1190 0 sigio 0 0K 0K 78643K 12 0 proc 62 63K 95K 78643K 514 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 644 0 in_multi 63 3K 3K 78643K 194 0 ether_multi 1 0K 0K 78643K 14 0 mrt 0 0K 0K 78643K 747 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 257 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 113 46K 62K 78643K 4324 0 UVM aobj 22 6K 6K 78643K 24 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 498 0 NDP 13 0K 0K 78643K 28 0 temp 135 3046K 3110K 78643K 20531 0 kqueue 3 4K 14K 78643K 13 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 9 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 47 0 45 1 0 1 1 0 8 0 rtentry 112 419 0 391 2 0 2 2 0 8 0 unpcb 120 318 0 306 1 0 1 1 0 8 0 syncache 264 7 0 7 3 2 1 1 0 8 1 tcpqe 32 151 0 151 1 1 0 1 0 8 0 tcpcb 544 1467 0 1461 2 1 1 2 0 8 0 inpcb 280 5064 0 5054 2 0 2 2 0 8 1 rttmr 72 353 0 353 1 1 0 1 0 8 0 nd6 48 10 0 7 1 0 1 1 0 8 0 pffrag 232 9 0 9 4 3 1 1 0 482 1 pffrnode 88 9 0 9 4 3 1 1 0 8 1 pffrent 40 278 0 278 4 3 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 53 0 16 1 0 1 1 0 8 0 pfstkey 112 53 0 16 2 0 2 2 0 8 0 pfstate 328 53 0 16 4 0 4 4 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 256 323 0 182 12 0 12 12 0 8 0 art_table 32 324 0 182 2 0 2 2 0 8 0 art_node 16 416 0 394 1 0 1 1 0 8 0 sysvmsgpl 40 35 0 24 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 14 0 4 1 0 1 1 0 8 0 shmpl 112 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2797 0 1391 46 0 46 46 0 8 0 ffsino 272 2797 0 1391 95 0 95 95 0 8 0 nchpl 144 4378 0 2778 61 0 61 61 0 8 0 uvmvnodes 72 2976 0 0 55 0 55 55 0 8 0 vnodes 208 2976 0 0 157 0 157 157 0 8 0 namei 1024 10765 0 10765 1 0 1 1 0 8 1 percpumem 16 40 0 8 1 0 1 1 0 8 0 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 1 1 0 1 1 0 8 0 scxspl 192 13631 0 13631 10 9 1 7 0 8 1 plimitpl 152 38 0 30 1 0 1 1 0 8 0 sigapl 424 1403 0 1371 4 0 4 4 0 8 0 futexpl 56 19082 0 19081 1 0 1 1 0 8 0 knotepl 112 81 0 62 1 0 1 1 0 8 0 kqueuepl 144 55 0 53 1 0 1 1 0 8 0 pipelkpl 48 549 0 539 1 0 1 1 0 8 0 pipepl 120 1098 0 1079 3 1 2 2 0 8 1 fdescpl 496 1387 0 1371 3 0 3 3 0 8 0 filepl 152 9618 0 9511 5 0 5 5 0 8 0 lockfpl 104 99 0 98 1 0 1 1 0 8 0 lockfspl 48 40 0 39 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 25 0 14 1 0 1 1 0 8 0 ucredpl 96 293 0 284 1 0 1 1 0 8 0 zombiepl 144 1371 0 1370 1 0 1 1 0 8 0 processpl 984 1403 0 1370 5 0 5 5 0 8 0 procpl 624 3505 0 3461 4 0 4 4 0 8 0 sosppl 128 6 0 6 2 2 0 1 0 8 0 sockpl 400 5432 0 5408 7 3 4 5 0 8 1 mcl64k 65536 14 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 210 0 0 26 0 26 26 0 8 0 mtagpl 80 21 0 0 1 0 1 1 0 8 0 mbufpl 256 299 0 0 17 0 17 17 0 8 0 bufpl 280 7080 0 813 448 0 448 448 0 8 0 anonpl 16 122672 0 109248 79 8 71 71 0 124 12 amapchunkpl 152 6963 0 6821 15 8 7 11 0 158 1 amappl16 192 5996 0 5212 55 7 48 52 0 8 8 amappl15 184 10 0 9 2 1 1 1 0 8 0 amappl14 176 307 0 304 2 1 1 1 0 8 0 amappl13 168 31 0 30 1 0 1 1 0 8 0 amappl12 160 15 0 12 1 0 1 1 0 8 0 amappl11 152 73 0 55 1 0 1 1 0 8 0 amappl10 144 20 0 13 1 0 1 1 0 8 0 amappl9 136 1235 0 1230 1 0 1 1 0 8 0 amappl8 128 1163 0 1146 1 0 1 1 0 8 0 amappl7 120 129 0 114 1 0 1 1 0 8 0 amappl6 112 24 0 21 1 0 1 1 0 8 0 amappl5 104 1297 0 1280 1 0 1 1 0 8 0 amappl4 96 520 0 490 1 0 1 1 0 8 0 amappl3 88 127 0 122 1 0 1 1 0 8 0 amappl2 80 10115 0 10038 3 1 2 3 0 8 0 amappl1 72 37165 0 36708 25 15 10 20 0 8 0 amappl 80 3778 0 3726 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 23 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1391 0 1371 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1391 0 1371 1 0 1 1 0 8 0 vmmpekpl 168 13542 0 13509 2 0 2 2 0 8 0 vmmpepl 168 169215 0 167186 127 28 99 108 0 357 10 vmsppl 368 1390 0 1371 2 0 2 2 0 8 0 pdppl 4096 2790 0 2745 6 0 6 6 0 8 0 pvpl 32 363579 0 346860 186 14 172 172 0 265 27 pmappl 232 1390 0 1371 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 186 0 7 6 0 6 6 0 8 0