login: 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 146286 37753 0 0 0x4000000 0 syz-executor.1 *393860 63322 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(fffffd806417f8f8,1,fffffd807f7bf8a0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8066badc90,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8066badc90,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8066badc90,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8066badc90,0) 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(fffffd806417f8f8,1,fffffd807f7bf8a0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8066badc90,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8066badc90,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8066badc90,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8066badc90,0) 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 0xffff800020a2d7e0 rbx 0xffff800020a2d890 rdx 0xffff800020a18ea0 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0xb53382c382d36870 r12 0x3000000008 r13 0xffff800020a2d7f0 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d7d0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=393860 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19110,0xffff800020a18760 process=0xffff800020a1a7b0 user=0xffff800020a28000, vmspace=0xffffffff82648778 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 37753 44514 55740 0 2 0 syz-executor.1 37753 146286 55740 0 7 0x4000000 syz-executor.1 15091 459263 0 0 3 0x14200 bored sosplice 55740 115439 52262 0 3 0x82 nanosleep syz-executor.1 35531 58468 52262 0 2 0x482 syz-executor.0 52262 234633 1537 0 3 0x82 thrsleep syz-fuzzer 52262 460040 1537 0 3 0x4000082 nanosleep syz-fuzzer 52262 7799 1537 0 3 0x4000082 thrsleep syz-fuzzer 52262 252003 1537 0 3 0x4000082 thrsleep syz-fuzzer 52262 183079 1537 0 3 0x4000082 thrsleep syz-fuzzer 52262 523371 1537 0 3 0x4000082 kqread syz-fuzzer 52262 182748 1537 0 3 0x4000082 thrsleep syz-fuzzer 52262 443435 1537 0 3 0x4000082 thrsleep syz-fuzzer 52262 435953 1537 0 3 0x4000082 thrsleep syz-fuzzer 52262 181167 1537 0 3 0x4000082 thrsleep syz-fuzzer 1537 220720 45962 0 3 0x10008a pause ksh 45962 102395 32892 0 3 0x92 select sshd 96370 329168 1 0 3 0x100083 ttyin getty 32892 387994 1 0 3 0x80 select sshd 37166 409135 90250 74 3 0x100092 bpf pflogd 90250 406124 1 0 3 0x80 netio pflogd 45028 188137 60264 73 3 0x100090 kqread syslogd 60264 393590 1 0 3 0x100082 netio syslogd 53786 361913 1 77 3 0x100090 poll dhclient 97127 15324 1 0 3 0x80 poll dhclient 85550 509500 0 0 3 0x14200 bored smr 4401 39696 0 0 2 0x14200 zerothread 49646 395340 0 0 3 0x14200 aiodoned aiodoned 80037 321702 0 0 3 0x14200 syncer update 77618 323188 0 0 3 0x14200 cleaner cleaner 33167 246643 0 0 3 0x14200 reaper reaper 96111 240873 0 0 3 0x14200 pgdaemon pagedaemon 24917 295924 0 0 3 0x14200 bored crynlk 55052 63692 0 0 3 0x14200 bored crypto 97703 105526 0 0 3 0x40014200 acpi0 acpi0 41845 40639 0 0 3 0x40014200 idle1 92216 452072 0 0 3 0x14200 bored softnet 48923 356297 0 0 3 0x14200 bored systqmp *63322 393860 0 0 7 0x14200 systq 33573 187464 0 0 3 0x40014200 bored softclock 30237 392355 0 0 3 0x40014200 idle0 1 405370 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 63322 (systq) thread 0xffff800020a18ea0 (393860) exclusive rrwlock inode r = 0 (0xfffffd806e8aa0a8) #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 9495 6407K 6536K 78643K 10628 0 pcb 13 8K 8K 78643K 27 0 rtable 107 3K 3K 78643K 211 0 ifaddr 65 14K 14K 78643K 69 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1470 0 iov 0 0K 16K 78643K 102 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 77K 77K 78643K 1236 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 1K 1K 78643K 2 0 sem 6 0K 0K 78643K 6 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 84 0 proc 60 63K 95K 78643K 444 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 1 0 in_multi 59 3K 3K 78643K 61 0 ether_multi 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 1K 78643K 211 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 98 21K 22K 78643K 1170 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 8 0 NDP 9 0K 0K 78643K 13 0 temp 85 3037K 3101K 78643K 5416 0 kqueue 3 4K 4K 78643K 3 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 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 46 0 1 2 0 2 2 0 8 0 unpcb 120 57 0 45 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 73 0 73 1 0 1 1 0 8 1 tcpcb 544 26 0 22 1 0 1 1 0 8 0 inpcb 280 93 0 86 1 0 1 1 0 8 0 nd6 48 7 0 0 1 0 1 1 0 8 0 pffrag 232 4 0 4 1 0 1 1 0 482 1 pffrnode 88 4 0 4 1 0 1 1 0 8 1 pffrent 40 180 0 180 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 17 0 0 1 0 1 1 0 8 0 pfstkey 112 17 0 0 1 0 1 1 0 8 0 pfstate 328 17 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 256 189 0 0 12 0 12 12 0 8 0 art_table 32 190 0 0 2 0 2 2 0 8 0 art_node 16 45 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1494 0 86 46 0 46 46 0 8 0 ffsino 272 1494 0 86 95 0 95 95 0 8 1 nchpl 144 1823 0 205 61 0 61 61 0 8 0 uvmvnodes 72 1546 0 0 29 0 29 29 0 8 0 vnodes 208 1546 0 0 82 0 82 82 0 8 0 namei 1024 4665 0 4665 1 0 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 vcpupl 1984 1 0 0 1 0 1 1 0 8 0 vmpool 560 1 0 0 1 0 1 1 0 8 0 scxspl 192 5644 0 5644 5 1 4 4 0 8 4 plimitpl 152 21 0 13 1 0 1 1 0 8 0 sigapl 424 300 0 268 4 0 4 4 0 8 0 futexpl 56 940 0 940 1 0 1 1 0 8 1 knotepl 112 53 0 34 1 0 1 1 0 8 0 kqueuepl 144 14 0 12 1 0 1 1 0 8 0 pipelkpl 48 90 0 80 1 0 1 1 0 8 0 pipepl 120 180 0 161 1 0 1 1 0 8 0 fdescpl 496 284 0 268 3 0 3 3 0 8 0 filepl 152 1500 0 1396 5 0 5 5 0 8 0 lockfpl 104 36 0 35 1 0 1 1 0 8 0 lockfspl 48 13 0 12 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 77 0 68 1 0 1 1 0 8 0 zombiepl 144 268 0 267 1 0 1 1 0 8 0 processpl 984 300 0 267 5 0 5 5 0 8 0 procpl 624 418 0 375 4 0 4 4 0 8 0 sosppl 128 1 0 1 1 0 1 1 0 8 1 sockpl 400 171 0 150 3 0 3 3 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 mcl2k 2048 172 0 0 21 0 21 21 0 8 0 mtagpl 80 4 0 0 1 0 1 1 0 8 0 mbufpl 256 262 0 0 16 0 16 16 0 8 0 bufpl 280 4348 0 172 299 0 299 299 0 8 0 anonpl 16 43604 0 29841 71 1 70 70 0 124 12 amapchunkpl 152 1316 0 1172 8 0 8 8 0 158 0 amappl16 192 1354 0 628 48 0 48 48 0 8 11 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 1 0 1 1 1 0 1 0 8 0 amappl13 168 50 0 47 1 0 1 1 0 8 0 amappl12 160 14 0 13 2 1 1 1 0 8 0 amappl11 152 101 0 81 2 0 2 2 0 8 1 amappl10 144 22 0 18 1 0 1 1 0 8 0 amappl9 136 390 0 387 1 0 1 1 0 8 0 amappl8 128 298 0 284 1 0 1 1 0 8 0 amappl7 120 118 0 108 1 0 1 1 0 8 0 amappl6 112 52 0 47 1 0 1 1 0 8 0 amappl5 104 160 0 144 1 0 1 1 0 8 0 amappl4 96 531 0 497 2 1 1 2 0 8 0 amappl3 88 134 0 125 1 0 1 1 0 8 0 amappl2 80 1347 0 1276 3 1 2 3 0 8 0 amappl1 72 16057 0 15619 26 13 13 20 0 8 3 amappl 80 672 0 627 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 285 0 268 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 285 0 268 1 0 1 1 0 8 0 vmmpekpl 168 6159 0 6127 2 0 2 2 0 8 0 vmmpepl 168 41634 0 39777 108 8 100 100 0 357 14 vmsppl 368 284 0 268 2 0 2 2 0 8 0 pdppl 4096 578 0 537 6 0 6 6 0 8 0 pvpl 32 146936 0 130033 174 1 173 173 0 265 33 pmappl 232 284 0 268 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 172 0 3 5 0 5 5 0 8 0