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 147647 72798 0 0x14000 0x200 1 reaper *262550 38877 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(fffffd806cb81770,1,fffffd807f7bf6c0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806582c280,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806582c280,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806582c280,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806582c280,0) 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(fffffd806cb81770,1,fffffd807f7bf6c0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806582c280,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806582c280,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806582c280,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806582c280,0) 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 0xffff800020a2d750 rbx 0xffff800020a2d800 rdx 0xffff800020a184e0 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0x39524a5c068fae62 r12 0x3000000008 r13 0xffff800020a2d760 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d740 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=262550 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a18c30,0xffff800020a18280 process=0xffff800020a1a7b0 user=0xffff800020a28000, vmspace=0xffffffff82648778 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 57598 321655 99448 0 2 0 syz-executor.0 99448 505640 30218 0 2 0x482 syz-executor.0 49636 172195 1 0 3 0x100083 ttyin getty 6285 233945 0 0 3 0x14200 acct acct 47939 406918 0 0 3 0x14200 bored sosplice 48238 460229 30218 0 3 0x82 nanosleep syz-executor.1 30218 151776 34469 0 3 0x82 thrsleep syz-fuzzer 30218 391996 34469 0 2 0x4000482 syz-fuzzer 30218 228305 34469 0 2 0x4000482 syz-fuzzer 30218 390883 34469 0 3 0x4000082 thrsleep syz-fuzzer 30218 215610 34469 0 3 0x4000082 thrsleep syz-fuzzer 30218 21386 34469 0 3 0x4000082 thrsleep syz-fuzzer 30218 221421 34469 0 3 0x4000082 thrsleep syz-fuzzer 30218 177259 34469 0 3 0x4000082 thrsleep syz-fuzzer 30218 294350 34469 0 3 0x4000082 thrsleep syz-fuzzer 30218 485630 34469 0 3 0x4000082 kqread syz-fuzzer 34469 516373 26588 0 3 0x10008a pause ksh 26588 455892 75349 0 3 0x92 select sshd 75349 60065 1 0 3 0x80 select sshd 27010 348456 59050 74 3 0x100092 bpf pflogd 59050 384502 1 0 3 0x80 netio pflogd 79708 290390 8216 73 3 0x100090 kqread syslogd 8216 155219 1 0 3 0x100082 netio syslogd 53676 409345 1 77 3 0x100090 poll dhclient 56507 87755 1 0 3 0x80 poll dhclient 40886 317335 0 0 3 0x14200 bored smr 30997 360644 0 0 2 0x14200 zerothread 49900 429353 0 0 3 0x14200 aiodoned aiodoned 5497 118298 0 0 3 0x14200 syncer update 692 408479 0 0 3 0x14200 cleaner cleaner 72798 147647 0 0 7 0x14200 reaper 3024 177496 0 0 3 0x14200 pgdaemon pagedaemon 13948 26517 0 0 3 0x14200 bored crynlk 75968 10700 0 0 3 0x14200 bored crypto 48708 448763 0 0 3 0x40014200 acpi0 acpi0 18712 54347 0 0 3 0x40014200 idle1 20717 331194 0 0 3 0x14200 bored softnet 21592 514540 0 0 3 0x14200 bored systqmp *38877 262550 0 0 7 0x14200 systq 31253 221931 0 0 3 0x40014200 bored softclock 44817 248637 0 0 3 0x40014200 idle0 1 475253 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 38877 (systq) thread 0xffff800020a184e0 (262550) exclusive rrwlock inode r = 0 (0xfffffd806e382928) #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 9546 6438K 7273K 78643K 14260 0 pcb 13 8K 8K 78643K 228 0 rtable 84 3K 4K 78643K 632 0 ifaddr 105 21K 22K 78643K 303 0 counters 43 33K 34K 78643K 95 0 ioctlops 0 0K 4K 78643K 1540 0 iov 0 0K 16K 78643K 103 0 mount 1 1K 1K 78643K 1 0 vnodes 1217 77K 77K 78643K 2282 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 21 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 95 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 2486 0 sigio 0 0K 0K 78643K 35 0 proc 67 63K 83K 78643K 701 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 258 0 in_multi 162 6K 6K 78643K 466 0 ether_multi 1 0K 0K 78643K 94 0 mrt 0 0K 0K 78643K 35 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 67 307K 307K 78643K 67 0 exec 0 0K 1K 78643K 383 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 128 200K 201K 78643K 6794 0 UVM aobj 35 7K 7K 78643K 35 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 205 0 NDP 15 0K 0K 78643K 56 0 temp 148 3047K 3111K 78643K 16103 0 kqueue 3 4K 20K 78643K 95 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 11 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 130 0 128 1 0 1 1 0 8 0 rtentry 112 107 0 77 2 0 2 2 0 8 0 unpcb 120 467 0 447 1 0 1 1 0 8 0 syncache 264 39 0 39 4 4 0 1 0 8 0 tcpqe 32 9 0 9 2 2 0 1 0 8 0 tcpcb 544 649 0 641 3 2 1 2 0 8 0 inpcb 280 1611 0 1600 2 0 2 2 0 8 0 rttmr 72 4 0 4 1 1 0 1 0 8 0 nd6 48 21 0 19 1 0 1 1 0 8 0 pkpcb 40 27 0 27 3 2 1 1 0 8 1 ppxss 1128 8 0 8 2 2 0 1 0 8 0 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 45 0 45 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 80 0 32 1 0 1 1 0 8 0 pfstkey 112 80 0 32 2 0 2 2 0 8 0 pfstate 328 80 0 32 5 0 5 5 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 256 565 0 416 14 2 12 13 0 8 0 art_table 32 566 0 416 2 0 2 2 0 8 0 art_node 16 106 0 80 1 0 1 1 0 8 0 sysvmsgpl 40 49 0 21 1 0 1 1 0 8 0 semapl 112 93 0 83 1 0 1 1 0 8 0 shmpl 112 33 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 4687 0 3281 46 0 46 46 0 8 0 ffsino 272 4687 0 3281 95 0 95 95 0 8 0 nchpl 144 7713 0 6106 61 0 61 61 0 8 0 uvmvnodes 72 5509 0 0 101 0 101 101 0 8 0 vnodes 208 5509 0 0 290 0 290 290 0 8 0 namei 1024 19553 0 19553 1 0 1 1 0 8 1 percpumem 16 58 0 26 1 0 1 1 0 8 0 vcpupl 1984 12 0 0 2 0 2 2 0 8 0 vmpool 560 12 0 0 1 0 1 1 0 8 0 scsiplug 64 4 0 4 1 0 1 1 0 8 1 scxspl 192 23039 0 23039 8 6 2 6 0 8 2 plimitpl 152 165 0 157 1 0 1 1 0 8 0 sigapl 424 2698 0 2665 4 0 4 4 0 8 0 futexpl 56 15808 0 15808 1 0 1 1 0 8 1 knotepl 112 189 0 170 1 0 1 1 0 8 0 kqueuepl 144 234 0 232 1 0 1 1 0 8 0 pipelkpl 48 174 0 164 1 0 1 1 0 8 0 pipepl 120 348 0 329 1 0 1 1 0 8 0 fdescpl 496 2681 0 2665 3 0 3 3 0 8 0 filepl 152 9080 0 8977 5 0 5 5 0 8 0 lockfpl 104 276 0 275 1 0 1 1 0 8 0 lockfspl 48 115 0 114 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 1271 0 1262 1 0 1 1 0 8 0 zombiepl 144 2665 0 2664 1 0 1 1 0 8 0 processpl 984 2698 0 2664 5 0 5 5 0 8 0 procpl 624 5836 0 5792 4 0 4 4 0 8 0 sosppl 128 37 0 37 2 1 1 1 0 8 1 sockpl 400 2241 0 2203 7 2 5 5 0 8 0 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k 2048 154 0 0 18 0 18 18 0 8 0 mtagpl 80 172 0 0 4 0 4 4 0 8 0 mbufpl 256 763 0 0 45 0 45 45 0 8 0 bufpl 280 7653 0 1386 448 0 448 448 0 8 0 anonpl 16 197533 0 188926 53 16 37 52 0 124 0 amapchunkpl 152 10208 0 10071 12 5 7 8 0 158 1 amappl16 192 10581 0 10111 38 14 24 34 0 8 0 amappl15 184 3797 0 3788 1 0 1 1 0 8 0 amappl14 176 3 0 2 3 2 1 1 0 8 0 amappl13 168 37 0 36 1 0 1 1 0 8 0 amappl12 160 6 0 6 1 1 0 1 0 8 0 amappl11 152 79 0 61 1 0 1 1 0 8 0 amappl10 144 18 0 11 1 0 1 1 0 8 0 amappl9 136 389 0 386 1 0 1 1 0 8 0 amappl8 128 360 0 344 1 0 1 1 0 8 0 amappl7 120 134 0 120 1 0 1 1 0 8 0 amappl6 112 23 0 22 1 0 1 1 0 8 0 amappl5 104 2581 0 2561 1 0 1 1 0 8 0 amappl4 96 532 0 502 2 1 1 2 0 8 0 amappl3 88 119 0 110 1 0 1 1 0 8 0 amappl2 80 22842 0 22764 3 1 2 3 0 8 0 amappl1 72 54714 0 54265 25 15 10 20 0 8 0 amappl 80 6147 0 6092 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 34 0 0 1 0 1 1 0 8 0 uaddrrnd 24 2693 0 2664 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2693 0 2664 1 0 1 1 0 8 0 vmmpekpl 168 15899 0 15864 2 0 2 2 0 8 0 vmmpepl 168 307034 0 305331 112 27 85 85 0 357 10 vmsppl 368 2692 0 2664 3 0 3 3 0 8 0 pdppl 4096 5394 0 5340 7 0 7 7 0 8 0 pvpl 32 677196 0 665391 157 39 118 136 0 265 15 pmappl 232 2692 0 2664 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 211 0 9 6 0 6 6 0 8 0