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 39991 74360 0 0x14000 0x200 1 reaper * 87861 40601 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(fffffd8063364de8,1,fffffd807f7bf900,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80680b5ef0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80680b5ef0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80680b5ef0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80680b5ef0,0) 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(fffffd8063364de8,1,fffffd807f7bf900,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80680b5ef0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80680b5ef0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80680b5ef0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80680b5ef0,0) 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 0xffff800020a2d590 rbx 0xffff800020a2d640 rdx 0xffff800020a19110 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0xe32cd242f542c3e3 r12 0x3000000008 r13 0xffff800020a2d5a0 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d580 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=87861 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19380,0xffff800020a18c40 process=0xffff800020a1a3d8 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 61165 401192 0 0 3 0x14200 bored sosplice 52712 160499 47271 0 2 0x482 syz-executor.1 91222 6582 47271 0 3 0x82 nanosleep syz-executor.0 47271 427315 39397 0 3 0x82 thrsleep syz-fuzzer 47271 435129 39397 0 3 0x4000082 nanosleep syz-fuzzer 47271 480928 39397 0 3 0x4000082 thrsleep syz-fuzzer 47271 268707 39397 0 3 0x4000082 thrsleep syz-fuzzer 47271 117714 39397 0 3 0x4000082 thrsleep syz-fuzzer 47271 465920 39397 0 3 0x4000082 thrsleep syz-fuzzer 47271 319825 39397 0 3 0x4000082 thrsleep syz-fuzzer 47271 322628 39397 0 3 0x4000082 kqread syz-fuzzer 47271 328606 39397 0 3 0x4000082 thrsleep syz-fuzzer 47271 443499 39397 0 3 0x4000082 thrsleep syz-fuzzer 39397 373186 78883 0 3 0x10008a pause ksh 78883 241594 91841 0 3 0x92 select sshd 32774 509939 1 0 3 0x100083 ttyin getty 91841 521191 1 0 3 0x80 select sshd 49884 200511 16366 74 3 0x100092 bpf pflogd 16366 280510 1 0 3 0x80 netio pflogd 88652 92857 97899 73 3 0x100090 kqread syslogd 97899 91229 1 0 3 0x100082 netio syslogd 38381 420749 1 77 3 0x100090 poll dhclient 27134 301326 1 0 3 0x80 poll dhclient 44883 358634 0 0 3 0x14200 bored smr 94716 212500 0 0 3 0x14200 pgzero zerothread 61159 456451 0 0 3 0x14200 aiodoned aiodoned 57406 501917 0 0 3 0x14200 syncer update 97790 254003 0 0 3 0x14200 cleaner cleaner 74360 39991 0 0 7 0x14200 reaper 2561 496081 0 0 3 0x14200 pgdaemon pagedaemon 21344 390325 0 0 3 0x14200 bored crynlk 8694 252273 0 0 3 0x14200 bored crypto 83944 385819 0 0 3 0x40014200 acpi0 acpi0 30409 85079 0 0 3 0x40014200 idle1 34560 377107 0 0 3 0x14200 bored softnet 30274 142369 0 0 3 0x14200 bored systqmp *40601 87861 0 0 7 0x14200 systq 91561 154701 0 0 2 0x40014200 softclock 40953 72684 0 0 3 0x40014200 idle0 1 220380 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 40601 (systq) thread 0xffff800020a19110 (87861) exclusive rrwlock inode r = 0 (0xfffffd80641f0c50) #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 9518 6478K 6785K 78643K 10778 0 pcb 13 8K 8K 78643K 53 0 rtable 91 2K 3K 78643K 221 0 ifaddr 65 12K 12K 78643K 69 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1479 0 iov 0 0K 12K 78643K 26 0 mount 1 1K 1K 78643K 1 0 vnodes 1217 77K 77K 78643K 1282 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 12 0K 0K 78643K 16 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 4 9K 25K 78643K 144 0 sigio 0 0K 0K 78643K 2 0 proc 62 63K 83K 78643K 456 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 9 0 in_multi 30 1K 2K 78643K 46 0 ether_multi 1 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 225 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 99 37K 53K 78643K 1381 0 UVM aobj 4 2K 2K 78643K 4 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 16 0 NDP 11 0K 0K 78643K 15 0 temp 99 3039K 3118K 78643K 2378 0 kqueue 3 4K 8K 78643K 7 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 7 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 19 0 17 1 0 1 1 0 8 0 rtentry 112 50 0 13 2 0 2 2 0 8 0 unpcb 120 105 0 93 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 258 0 258 1 1 0 1 0 8 0 tcpcb 544 49 0 45 1 0 1 1 0 8 0 inpcb 280 350 0 342 2 0 2 2 0 8 1 nd6 48 6 0 3 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 53 0 53 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 29 0 0 1 0 1 1 0 8 0 pfstkey 112 29 0 0 1 0 1 1 0 8 0 pfstate 328 29 0 0 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 256 200 0 48 12 0 12 12 0 8 1 art_table 32 201 0 48 2 0 2 2 0 8 0 art_node 16 49 0 15 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 14 0 4 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1596 0 190 46 0 46 46 0 8 0 ffsino 272 1596 0 190 95 0 95 95 0 8 0 nchpl 144 1988 0 368 61 0 61 61 0 8 0 uvmvnodes 72 1677 0 0 31 0 31 31 0 8 0 vnodes 208 1677 0 0 89 0 89 89 0 8 0 namei 1024 5214 0 5214 1 0 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 2 1 0 1 1 0 8 0 scxspl 192 6076 0 6076 8 1 7 7 0 8 7 plimitpl 152 23 0 15 1 0 1 1 0 8 0 sigapl 424 360 0 329 4 0 4 4 0 8 0 futexpl 56 2093 0 2093 1 0 1 1 0 8 1 knotepl 112 61 0 42 1 0 1 1 0 8 0 kqueuepl 144 18 0 16 1 0 1 1 0 8 0 pipelkpl 48 88 0 78 1 0 1 1 0 8 0 pipepl 120 176 0 157 1 0 1 1 0 8 0 fdescpl 496 344 0 329 3 0 3 3 0 8 0 filepl 152 1986 0 1882 5 0 5 5 0 8 0 lockfpl 104 16 0 15 1 0 1 1 0 8 0 lockfspl 48 8 0 7 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 96 158 0 149 1 0 1 1 0 8 0 zombiepl 144 329 0 327 1 0 1 1 0 8 0 processpl 984 360 0 327 5 0 5 5 0 8 0 procpl 624 630 0 587 4 0 4 4 0 8 0 sosppl 128 1 0 1 1 0 1 1 0 8 1 sockpl 400 481 0 460 4 0 4 4 0 8 1 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 174 0 0 21 0 21 21 0 8 0 mtagpl 80 13 0 0 1 0 1 1 0 8 0 mbufpl 256 267 0 0 18 1 17 17 0 8 0 bufpl 280 6311 0 174 439 0 439 439 0 8 0 anonpl 16 47970 0 33974 73 1 72 72 0 124 14 amapchunkpl 152 1686 0 1545 8 0 8 8 0 158 1 amappl16 192 1583 0 826 49 3 46 49 0 8 8 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 3 0 3 3 2 1 1 0 8 1 amappl13 168 25 0 24 1 0 1 1 0 8 0 amappl12 160 120 0 114 1 0 1 1 0 8 0 amappl11 152 92 0 72 2 0 2 2 0 8 1 amappl10 144 17 0 14 1 0 1 1 0 8 0 amappl9 136 389 0 386 1 0 1 1 0 8 0 amappl8 128 298 0 286 1 0 1 1 0 8 0 amappl7 120 120 0 108 1 0 1 1 0 8 0 amappl6 112 23 0 20 1 0 1 1 0 8 0 amappl5 104 355 0 337 1 0 1 1 0 8 0 amappl4 96 505 0 473 2 1 1 2 0 8 0 amappl3 88 115 0 109 1 0 1 1 0 8 0 amappl2 80 1787 0 1719 3 1 2 3 0 8 0 amappl1 72 17652 0 17224 25 14 11 20 0 8 1 amappl 80 883 0 837 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 348 0 330 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 348 0 330 1 0 1 1 0 8 0 vmmpekpl 168 6630 0 6601 2 0 2 2 0 8 0 vmmpepl 168 48843 0 46963 109 5 104 104 0 357 19 vmsppl 368 347 0 330 2 0 2 2 0 8 0 pdppl 4096 704 0 662 6 0 6 6 0 8 0 pvpl 32 158979 0 141837 174 1 173 173 0 265 33 pmappl 232 347 0 330 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 175 0 4 5 0 5 5 0 8 0