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 473733 31996 0 0x14000 0x200 0 reaper * 4053 2013 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(fffffd80680b6000,1,fffffd807f7bfa80,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806cc3b600,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806cc3b600,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806cc3b600,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806cc3b600,0) 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(fffffd80680b6000,1,fffffd807f7bfa80,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806cc3b600,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806cc3b600,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806cc3b600,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806cc3b600,0) 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 0xffff800020a2dbc0 rbx 0xffff800020a2dc70 rdx 0xffff800020a18c30 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0x91d4bb5ea19835e5 r12 0x3000000008 r13 0xffff800020a2dbd0 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2dbb0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=4053 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a18ea0,0xffff800020a189d0 process=0xffff800020a1a3d8 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 57949 164896 47119 0 3 0x80 nanosleep syz-executor.0 57949 41904 47119 0 3 0x4000080 bell syz-executor.0 57949 397689 47119 0 3 0x4000080 fsleep syz-executor.0 47119 481212 82033 0 3 0x82 nanosleep syz-executor.0 39759 494494 0 0 3 0x14200 bored sosplice 34626 340738 82033 0 3 0x82 nanosleep syz-executor.1 82033 38868 18462 0 3 0x82 thrsleep syz-fuzzer 82033 103935 18462 0 3 0x4000082 thrsleep syz-fuzzer 82033 67136 18462 0 3 0x4000082 thrsleep syz-fuzzer 82033 481789 18462 0 3 0x4000082 thrsleep syz-fuzzer 82033 375332 18462 0 3 0x4000082 thrsleep syz-fuzzer 82033 10594 18462 0 3 0x4000082 thrsleep syz-fuzzer 82033 147154 18462 0 3 0x4000082 thrsleep syz-fuzzer 82033 45333 18462 0 3 0x4000082 thrsleep syz-fuzzer 82033 79329 18462 0 3 0x4000082 kqread syz-fuzzer 82033 406586 18462 0 3 0x4000082 thrsleep syz-fuzzer 18462 122936 69547 0 3 0x10008a pause ksh 69547 361149 45840 0 3 0x92 select sshd 37131 257738 1 0 3 0x100083 ttyin getty 45840 442767 1 0 3 0x80 select sshd 1101 159923 95045 74 3 0x100092 bpf pflogd 95045 355032 1 0 3 0x80 netio pflogd 18353 220827 71802 73 3 0x100090 kqread syslogd 71802 486929 1 0 3 0x100082 netio syslogd 67145 281700 1 77 3 0x100090 poll dhclient 34299 325632 1 0 3 0x80 poll dhclient 7623 363414 0 0 3 0x14200 bored smr 96443 370134 0 0 3 0x14200 pgzero zerothread 50852 97850 0 0 3 0x14200 aiodoned aiodoned 20239 105505 0 0 3 0x14200 syncer update 63862 355611 0 0 3 0x14200 cleaner cleaner 31996 473733 0 0 7 0x14200 reaper 32974 375471 0 0 3 0x14200 pgdaemon pagedaemon 15492 472227 0 0 3 0x14200 bored crynlk 87084 484899 0 0 3 0x14200 bored crypto 59458 437042 0 0 3 0x40014200 acpi0 acpi0 64227 80631 0 0 3 0x40014200 idle1 56567 310676 0 0 3 0x14200 bored softnet 65001 147878 0 0 3 0x14200 bored systqmp * 2013 4053 0 0 7 0x14200 systq 69188 36006 0 0 3 0x40014200 bored softclock 52307 147063 0 0 3 0x40014200 idle0 1 260869 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 2013 (systq) thread 0xffff800020a18c30 (4053) exclusive rrwlock inode r = 0 (0xfffffd80643e62c0) #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 9504 6410K 6728K 78643K 10896 0 pcb 13 8K 8K 78643K 83 0 rtable 85 2K 3K 78643K 287 0 ifaddr 65 13K 13K 78643K 84 0 counters 43 33K 34K 78643K 47 0 ioctlops 0 0K 4K 78643K 1525 0 iov 0 0K 12K 78643K 15 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1311 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 9 0K 1K 78643K 16 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 179 0 proc 61 63K 95K 78643K 492 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 10 0 in_multi 52 3K 3K 78643K 89 0 ether_multi 1 0K 0K 78643K 9 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 238 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 111 54K 54K 78643K 1531 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 40 0 NDP 10 0K 0K 78643K 18 0 temp 97 3039K 3105K 78643K 12534 0 kqueue 3 4K 6K 78643K 4 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 35 0 33 1 0 1 1 0 8 0 rtentry 112 63 0 29 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 53 0 53 1 1 0 1 0 8 0 tcpcb 544 191 0 185 1 0 1 1 0 8 0 inpcb 280 408 0 399 2 0 2 2 0 8 1 nd6 48 9 0 3 1 0 1 1 0 8 0 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 21 0 3 1 0 1 1 0 8 0 pfstkey 112 21 0 3 1 0 1 1 0 8 0 pfstate 328 21 0 3 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 256 307 0 124 13 1 12 13 0 8 0 art_table 32 308 0 124 2 0 2 2 0 8 0 art_node 16 62 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 9 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 10 0 3 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 1605 0 193 46 0 46 46 0 8 0 ffsino 272 1605 0 193 95 0 95 95 0 8 0 nchpl 144 2038 0 433 61 0 61 61 0 8 0 uvmvnodes 72 1724 0 0 32 0 32 32 0 8 0 vnodes 208 1724 0 0 91 0 91 91 0 8 0 namei 1024 5429 0 5429 1 0 1 1 0 8 1 percpumem 16 34 0 2 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 0 1 0 1 1 0 8 0 scxspl 192 6255 0 6255 8 7 1 7 0 8 1 plimitpl 152 30 0 22 1 0 1 1 0 8 0 sigapl 424 392 0 360 4 0 4 4 0 8 0 futexpl 56 2277 0 2276 1 0 1 1 0 8 0 knotepl 112 67 0 48 1 0 1 1 0 8 0 kqueuepl 144 13 0 10 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 496 376 0 360 4 1 3 3 0 8 0 filepl 152 2131 0 2024 5 0 5 5 0 8 0 lockfpl 104 44 0 43 1 0 1 1 0 8 0 lockfspl 48 18 0 17 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 21 0 10 1 0 1 1 0 8 0 ucredpl 96 135 0 126 1 0 1 1 0 8 0 zombiepl 144 360 0 359 1 0 1 1 0 8 0 processpl 984 392 0 359 5 0 5 5 0 8 0 procpl 624 731 0 686 4 0 4 4 0 8 0 sosppl 128 5 0 5 2 1 1 1 0 8 1 sockpl 400 550 0 527 5 1 4 4 0 8 1 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 162 0 0 20 0 20 20 0 8 0 mtagpl 80 17 0 0 1 0 1 1 0 8 0 mbufpl 256 194 0 0 12 0 12 12 0 8 0 bufpl 280 4513 0 175 310 0 310 310 0 8 0 anonpl 16 54452 0 41001 74 1 73 73 0 124 16 amapchunkpl 152 2243 0 2101 11 1 10 10 0 158 3 amappl16 192 1673 0 911 50 4 46 50 0 8 7 amappl15 184 10 0 8 2 1 1 1 0 8 0 amappl14 176 5 0 4 2 1 1 1 0 8 0 amappl13 168 32 0 31 1 0 1 1 0 8 0 amappl12 160 19 0 18 2 1 1 1 0 8 0 amappl11 152 136 0 116 1 0 1 1 0 8 0 amappl10 144 20 0 14 1 0 1 1 0 8 0 amappl9 136 459 0 454 1 0 1 1 0 8 0 amappl8 128 390 0 373 1 0 1 1 0 8 0 amappl7 120 127 0 114 1 0 1 1 0 8 0 amappl6 112 83 0 79 1 0 1 1 0 8 0 amappl5 104 266 0 249 1 0 1 1 0 8 0 amappl4 96 516 0 486 2 1 1 2 0 8 0 amappl3 88 111 0 105 1 0 1 1 0 8 0 amappl2 80 1999 0 1922 3 1 2 3 0 8 0 amappl1 72 18622 0 18157 25 15 10 20 0 8 0 amappl 80 1002 0 952 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 24 380 0 359 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 380 0 359 1 0 1 1 0 8 0 vmmpekpl 168 6917 0 6879 2 0 2 2 0 8 0 vmmpepl 168 53422 0 51402 120 10 110 110 0 357 22 vmsppl 368 379 0 359 2 0 2 2 0 8 0 pdppl 4096 768 0 722 7 1 6 6 0 8 0 pvpl 32 171681 0 154994 176 0 176 176 0 265 36 pmappl 232 379 0 359 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 172 0 6 5 0 5 5 0 8 0