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 279995 89972 0 0x14000 0x200 0 reaper *409517 46008 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(fffffd80644b00e8,3,fffffd807f7bf7e0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8066bd79a0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8066bd79a0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8066bd79a0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8066bd79a0,0) 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(fffffd80644b00e8,3,fffffd807f7bf7e0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8066bd79a0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8066bd79a0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8066bd79a0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8066bd79a0,0) 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 0xffff800020a2d7c0 rbx 0xffff800020a2d870 rdx 0xffff800020a18ea0 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0x5ede3fdb6d16d720 r12 0x3000000008 r13 0xffff800020a2d7d0 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d7b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=409517 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19380,0xffff800020a189d0 process=0xffff800020a1af60 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 59296 272764 86808 0 3 0x80 nanosleep syz-executor.0 59296 393134 86808 0 3 0x4000080 pipewr syz-executor.0 59296 273524 86808 0 3 0x4000080 fsleep syz-executor.0 18128 116442 28769 0 3 0x82 nanosleep syz-executor.1 86808 315567 28769 0 3 0x82 nanosleep syz-executor.0 28769 501863 10122 0 3 0x82 thrsleep syz-fuzzer 28769 316169 10122 0 3 0x4000082 thrsleep syz-fuzzer 28769 450146 10122 0 3 0x4000082 thrsleep syz-fuzzer 28769 254742 10122 0 3 0x4000082 thrsleep syz-fuzzer 28769 279 10122 0 3 0x4000082 thrsleep syz-fuzzer 28769 320857 10122 0 3 0x4000082 thrsleep syz-fuzzer 28769 400747 10122 0 3 0x4000082 thrsleep syz-fuzzer 28769 279741 10122 0 3 0x4000082 thrsleep syz-fuzzer 28769 109566 10122 0 3 0x4000082 kqread syz-fuzzer 28769 453896 10122 0 3 0x4000082 thrsleep syz-fuzzer 28769 375472 10122 0 3 0x4000082 thrsleep syz-fuzzer 10122 200709 14974 0 3 0x10008a pause ksh 14974 505691 23057 0 3 0x92 select sshd 10931 30664 1 0 3 0x100083 ttyin getty 23057 506778 1 0 3 0x80 select sshd 73320 417564 60452 74 3 0x100092 bpf pflogd 60452 128900 1 0 3 0x80 netio pflogd 41081 504282 82453 73 3 0x100090 kqread syslogd 82453 416360 1 0 3 0x100082 netio syslogd 83624 230534 1 77 3 0x100090 poll dhclient 8890 461616 1 0 3 0x80 poll dhclient 29676 269620 0 0 3 0x14200 bored smr 58774 141721 0 0 3 0x14200 pgzero zerothread 11252 75429 0 0 3 0x14200 aiodoned aiodoned 15908 116805 0 0 3 0x14200 syncer update 50973 178564 0 0 3 0x14200 cleaner cleaner 89972 279995 0 0 7 0x14200 reaper 18177 270376 0 0 3 0x14200 pgdaemon pagedaemon 70081 30699 0 0 3 0x14200 bored crynlk 8559 119128 0 0 3 0x14200 bored crypto 89602 74533 0 0 3 0x40014200 acpi0 acpi0 27329 117012 0 0 3 0x40014200 idle1 60589 223315 0 0 3 0x14200 bored softnet 27584 290756 0 0 3 0x14200 bored systqmp *46008 409517 0 0 7 0x14200 systq 40631 218789 0 0 3 0x40014200 bored softclock 85161 322999 0 0 3 0x40014200 idle0 1 291458 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 46008 (systq) thread 0xffff800020a18ea0 (409517) exclusive rrwlock inode r = 0 (0xfffffd80644aee70) #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 9484 6403K 6669K 78643K 10633 0 pcb 13 8K 8K 78643K 13 0 rtable 105 3K 3K 78643K 207 0 ifaddr 49 11K 11K 78643K 55 0 counters 43 33K 34K 78643K 45 0 ioctlops 0 0K 4K 78643K 1469 0 iov 0 0K 12K 78643K 2 0 mount 1 1K 1K 78643K 1 0 vnodes 1225 77K 77K 78643K 1243 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 2 0K 0K 78643K 4 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 45 0 proc 59 63K 95K 78643K 443 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 33 2K 2K 78643K 33 0 ether_multi 1 0K 0K 78643K 1 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 207 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 107 21K 22K 78643K 1057 0 UVM aobj 4 2K 2K 78643K 4 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 7 0K 0K 78643K 12 0 temp 74 3036K 3100K 78643K 5158 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 45 0 1 2 0 2 2 0 8 0 unpcb 120 47 0 36 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 110 0 110 1 0 1 1 0 8 1 tcpcb 544 10 0 6 1 0 1 1 0 8 0 inpcb 280 39 0 32 1 0 1 1 0 8 0 nd6 48 6 0 0 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 12 0 0 1 0 1 1 0 8 0 pfstkey 112 12 0 0 1 0 1 1 0 8 0 pfstate 328 12 0 0 1 0 1 1 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 256 188 0 0 12 0 12 12 0 8 0 art_table 32 189 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 semapl 112 2 0 2 1 0 1 1 0 8 1 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 1449 0 38 46 0 46 46 0 8 0 ffsino 272 1449 0 38 95 0 95 95 0 8 0 nchpl 144 1698 0 73 61 0 61 61 0 8 0 uvmvnodes 72 1509 0 0 28 0 28 28 0 8 0 vnodes 208 1509 0 0 80 0 80 80 0 8 0 namei 1024 4348 0 4348 1 0 1 1 0 8 1 percpumem 16 33 0 1 1 0 1 1 0 8 0 scxspl 192 5093 0 5093 8 1 7 7 0 8 7 plimitpl 152 15 0 7 1 0 1 1 0 8 0 sigapl 424 260 0 229 4 0 4 4 0 8 0 futexpl 56 211 0 210 1 0 1 1 0 8 0 knotepl 112 53 0 34 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipelkpl 48 80 0 68 1 0 1 1 0 8 0 pipepl 120 160 0 137 1 0 1 1 0 8 0 fdescpl 496 245 0 229 4 1 3 3 0 8 0 filepl 152 1232 0 1125 5 0 5 5 0 8 0 lockfpl 104 9 0 8 1 0 1 1 0 8 0 lockfspl 48 4 0 3 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 68 0 59 1 0 1 1 0 8 0 zombiepl 144 229 0 228 1 0 1 1 0 8 0 processpl 984 260 0 228 5 0 5 5 0 8 0 procpl 624 303 0 258 4 0 4 4 0 8 0 sockpl 400 109 0 89 4 0 4 4 0 8 1 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 195 0 0 24 0 24 24 0 8 0 mtagpl 80 3 0 0 1 0 1 1 0 8 0 mbufpl 256 212 0 0 13 0 13 13 0 8 0 bufpl 280 4105 0 173 281 0 281 281 0 8 0 anonpl 16 35586 0 23206 51 1 50 50 0 124 0 amapchunkpl 152 1120 0 968 8 0 8 8 0 158 1 amappl16 192 801 0 151 33 0 33 33 0 8 0 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 11 0 6 2 1 1 1 0 8 0 amappl13 168 32 0 29 1 0 1 1 0 8 0 amappl12 160 5 0 5 2 2 0 1 0 8 0 amappl11 152 72 0 54 1 0 1 1 0 8 0 amappl10 144 29 0 21 1 0 1 1 0 8 0 amappl9 136 400 0 394 1 0 1 1 0 8 0 amappl8 128 300 0 287 1 0 1 1 0 8 0 amappl7 120 119 0 107 1 0 1 1 0 8 0 amappl6 112 28 0 22 1 0 1 1 0 8 0 amappl5 104 141 0 124 1 0 1 1 0 8 0 amappl4 96 506 0 474 2 1 1 2 0 8 0 amappl3 88 113 0 105 1 0 1 1 0 8 0 amappl2 80 1043 0 967 3 1 2 3 0 8 0 amappl1 72 15596 0 15135 25 12 13 20 0 8 3 amappl 80 555 0 504 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 24 245 0 228 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 245 0 228 1 0 1 1 0 8 0 vmmpekpl 168 5907 0 5873 2 0 2 2 0 8 0 vmmpepl 168 36728 0 34818 112 10 102 102 0 357 18 vmsppl 368 244 0 228 2 0 2 2 0 8 0 pdppl 4096 498 0 456 7 1 6 6 0 8 0 pvpl 32 130644 0 114970 132 1 131 131 0 265 2 pmappl 232 244 0 228 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 173 0 4 5 0 5 5 0 8 0