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 274258 2846 0 0x14000 0x200 1 reaper *366051 56431 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(fffffd8063881430,1,fffffd807f7bf720,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80679ea3a8,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80679ea3a8,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80679ea3a8,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80679ea3a8,0) 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(fffffd8063881430,1,fffffd807f7bf720,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80679ea3a8,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80679ea3a8,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80679ea3a8,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80679ea3a8,0) 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 0xffff800020a2d6a0 rbx 0xffff800020a2d750 rdx 0xffff800020a19380 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0x6f961182cb88dad4 r12 0x3000000008 r13 0xffff800020a2d6b0 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d690 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=366051 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a195f0,0xffff800020a18eb0 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 56441 515526 61809 0 2 0 syz-executor.0 56441 205311 61809 0 3 0x4000080 fsleep syz-executor.0 56441 61899 61809 0 2 0x4000000 syz-executor.0 38773 163421 0 0 3 0x14200 bored sosplice 68100 139698 63500 0 3 0x82 nanosleep syz-executor.1 61809 363723 63500 0 3 0x82 nanosleep syz-executor.0 63500 377602 47286 0 3 0x82 thrsleep syz-fuzzer 63500 456410 47286 0 3 0x4000082 thrsleep syz-fuzzer 63500 514770 47286 0 3 0x4000082 thrsleep syz-fuzzer 63500 7077 47286 0 3 0x4000082 thrsleep syz-fuzzer 63500 393880 47286 0 3 0x4000082 thrsleep syz-fuzzer 63500 377601 47286 0 3 0x4000082 thrsleep syz-fuzzer 63500 43674 47286 0 3 0x4000082 thrsleep syz-fuzzer 63500 6245 47286 0 3 0x4000082 kqread syz-fuzzer 63500 522870 47286 0 3 0x4000082 thrsleep syz-fuzzer 63500 103986 47286 0 3 0x4000082 thrsleep syz-fuzzer 47286 326493 29343 0 3 0x10008a pause ksh 29343 445052 1723 0 3 0x92 select sshd 32592 107090 1 0 3 0x100083 ttyin getty 1723 179023 1 0 3 0x80 select sshd 63460 35019 18384 74 3 0x100092 bpf pflogd 18384 112787 1 0 3 0x80 netio pflogd 60288 95971 44181 73 3 0x100090 kqread syslogd 44181 38687 1 0 3 0x100082 netio syslogd 70137 106370 1 77 3 0x100090 poll dhclient 80619 391085 1 0 3 0x80 poll dhclient 67159 20383 0 0 3 0x14200 bored smr 4683 484047 0 0 2 0x14200 zerothread 40271 269585 0 0 3 0x14200 aiodoned aiodoned 7647 464235 0 0 3 0x14200 syncer update 96812 306283 0 0 3 0x14200 cleaner cleaner 2846 274258 0 0 7 0x14200 reaper 50576 240742 0 0 3 0x14200 pgdaemon pagedaemon 88542 181773 0 0 3 0x14200 bored crynlk 42594 208983 0 0 3 0x14200 bored crypto 71328 409697 0 0 3 0x40014200 acpi0 acpi0 59226 242885 0 0 3 0x40014200 idle1 17409 465461 0 0 3 0x14200 bored softnet 33253 479908 0 0 3 0x14200 bored systqmp *56431 366051 0 0 7 0x14200 systq 92555 64918 0 0 2 0x40014200 softclock 7466 124648 0 0 3 0x40014200 idle0 1 301997 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 56431 (systq) thread 0xffff800020a19380 (366051) exclusive rrwlock inode r = 0 (0xfffffd806e756e78) #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 9530 6421K 7186K 78643K 11349 0 pcb 13 8K 8K 78643K 134 0 rtable 90 4K 4K 78643K 390 0 ifaddr 96 19K 19K 78643K 167 0 counters 43 33K 34K 78643K 61 0 ioctlops 0 0K 4K 78643K 1508 0 iov 0 0K 16K 78643K 93 0 mount 1 1K 1K 78643K 1 0 vnodes 1230 77K 78K 78643K 1479 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 65 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 440 0 sigio 0 0K 0K 78643K 38 0 proc 62 63K 95K 78643K 517 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 49 0 in_multi 90 4K 4K 78643K 168 0 ether_multi 1 0K 0K 78643K 19 0 mrt 0 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 245 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 113 86K 86K 78643K 2432 0 UVM aobj 27 7K 7K 78643K 30 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 110 0 NDP 14 0K 0K 78643K 30 0 temp 122 3046K 3111K 78643K 10864 0 kqueue 3 4K 10K 78643K 25 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 9 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 59 0 57 1 0 1 1 0 8 0 rtentry 112 73 0 41 2 0 2 2 0 8 0 unpcb 120 259 0 247 1 0 1 1 0 8 0 syncache 264 9 0 9 3 2 1 1 0 8 1 tcpqe 32 52 0 52 1 1 0 1 0 8 0 tcpcb 544 211 0 206 1 0 1 1 0 8 0 inpcb 280 1287 0 1277 2 0 2 2 0 8 1 rttmr 72 3 0 3 1 1 0 1 0 8 0 nd6 48 12 0 7 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrag 232 3 0 3 2 1 1 1 0 482 1 pffrnode 88 3 0 3 2 1 1 1 0 8 1 pffrent 40 6 0 6 2 1 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 49 0 9 1 0 1 1 0 8 0 pfstkey 112 49 0 9 2 0 2 2 0 8 0 pfstate 328 49 0 9 4 0 4 4 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 423 0 231 17 2 15 17 0 8 2 art_table 32 425 0 231 3 0 3 3 0 8 0 art_node 16 72 0 45 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 2 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 55 0 45 1 0 1 1 0 8 0 shmpl 112 28 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2045 0 639 46 0 46 46 0 8 0 ffsino 272 2045 0 639 94 0 94 94 0 8 0 nchpl 144 2832 0 1209 61 0 61 61 0 8 0 uvmvnodes 72 2274 0 0 42 0 42 42 0 8 0 vnodes 208 2274 0 0 120 0 120 120 0 8 0 namei 1024 7744 0 7744 1 0 1 1 0 8 1 percpumem 16 41 0 9 1 0 1 1 0 8 0 vcpupl 1984 7 0 0 1 0 1 1 0 8 0 vmpool 560 10 0 3 1 0 1 1 0 8 0 scxspl 192 8998 0 8998 8 6 2 5 0 8 2 plimitpl 152 45 0 37 1 0 1 1 0 8 0 sigapl 424 656 0 624 4 0 4 4 0 8 0 futexpl 56 7425 0 7424 1 0 1 1 0 8 0 knotepl 112 81 0 62 1 0 1 1 0 8 0 kqueuepl 144 78 0 76 1 0 1 1 0 8 0 pipelkpl 48 178 0 168 1 0 1 1 0 8 0 pipepl 120 356 0 337 2 1 1 2 0 8 0 fdescpl 496 640 0 624 3 0 3 3 0 8 0 filepl 152 4376 0 4269 7 2 5 6 0 8 0 lockfpl 104 163 0 162 1 0 1 1 0 8 0 lockfspl 48 48 0 47 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 279 0 270 1 0 1 1 0 8 0 zombiepl 144 624 0 623 1 0 1 1 0 8 0 processpl 984 656 0 623 5 0 5 5 0 8 0 procpl 624 1651 0 1607 4 0 4 4 0 8 0 srpgc 64 4 0 4 2 2 0 1 0 8 0 sosppl 128 2 0 2 2 2 0 1 0 8 0 sockpl 400 1609 0 1584 7 3 4 6 0 8 1 mcl64k 65536 10 0 0 2 0 2 2 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 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 156 0 0 19 0 19 19 0 8 0 mtagpl 80 18 0 0 1 0 1 1 0 8 0 mbufpl 256 223 0 0 14 0 14 14 0 8 0 bufpl 280 7405 0 1138 448 0 448 448 0 8 0 anonpl 16 79703 0 65649 81 8 73 73 0 124 16 amapchunkpl 152 4069 0 3927 20 8 12 20 0 158 5 amappl16 192 3429 0 2663 66 15 51 51 0 8 12 amappl15 184 409 0 404 1 0 1 1 0 8 0 amappl14 176 4 0 2 2 1 1 1 0 8 0 amappl13 168 28 0 26 1 0 1 1 0 8 0 amappl12 160 4 0 4 3 3 0 1 0 8 0 amappl11 152 74 0 56 1 0 1 1 0 8 0 amappl10 144 22 0 16 1 0 1 1 0 8 0 amappl9 136 388 0 384 1 0 1 1 0 8 0 amappl8 128 316 0 300 1 0 1 1 0 8 0 amappl7 120 117 0 105 1 0 1 1 0 8 0 amappl6 112 22 0 19 2 1 1 1 0 8 0 amappl5 104 542 0 525 1 0 1 1 0 8 0 amappl4 96 507 0 476 2 1 1 2 0 8 0 amappl3 88 131 0 125 1 0 1 1 0 8 0 amappl2 80 4623 0 4544 3 1 2 3 0 8 0 amappl1 72 23846 0 23391 26 16 10 20 0 8 0 amappl 80 1909 0 1860 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 29 0 3 1 0 1 1 0 8 0 uaddrrnd 24 650 0 626 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 650 0 626 1 0 1 1 0 8 0 vmmpekpl 168 8359 0 8321 2 0 2 2 0 8 0 vmmpepl 168 84418 0 82401 114 14 100 100 0 357 12 vmsppl 368 649 0 626 3 0 3 3 0 8 0 pdppl 4096 1308 0 1259 7 0 7 7 0 8 0 pvpl 32 237172 0 219890 185 8 177 177 0 265 36 pmappl 232 649 0 626 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 182 0 8 6 0 6 6 0 8 0