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 443143 87207 0 0x14000 0x200 1 reaper *373529 21809 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(fffffd80671c3420,1,fffffd807f7bf420,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80677f8ef0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80677f8ef0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80677f8ef0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80677f8ef0,0) 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(fffffd80671c3420,1,fffffd807f7bf420,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80677f8ef0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80677f8ef0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80677f8ef0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80677f8ef0,0) 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 0xffff800020a2db90 rbx 0xffff800020a2dc40 rdx 0xffff800020a18c30 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0xec90356ff2592c11 r12 0x3000000008 r13 0xffff800020a2dba0 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2db80 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=373529 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19380,0xffff800020a18280 process=0xffff800020a1a3d8 user=0xffff800020a28000, vmspace=0xffffffff82648778 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 28604 382479 78413 0 3 0x80 nanosleep syz-executor.0 28604 500481 78413 0 3 0x4000080 fsleep syz-executor.0 28604 296148 78413 0 3 0x4000080 fsleep syz-executor.0 93249 414507 0 0 3 0x14200 bored sosplice 79185 510073 49515 0 2 0x482 syz-executor.1 78413 252546 49515 0 3 0x82 nanosleep syz-executor.0 49515 290624 86871 0 3 0x82 thrsleep syz-fuzzer 49515 427151 86871 0 3 0x4000082 thrsleep syz-fuzzer 49515 301932 86871 0 3 0x4000082 thrsleep syz-fuzzer 49515 237160 86871 0 3 0x4000082 thrsleep syz-fuzzer 49515 306039 86871 0 3 0x4000082 thrsleep syz-fuzzer 49515 200821 86871 0 3 0x4000082 thrsleep syz-fuzzer 49515 439233 86871 0 3 0x4000082 kqread syz-fuzzer 49515 492682 86871 0 3 0x4000082 thrsleep syz-fuzzer 49515 187107 86871 0 3 0x4000082 thrsleep syz-fuzzer 49515 268813 86871 0 3 0x4000082 thrsleep syz-fuzzer 86871 436358 37938 0 3 0x10008a pause ksh 37938 296239 49617 0 3 0x92 select sshd 84752 163849 1 0 3 0x100083 ttyin getty 49617 65914 1 0 3 0x80 select sshd 64826 38706 80508 74 3 0x100092 bpf pflogd 80508 449622 1 0 3 0x80 netio pflogd 6548 436130 42269 73 3 0x100090 kqread syslogd 42269 309345 1 0 3 0x100082 netio syslogd 61180 442935 1 77 3 0x100090 poll dhclient 11746 151006 1 0 3 0x80 poll dhclient 90721 425821 0 0 3 0x14200 bored smr 85370 162918 0 0 3 0x14200 pgzero zerothread 91645 323031 0 0 3 0x14200 aiodoned aiodoned 51600 391428 0 0 3 0x14200 syncer update 26582 291366 0 0 3 0x14200 cleaner cleaner 87207 443143 0 0 7 0x14200 reaper 33716 519956 0 0 3 0x14200 pgdaemon pagedaemon 34351 315255 0 0 3 0x14200 bored crynlk 78122 490215 0 0 3 0x14200 bored crypto 65682 44707 0 0 3 0x40014200 acpi0 acpi0 87908 479641 0 0 3 0x40014200 idle1 61540 205863 0 0 3 0x14200 bored softnet 70026 402136 0 0 3 0x14200 bored systqmp *21809 373529 0 0 7 0x14200 systq 60525 278532 0 0 3 0x40014200 bored softclock 28916 466275 0 0 3 0x40014200 idle0 1 403089 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 21809 (systq) thread 0xffff800020a18c30 (373529) exclusive rrwlock inode r = 0 (0xfffffd806f745810) #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 9501 6409K 6722K 78643K 10706 0 pcb 14 8K 8K 78643K 32 0 rtable 107 3K 3K 78643K 222 0 ifaddr 62 12K 12K 78643K 64 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1480 0 iov 0 0K 2K 78643K 10 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1252 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 12 0K 1K 78643K 28 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 85 0 sigio 0 0K 0K 78643K 7 0 proc 60 63K 95K 78643K 444 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 3 0 in_multi 33 2K 2K 78643K 38 0 ether_multi 1 0K 0K 78643K 3 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 31 148K 148K 78643K 31 0 exec 0 0K 1K 78643K 209 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 97 21K 37K 78643K 1168 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 6 0 NDP 10 0K 0K 78643K 14 0 temp 91 3038K 3102K 78643K 10370 0 kqueue 3 4K 8K 78643K 5 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 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 27 0 25 1 0 1 1 0 8 0 rtentry 112 49 0 4 2 0 2 2 0 8 0 unpcb 120 35 0 23 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 329 0 329 1 0 1 1 0 8 1 tcpcb 544 27 0 23 1 0 1 1 0 8 0 inpcb 280 87 0 79 2 0 2 2 0 8 1 rttmr 72 2 0 2 1 0 1 1 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 2 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 14 0 1 1 0 1 1 0 8 0 pfstkey 112 14 0 1 1 0 1 1 0 8 0 pfstate 328 14 0 1 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 256 200 0 6 13 0 13 13 0 8 0 art_table 32 201 0 6 2 0 2 2 0 8 0 art_node 16 48 0 7 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 1505 0 97 46 0 46 46 0 8 0 ffsino 272 1505 0 97 94 0 94 94 0 8 0 nchpl 144 1813 0 191 61 0 61 61 0 8 0 uvmvnodes 72 1571 0 0 29 0 29 29 0 8 0 vnodes 208 1571 0 0 83 0 83 83 0 8 0 namei 1024 4716 0 4716 1 0 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 192 5467 0 5467 6 1 5 5 0 8 5 plimitpl 152 24 0 16 1 0 1 1 0 8 0 sigapl 424 301 0 269 4 0 4 4 0 8 0 futexpl 56 950 0 948 1 0 1 1 0 8 0 knotepl 112 56 0 37 1 0 1 1 0 8 0 kqueuepl 144 9 0 6 1 0 1 1 0 8 0 pipelkpl 48 85 0 75 1 0 1 1 0 8 0 pipepl 120 170 0 151 1 0 1 1 0 8 0 fdescpl 496 285 0 269 3 0 3 3 0 8 0 filepl 152 1478 0 1371 5 0 5 5 0 8 0 lockfpl 104 26 0 25 1 0 1 1 0 8 0 lockfspl 48 9 0 8 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 58 0 49 1 0 1 1 0 8 0 zombiepl 144 269 0 268 1 0 1 1 0 8 0 processpl 984 301 0 268 5 0 5 5 0 8 0 procpl 624 426 0 382 5 0 5 5 0 8 1 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 400 149 0 127 3 0 3 3 0 8 0 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 173 0 0 21 0 21 21 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 213 0 0 13 0 13 13 0 8 0 bufpl 280 4211 0 173 289 0 289 289 0 8 0 anonpl 16 44089 0 30646 69 1 68 68 0 124 13 amapchunkpl 152 2263 0 2131 19 0 19 19 0 158 13 amappl16 192 1181 0 456 42 0 42 42 0 8 5 amappl15 184 52 0 48 2 1 1 1 0 8 0 amappl14 176 3 0 3 2 2 0 1 0 8 0 amappl13 168 25 0 24 1 0 1 1 0 8 0 amappl12 160 29 0 27 2 1 1 1 0 8 0 amappl11 152 68 0 50 1 0 1 1 0 8 0 amappl10 144 18 0 13 1 0 1 1 0 8 0 amappl9 136 390 0 386 1 0 1 1 0 8 0 amappl8 128 295 0 282 1 0 1 1 0 8 0 amappl7 120 121 0 109 1 0 1 1 0 8 0 amappl6 112 27 0 23 2 1 1 1 0 8 0 amappl5 104 188 0 169 1 0 1 1 0 8 0 amappl4 96 506 0 474 2 1 1 2 0 8 0 amappl3 88 107 0 101 1 0 1 1 0 8 0 amappl2 80 1416 0 1333 3 1 2 3 0 8 0 amappl1 72 16253 0 15780 26 13 13 20 0 8 3 amappl 80 672 0 628 2 0 2 2 0 84 1 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 24 285 0 268 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 285 0 268 1 0 1 1 0 8 0 vmmpekpl 168 6177 0 6142 2 0 2 2 0 8 0 vmmpepl 168 41577 0 39592 110 7 103 103 0 357 16 vmsppl 368 284 0 268 2 0 2 2 0 8 0 pdppl 4096 578 0 536 6 0 6 6 0 8 0 pvpl 32 146318 0 129659 165 0 165 165 0 265 28 pmappl 232 284 0 268 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 169 0 3 5 0 5 5 0 8 0