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 404371 37696 0 0x14000 0x200 1 reaper *345851 75965 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(fffffd8067d58428,1,fffffd807f7bf720,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8067dd6dc0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8067dd6dc0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8067dd6dc0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8067dd6dc0,0) 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(fffffd8067d58428,1,fffffd807f7bf720,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8067dd6dc0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8067dd6dc0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8067dd6dc0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8067dd6dc0,0) 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 0xffff800020a2d8f0 rbx 0xffff800020a2d9a0 rdx 0xffff800020a18ea0 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0x86f8e3f7ff1b2f0f r12 0x3000000008 r13 0xffff800020a2d900 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d8e0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=345851 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19110,0xffff800020a18760 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 14648 266132 63897 0 2 0 syz-executor.1 65461 489977 0 0 3 0x14200 bored sosplice 63897 65297 24370 0 3 0x82 nanosleep syz-executor.1 4194 319307 24370 0 2 0x482 syz-executor.0 24370 347012 72227 0 3 0x82 thrsleep syz-fuzzer 24370 155092 72227 0 3 0x4000082 nanosleep syz-fuzzer 24370 388961 72227 0 3 0x4000082 thrsleep syz-fuzzer 24370 197592 72227 0 3 0x4000082 thrsleep syz-fuzzer 24370 235282 72227 0 3 0x4000082 thrsleep syz-fuzzer 24370 89372 72227 0 3 0x4000082 kqread syz-fuzzer 24370 284183 72227 0 3 0x4000082 thrsleep syz-fuzzer 24370 386153 72227 0 2 0x4000482 syz-fuzzer 24370 43726 72227 0 3 0x4000082 thrsleep syz-fuzzer 24370 98611 72227 0 2 0x4000482 syz-fuzzer 24370 516641 72227 0 3 0x4000082 thrsleep syz-fuzzer 72227 70790 92942 0 3 0x10008a pause ksh 92942 430605 39884 0 3 0x92 select sshd 10124 345266 1 0 3 0x100083 ttyin getty 39884 10763 1 0 3 0x80 select sshd 75095 509105 21356 74 3 0x100092 bpf pflogd 21356 209017 1 0 3 0x80 netio pflogd 14547 435683 348 73 3 0x100090 kqread syslogd 348 105948 1 0 3 0x100082 netio syslogd 20148 441988 1 77 3 0x100090 poll dhclient 96865 373108 1 0 3 0x80 poll dhclient 3709 498071 0 0 3 0x14200 bored smr 9436 17186 0 0 2 0x14200 zerothread 88144 246644 0 0 3 0x14200 aiodoned aiodoned 79303 349205 0 0 3 0x14200 syncer update 22846 280903 0 0 3 0x14200 cleaner cleaner 37696 404371 0 0 7 0x14200 reaper 52237 419050 0 0 3 0x14200 pgdaemon pagedaemon 58241 87103 0 0 3 0x14200 bored crynlk 61379 87766 0 0 3 0x14200 bored crypto 4895 42651 0 0 3 0x40014200 acpi0 acpi0 91169 336019 0 0 3 0x40014200 idle1 6039 324899 0 0 3 0x14200 bored softnet 26670 438512 0 0 3 0x14200 bored systqmp *75965 345851 0 0 7 0x14200 systq 67069 519339 0 0 3 0x40014200 bored softclock 98001 477147 0 0 3 0x40014200 idle0 1 399575 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 75965 (systq) thread 0xffff800020a18ea0 (345851) exclusive rrwlock inode r = 0 (0xfffffd80645f53d0) #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 9546 6429K 7636K 78643K 14557 0 pcb 13 8K 8K 78643K 110 0 rtable 71 3K 4K 78643K 1625 0 ifaddr 88 18K 21K 78643K 1134 0 counters 43 33K 34K 78643K 495 0 ioctlops 0 0K 4K 78643K 1510 0 iov 0 0K 32K 78643K 70 0 mount 1 1K 1K 78643K 1 0 vnodes 1225 77K 77K 78643K 2604 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 0K 78643K 49 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 779 0 sigio 0 0K 0K 78643K 14 0 proc 61 63K 83K 78643K 499 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 34 0 in_multi 44 2K 3K 78643K 98 0 ether_multi 1 0K 0K 78643K 16 0 mrt 0 0K 0K 78643K 2 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 255 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 117 70K 87K 78643K 3371 0 UVM aobj 16 2K 2K 78643K 17 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 77 0 NDP 17 0K 0K 78643K 248 0 temp 142 3047K 3114K 78643K 10991 0 kqueue 3 4K 10K 78643K 23 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 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 56 0 54 1 0 1 1 0 8 0 rtentry 112 51 0 27 2 0 2 2 0 8 0 unpcb 120 344 0 334 1 0 1 1 0 8 0 syncache 264 9 0 9 3 2 1 1 0 8 1 tcpqe 32 54 0 54 3 2 1 1 0 8 1 tcpcb 544 179 0 173 1 0 1 1 0 8 0 inpcb 280 1178 0 1169 3 1 2 2 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 7 0 4 1 0 1 1 0 8 0 pffrag 232 3 0 3 1 0 1 1 0 482 1 pffrnode 88 3 0 3 1 0 1 1 0 8 1 pffrent 40 49 0 49 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 43 0 15 1 0 1 1 0 8 0 pfstkey 112 43 0 15 1 0 1 1 0 8 0 pfstate 328 43 0 15 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 256 230 0 127 12 1 11 12 0 8 2 art_table 32 231 0 127 2 0 2 2 0 8 0 art_node 16 50 0 31 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 7 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 47 0 37 1 0 1 1 0 8 0 shmpl 112 15 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3249 0 1843 46 0 46 46 0 8 0 ffsino 272 3249 0 1843 95 0 95 95 0 8 0 nchpl 144 4309 0 2701 61 0 61 61 0 8 0 uvmvnodes 72 4149 0 0 76 0 76 76 0 8 0 vnodes 208 4149 0 0 219 0 219 219 0 8 0 namei 1024 11851 0 11851 1 0 1 1 0 8 1 percpumem 16 258 0 226 1 0 1 1 0 8 0 vcpupl 1984 6 0 0 1 0 1 1 0 8 0 vmpool 560 10 0 4 1 0 1 1 0 8 0 scxspl 192 12290 0 12290 9 8 1 6 0 8 1 plimitpl 152 54 0 46 1 0 1 1 0 8 0 sigapl 424 995 0 963 4 0 4 4 0 8 0 futexpl 56 10659 0 10659 1 0 1 1 0 8 1 knotepl 112 84 0 65 1 0 1 1 0 8 0 kqueuepl 144 92 0 90 1 0 1 1 0 8 0 pipelkpl 48 127 0 117 1 0 1 1 0 8 0 pipepl 120 254 0 235 1 0 1 1 0 8 0 fdescpl 496 979 0 963 3 0 3 3 0 8 0 filepl 152 5894 0 5793 6 1 5 6 0 8 1 lockfpl 104 105 0 104 1 0 1 1 0 8 0 lockfspl 48 43 0 42 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 96 397 0 388 1 0 1 1 0 8 0 zombiepl 144 963 0 962 1 0 1 1 0 8 0 processpl 984 995 0 962 5 0 5 5 0 8 0 procpl 624 2580 0 2537 4 0 4 4 0 8 0 srpgc 64 2 0 2 1 0 1 1 0 8 1 sosppl 128 10 0 10 2 1 1 1 0 8 1 sockpl 400 1581 0 1560 6 2 4 5 0 8 1 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 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 mcl2k 2048 154 0 0 19 1 18 19 0 8 0 mtagpl 80 18 0 0 1 0 1 1 0 8 0 mbufpl 256 384 0 0 21 0 21 21 0 8 0 bufpl 280 5387 0 179 372 0 372 372 0 8 0 anonpl 16 105485 0 91154 82 19 63 74 0 124 4 amapchunkpl 152 5136 0 4995 11 4 7 9 0 158 0 amappl16 192 5186 0 4399 71 31 40 51 0 8 0 amappl15 184 2 0 0 1 0 1 1 0 8 0 amappl14 176 751 0 746 2 1 1 1 0 8 0 amappl13 168 25 0 24 1 0 1 1 0 8 0 amappl12 160 3 0 2 2 1 1 1 0 8 0 amappl11 152 70 0 52 1 0 1 1 0 8 0 amappl10 144 18 0 12 1 0 1 1 0 8 0 amappl9 136 386 0 383 1 0 1 1 0 8 0 amappl8 128 306 0 289 1 0 1 1 0 8 0 amappl7 120 122 0 109 1 0 1 1 0 8 0 amappl6 112 26 0 21 1 0 1 1 0 8 0 amappl5 104 629 0 613 1 0 1 1 0 8 0 amappl4 96 765 0 730 2 1 1 2 0 8 0 amappl3 88 384 0 377 1 0 1 1 0 8 0 amappl2 80 6903 0 6828 3 1 2 3 0 8 0 amappl1 72 30130 0 29680 25 15 10 20 0 8 0 amappl 80 2843 0 2795 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 16 0 1 1 0 1 1 0 8 0 uaddrrnd 24 989 0 966 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 989 0 966 1 0 1 1 0 8 0 vmmpekpl 168 9568 0 9530 2 0 2 2 0 8 0 vmmpepl 168 123369 0 121343 119 28 91 101 0 357 2 vmsppl 368 988 0 966 3 0 3 3 0 8 1 pdppl 4096 1986 0 1938 7 0 7 7 0 8 0 pvpl 32 307014 0 289702 188 19 169 180 0 265 27 pmappl 232 988 0 966 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 183 0 7 6 0 6 6 0 8 0