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 311449 60050 0 0x14000 0x200 0 reaper *128744 274 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(fffffd807eb7c1b0,3,fffffd807f7bfae0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80675d4740,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80675d4740,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80675d4740,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80675d4740,0) 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(fffffd807eb7c1b0,3,fffffd807f7bfae0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80675d4740,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80675d4740,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80675d4740,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80675d4740,0) 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 0xffff800020a2d4c0 rbx 0xffff800020a2d570 rdx 0xffff800020a19110 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0xa9b6f182b153e46e r12 0x3000000008 r13 0xffff800020a2d4d0 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d4b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=128744 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19380,0xffff800020a18760 process=0xffff800020a1a000 user=0xffff800020a28000, vmspace=0xffffffff82648778 estcpu=0, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 83222 172922 13023 0 3 0x80 nanosleep syz-executor.1 83222 462053 13023 0 3 0x4000080 pipewr syz-executor.1 83222 327884 13023 0 3 0x4000080 fsleep syz-executor.1 14755 477130 0 0 3 0x14200 bored sosplice 13023 358812 60538 0 3 0x82 nanosleep syz-executor.1 28102 482804 60538 0 3 0x82 nanosleep syz-executor.0 60538 446125 34962 0 3 0x82 thrsleep syz-fuzzer 60538 329494 34962 0 3 0x4000082 thrsleep syz-fuzzer 60538 23852 34962 0 3 0x4000082 thrsleep syz-fuzzer 60538 359261 34962 0 3 0x4000082 thrsleep syz-fuzzer 60538 479606 34962 0 3 0x4000082 thrsleep syz-fuzzer 60538 26119 34962 0 3 0x4000082 thrsleep syz-fuzzer 60538 491222 34962 0 3 0x4000082 thrsleep syz-fuzzer 60538 132552 34962 0 3 0x4000082 thrsleep syz-fuzzer 60538 429282 34962 0 3 0x4000082 thrsleep syz-fuzzer 60538 164393 34962 0 3 0x4000082 kqread syz-fuzzer 34962 274354 80413 0 3 0x10008a pause ksh 80413 276873 66407 0 3 0x92 select sshd 13967 134828 1 0 3 0x100083 ttyopn getty 66407 90764 1 0 3 0x80 select sshd 55652 290397 2985 74 3 0x100092 bpf pflogd 2985 517080 1 0 3 0x80 netio pflogd 40632 169076 44580 73 3 0x100090 kqread syslogd 44580 273774 1 0 3 0x100082 netio syslogd 63863 21433 1 77 3 0x100090 poll dhclient 43326 190090 1 0 3 0x80 poll dhclient 58211 366257 0 0 3 0x14200 bored smr 22616 116897 0 0 3 0x14200 pgzero zerothread 5535 244568 0 0 3 0x14200 aiodoned aiodoned 24287 417495 0 0 3 0x14200 syncer update 13890 448658 0 0 3 0x14200 cleaner cleaner 60050 311449 0 0 7 0x14200 reaper 61542 139106 0 0 3 0x14200 pgdaemon pagedaemon 14795 90827 0 0 3 0x14200 bored crynlk 1249 232113 0 0 3 0x14200 bored crypto 40653 44277 0 0 3 0x40014200 acpi0 acpi0 19080 491898 0 0 3 0x40014200 idle1 53089 387640 0 0 3 0x14200 bored softnet 75377 469228 0 0 3 0x14200 bored systqmp * 274 128744 0 0 7 0x14200 systq 84657 326053 0 0 3 0x40014200 bored softclock 5022 320197 0 0 3 0x40014200 idle0 1 143932 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 274 (systq) thread 0xffff800020a19110 (128744) exclusive rrwlock inode r = 0 (0xfffffd807abab0a8) #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 9506 6416K 7122K 78643K 11521 0 pcb 13 8K 8K 78643K 84 0 rtable 108 4K 4K 78643K 263 0 ifaddr 69 14K 14K 78643K 99 0 counters 43 33K 34K 78643K 51 0 ioctlops 0 0K 4K 78643K 1489 0 iov 0 0K 12K 78643K 33 0 mount 1 1K 1K 78643K 1 0 vnodes 1217 77K 77K 78643K 1493 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 55 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 481 0 proc 63 63K 95K 78643K 461 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 55 0 in_multi 59 3K 3K 78643K 96 0 ether_multi 1 0K 0K 78643K 5 0 mrt 0 0K 0K 78643K 1 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 224 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 106 54K 55K 78643K 2268 0 UVM aobj 18 2K 2K 78643K 18 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 42 0 NDP 10 0K 0K 78643K 18 0 temp 91 3041K 3105K 78643K 7456 0 kqueue 3 4K 18K 78643K 26 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 8 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 33 0 31 1 0 1 1 0 8 0 rtentry 112 50 0 6 2 0 2 2 0 8 0 unpcb 120 149 0 137 1 0 1 1 0 8 0 syncache 264 23 0 23 2 1 1 1 0 8 1 tcpqe 32 130 0 130 1 0 1 1 0 8 1 tcpcb 544 200 0 194 1 0 1 1 0 8 0 inpcb 280 476 0 467 2 0 2 2 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 ppxss 1128 1 0 1 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 29 0 5 1 0 1 1 0 8 0 pfstkey 112 29 0 5 1 0 1 1 0 8 0 pfstate 328 29 0 5 3 0 3 3 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 256 197 0 3 13 0 13 13 0 8 0 art_table 32 199 0 3 2 0 2 2 0 8 0 art_node 16 49 0 10 1 0 1 1 0 8 0 semapl 112 48 0 38 1 0 1 1 0 8 0 shmpl 112 16 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2056 0 651 46 0 46 46 0 8 0 ffsino 272 2056 0 651 94 0 94 94 0 8 0 nchpl 144 2801 0 1178 61 0 61 61 0 8 0 uvmvnodes 72 2302 0 0 42 0 42 42 0 8 0 vnodes 208 2302 0 0 122 0 122 122 0 8 0 namei 1024 7329 0 7329 1 0 1 1 0 8 1 percpumem 16 36 0 4 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 6 0 2 1 0 1 1 0 8 0 scxspl 192 8566 0 8566 9 8 1 7 0 8 1 plimitpl 152 37 0 29 1 0 1 1 0 8 0 sigapl 424 702 0 670 4 0 4 4 0 8 0 futexpl 56 3889 0 3888 1 0 1 1 0 8 0 knotepl 112 77 0 58 1 0 1 1 0 8 0 kqueuepl 144 77 0 75 1 0 1 1 0 8 0 pipelkpl 48 85 0 74 1 0 1 1 0 8 0 pipepl 120 170 0 149 1 0 1 1 0 8 0 fdescpl 496 681 0 665 3 0 3 3 0 8 0 filepl 152 3020 0 2916 5 0 5 5 0 8 0 lockfpl 104 85 0 84 1 0 1 1 0 8 0 lockfspl 48 28 0 27 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 23 0 12 1 0 1 1 0 8 0 ucredpl 96 363 0 354 1 0 1 1 0 8 0 zombiepl 144 670 0 669 1 0 1 1 0 8 0 processpl 984 702 0 669 5 0 5 5 0 8 0 procpl 624 1499 0 1455 4 0 4 4 0 8 0 sosppl 128 10 0 9 1 0 1 1 0 8 0 sockpl 400 661 0 638 4 0 4 4 0 8 1 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 150 0 0 18 0 18 18 0 8 0 mtagpl 80 58 0 0 2 0 2 2 0 8 0 mbufpl 256 475 0 0 30 0 30 30 0 8 0 bufpl 280 13087 0 6820 448 0 448 448 0 8 0 anonpl 16 95210 0 82424 87 2 85 85 0 124 32 amapchunkpl 152 3313 0 3168 8 0 8 8 0 158 0 amappl16 192 4591 0 3906 61 19 42 59 0 8 7 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 3 0 2 2 1 1 1 0 8 0 amappl13 168 25 0 24 1 0 1 1 0 8 0 amappl12 160 235 0 232 1 0 1 1 0 8 0 amappl11 152 80 0 61 1 0 1 1 0 8 0 amappl10 144 252 0 243 1 0 1 1 0 8 0 amappl9 136 387 0 384 1 0 1 1 0 8 0 amappl8 128 296 0 286 1 0 1 1 0 8 0 amappl7 120 344 0 331 1 0 1 1 0 8 0 amappl6 112 27 0 21 1 0 1 1 0 8 0 amappl5 104 802 0 784 1 0 1 1 0 8 0 amappl4 96 502 0 474 1 0 1 1 0 8 0 amappl3 88 106 0 99 1 0 1 1 0 8 0 amappl2 80 4516 0 4438 3 1 2 3 0 8 0 amappl1 72 23257 0 22784 25 15 10 20 0 8 0 amappl 80 1763 0 1711 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 17 0 0 1 0 1 1 0 8 0 uaddrrnd 24 687 0 666 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 687 0 666 1 0 1 1 0 8 0 vmmpekpl 168 8026 0 7989 2 0 2 2 0 8 0 vmmpepl 168 88685 0 86736 113 7 106 106 0 357 21 vmsppl 368 686 0 666 2 0 2 2 0 8 0 pdppl 4096 1382 0 1336 6 0 6 6 0 8 0 pvpl 32 259842 0 244324 204 1 203 203 0 265 77 pmappl 232 686 0 666 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 187 0 3 6 0 6 6 0 8 0