login: 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 297895 28119 0 0x14000 0x200 0 reaper *111343 71925 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(fffffd80767cf420,1,fffffd807f7bf8a0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8067df7ef0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8067df7ef0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8067df7ef0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8067df7ef0,0) 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(fffffd80767cf420,1,fffffd807f7bf8a0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8067df7ef0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8067df7ef0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8067df7ef0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8067df7ef0,0) 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 0xffff800020a2d180 rbx 0xffff800020a2d230 rdx 0xffff800020a19380 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0x934d6753ecd5be79 r12 0x3000000008 r13 0xffff800020a2d190 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d170 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=111343 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19860,0xffff800020a18eb0 process=0xffff800020a1a7b0 user=0xffff800020a28000, vmspace=0xffffffff82648778 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 50466 407947 84249 0 3 0x82 nanosleep syz-executor.1 86580 284914 84249 0 3 0x82 nanosleep syz-executor.0 84249 47272 91948 0 3 0x82 thrsleep syz-fuzzer 84249 30385 91948 0 3 0x4000082 thrsleep syz-fuzzer 84249 251381 91948 0 3 0x4000082 kqread syz-fuzzer 84249 345399 91948 0 3 0x4000082 thrsleep syz-fuzzer 84249 268915 91948 0 3 0x4000082 thrsleep syz-fuzzer 84249 489317 91948 0 3 0x4000082 thrsleep syz-fuzzer 84249 408550 91948 0 3 0x4000082 thrsleep syz-fuzzer 84249 385789 91948 0 3 0x4000082 thrsleep syz-fuzzer 84249 467173 91948 0 3 0x4000082 thrsleep syz-fuzzer 84249 222576 91948 0 3 0x4000082 thrsleep syz-fuzzer 91948 88915 54080 0 3 0x10008a pause ksh 54080 16206 66498 0 3 0x92 select sshd 63036 166495 1 0 3 0x100083 ttyin getty 66498 88999 1 0 3 0x80 select sshd 55353 292795 76695 74 3 0x100092 bpf pflogd 76695 346313 1 0 3 0x80 netio pflogd 44421 429586 31094 73 3 0x100090 kqread syslogd 31094 29621 1 0 3 0x100082 netio syslogd 36727 518653 1 77 3 0x100090 poll dhclient 76491 232674 1 0 3 0x80 poll dhclient 1774 265014 0 0 3 0x14200 bored smr 27411 470801 0 0 3 0x14200 pgzero zerothread 26210 488720 0 0 3 0x14200 aiodoned aiodoned 50700 448446 0 0 3 0x14200 syncer update 71385 82410 0 0 3 0x14200 cleaner cleaner 28119 297895 0 0 7 0x14200 reaper 80300 144004 0 0 3 0x14200 pgdaemon pagedaemon 43957 433179 0 0 3 0x14200 bored crynlk 59489 480799 0 0 3 0x14200 bored crypto 39142 456903 0 0 3 0x40014200 acpi0 acpi0 90110 208803 0 0 3 0x40014200 idle1 37650 318109 0 0 3 0x14200 bored softnet 94986 149123 0 0 3 0x14200 bored systqmp *71925 111343 0 0 7 0x14200 systq 59555 4314 0 0 3 0x40014200 bored softclock 59794 95118 0 0 3 0x40014200 idle0 1 246091 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807efffaf0) #0 witness_lock+0x4c5 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_do_remove+0x88 rcr3 machine/cpufunc.h:141 [inline] #3 pmap_do_remove+0x88 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:414 [inline] #3 pmap_do_remove+0x88 sys/arch/amd64/amd64/pmap.c:1756 #4 uvm_map_teardown+0x195 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #4 uvm_map_teardown+0x195 sys/uvm/uvm_map.c:2739 #5 uvmspace_free+0x86 sys/uvm/uvm_map.c:3646 #6 uvm_exit+0x29 sys/uvm/uvm_glue.c:297 #7 reaper+0x189 sys/kern/kern_exit.c:456 #8 proc_trampoline+0x1c Process 71925 (systq) thread 0xffff800020a19380 (111343) exclusive rrwlock inode r = 0 (0xfffffd806b43cd58) #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 9480 6527K 6527K 78643K 10572 0 pcb 13 8K 8K 78643K 13 0 rtable 105 3K 3K 78643K 199 0 ifaddr 44 10K 10K 78643K 45 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1469 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1224 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 4 0K 0K 78643K 4 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 4 9K 25K 78643K 40 0 proc 59 63K 95K 78643K 439 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 19 95K 95K 78643K 19 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 99 21K 21K 78643K 1032 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 10 0K 0K 78643K 10 0 temp 68 3035K 3099K 78643K 2064 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 19 0 17 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 33 0 21 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 265 0 265 2 0 2 2 0 8 2 tcpcb 544 26 0 22 2 0 2 2 0 8 1 inpcb 280 59 0 52 2 0 2 2 0 8 1 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 11 0 0 1 0 1 1 0 8 0 pfstkey 112 11 0 0 1 0 1 1 0 8 0 pfstate 328 11 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 256 189 0 0 12 0 12 12 0 8 0 art_table 32 190 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 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 1434 0 26 46 0 46 46 0 8 0 ffsino 272 1434 0 26 94 0 94 94 0 8 0 nchpl 144 1676 0 55 61 0 61 61 0 8 0 uvmvnodes 72 1480 0 0 27 0 27 27 0 8 0 vnodes 208 1480 0 0 78 0 78 78 0 8 0 namei 1024 4267 0 4267 1 0 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 192 4860 0 4860 2 1 1 2 0 8 1 plimitpl 152 15 0 7 1 0 1 1 0 8 0 sigapl 424 255 0 225 4 0 4 4 0 8 0 futexpl 56 138 0 138 1 0 1 1 0 8 1 knotepl 112 53 0 34 1 0 1 1 0 8 0 kqueuepl 144 4 0 2 1 0 1 1 0 8 0 pipelkpl 48 74 0 64 1 0 1 1 0 8 0 pipepl 120 148 0 129 1 0 1 1 0 8 0 fdescpl 496 240 0 225 3 0 3 3 0 8 0 filepl 152 1189 0 1085 5 0 5 5 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 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 45 0 36 1 0 1 1 0 8 0 zombiepl 144 225 0 223 1 0 1 1 0 8 0 processpl 984 255 0 223 5 0 5 5 0 8 1 procpl 624 279 0 236 4 0 4 4 0 8 0 sockpl 400 111 0 90 4 0 4 4 0 8 1 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 204 0 0 25 0 25 25 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 229 0 0 14 0 14 14 0 8 0 bufpl 280 4065 0 174 278 0 278 278 0 8 0 anonpl 16 35284 0 22913 52 1 51 51 0 124 1 amapchunkpl 152 1198 0 1059 8 0 8 8 0 158 1 amappl16 192 812 0 156 33 0 33 33 0 8 0 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 4 0 3 2 1 1 1 0 8 0 amappl13 168 41 0 36 1 0 1 1 0 8 0 amappl12 160 5 0 4 2 1 1 1 0 8 0 amappl11 152 72 0 54 1 0 1 1 0 8 0 amappl10 144 31 0 25 1 0 1 1 0 8 0 amappl9 136 386 0 383 1 0 1 1 0 8 0 amappl8 128 310 0 296 1 0 1 1 0 8 0 amappl7 120 120 0 109 1 0 1 1 0 8 0 amappl6 112 24 0 23 1 0 1 1 0 8 0 amappl5 104 143 0 127 1 0 1 1 0 8 0 amappl4 96 508 0 472 2 1 1 2 0 8 0 amappl3 88 103 0 98 1 0 1 1 0 8 0 amappl2 80 997 0 920 3 0 3 3 0 8 1 amappl1 72 15672 0 15207 26 10 16 20 0 8 6 amappl 80 539 0 492 1 0 1 1 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 240 0 224 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 240 0 224 1 0 1 1 0 8 0 vmmpekpl 168 5821 0 5786 2 0 2 2 0 8 0 vmmpepl 168 36034 0 34167 108 6 102 102 0 357 19 vmsppl 368 239 0 223 2 0 2 2 0 8 0 pdppl 4096 488 0 446 6 0 6 6 0 8 0 pvpl 32 127562 0 112145 130 1 129 129 0 265 3 pmappl 232 239 0 223 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 173 0 3 5 0 5 5 0 8 0