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 523382 95141 0 0 0 0 syz-executor.0 *260568 49255 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(fffffd8064a10910,1,fffffd807f7bfba0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806839de58,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806839de58,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806839de58,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806839de58,0) 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(fffffd8064a10910,1,fffffd807f7bfba0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806839de58,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806839de58,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806839de58,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806839de58,0) 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 0xffff800020a2d490 rbx 0xffff800020a2d540 rdx 0xffff800020a18000 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0x1eb520c334eed129 r12 0x3000000008 r13 0xffff800020a2d4a0 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d480 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=260568 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a184e0,0xffff800020a18280 process=0xffff800020a1a3d8 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 95141 523382 96895 0 7 0 syz-executor.0 49023 450838 1 0 3 0x100083 ttyin getty 96895 260790 38136 0 3 0x82 nanosleep syz-executor.0 37746 328798 0 0 3 0x14200 bored sosplice 11369 342839 38136 0 3 0x82 nanosleep syz-executor.1 38136 329845 78163 0 3 0x82 thrsleep syz-fuzzer 38136 304471 78163 0 3 0x4000082 nanosleep syz-fuzzer 38136 308191 78163 0 3 0x4000082 thrsleep syz-fuzzer 38136 457964 78163 0 3 0x4000082 thrsleep syz-fuzzer 38136 283692 78163 0 3 0x4000082 thrsleep syz-fuzzer 38136 234060 78163 0 3 0x4000082 thrsleep syz-fuzzer 38136 238113 78163 0 3 0x4000082 thrsleep syz-fuzzer 38136 423358 78163 0 3 0x4000082 thrsleep syz-fuzzer 38136 224276 78163 0 3 0x4000082 thrsleep syz-fuzzer 38136 489305 78163 0 3 0x4000082 kqread syz-fuzzer 78163 342663 31147 0 3 0x10008a pause ksh 31147 335589 19912 0 3 0x92 select sshd 19912 9255 1 0 3 0x80 select sshd 71884 384898 73537 74 3 0x100092 bpf pflogd 73537 368962 1 0 3 0x80 netio pflogd 62155 85661 63511 73 3 0x100090 kqread syslogd 63511 379213 1 0 3 0x100082 netio syslogd 58890 292216 1 77 3 0x100090 poll dhclient 285 448444 1 0 3 0x80 poll dhclient 52956 363208 0 0 3 0x14200 bored smr 37870 445160 0 0 2 0x14200 zerothread 38242 65859 0 0 3 0x14200 aiodoned aiodoned 48073 475289 0 0 3 0x14200 syncer update 80183 253667 0 0 3 0x14200 cleaner cleaner 29544 443523 0 0 3 0x14200 reaper reaper 96147 81818 0 0 3 0x14200 pgdaemon pagedaemon 89329 502429 0 0 3 0x14200 bored crynlk 70191 436832 0 0 3 0x14200 bored crypto 99054 11750 0 0 3 0x40014200 acpi0 acpi0 93479 107147 0 0 3 0x40014200 idle1 50708 127654 0 0 3 0x14200 bored softnet 28969 212580 0 0 3 0x14200 bored systqmp *49255 260568 0 0 7 0x14200 systq 25781 338801 0 0 3 0x40014200 bored softclock 94597 80542 0 0 3 0x40014200 idle0 1 36153 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 49255 (systq) thread 0xffff800020a18000 (260568) exclusive rrwlock inode r = 0 (0xfffffd80649bfc50) #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 9491 6412K 6994K 78643K 11438 0 pcb 13 8K 8K 78643K 72 0 rtable 105 3K 3K 78643K 302 0 ifaddr 73 16K 16K 78643K 102 0 counters 43 33K 34K 78643K 53 0 ioctlops 0 0K 4K 78643K 1484 0 iov 0 0K 12K 78643K 22 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1498 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 10 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 15 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 635 0 proc 63 63K 83K 78643K 493 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 63 0 in_multi 95 4K 4K 78643K 143 0 ether_multi 1 0K 0K 78643K 13 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 239 0 pfkey data 0 0K 1K 78643K 5 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 101 21K 38K 78643K 2477 0 UVM aobj 12 2K 2K 78643K 12 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 52 0 NDP 8 0K 0K 78643K 19 0 temp 115 3045K 3109K 78643K 6593 0 kqueue 3 4K 14K 78643K 38 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 65 0 63 1 0 1 1 0 8 0 rtentry 112 56 0 12 2 0 2 2 0 8 0 unpcb 120 189 0 177 1 0 1 1 0 8 0 syncache 264 11 0 11 2 2 0 1 0 8 0 tcpqe 32 44 0 44 1 1 0 1 0 8 0 tcpcb 544 153 0 143 1 0 1 1 0 8 0 inpcb 280 425 0 412 2 0 2 2 0 8 0 nd6 48 9 0 3 1 0 1 1 0 8 0 pkpcb 40 5 0 5 1 0 1 1 0 8 1 pffrag 232 2 0 2 1 0 1 1 0 482 1 pffrnode 88 2 0 2 1 0 1 1 0 8 1 pffrent 40 90 0 90 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 26 0 5 1 0 1 1 0 8 0 pfstkey 112 26 0 5 1 0 1 1 0 8 0 pfstate 328 26 0 5 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 256 233 0 44 12 0 12 12 0 8 0 art_table 32 234 0 44 2 0 2 2 0 8 0 art_node 16 55 0 15 1 0 1 1 0 8 0 sysvmsgpl 40 37 0 36 1 0 1 1 0 8 0 semapl 112 13 0 3 1 0 1 1 0 8 0 shmpl 112 10 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2198 0 791 46 0 46 46 0 8 0 ffsino 272 2198 0 791 95 0 95 95 0 8 0 nchpl 144 3127 0 1522 61 1 60 61 0 8 0 uvmvnodes 72 2461 0 0 45 0 45 45 0 8 0 vnodes 208 2461 0 0 130 0 130 130 0 8 0 namei 1024 7859 0 7859 1 0 1 1 0 8 1 percpumem 16 37 0 5 1 0 1 1 0 8 0 vmpool 560 5 0 5 1 1 0 1 0 8 0 scsiplug 64 4 0 4 1 0 1 1 0 8 1 scxspl 192 10320 0 10320 8 7 1 7 0 8 1 plimitpl 152 50 0 42 1 0 1 1 0 8 0 sigapl 424 849 0 817 4 0 4 4 0 8 0 futexpl 56 3966 0 3966 1 0 1 1 0 8 1 knotepl 112 117 0 98 1 0 1 1 0 8 0 kqueuepl 144 72 0 70 1 0 1 1 0 8 0 pipelkpl 48 107 0 97 1 0 1 1 0 8 0 pipepl 120 214 0 195 1 0 1 1 0 8 0 fdescpl 496 833 0 817 3 0 3 3 0 8 0 filepl 152 3144 0 3040 5 0 5 5 0 8 0 lockfpl 104 70 0 69 1 0 1 1 0 8 0 lockfspl 48 29 0 28 1 0 1 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 325 0 316 1 0 1 1 0 8 0 zombiepl 144 817 0 816 1 0 1 1 0 8 0 processpl 984 849 0 816 5 0 5 5 0 8 0 procpl 624 1650 0 1608 4 0 4 4 0 8 0 sosppl 128 18 0 17 1 0 1 1 0 8 0 sockpl 400 684 0 657 4 0 4 4 0 8 1 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 157 0 0 19 0 19 19 0 8 0 mtagpl 80 40 0 0 1 0 1 1 0 8 0 mbufpl 256 278 0 0 17 0 17 17 0 8 0 bufpl 280 5407 0 174 374 0 374 374 0 8 0 anonpl 16 76216 0 65028 48 2 46 47 0 124 0 amapchunkpl 152 3650 0 3519 12 5 7 11 0 158 0 amappl16 192 3312 0 2729 30 0 30 30 0 8 0 amappl15 184 51 0 50 1 0 1 1 0 8 0 amappl14 176 14 0 10 2 1 1 1 0 8 0 amappl13 168 277 0 273 1 0 1 1 0 8 0 amappl12 160 297 0 295 2 1 1 1 0 8 0 amappl11 152 82 0 63 1 0 1 1 0 8 0 amappl10 144 20 0 14 1 0 1 1 0 8 0 amappl9 136 392 0 388 1 0 1 1 0 8 0 amappl8 128 323 0 310 1 0 1 1 0 8 0 amappl7 120 128 0 115 1 0 1 1 0 8 0 amappl6 112 21 0 18 2 1 1 1 0 8 0 amappl5 104 773 0 758 1 0 1 1 0 8 0 amappl4 96 761 0 733 1 0 1 1 0 8 0 amappl3 88 361 0 352 1 0 1 1 0 8 0 amappl2 80 5720 0 5653 3 1 2 3 0 8 0 amappl1 72 25542 0 25117 25 15 10 20 0 8 0 amappl 80 1923 0 1881 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 11 0 0 1 0 1 1 0 8 0 uaddrrnd 24 838 0 822 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 838 0 822 1 0 1 1 0 8 0 vmmpekpl 168 9062 0 9032 2 0 2 2 0 8 0 vmmpepl 168 102703 0 101014 101 16 85 94 0 357 6 vmsppl 368 837 0 822 2 0 2 2 0 8 0 pdppl 4096 1684 0 1644 6 0 6 6 0 8 0 pvpl 32 272212 0 257902 128 7 121 125 0 265 1 pmappl 232 837 0 822 3 2 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 171 0 3 5 0 5 5 0 8 0