panic: kernel diagnostic assertion "p == curproc" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_vops.c", line 169 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *191781 96191 0 0x14000 0x200 0 systq db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821d5d2f) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff8222900d,ffffffff8225c86f,a9,ffffffff82208fd2) at __assert+0x2b sys/kern/subr_prf.c:154 VOP_CLOSE(fffffd80574e9500,43,fffffd806c3bf960,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8059bd7e20,0) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8059bd7e20,0) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd8059bd7e20,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8059bd7e20,0) at closef+0x117 sys/kern/kern_descrip.c:1260 unp_gc(0) at unp_gc+0x172 sys/kern/uipc_usrreq.c:944 taskq_thread(ffffffff824bcfd0) at taskq_thread+0x52 sys/kern/kern_task.c:370 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic kernel diagnostic assertion "p == curproc" failed: file "/syzkaller/managers/main/kernel/sys/kern/vfs_vops.c", line 169 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821d5d2f) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff8222900d,ffffffff8225c86f,a9,ffffffff82208fd2) at __assert+0x2b sys/kern/subr_prf.c:154 VOP_CLOSE(fffffd80574e9500,43,fffffd806c3bf960,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8059bd7e20,0) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8059bd7e20,0) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd8059bd7e20,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8059bd7e20,0) at closef+0x117 sys/kern/kern_descrip.c:1260 unp_gc(0) at unp_gc+0x172 sys/kern/uipc_usrreq.c:944 taskq_thread(ffffffff824bcfd0) at taskq_thread+0x52 sys/kern/kern_task.c:370 end trace frame: 0x0, count: -9 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d2fc180 rbx 0xffff80001d2fc230 rdx 0x2 rcx 0 rax 0 r8 0xffff80001d2fc140 r9 0x1 r10 0 r11 0xe8d79c8ea4d3e6ce r12 0x3000000008 r13 0xffff80001d2fc190 r14 0x100 r15 0x1 rip 0xffffffff813787c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d2fc170 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (systq) pid=191781 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001d2e2110,0xffff80001d2e1760 process=0xffff8000ffffe398 user=0xffff80001d2f7000, vmspace=0xffffffff82589be8 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 78061 152476 43576 0 3 0x82 nanosleep syz-executor.1 42898 486954 43576 0 3 0x82 nanosleep syz-executor.0 43576 401675 16627 0 3 0x82 thrsleep syz-fuzzer 43576 431738 16627 0 3 0x4000082 thrsleep syz-fuzzer 43576 301344 16627 0 3 0x4000082 kqread syz-fuzzer 43576 158439 16627 0 3 0x4000082 thrsleep syz-fuzzer 43576 356520 16627 0 3 0x4000082 thrsleep syz-fuzzer 43576 286855 16627 0 3 0x4000082 thrsleep syz-fuzzer 43576 56503 16627 0 3 0x4000082 thrsleep syz-fuzzer 16627 55723 49592 0 3 0x10008a pause ksh 49592 195899 62036 0 3 0x92 select sshd 35812 206322 1 0 3 0x100083 ttyin getty 62036 271721 1 0 3 0x80 select sshd 83270 490877 27430 73 3 0x100090 kqread syslogd 27430 186536 1 0 3 0x100082 netio syslogd 70378 36478 1 77 3 0x100090 poll dhclient 35756 400022 1 0 3 0x80 poll dhclient 87049 73567 0 0 3 0x14200 bored smr 13451 135730 0 0 2 0x14200 zerothread 37758 45171 0 0 3 0x14200 aiodoned aiodoned 12414 80829 0 0 3 0x14200 syncer update 57752 61244 0 0 3 0x14200 cleaner cleaner 67836 76039 0 0 3 0x14200 reaper reaper 5060 281461 0 0 3 0x14200 pgdaemon pagedaemon 98920 230053 0 0 3 0x14200 bored crynlk 25971 478654 0 0 3 0x14200 bored crypto 6798 309928 0 0 3 0x40014200 acpi0 acpi0 84273 133773 0 0 3 0x14200 bored softnet 96381 430537 0 0 3 0x14200 bored systqmp *96191 191781 0 0 7 0x14200 systq 33353 254395 0 0 2 0x40014200 softclock 40607 277997 0 0 3 0x40014200 idle0 1 44125 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9458 6453K 6776K 78643K 10634 0 pcb 13 8K 8K 78643K 24 0 rtable 103 3K 3K 78643K 211 0 ifaddr 39 10K 10K 78643K 48 0 counters 21 16K 16K 78643K 22 0 ioctlops 0 0K 2K 78643K 19 0 iov 0 0K 2K 78643K 2 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1242 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 0K 0K 78643K 2 0 sem 6 0K 0K 78643K 8 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 4 9K 25K 78643K 61 0 sigio 0 0K 0K 78643K 2 0 proc 48 38K 63K 78643K 364 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 9 0 in_multi 33 2K 2K 78643K 40 0 ether_multi 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 25 122K 122K 78643K 25 0 exec 0 0K 1K 78643K 185 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 87 20K 21K 78643K 962 0 UVM aobj 5 2K 2K 78643K 5 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 10 0 NDP 5 0K 0K 78643K 10 0 temp 68 3029K 3093K 78643K 1907 0 kqueue 3 4K 4K 78643K 3 0 SYN cache 2 16K 16K 78643K 2 0 ddb> 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 rtpcb 80 23 0 21 1 0 1 1 0 8 0 rtentry 112 49 0 6 2 0 2 2 0 8 0 unpcb 120 99 0 89 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 9 0 9 1 1 0 1 0 8 0 tcpcb 544 19 0 15 1 0 1 1 0 8 0 inpcb 280 79 0 72 2 0 2 2 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 190 0 3 12 0 12 12 0 8 0 art_table 32 191 0 3 2 0 2 2 0 8 0 art_node 16 48 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 4 0 0 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1452 0 51 46 0 46 46 0 8 0 ffsino 240 1452 0 51 83 0 83 83 0 8 0 nchpl 144 1718 0 106 60 0 60 60 0 8 0 uvmvnodes 72 1513 0 0 28 0 28 28 0 8 0 vnodes 208 1513 0 0 80 0 80 80 0 8 0 namei 1024 4114 0 4114 1 0 1 1 0 8 1 scxspl 192 4864 0 4864 1 0 1 1 0 8 1 plimitpl 152 18 0 11 1 0 1 1 0 8 0 sigapl 424 247 0 220 4 0 4 4 0 8 0 futexpl 56 781 0 781 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 16 77 0 67 1 0 1 1 0 8 0 pipepl 120 154 0 135 1 0 1 1 0 8 0 fdescpl 432 233 0 220 2 0 2 2 0 8 0 filepl 120 1234 0 1136 4 0 4 4 0 8 0 lockfpl 104 32 0 31 1 0 1 1 0 8 0 lockfspl 48 16 0 15 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 17 0 7 1 0 1 1 0 8 0 ucredpl 96 55 0 48 1 0 1 1 0 8 0 zombiepl 144 220 0 218 1 0 1 1 0 8 0 processpl 920 247 0 218 4 0 4 4 0 8 0 procpl 624 302 0 267 4 0 4 4 0 8 0 sockpl 400 201 0 182 4 0 4 4 0 8 1 mcl64k 65536 14 0 14 1 0 1 1 0 8 1 mcl12k 12288 4 0 4 1 0 1 1 0 8 1 mcl8k 8192 5 0 5 1 0 1 1 0 8 1 mcl4k 4096 14 0 14 2 1 1 1 0 8 1 mcl2k 2048 57958 0 57911 19 4 15 15 0 8 8 mtagpl 80 9 0 2 2 1 1 1 0 8 0 mbufpl 256 92403 0 92308 14 2 12 12 0 8 1 bufpl 280 4016 0 160 276 0 276 276 0 8 0 anonpl 16 36192 0 22636 58 2 56 56 0 107 0 amapchunkpl 152 1130 0 991 8 0 8 8 0 158 2 amappl16 192 962 0 226 38 0 38 38 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 3 0 1 2 1 1 1 0 8 0 amappl13 168 23 0 22 1 0 1 1 0 8 0 amappl12 160 17 0 16 2 1 1 1 0 8 0 amappl11 152 90 0 76 1 0 1 1 0 8 0 amappl10 144 14 0 10 1 0 1 1 0 8 0 amappl9 136 381 0 378 1 0 1 1 0 8 0 amappl8 128 258 0 248 1 0 1 1 0 8 0 amappl7 120 106 0 96 1 0 1 1 0 8 0 amappl6 112 49 0 43 1 0 1 1 0 8 0 amappl5 104 149 0 139 1 0 1 1 0 8 0 amappl4 96 447 0 416 2 1 1 2 0 8 0 amappl3 88 109 0 103 1 0 1 1 0 8 0 amappl2 80 1064 0 1009 3 1 2 3 0 8 0 amappl1 72 13882 0 13491 26 13 13 20 0 8 4 amappl 80 524 0 484 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 233 0 220 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 233 0 220 1 0 1 1 0 8 0 vmmpekpl 168 5792 0 5766 2 0 2 2 0 8 0 vmmpepl 168 35301 0 33633 102 5 97 97 0 357 19 vmsppl 272 232 0 220 2 0 2 2 0 8 1 pdppl 4096 472 0 440 6 0 6 6 0 8 1 pvpl 32 127814 0 111386 136 0 136 136 0 265 1 pmappl 200 232 0 220 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 156 0 9 5 0 5 5 0 8 0