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 504256 326 0 0x14000 0x200 1 reaper *204488 90329 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(fffffd8068afb340,1,fffffd807f7bfae0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806cc3f270,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806cc3f270,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806cc3f270,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806cc3f270,0) 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(fffffd8068afb340,1,fffffd807f7bfae0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806cc3f270,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806cc3f270,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806cc3f270,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806cc3f270,0) 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 0xffff800020a2daf0 rbx 0xffff800020a2dba0 rdx 0xffff800020a19380 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0xdede222958090fe2 r12 0x3000000008 r13 0xffff800020a2db00 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2dae0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=204488 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a195f0,0xffff800020a18eb0 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 93499 329530 81988 0 2 0 syz-executor.0 93499 373262 81988 0 3 0x4000080 fsleep syz-executor.0 59025 268177 0 0 3 0x14200 acct acct 82734 349116 17785 0 3 0x82 nanosleep syz-executor.1 53597 513899 0 0 3 0x14200 bored sosplice 81988 28616 17785 0 2 0x482 syz-executor.0 17785 469457 90158 0 3 0x82 thrsleep syz-fuzzer 17785 351714 90158 0 3 0x4000082 thrsleep syz-fuzzer 17785 385174 90158 0 3 0x4000082 thrsleep syz-fuzzer 17785 329654 90158 0 3 0x4000082 thrsleep syz-fuzzer 17785 371033 90158 0 3 0x4000082 thrsleep syz-fuzzer 17785 57268 90158 0 3 0x4000082 thrsleep syz-fuzzer 17785 236578 90158 0 3 0x4000082 thrsleep syz-fuzzer 17785 232274 90158 0 3 0x4000082 thrsleep syz-fuzzer 17785 2526 90158 0 3 0x4000082 thrsleep syz-fuzzer 17785 13399 90158 0 3 0x4000082 kqread syz-fuzzer 90158 46396 33868 0 3 0x10008a pause ksh 33868 369247 10726 0 3 0x92 select sshd 67127 210087 1 0 3 0x100083 ttyin getty 10726 261383 1 0 3 0x80 select sshd 34764 375628 4026 74 3 0x100092 bpf pflogd 4026 239155 1 0 3 0x80 netio pflogd 87168 492028 73099 73 3 0x100090 kqread syslogd 73099 355074 1 0 3 0x100082 netio syslogd 67173 292042 1 77 3 0x100090 poll dhclient 36976 303810 1 0 3 0x80 poll dhclient 13728 79168 0 0 3 0x14200 bored smr 99571 147155 0 0 2 0x14200 zerothread 44121 290999 0 0 3 0x14200 aiodoned aiodoned 42633 421985 0 0 3 0x14200 syncer update 90553 456786 0 0 3 0x14200 cleaner cleaner 326 504256 0 0 7 0x14200 reaper 53986 236662 0 0 3 0x14200 pgdaemon pagedaemon 50157 400478 0 0 3 0x14200 bored crynlk 73596 173993 0 0 3 0x14200 bored crypto 12972 333790 0 0 3 0x40014200 acpi0 acpi0 70227 336083 0 0 3 0x40014200 idle1 41083 517673 0 0 3 0x14200 bored softnet 81012 265195 0 0 3 0x14200 bored systqmp *90329 204488 0 0 7 0x14200 systq 32047 52995 0 0 3 0x40014200 bored softclock 71127 422905 0 0 3 0x40014200 idle0 1 28060 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 90329 (systq) thread 0xffff800020a19380 (204488) exclusive rrwlock inode r = 0 (0xfffffd80681a21b0) #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 9532 6558K 6941K 78643K 11519 0 pcb 13 8K 8K 78643K 67 0 rtable 79 2K 3K 78643K 322 0 ifaddr 77 15K 15K 78643K 128 0 counters 43 33K 34K 78643K 57 0 ioctlops 0 0K 4K 78643K 1483 0 iov 0 0K 24K 78643K 33 0 mount 1 1K 1K 78643K 1 0 vnodes 1225 77K 77K 78643K 1513 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 25 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 458 0 sigio 0 0K 0K 78643K 2 0 proc 62 63K 83K 78643K 500 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 51 0 in_multi 70 3K 3K 78643K 113 0 ether_multi 1 0K 0K 78643K 9 0 mrt 0 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 236 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 102 21K 37K 78643K 2207 0 UVM aobj 10 2K 2K 78643K 10 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 38 0 NDP 12 0K 0K 78643K 25 0 temp 98 3038K 3104K 78643K 7987 0 kqueue 3 4K 20K 78643K 33 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 9 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 42 0 40 1 0 1 1 0 8 0 rtentry 112 62 0 31 2 0 2 2 0 8 0 unpcb 120 229 0 214 2 1 1 2 0 8 0 syncache 264 7 0 7 2 1 1 1 0 8 1 tcpqe 32 102 0 102 2 1 1 1 0 8 1 tcpcb 544 133 0 127 1 0 1 1 0 8 0 inpcb 280 390 0 381 3 1 2 2 0 8 1 nd6 48 9 0 5 1 0 1 1 0 8 0 pkpcb 40 7 0 7 1 1 0 1 0 8 0 pffrag 232 9 0 9 1 1 0 1 0 482 0 pffrnode 88 9 0 9 1 1 0 1 0 8 0 pffrent 40 405 0 405 1 1 0 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 36 0 2 1 0 1 1 0 8 0 pfstkey 112 36 0 2 1 0 1 1 0 8 0 pfstate 328 36 0 2 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 256 273 0 133 12 2 10 12 0 8 0 art_table 32 275 0 133 2 0 2 2 0 8 0 art_node 16 61 0 33 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 2 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 21 0 11 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2033 0 628 46 0 46 46 0 8 0 ffsino 272 2033 0 628 95 0 95 95 0 8 0 nchpl 144 2746 0 1140 61 0 61 61 0 8 0 uvmvnodes 72 2292 0 0 42 0 42 42 0 8 0 vnodes 208 2292 0 0 121 0 121 121 0 8 0 namei 1024 7219 0 7219 1 0 1 1 0 8 1 percpumem 16 39 0 7 1 0 1 1 0 8 0 scxspl 192 9329 0 9329 7 3 4 6 0 8 4 plimitpl 152 36 0 28 1 0 1 1 0 8 0 sigapl 424 672 0 639 4 0 4 4 0 8 0 futexpl 56 3338 0 3337 1 0 1 1 0 8 0 knotepl 112 97 0 78 1 0 1 1 0 8 0 kqueuepl 144 55 0 52 1 0 1 1 0 8 0 pipelkpl 48 103 0 93 1 0 1 1 0 8 0 pipepl 120 206 0 187 1 0 1 1 0 8 0 fdescpl 496 655 0 639 3 0 3 3 0 8 0 filepl 152 2870 0 2765 5 0 5 5 0 8 0 lockfpl 104 73 0 72 1 0 1 1 0 8 0 lockfspl 48 31 0 30 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 19 0 8 1 0 1 1 0 8 0 ucredpl 96 242 0 233 1 0 1 1 0 8 0 zombiepl 144 639 0 638 1 0 1 1 0 8 0 processpl 984 672 0 638 5 0 5 5 0 8 0 procpl 624 1391 0 1347 4 0 4 4 0 8 0 sosppl 128 6 0 6 1 0 1 1 0 8 1 sockpl 400 668 0 642 6 2 4 5 0 8 0 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 165 0 0 20 0 20 20 0 8 0 mtagpl 80 40 0 0 1 0 1 1 0 8 0 mbufpl 256 324 0 0 21 1 20 20 0 8 0 bufpl 280 5342 0 174 370 0 370 370 0 8 0 anonpl 16 62294 0 51884 49 1 48 48 0 124 0 amapchunkpl 152 3785 0 3648 19 5 14 19 0 158 8 amappl16 192 2599 0 1977 33 0 33 33 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 11 0 10 3 2 1 1 0 8 0 amappl13 168 165 0 163 1 0 1 1 0 8 0 amappl12 160 9 0 7 1 0 1 1 0 8 0 amappl11 152 269 0 249 1 0 1 1 0 8 0 amappl10 144 19 0 13 1 0 1 1 0 8 0 amappl9 136 475 0 470 1 0 1 1 0 8 0 amappl8 128 402 0 387 1 0 1 1 0 8 0 amappl7 120 125 0 112 1 0 1 1 0 8 0 amappl6 112 213 0 210 1 0 1 1 0 8 0 amappl5 104 220 0 205 1 0 1 1 0 8 0 amappl4 96 840 0 810 1 0 1 1 0 8 0 amappl3 88 243 0 238 1 0 1 1 0 8 0 amappl2 80 4247 0 4168 3 1 2 3 0 8 0 amappl1 72 23156 0 22690 25 15 10 20 0 8 0 amappl 80 1658 0 1612 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 655 0 638 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 655 0 638 1 0 1 1 0 8 0 vmmpekpl 168 7763 0 7732 2 0 2 2 0 8 0 vmmpepl 168 84538 0 82672 103 5 98 98 0 357 16 vmsppl 368 654 0 638 2 0 2 2 0 8 0 pdppl 4096 1318 0 1276 6 0 6 6 0 8 0 pvpl 32 222173 0 208552 125 3 122 125 0 265 0 pmappl 232 654 0 638 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 182 0 8 6 0 6 6 0 8 0