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 424474 26026 0 0x14000 0x200 0 reaper *405609 72392 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(fffffd80641cd1a0,1,fffffd807f7bfa80,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8066bc9020,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8066bc9020,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8066bc9020,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8066bc9020,0) 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(fffffd80641cd1a0,1,fffffd807f7bfa80,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8066bc9020,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8066bc9020,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8066bc9020,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8066bc9020,0) 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 0xffff800020a2d540 rbx 0xffff800020a2d5f0 rdx 0xffff800020a195f0 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0xc65dabe6bdc91bf4 r12 0x3000000008 r13 0xffff800020a2d550 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d530 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=405609 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19860,0xffff800020a18eb0 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 23833 124001 73511 0 3 0x80 nanosleep syz-executor.0 23833 101444 73511 0 3 0x4000080 msgwait syz-executor.0 23833 417311 73511 0 3 0x4000080 fsleep syz-executor.0 23833 320619 73511 0 3 0x4000080 fsleep syz-executor.0 23833 289298 73511 0 3 0x4000080 fsleep syz-executor.0 19828 248906 0 0 3 0x14200 bored sosplice 60613 5599 31427 0 3 0x82 nanosleep syz-executor.1 73511 443155 31427 0 3 0x82 nanosleep syz-executor.0 31427 232765 11966 0 3 0x82 thrsleep syz-fuzzer 31427 203435 11966 0 3 0x4000082 thrsleep syz-fuzzer 31427 369634 11966 0 3 0x4000082 thrsleep syz-fuzzer 31427 117382 11966 0 3 0x4000082 thrsleep syz-fuzzer 31427 458181 11966 0 3 0x4000082 thrsleep syz-fuzzer 31427 491668 11966 0 3 0x4000082 thrsleep syz-fuzzer 31427 274026 11966 0 3 0x4000082 thrsleep syz-fuzzer 31427 292836 11966 0 3 0x4000082 thrsleep syz-fuzzer 31427 22599 11966 0 3 0x4000082 kqread syz-fuzzer 31427 125273 11966 0 3 0x4000082 thrsleep syz-fuzzer 11966 160997 45413 0 3 0x10008a pause ksh 45413 96761 37671 0 3 0x92 select sshd 40304 475754 1 0 3 0x100083 ttyin getty 37671 284507 1 0 3 0x80 select sshd 35969 130089 90711 74 3 0x100092 bpf pflogd 90711 449848 1 0 3 0x80 netio pflogd 61840 143831 18457 73 3 0x100090 kqread syslogd 18457 246970 1 0 3 0x100082 netio syslogd 45213 285241 1 77 3 0x100090 poll dhclient 81923 141596 1 0 3 0x80 poll dhclient 26705 106136 0 0 3 0x14200 bored smr 53066 430500 0 0 3 0x14200 pgzero zerothread 33367 174007 0 0 3 0x14200 aiodoned aiodoned 78588 336182 0 0 3 0x14200 syncer update 70130 331894 0 0 3 0x14200 cleaner cleaner 26026 424474 0 0 7 0x14200 reaper 44956 433303 0 0 3 0x14200 pgdaemon pagedaemon 85363 360169 0 0 3 0x14200 bored crynlk 41872 41121 0 0 3 0x14200 bored crypto 73359 182208 0 0 3 0x40014200 acpi0 acpi0 36334 150804 0 0 3 0x40014200 idle1 67339 307289 0 0 3 0x14200 bored softnet 51733 290773 0 0 3 0x14200 bored systqmp *72392 405609 0 0 7 0x14200 systq 50286 472998 0 0 3 0x40014200 bored softclock 15320 89750 0 0 3 0x40014200 idle0 1 391542 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 72392 (systq) thread 0xffff800020a195f0 (405609) exclusive rrwlock inode r = 0 (0xfffffd806405ed60) #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 9492 6404K 6787K 78643K 10890 0 pcb 13 8K 8K 78643K 85 0 rtable 99 3K 3K 78643K 242 0 ifaddr 56 12K 12K 78643K 88 0 counters 43 33K 34K 78643K 53 0 ioctlops 0 0K 4K 78643K 1479 0 iov 0 0K 12K 78643K 11 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1314 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 18 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 159 0 sigio 0 0K 0K 78643K 10 0 proc 61 63K 83K 78643K 462 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 132 0 in_multi 42 2K 2K 78643K 75 0 ether_multi 1 0K 0K 78643K 14 0 mrt 0 0K 0K 78643K 2 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 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 108 38K 54K 78643K 1488 0 UVM aobj 20 2K 2K 78643K 22 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 37 0 NDP 8 0K 0K 78643K 17 0 temp 90 3039K 3106K 78643K 5450 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 23 0 21 1 0 1 1 0 8 0 rtentry 112 48 0 7 2 0 2 2 0 8 0 unpcb 120 77 0 62 1 0 1 1 0 8 0 syncache 264 6 0 6 2 1 1 1 0 8 1 tcpqe 32 118 0 118 1 1 0 1 0 8 0 tcpcb 544 221 0 217 1 0 1 1 0 8 0 inpcb 280 405 0 398 2 0 2 2 0 8 1 nd6 48 7 0 3 1 0 1 1 0 8 0 pffrag 232 1 0 1 1 1 0 1 0 482 0 pffrnode 88 1 0 1 1 1 0 1 0 8 0 pffrent 40 45 0 45 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 24 0 4 1 0 1 1 0 8 0 pfstkey 112 24 0 4 1 0 1 1 0 8 0 pfstate 328 24 0 4 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 256 191 0 18 12 0 12 12 0 8 0 art_table 32 192 0 18 2 0 2 2 0 8 0 art_node 16 47 0 9 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 6 2 1 1 1 0 8 0 semapl 112 16 0 6 1 0 1 1 0 8 0 shmpl 112 20 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1600 0 193 46 0 46 46 0 8 0 ffsino 272 1600 0 193 95 0 95 95 0 8 0 nchpl 144 2013 0 393 61 0 61 61 0 8 0 uvmvnodes 72 1718 0 0 32 0 32 32 0 8 0 vnodes 208 1718 0 0 91 0 91 91 0 8 0 namei 1024 5267 0 5267 1 0 1 1 0 8 1 percpumem 16 37 0 5 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 2 1 0 1 1 0 8 0 scxspl 192 5969 0 5969 3 2 1 2 0 8 1 plimitpl 152 24 0 16 1 0 1 1 0 8 0 sigapl 424 375 0 343 4 0 4 4 0 8 0 futexpl 56 2467 0 2464 1 0 1 1 0 8 0 knotepl 112 53 0 34 1 0 1 1 0 8 0 kqueuepl 144 46 0 44 1 0 1 1 0 8 0 pipelkpl 48 99 0 89 1 0 1 1 0 8 0 pipepl 120 198 0 179 1 0 1 1 0 8 0 fdescpl 496 359 0 343 3 0 3 3 0 8 0 filepl 152 2128 0 2020 6 1 5 6 0 8 0 lockfpl 104 21 0 20 1 0 1 1 0 8 0 lockfspl 48 9 0 8 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 96 154 0 145 1 0 1 1 0 8 0 zombiepl 144 343 0 342 1 0 1 1 0 8 0 processpl 984 375 0 342 5 0 5 5 0 8 0 procpl 624 717 0 670 4 0 4 4 0 8 0 sosppl 128 3 0 3 2 1 1 1 0 8 1 sockpl 400 507 0 483 4 1 3 4 0 8 0 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 159 0 0 19 0 19 19 0 8 0 mtagpl 80 8 0 0 1 0 1 1 0 8 0 mbufpl 256 328 0 0 20 0 20 20 0 8 0 bufpl 280 4269 0 174 293 0 293 293 0 8 0 anonpl 16 49176 0 34723 75 1 74 74 0 124 15 amapchunkpl 152 2464 0 2312 20 7 13 20 0 158 6 amappl16 192 1654 0 878 51 4 47 51 0 8 8 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 4 0 3 2 1 1 1 0 8 0 amappl13 168 94 0 90 1 0 1 1 0 8 0 amappl12 160 6 0 3 2 1 1 1 0 8 0 amappl11 152 73 0 55 1 0 1 1 0 8 0 amappl10 144 91 0 84 1 0 1 1 0 8 0 amappl9 136 388 0 385 1 0 1 1 0 8 0 amappl8 128 296 0 285 1 0 1 1 0 8 0 amappl7 120 182 0 170 1 0 1 1 0 8 0 amappl6 112 23 0 18 1 0 1 1 0 8 0 amappl5 104 258 0 241 1 0 1 1 0 8 0 amappl4 96 562 0 531 2 1 1 2 0 8 0 amappl3 88 113 0 104 1 0 1 1 0 8 0 amappl2 80 1946 0 1871 3 1 2 3 0 8 0 amappl1 72 17827 0 17361 26 16 10 20 0 8 0 amappl 80 977 0 925 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 21 0 2 1 0 1 1 0 8 0 uaddrrnd 24 363 0 344 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 363 0 344 1 0 1 1 0 8 0 vmmpekpl 168 6614 0 6575 2 0 2 2 0 8 0 vmmpepl 168 50891 0 48855 108 10 98 103 0 357 9 vmsppl 368 362 0 344 2 0 2 2 0 8 0 pdppl 4096 734 0 690 6 0 6 6 0 8 0 pvpl 32 162387 0 144500 177 0 177 177 0 265 32 pmappl 232 362 0 344 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 175 0 4 5 0 5 5 0 8 0