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 455648 51421 0 0x14000 0x200 1 reaper *217321 70851 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(fffffd8067f5dc30,81,fffffd807f7bfb40,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806753ac90,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806753ac90,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806753ac90,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806753ac90,0) 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(fffffd8067f5dc30,81,fffffd807f7bfb40,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806753ac90,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806753ac90,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806753ac90,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806753ac90,0) 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 0xffff800020a2d040 rbx 0xffff800020a2d0f0 rdx 0xffff800020a19380 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0xb961bfdad8d279e8 r12 0x3000000008 r13 0xffff800020a2d050 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d030 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=217321 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a195f0,0xffff800020a19120 process=0xffff800020a1af60 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 6155 299861 75359 0 2 0x480 syz-executor.1 6155 308462 75359 0 3 0x4000080 fsleep syz-executor.1 68151 129776 0 0 3 0x14200 bored sosplice 75359 403663 19567 0 2 0x482 syz-executor.1 98208 316686 19567 0 2 0x482 syz-executor.0 19567 40967 37221 0 3 0x82 thrsleep syz-fuzzer 19567 389984 37221 0 3 0x4000082 thrsleep syz-fuzzer 19567 52019 37221 0 3 0x4000082 thrsleep syz-fuzzer 19567 212872 37221 0 3 0x4000082 thrsleep syz-fuzzer 19567 173503 37221 0 3 0x4000082 thrsleep syz-fuzzer 19567 162307 37221 0 3 0x4000082 thrsleep syz-fuzzer 19567 10179 37221 0 3 0x4000082 thrsleep syz-fuzzer 19567 226550 37221 0 3 0x4000082 kqread syz-fuzzer 19567 402382 37221 0 3 0x4000082 thrsleep syz-fuzzer 19567 161351 37221 0 3 0x4000082 thrsleep syz-fuzzer 37221 136369 22150 0 3 0x10008a pause ksh 22150 123525 50731 0 3 0x92 select sshd 42549 102013 1 0 3 0x100083 ttyin getty 50731 101185 1 0 3 0x80 select sshd 66549 394533 36752 74 3 0x100092 bpf pflogd 36752 92521 1 0 3 0x80 netio pflogd 27530 16648 51954 73 3 0x100090 kqread syslogd 51954 41483 1 0 3 0x100082 netio syslogd 67186 325015 1 77 3 0x100090 poll dhclient 62504 316164 1 0 3 0x80 poll dhclient 69318 265062 0 0 3 0x14200 bored smr 34595 260866 0 0 3 0x14200 pgzero zerothread 71263 432487 0 0 3 0x14200 aiodoned aiodoned 88436 27148 0 0 3 0x14200 syncer update 73462 244835 0 0 3 0x14200 cleaner cleaner 51421 455648 0 0 7 0x14200 reaper 99120 378536 0 0 3 0x14200 pgdaemon pagedaemon 98897 517623 0 0 3 0x14200 bored crynlk 63734 375432 0 0 3 0x14200 bored crypto 81796 346060 0 0 3 0x40014200 acpi0 acpi0 26381 377537 0 0 3 0x40014200 idle1 93129 75987 0 0 3 0x14200 bored softnet 44126 50966 0 0 3 0x14200 bored systqmp *70851 217321 0 0 7 0x14200 systq 36356 81817 0 0 3 0x40014200 bored softclock 13662 93464 0 0 3 0x40014200 idle0 1 181739 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 70851 (systq) thread 0xffff800020a19380 (217321) exclusive rrwlock inode r = 0 (0xfffffd80644c50a0) #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 9525 6418K 6796K 78643K 10825 0 pcb 14 8K 8K 78643K 38 0 rtable 101 3K 3K 78643K 277 0 ifaddr 74 13K 13K 78643K 87 0 counters 43 33K 34K 78643K 45 0 ioctlops 0 0K 4K 78643K 1475 0 iov 0 0K 24K 78643K 27 0 mount 1 1K 1K 78643K 1 0 vnodes 1222 77K 77K 78643K 1297 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 26 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 165 0 sigio 0 0K 0K 78643K 2 0 proc 61 63K 83K 78643K 461 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 1 0K 0K 78643K 48 0 in_multi 38 2K 2K 78643K 81 0 ether_multi 2 0K 0K 78643K 8 0 mrt 0 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 216 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 37K 38K 78643K 1472 0 UVM aobj 6 2K 2K 78643K 6 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 2 0K 0K 78643K 28 0 NDP 13 0K 0K 78643K 21 0 temp 116 3041K 3105K 78643K 7365 0 kqueue 3 4K 8K 78643K 10 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 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 33 0 31 1 0 1 1 0 8 0 rtentry 112 64 0 22 2 0 2 2 0 8 0 unpcb 120 77 0 65 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 96 0 96 1 1 0 1 0 8 0 tcpcb 544 86 0 81 1 0 1 1 0 8 0 inpcb 280 207 0 196 2 0 2 2 0 8 1 nd6 48 9 0 5 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 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 2 0 2 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 2 1 0 1 1 0 8 0 pfstkey 112 24 0 2 1 0 1 1 0 8 0 pfstate 328 24 0 2 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 256 274 0 97 14 1 13 13 0 8 0 art_table 32 275 0 97 2 0 2 2 0 8 0 art_node 16 63 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 18 0 8 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1635 0 229 46 0 46 46 0 8 0 ffsino 272 1635 0 229 95 0 95 95 0 8 0 nchpl 144 2133 0 513 61 0 61 61 0 8 0 uvmvnodes 72 1727 0 0 32 0 32 32 0 8 0 vnodes 208 1727 0 0 91 0 91 91 0 8 0 namei 1024 5593 0 5593 1 0 1 1 0 8 1 percpumem 16 33 0 1 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 6201 0 6201 8 2 6 7 0 8 6 plimitpl 152 29 0 21 1 0 1 1 0 8 0 sigapl 424 381 0 349 4 0 4 4 0 8 0 futexpl 56 2311 0 2310 1 0 1 1 0 8 0 knotepl 112 66 0 47 1 0 1 1 0 8 0 kqueuepl 144 20 0 18 1 0 1 1 0 8 0 pipelkpl 48 98 0 88 1 0 1 1 0 8 0 pipepl 120 196 0 177 1 0 1 1 0 8 0 fdescpl 496 365 0 349 3 0 3 3 0 8 0 filepl 152 2097 0 1991 5 0 5 5 0 8 0 lockfpl 104 51 0 50 1 0 1 1 0 8 0 lockfspl 48 24 0 23 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 155 0 146 1 0 1 1 0 8 0 zombiepl 144 349 0 348 1 0 1 1 0 8 0 processpl 984 381 0 348 5 0 5 5 0 8 0 procpl 624 712 0 669 5 0 5 5 0 8 1 sockpl 400 323 0 300 4 0 4 4 0 8 1 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 151 0 0 18 0 18 18 0 8 0 mtagpl 80 17 0 0 1 0 1 1 0 8 0 mbufpl 256 217 0 0 14 0 14 14 0 8 0 bufpl 280 4357 0 172 299 0 299 299 0 8 0 anonpl 16 45025 0 31168 57 1 56 56 0 124 0 amapchunkpl 152 1954 0 1811 8 0 8 8 0 158 0 amappl16 192 1446 0 698 38 0 38 38 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 9 0 8 2 1 1 1 0 8 0 amappl13 168 84 0 80 1 0 1 1 0 8 0 amappl12 160 7 0 4 1 0 1 1 0 8 0 amappl11 152 69 0 51 1 0 1 1 0 8 0 amappl10 144 23 0 19 1 0 1 1 0 8 0 amappl9 136 464 0 458 1 0 1 1 0 8 0 amappl8 128 372 0 360 1 0 1 1 0 8 0 amappl7 120 118 0 107 1 0 1 1 0 8 0 amappl6 112 29 0 26 1 0 1 1 0 8 0 amappl5 104 267 0 251 1 0 1 1 0 8 0 amappl4 96 564 0 532 2 1 1 2 0 8 0 amappl3 88 117 0 109 1 0 1 1 0 8 0 amappl2 80 1988 0 1910 3 1 2 3 0 8 0 amappl1 72 18156 0 17702 26 16 10 20 0 8 0 amappl 80 970 0 921 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 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 369 0 350 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 369 0 350 1 0 1 1 0 8 0 vmmpekpl 168 6700 0 6666 2 0 2 2 0 8 0 vmmpepl 168 51166 0 49175 104 15 89 99 0 357 2 vmsppl 368 368 0 350 2 0 2 2 0 8 0 pdppl 4096 746 0 702 6 0 6 6 0 8 0 pvpl 32 160901 0 143821 143 0 143 143 0 265 4 pmappl 232 368 0 350 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 172 0 4 5 0 5 5 0 8 0