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 14778 10043 0 0x14000 0x200 1 reaper *321721 22885 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(fffffd8067843430,1,fffffd807f7bfa20,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80679d4ef0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80679d4ef0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80679d4ef0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80679d4ef0,0) 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(fffffd8067843430,1,fffffd807f7bfa20,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80679d4ef0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80679d4ef0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80679d4ef0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80679d4ef0,0) 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 0xffff800020a2d9b0 rbx 0xffff800020a2da60 rdx 0xffff800020a18750 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0x256039c771a46112 r12 0x3000000008 r13 0xffff800020a2d9c0 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d9a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=321721 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19110,0xffff800020a184f0 process=0xffff800020a1a3d8 user=0xffff800020a28000, vmspace=0xffffffff82648778 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95330 367334 1 0 3 0x100083 ttyin getty 46476 314573 0 0 3 0x14200 bored sosplice 73330 407784 94569 0 2 0x482 syz-executor.1 35865 499556 94569 0 2 0x482 syz-executor.0 94569 398445 72959 0 3 0x82 thrsleep syz-fuzzer 94569 199875 72959 0 3 0x4000082 thrsleep syz-fuzzer 94569 479376 72959 0 3 0x4000082 thrsleep syz-fuzzer 94569 498935 72959 0 3 0x4000082 thrsleep syz-fuzzer 94569 423997 72959 0 3 0x4000082 thrsleep syz-fuzzer 94569 523470 72959 0 3 0x4000082 thrsleep syz-fuzzer 94569 193309 72959 0 3 0x4000082 thrsleep syz-fuzzer 94569 225907 72959 0 3 0x4000082 kqread syz-fuzzer 94569 396376 72959 0 3 0x4000082 thrsleep syz-fuzzer 94569 402873 72959 0 3 0x4000082 thrsleep syz-fuzzer 72959 511966 41016 0 3 0x10008a pause ksh 41016 421705 74193 0 3 0x92 select sshd 74193 326791 1 0 3 0x80 select sshd 93436 494113 72299 74 3 0x100092 bpf pflogd 72299 416121 1 0 3 0x80 netio pflogd 68112 120448 36103 73 3 0x100090 kqread syslogd 36103 396231 1 0 3 0x100082 netio syslogd 26484 429325 1 77 3 0x100090 poll dhclient 85042 155516 1 0 3 0x80 poll dhclient 97361 251677 0 0 3 0x14200 bored smr 3342 464996 0 0 3 0x14200 pgzero zerothread 84443 58463 0 0 3 0x14200 aiodoned aiodoned 71504 415851 0 0 3 0x14200 syncer update 14539 118876 0 0 3 0x14200 cleaner cleaner 10043 14778 0 0 7 0x14200 reaper 86299 496069 0 0 3 0x14200 pgdaemon pagedaemon 4469 225567 0 0 3 0x14200 bored crynlk 79683 356283 0 0 3 0x14200 bored crypto 26920 481207 0 0 3 0x40014200 acpi0 acpi0 12839 335664 0 0 3 0x40014200 idle1 80331 485224 0 0 3 0x14200 bored softnet 16058 31153 0 0 3 0x14200 bored systqmp *22885 321721 0 0 7 0x14200 systq 63791 157976 0 0 3 0x40014200 bored softclock 49673 110428 0 0 3 0x40014200 idle0 1 182913 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 22885 (systq) thread 0xffff800020a18750 (321721) exclusive rrwlock inode r = 0 (0xfffffd806734a4e0) #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 9511 6413K 6982K 78643K 10967 0 pcb 13 8K 8K 78643K 54 0 rtable 108 4K 4K 78643K 230 0 ifaddr 67 13K 13K 78643K 80 0 counters 43 33K 34K 78643K 47 0 ioctlops 0 0K 4K 78643K 1470 0 iov 0 0K 12K 78643K 12 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1313 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 0K 78643K 18 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 4 9K 25K 78643K 220 0 proc 62 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 27 0 in_multi 40 2K 2K 78643K 68 0 ether_multi 1 0K 0K 78643K 7 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 221 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 100 21K 22K 78643K 1507 0 UVM aobj 7 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 24 0 NDP 11 0K 0K 78643K 17 0 temp 91 3037K 3101K 78643K 2589 0 kqueue 3 4K 18K 78643K 31 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 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 31 0 29 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 67 0 55 1 0 1 1 0 8 0 syncache 264 9 0 9 2 1 1 1 0 8 1 tcpqe 32 789 0 789 1 1 0 1 0 8 0 tcpcb 544 92 0 88 1 0 1 1 0 8 0 inpcb 280 209 0 202 2 0 2 2 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 ppxss 1128 1 0 1 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 25 0 0 1 0 1 1 0 8 0 pfstkey 112 25 0 0 1 0 1 1 0 8 0 pfstate 328 25 0 0 3 0 3 3 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 256 188 0 0 12 0 12 12 0 8 0 art_table 32 189 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 0 1 0 1 1 0 8 0 semupl 112 7 0 7 1 0 1 1 0 8 1 semapl 112 16 0 6 1 0 1 1 0 8 0 shmpl 112 8 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1682 0 273 46 0 46 46 0 8 0 ffsino 272 1682 0 273 95 0 95 95 0 8 0 nchpl 144 2128 0 507 61 0 61 61 0 8 0 uvmvnodes 72 1793 0 0 33 0 33 33 0 8 0 vnodes 208 1793 0 0 95 0 95 95 0 8 0 namei 1024 5523 0 5523 1 0 1 1 0 8 1 percpumem 16 34 0 2 1 0 1 1 0 8 0 scxspl 192 6446 0 6446 7 1 6 6 0 8 6 plimitpl 152 30 0 22 1 0 1 1 0 8 0 sigapl 424 437 0 406 4 0 4 4 0 8 0 futexpl 56 1430 0 1430 1 0 1 1 0 8 1 knotepl 112 98 0 79 1 0 1 1 0 8 0 kqueuepl 144 38 0 36 1 0 1 1 0 8 0 pipelkpl 48 78 0 68 1 0 1 1 0 8 0 pipepl 120 156 0 137 1 0 1 1 0 8 0 fdescpl 496 421 0 406 3 0 3 3 0 8 0 filepl 152 1863 0 1760 5 0 5 5 0 8 0 lockfpl 104 48 0 47 1 0 1 1 0 8 0 lockfspl 48 20 0 19 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 96 142 0 133 1 0 1 1 0 8 0 zombiepl 144 406 0 404 1 0 1 1 0 8 0 processpl 984 437 0 404 5 0 5 5 0 8 0 procpl 624 753 0 710 4 0 4 4 0 8 0 sosppl 128 5 0 5 1 0 1 1 0 8 1 sockpl 400 307 0 286 3 0 3 3 0 8 0 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 191 0 0 23 0 23 23 0 8 0 mtagpl 80 23 0 0 1 0 1 1 0 8 0 mbufpl 256 212 0 0 13 0 13 13 0 8 0 bufpl 280 4341 0 174 298 0 298 298 0 8 0 anonpl 16 48636 0 36572 58 1 57 57 0 124 7 amapchunkpl 152 2019 0 1872 11 0 11 11 0 158 3 amappl16 192 1550 0 926 33 0 33 33 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 95 0 94 3 2 1 1 0 8 0 amappl13 168 37 0 33 1 0 1 1 0 8 0 amappl12 160 7 0 5 2 1 1 1 0 8 0 amappl11 152 74 0 56 1 0 1 1 0 8 0 amappl10 144 112 0 105 1 0 1 1 0 8 0 amappl9 136 391 0 387 1 0 1 1 0 8 0 amappl8 128 292 0 279 1 0 1 1 0 8 0 amappl7 120 213 0 201 1 0 1 1 0 8 0 amappl6 112 24 0 21 1 0 1 1 0 8 0 amappl5 104 319 0 303 1 0 1 1 0 8 0 amappl4 96 512 0 477 2 1 1 2 0 8 0 amappl3 88 107 0 101 1 0 1 1 0 8 0 amappl2 80 2446 0 2378 3 1 2 3 0 8 0 amappl1 72 18783 0 18333 25 14 11 20 0 8 1 amappl 80 1004 0 957 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 3 1 0 1 1 0 8 0 uaddrrnd 24 421 0 405 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 421 0 405 1 0 1 1 0 8 0 vmmpekpl 168 6611 0 6575 2 0 2 2 0 8 0 vmmpepl 168 57050 0 55290 106 7 99 100 0 357 17 vmsppl 368 420 0 405 2 0 2 2 0 8 0 pdppl 4096 850 0 810 6 0 6 6 0 8 0 pvpl 32 166522 0 151340 145 1 144 144 0 265 18 pmappl 232 420 0 405 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 170 0 3 5 0 5 5 0 8 0