login: panic: kernel diagnostic assertion "p == curproc" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/vfs_vops.c", line 169 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 336413 16007 0 0x14000 0x200 1 reaper *220028 90952 0 0x14000 0x200 0K systq db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821efc13) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82249f12,ffffffff822695b4,a9,ffffffff8222b23a) at __assert+0x2b sys/kern/subr_prf.c:154 VOP_CLOSE(fffffd8067bde420,1,fffffd807f7bf840,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80691f36a0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80691f36a0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80691f36a0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80691f36a0,0) at closef+0x11c sys/kern/kern_descrip.c:1260 unp_gc(0) at unp_gc+0x172 sys/kern/uipc_usrreq.c:944 taskq_thread(ffffffff8251f4f0) 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/setuid/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(ffffffff821efc13) at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff82249f12,ffffffff822695b4,a9,ffffffff8222b23a) at __assert+0x2b sys/kern/subr_prf.c:154 VOP_CLOSE(fffffd8067bde420,1,fffffd807f7bf840,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80691f36a0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80691f36a0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80691f36a0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80691f36a0,0) at closef+0x11c sys/kern/kern_descrip.c:1260 unp_gc(0) at unp_gc+0x172 sys/kern/uipc_usrreq.c:944 taskq_thread(ffffffff8251f4f0) 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 0xffff800020a2d890 rbx 0xffff800020a2d940 rdx 0xffff800020a18750 rcx 0 rax 0 r8 0xffffffff810939af kprintf+0x16f r9 0x1 r10 0x25 r11 0x3fb4880d214f72a7 r12 0x3000000008 r13 0xffff800020a2d8a0 r14 0x100 r15 0x1 rip 0xffffffff81146c58 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d880 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=220028 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19380,0xffff800020a184f0 process=0xffff800020a1a000 user=0xffff800020a28000, vmspace=0xffffffff8266bc88 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 75248 14483 48095 32767 2 0x10 syz-executor.1 75248 465915 48095 32767 3 0x4000090 fsleep syz-executor.1 51032 150357 46933 32767 2 0x490 syz-executor.0 48095 351827 49913 32767 3 0x90 nanosleep syz-executor.1 49913 399397 25236 0 3 0x82 wait syz-executor.1 46933 49590 25236 0 3 0x82 wait syz-executor.0 25236 24351 95201 0 3 0x82 thrsleep syz-fuzzer 25236 128380 95201 0 2 0x4000482 syz-fuzzer 25236 163262 95201 0 3 0x4000082 thrsleep syz-fuzzer 25236 346450 95201 0 3 0x4000082 thrsleep syz-fuzzer 25236 36607 95201 0 3 0x4000082 thrsleep syz-fuzzer 25236 441984 95201 0 3 0x4000082 kqread syz-fuzzer 25236 452466 95201 0 3 0x4000082 thrsleep syz-fuzzer 25236 347900 95201 0 3 0x4000082 thrsleep syz-fuzzer 25236 417586 95201 0 3 0x4000082 thrsleep syz-fuzzer 25236 222459 95201 0 3 0x4000082 thrsleep syz-fuzzer 95201 270812 2698 0 3 0x10008a pause ksh 2698 347398 35269 0 3 0x92 select sshd 95710 503997 1 0 3 0x100083 ttyin getty 35269 466243 1 0 3 0x80 select sshd 78149 480830 38363 73 3 0x100090 kqread syslogd 38363 146582 1 0 3 0x100082 netio syslogd 28202 227836 1 77 3 0x100090 poll dhclient 63014 412627 1 0 3 0x80 poll dhclient 65295 479663 0 0 3 0x14200 bored smr 47167 235388 0 0 3 0x14200 pgzero zerothread 17733 137628 0 0 3 0x14200 aiodoned aiodoned 58726 149685 0 0 3 0x14200 syncer update 1535 3943 0 0 3 0x14200 cleaner cleaner 16007 336413 0 0 7 0x14200 reaper 22115 26754 0 0 3 0x14200 pgdaemon pagedaemon 94842 143546 0 0 3 0x14200 bored crynlk 12350 52099 0 0 3 0x14200 bored crypto 75237 110096 0 0 3 0x40014200 acpi0 acpi0 46362 354832 0 0 3 0x40014200 idle1 66064 195685 0 0 3 0x14200 bored softnet 16527 111340 0 0 3 0x14200 bored systqmp *90952 220028 0 0 7 0x14200 systq 61558 172658 0 0 3 0x40014200 bored softclock 8972 415650 0 0 3 0x40014200 idle0 1 490484 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 90952 (systq) thread 0xffff800020a18750 (220028) exclusive rrwlock inode r = 0 (0xfffffd80668266f8) #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 (0xffffffff8251f550) #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 (0xffffffff8263a520) #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 9465 6331K 6331K 78643K 10556 0 pcb 13 8K 8K 78643K 13 0 rtable 105 3K 3K 78643K 189 0 ifaddr 39 10K 10K 78643K 39 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 2K 78643K 15 0 mount 1 1K 1K 78643K 1 0 vnodes 1216 76K 76K 78643K 1221 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 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 28 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 7 21K 33K 78643K 124 0 proc 48 50K 83K 78643K 359 0 subproc 34 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 33 2K 2K 78643K 33 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 31 148K 148K 78643K 31 0 exec 0 0K 1K 78643K 181 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 85 20K 21K 78643K 1095 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 28 0 NDP 5 0K 0K 78643K 9 0 temp 62 3035K 3099K 78643K 2004 0 kqueue 3 4K 10K 78643K 18 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 19 0 17 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 73 0 63 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 11 0 11 2 2 0 1 0 8 0 tcpcb 544 38 0 33 1 0 1 1 0 8 0 inpcb 280 95 0 86 1 0 1 1 0 8 0 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 256 188 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 semapl 112 26 0 16 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1526 0 127 46 0 46 46 0 8 0 ffsino 272 1526 0 127 94 0 94 94 0 8 0 nchpl 144 1862 0 252 60 0 60 60 0 8 0 uvmvnodes 72 1569 0 0 29 0 29 29 0 8 0 vnodes 208 1569 0 0 83 0 83 83 0 8 0 namei 1024 4363 0 4363 1 0 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 192 5738 0 5738 7 1 6 6 0 8 6 plimitpl 152 16 0 7 1 0 1 1 0 8 0 sigapl 424 311 0 280 4 0 4 4 0 8 0 futexpl 56 1162 0 1161 1 0 1 1 0 8 0 knotepl 112 69 0 50 1 0 1 1 0 8 0 kqueuepl 144 67 0 65 1 0 1 1 0 8 0 pipelkpl 48 65 0 55 1 0 1 1 0 8 0 pipepl 120 130 0 111 1 0 1 1 0 8 0 fdescpl 496 296 0 280 3 0 3 3 0 8 0 filepl 152 1309 0 1207 5 0 5 5 0 8 1 lockfpl 104 83 0 82 1 0 1 1 0 8 0 lockfspl 48 30 0 29 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 61 0 52 1 0 1 1 0 8 0 zombiepl 144 280 0 279 1 0 1 1 0 8 0 processpl 984 311 0 279 5 0 5 5 0 8 0 procpl 624 444 0 401 4 0 4 4 0 8 0 sockpl 400 187 0 166 3 0 3 3 0 8 0 mcl9k 9216 16 0 0 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 112 0 0 13 0 13 13 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 216 0 0 14 1 13 13 0 8 0 bufpl 280 4289 0 165 295 0 295 295 0 8 0 anonpl 16 32614 0 29807 17 1 16 16 0 124 1 amapchunkpl 152 1353 0 1262 6 0 6 6 0 158 1 amappl16 192 696 0 593 9 0 9 9 0 8 3 amappl15 184 92 0 85 2 1 1 1 0 8 0 amappl14 176 3 0 2 2 1 1 1 0 8 0 amappl13 168 24 0 23 1 0 1 1 0 8 0 amappl12 160 8 0 8 1 1 0 1 0 8 0 amappl11 152 66 0 53 1 0 1 1 0 8 0 amappl10 144 15 0 10 1 0 1 1 0 8 0 amappl9 136 400 0 394 1 0 1 1 0 8 0 amappl8 128 320 0 303 1 0 1 1 0 8 0 amappl7 120 105 0 94 1 0 1 1 0 8 0 amappl6 112 21 0 19 1 0 1 1 0 8 0 amappl5 104 283 0 270 1 0 1 1 0 8 0 amappl4 96 438 0 411 1 0 1 1 0 8 0 amappl3 88 132 0 124 1 0 1 1 0 8 0 amappl2 80 1584 0 1509 3 1 2 3 0 8 0 amappl1 72 15189 0 14736 24 10 14 20 0 8 4 amappl 80 655 0 617 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 296 0 279 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 296 0 279 1 0 1 1 0 8 0 vmmpekpl 168 5905 0 5873 2 0 2 2 0 8 0 vmmpepl 168 41204 0 39819 82 9 73 77 0 357 12 vmsppl 368 295 0 279 2 0 2 2 0 8 0 pdppl 4096 600 0 558 6 0 6 6 0 8 0 pvpl 32 141582 0 135617 115 4 111 115 0 265 59 pmappl 232 295 0 279 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 157 0 3 5 0 5 5 0 8 0