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 16265 25810 0 0x14000 0x200 1 reaper * 41175 33056 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(fffffd807efc3000,1,fffffd807f7bf840,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806d484600,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806d484600,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806d484600,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806d484600,0) 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(fffffd807efc3000,1,fffffd807f7bf840,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806d484600,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806d484600,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806d484600,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806d484600,0) 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 0xffff800020a2d1d0 rbx 0xffff800020a2d280 rdx 0xffff800020a18c30 rcx 0 rax 0 r8 0xffffffff810939af kprintf+0x16f r9 0x1 r10 0x25 r11 0x961718b672d37eb4 r12 0x3000000008 r13 0xffff800020a2d1e0 r14 0x100 r15 0x1 rip 0xffffffff81146c58 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d1c0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=41175 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020a18ea0,0xffff800020a18280 process=0xffff800020a1a000 user=0xffff800020a28000, vmspace=0xffffffff8266bc88 estcpu=1, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 62879 324011 63557 32767 2 0x10 syz-executor.0 62879 399249 63557 32767 3 0x4000090 fsleep syz-executor.0 63557 194808 93837 32767 2 0x490 syz-executor.0 93837 428582 52662 0 3 0x82 wait syz-executor.0 75671 492410 0 0 3 0x14200 bored sosplice 47703 141869 84350 32767 2 0x490 syz-executor.1 84350 17953 52662 0 3 0x82 wait syz-executor.1 52662 145652 7636 0 3 0x82 thrsleep syz-fuzzer 52662 26676 7636 0 3 0x4000082 thrsleep syz-fuzzer 52662 350858 7636 0 3 0x4000082 thrsleep syz-fuzzer 52662 26184 7636 0 3 0x4000082 thrsleep syz-fuzzer 52662 286631 7636 0 3 0x4000082 thrsleep syz-fuzzer 52662 65398 7636 0 3 0x4000082 thrsleep syz-fuzzer 52662 237296 7636 0 3 0x4000082 kqread syz-fuzzer 52662 508106 7636 0 3 0x4000082 thrsleep syz-fuzzer 52662 441381 7636 0 3 0x4000082 thrsleep syz-fuzzer 52662 132492 7636 0 3 0x4000082 thrsleep syz-fuzzer 7636 115041 93927 0 3 0x10008a pause ksh 93927 215400 10270 0 3 0x92 select sshd 72137 110163 1 0 3 0x100083 ttyin getty 10270 168026 1 0 3 0x80 select sshd 83186 464767 50461 73 3 0x100090 kqread syslogd 50461 109641 1 0 3 0x100082 netio syslogd 4021 177593 1 77 3 0x100090 poll dhclient 58409 139391 1 0 3 0x80 poll dhclient 50021 513144 0 0 3 0x14200 bored smr 41360 147134 0 0 2 0x14200 zerothread 38874 100195 0 0 3 0x14200 aiodoned aiodoned 5351 221960 0 0 3 0x14200 syncer update 27972 342078 0 0 3 0x14200 cleaner cleaner 25810 16265 0 0 7 0x14200 reaper 52624 413265 0 0 3 0x14200 pgdaemon pagedaemon 80704 104535 0 0 3 0x14200 bored crynlk 15576 339083 0 0 3 0x14200 bored crypto 50927 404669 0 0 3 0x40014200 acpi0 acpi0 91103 410784 0 0 3 0x40014200 idle1 46453 184180 0 0 3 0x14200 bored softnet 97912 398253 0 0 3 0x14200 bored systqmp *33056 41175 0 0 7 0x14200 systq 58917 34337 0 0 3 0x40014200 bored softclock 71206 6215 0 0 3 0x40014200 idle0 1 427158 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 33056 (systq) thread 0xffff800020a18c30 (41175) exclusive rrwlock inode r = 0 (0xfffffd807ecc4098) #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 9469 6332K 6332K 78643K 10568 0 pcb 13 8K 8K 78643K 13 0 rtable 105 3K 3K 78643K 269 0 ifaddr 39 10K 10K 78643K 53 0 counters 43 33K 33K 78643K 47 0 ioctlops 0 0K 2K 78643K 21 0 iov 0 0K 16K 78643K 4 0 mount 1 1K 1K 78643K 1 0 vnodes 1216 76K 76K 78643K 1263 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 1K 1K 78643K 22 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 7 21K 33K 78643K 149 0 proc 48 50K 70K 78643K 460 0 subproc 34 2K 2K 78643K 68 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 33 2K 2K 78643K 61 0 ether_multi 1 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 215 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 25K 78643K 1292 0 UVM aobj 8 2K 2K 78643K 8 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 20 0 NDP 5 0K 0K 78643K 15 0 temp 70 3037K 3101K 78643K 2267 0 kqueue 3 4K 12K 78643K 12 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 10 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 27 0 25 1 0 1 1 0 8 0 rtentry 112 67 0 23 2 0 2 2 0 8 0 unpcb 120 119 0 109 1 0 1 1 0 8 0 syncache 264 9 0 9 2 1 1 1 0 8 1 tcpcb 544 60 0 56 1 0 1 1 0 8 0 ipq 40 1 0 1 1 0 1 1 0 8 1 ipqe 40 45 0 45 1 0 1 1 0 8 1 inpcb 280 262 0 255 2 0 2 2 0 8 1 nd6 48 12 0 6 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 277 0 88 12 0 12 12 0 8 0 art_table 32 278 0 88 2 0 2 2 0 8 0 art_node 16 66 0 26 1 0 1 1 0 8 0 semapl 112 18 0 8 1 0 1 1 0 8 0 shmpl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1524 0 125 46 0 46 46 0 8 0 ffsino 272 1524 0 125 94 0 94 94 0 8 0 nchpl 144 1875 0 279 60 0 60 60 0 8 0 uvmvnodes 72 1601 0 0 30 0 30 30 0 8 0 vnodes 208 1601 0 0 85 0 85 85 0 8 0 namei 1024 4914 0 4914 1 0 1 1 0 8 1 percpumem 16 34 0 2 1 0 1 1 0 8 0 scxspl 192 5543 0 5543 8 1 7 7 0 8 7 plimitpl 152 41 0 32 1 0 1 1 0 8 0 sigapl 424 331 0 299 4 0 4 4 0 8 0 futexpl 56 1417 0 1416 1 0 1 1 0 8 0 knotepl 112 89 0 70 1 0 1 1 0 8 0 kqueuepl 144 31 0 29 1 0 1 1 0 8 0 pipelkpl 48 92 0 82 1 0 1 1 0 8 0 pipepl 120 184 0 165 1 0 1 1 0 8 0 fdescpl 496 315 0 299 3 0 3 3 0 8 0 filepl 152 1796 0 1696 5 0 5 5 0 8 0 lockfpl 104 22 0 21 1 0 1 1 0 8 0 lockfspl 48 9 0 8 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 196 0 187 1 0 1 1 0 8 0 zombiepl 144 299 0 298 1 0 1 1 0 8 0 processpl 984 331 0 298 5 0 5 5 0 8 0 procpl 624 536 0 493 4 0 4 4 0 8 0 sosppl 128 7 0 7 1 0 1 1 0 8 1 sockpl 400 408 0 389 4 1 3 4 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 160 0 0 19 0 19 19 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 494 0 0 31 0 31 31 0 8 0 bufpl 280 4074 0 165 280 0 280 280 0 8 0 anonpl 16 44051 0 36104 43 1 42 42 0 124 8 amapchunkpl 152 1961 0 1844 8 0 8 8 0 158 2 amappl16 192 1148 0 714 30 3 27 30 0 8 5 amappl15 184 2 0 1 1 0 1 1 0 8 0 amappl14 176 50 0 46 2 1 1 1 0 8 0 amappl13 168 39 0 36 1 0 1 1 0 8 0 amappl12 160 14 0 14 2 2 0 1 0 8 0 amappl11 152 92 0 80 1 0 1 1 0 8 0 amappl10 144 15 0 9 1 0 1 1 0 8 0 amappl9 136 414 0 408 1 0 1 1 0 8 0 amappl8 128 326 0 308 1 0 1 1 0 8 0 amappl7 120 121 0 107 1 0 1 1 0 8 0 amappl6 112 44 0 41 1 0 1 1 0 8 0 amappl5 104 154 0 143 1 0 1 1 0 8 0 amappl4 96 530 0 497 1 0 1 1 0 8 0 amappl3 88 146 0 138 1 0 1 1 0 8 0 amappl2 80 1499 0 1425 3 1 2 3 0 8 0 amappl1 72 16729 0 16269 24 13 11 20 0 8 1 amappl 80 786 0 742 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 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 315 0 298 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 315 0 298 1 0 1 1 0 8 0 vmmpekpl 168 6355 0 6324 2 0 2 2 0 8 0 vmmpepl 168 45123 0 43385 93 4 89 90 0 357 13 vmsppl 368 314 0 298 2 0 2 2 0 8 0 pdppl 4096 638 0 596 6 0 6 6 0 8 0 pvpl 32 151326 0 139684 115 0 115 115 0 265 21 pmappl 232 314 0 298 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 183 0 3 6 0 6 6 0 8 0