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 324617 50032 0 0x14000 0x200 0 reaper *371911 10519 0 0x14000 0x200 1K 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(fffffd807efc3340,1,fffffd807f7bfc00,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80713fbab0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80713fbab0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80713fbab0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80713fbab0,0) 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel diagnostic assertion "p == curproc" failed: file "/syzkaller/managers/setuid/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(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(fffffd807efc3340,1,fffffd807f7bfc00,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80713fbab0,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80713fbab0,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80713fbab0,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80713fbab0,0) 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{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020a2d7d0 rbx 0xffff800020a2d880 rdx 0xffff800020a18c30 rcx 0 rax 0 r8 0xffffffff810939af kprintf+0x16f r9 0x1 r10 0x25 r11 0x13b8bd519b78eda3 r12 0x3000000008 r13 0xffff800020a2d7e0 r14 0x100 r15 0x1 rip 0xffffffff81146c58 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d7c0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=371911 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19110,0xffff800020a18760 process=0xffff800020a1a3d8 user=0xffff800020a28000, vmspace=0xffffffff8266bc88 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 87854 462351 34144 32767 3 0x90 nanosleep syz-executor.1 34144 306303 46578 0 3 0x82 wait syz-executor.1 12944 468834 0 0 3 0x14200 bored sosplice 57224 358577 28276 32767 3 0x90 nanosleep syz-executor.0 28276 421783 46578 0 3 0x82 wait syz-executor.0 46578 503066 83130 0 3 0x82 thrsleep syz-fuzzer 46578 261292 83130 0 3 0x4000082 thrsleep syz-fuzzer 46578 213839 83130 0 3 0x4000082 thrsleep syz-fuzzer 46578 332928 83130 0 3 0x4000082 thrsleep syz-fuzzer 46578 494257 83130 0 3 0x4000082 thrsleep syz-fuzzer 46578 52368 83130 0 3 0x4000082 thrsleep syz-fuzzer 46578 266146 83130 0 3 0x4000082 thrsleep syz-fuzzer 46578 1302 83130 0 3 0x4000082 thrsleep syz-fuzzer 46578 452907 83130 0 3 0x4000082 thrsleep syz-fuzzer 46578 73494 83130 0 3 0x4000082 kqread syz-fuzzer 46578 122234 83130 0 3 0x4000082 thrsleep syz-fuzzer 83130 517779 87302 0 3 0x10008a pause ksh 87302 393248 6562 0 3 0x92 select sshd 13122 419337 1 0 3 0x100083 ttyin getty 6562 45109 1 0 3 0x80 select sshd 40139 449602 69145 73 3 0x100090 kqread syslogd 69145 313019 1 0 3 0x100082 netio syslogd 95476 312070 1 77 3 0x100090 poll dhclient 41720 253411 1 0 3 0x80 poll dhclient 11860 81369 0 0 3 0x14200 bored smr 32472 108189 0 0 3 0x14200 pgzero zerothread 48387 145391 0 0 3 0x14200 aiodoned aiodoned 55246 75554 0 0 3 0x14200 syncer update 88584 153277 0 0 3 0x14200 cleaner cleaner 50032 324617 0 0 7 0x14200 reaper 70155 348246 0 0 3 0x14200 pgdaemon pagedaemon 36249 394020 0 0 3 0x14200 bored crynlk 55205 378820 0 0 3 0x14200 bored crypto 45176 403317 0 0 3 0x40014200 acpi0 acpi0 66269 292327 0 0 3 0x40014200 idle1 38065 64369 0 0 3 0x14200 bored softnet 41859 282500 0 0 3 0x14200 bored systqmp *10519 371911 0 0 7 0x14200 systq 76256 57824 0 0 3 0x40014200 bored softclock 88260 456938 0 0 3 0x40014200 idle0 1 262241 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 10519 (systq) thread 0xffff800020a18c30 (371911) exclusive rrwlock inode r = 0 (0xfffffd807ecc45e8) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9466 6331K 6331K 78643K 10561 0 pcb 13 8K 8K 78643K 13 0 rtable 105 3K 3K 78643K 231 0 ifaddr 39 10K 10K 78643K 46 0 counters 43 33K 33K 78643K 45 0 ioctlops 0 0K 2K 78643K 16 0 iov 0 0K 12K 78643K 14 0 mount 1 1K 1K 78643K 1 0 vnodes 1216 76K 76K 78643K 1240 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 1K 1K 78643K 16 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 6 17K 33K 78643K 121 0 proc 48 50K 70K 78643K 402 0 subproc 34 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 6 0 in_multi 33 2K 2K 78643K 44 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 204 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 92 21K 22K 78643K 1175 0 UVM aobj 2 2K 2K 78643K 4 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 7 0K 0K 78643K 12 0 temp 66 3036K 3100K 78643K 2096 0 kqueue 3 4K 8K 78643K 7 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 8 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 25 0 23 1 0 1 1 0 8 0 rtentry 112 56 0 12 2 0 2 2 0 8 0 unpcb 120 67 0 57 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 46 0 42 1 0 1 1 0 8 0 inpcb 280 104 0 97 1 0 1 1 0 8 0 nd6 48 9 0 3 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 233 0 44 12 0 12 12 0 8 0 art_table 32 234 0 44 2 0 2 2 0 8 0 art_node 16 55 0 15 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 2 1 0 1 1 0 8 1 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1532 0 133 46 0 46 46 0 8 0 ffsino 272 1532 0 133 94 0 94 94 0 8 0 nchpl 144 1891 0 293 60 0 60 60 0 8 0 uvmvnodes 72 1592 0 0 29 0 29 29 0 8 0 vnodes 208 1592 0 0 84 0 84 84 0 8 0 namei 1024 4825 0 4825 1 0 1 1 0 8 1 percpumem 16 33 0 1 1 0 1 1 0 8 0 scxspl 192 5502 0 5502 8 1 7 7 0 8 7 plimitpl 152 27 0 18 1 0 1 1 0 8 0 sigapl 424 306 0 275 4 0 4 4 0 8 0 futexpl 56 1268 0 1268 1 0 1 1 0 8 1 knotepl 112 69 0 50 1 0 1 1 0 8 0 kqueuepl 144 20 0 18 1 0 1 1 0 8 0 pipelkpl 48 89 0 79 1 0 1 1 0 8 0 pipepl 120 178 0 159 1 0 1 1 0 8 0 fdescpl 496 290 0 275 3 0 3 3 0 8 1 filepl 152 1553 0 1453 5 0 5 5 0 8 1 lockfpl 104 21 0 20 1 0 1 1 0 8 0 lockfspl 48 8 0 7 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 20 0 10 1 0 1 1 0 8 0 ucredpl 96 103 0 94 1 0 1 1 0 8 0 zombiepl 144 275 0 273 1 0 1 1 0 8 0 processpl 984 306 0 273 5 0 5 5 0 8 0 procpl 624 476 0 433 4 0 4 4 0 8 0 sockpl 400 198 0 179 4 0 4 4 0 8 1 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 145 0 0 18 0 18 18 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 185 0 0 12 0 12 12 0 8 0 bufpl 280 4110 0 165 282 0 282 282 0 8 0 anonpl 16 34833 0 27414 33 1 32 32 0 124 0 amapchunkpl 152 1599 0 1488 10 0 10 10 0 158 5 amappl16 192 785 0 398 20 0 20 20 0 8 0 amappl15 184 9 0 6 1 0 1 1 0 8 0 amappl14 176 64 0 61 2 1 1 1 0 8 0 amappl13 168 30 0 29 1 0 1 1 0 8 0 amappl12 160 5 0 4 1 0 1 1 0 8 0 amappl11 152 63 0 51 1 0 1 1 0 8 0 amappl10 144 10 0 8 1 0 1 1 0 8 0 amappl9 136 400 0 396 1 0 1 1 0 8 0 amappl8 128 296 0 279 1 0 1 1 0 8 0 amappl7 120 118 0 103 1 0 1 1 0 8 0 amappl6 112 22 0 16 1 0 1 1 0 8 0 amappl5 104 164 0 153 1 0 1 1 0 8 0 amappl4 96 492 0 460 1 0 1 1 0 8 0 amappl3 88 141 0 132 1 0 1 1 0 8 0 amappl2 80 1425 0 1362 3 1 2 3 0 8 0 amappl1 72 15615 0 15170 24 8 16 20 0 8 6 amappl 80 703 0 662 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 3 0 2 1 0 1 1 0 8 0 uaddrrnd 24 290 0 274 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 290 0 274 1 0 1 1 0 8 0 vmmpekpl 168 6214 0 6186 2 0 2 2 0 8 0 vmmpepl 168 41420 0 39844 84 6 78 78 0 357 6 vmsppl 368 289 0 274 2 0 2 2 0 8 0 pdppl 4096 588 0 548 6 0 6 6 0 8 0 pvpl 32 133296 0 122766 115 2 113 115 0 265 24 pmappl 232 289 0 274 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 163 0 2 5 0 5 5 0 8 0