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 257923 13567 0 0x14000 0x200 0 reaper *438676 5268 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(fffffd807efc3410,1,fffffd807f7bf7e0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80692ff908,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80692ff908,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80692ff908,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80692ff908,0) 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(fffffd807efc3410,1,fffffd807f7bf7e0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80692ff908,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80692ff908,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80692ff908,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80692ff908,0) 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 0xffff800020a2cf50 rbx 0xffff800020a2d000 rdx 0xffff800020a189c0 rcx 0 rax 0 r8 0xffffffff810939af kprintf+0x16f r9 0x1 r10 0x25 r11 0xbe2233ca44b5ae68 r12 0x3000000008 r13 0xffff800020a2cf60 r14 0x100 r15 0x1 rip 0xffffffff81146c58 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2cf40 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=438676 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19110,0xffff800020a18760 process=0xffff800020a1a7b0 user=0xffff800020a28000, vmspace=0xffffffff8266bc88 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 83711 383951 10120 32767 2 0x10 syz-executor.0 83711 506435 10120 32767 2 0x4000010 syz-executor.0 86449 371783 17753 32767 3 0x90 nanosleep syz-executor.1 17753 143957 61117 0 3 0x82 wait syz-executor.1 10120 97478 79058 32767 3 0x90 nanosleep syz-executor.0 79058 332334 61117 0 3 0x82 wait syz-executor.0 53458 475126 0 0 3 0x14200 bored sosplice 61117 285685 52187 0 3 0x82 thrsleep syz-fuzzer 61117 202228 52187 0 3 0x4000082 thrsleep syz-fuzzer 61117 86038 52187 0 3 0x4000082 thrsleep syz-fuzzer 61117 271371 52187 0 3 0x4000082 thrsleep syz-fuzzer 61117 356208 52187 0 3 0x4000082 thrsleep syz-fuzzer 61117 83316 52187 0 3 0x4000082 kqread syz-fuzzer 61117 61113 52187 0 3 0x4000082 thrsleep syz-fuzzer 61117 508281 52187 0 3 0x4000082 thrsleep syz-fuzzer 61117 440060 52187 0 3 0x4000082 thrsleep syz-fuzzer 61117 24556 52187 0 3 0x4000082 thrsleep syz-fuzzer 52187 446483 20700 0 3 0x10008a pause ksh 20700 319987 21353 0 3 0x92 select sshd 45474 486506 1 0 3 0x100083 ttyin getty 21353 366264 1 0 3 0x80 select sshd 56091 230870 710 73 3 0x100090 kqread syslogd 710 291439 1 0 3 0x100082 netio syslogd 13837 513501 1 77 3 0x100090 poll dhclient 230 478885 1 0 3 0x80 poll dhclient 96573 331755 0 0 3 0x14200 bored smr 55770 281331 0 0 2 0x14200 zerothread 7833 265987 0 0 3 0x14200 aiodoned aiodoned 97267 309513 0 0 3 0x14200 syncer update 12492 318789 0 0 3 0x14200 cleaner cleaner 13567 257923 0 0 7 0x14200 reaper 26392 74412 0 0 3 0x14200 pgdaemon pagedaemon 3306 496198 0 0 3 0x14200 bored crynlk 91975 398680 0 0 3 0x14200 bored crypto 72748 44179 0 0 3 0x40014200 acpi0 acpi0 42772 262503 0 0 3 0x40014200 idle1 56539 62121 0 0 3 0x14200 bored softnet 54705 395086 0 0 3 0x14200 bored systqmp * 5268 438676 0 0 7 0x14200 systq 94201 507466 0 0 3 0x40014200 bored softclock 28844 416084 0 0 3 0x40014200 idle0 1 506437 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 5268 (systq) thread 0xffff800020a189c0 (438676) 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 9470 6332K 6332K 78643K 10585 0 pcb 13 8K 8K 78643K 13 0 rtable 105 3K 3K 78643K 439 0 ifaddr 39 10K 10K 78643K 83 0 counters 43 33K 33K 78643K 55 0 ioctlops 0 0K 2K 78643K 28 0 iov 0 0K 16K 78643K 21 0 mount 1 1K 1K 78643K 1 0 vnodes 1216 76K 76K 78643K 1425 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 10 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 47 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 7 21K 33K 78643K 287 0 proc 48 50K 70K 78643K 653 0 subproc 34 2K 2K 78643K 136 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 10 0 in_multi 33 2K 2K 78643K 99 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 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 274 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 36K 78643K 1774 0 UVM aobj 14 2K 2K 78643K 22 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 23 0 NDP 7 0K 0K 78643K 27 0 temp 65 3036K 3100K 78643K 2978 0 kqueue 3 4K 10K 78643K 30 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 18 0 12 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 45 0 43 1 0 1 1 0 8 0 rtentry 112 111 0 67 2 0 2 2 0 8 0 unpcb 120 119 0 109 1 0 1 1 0 8 0 syncache 264 11 0 11 2 1 1 1 0 8 1 tcpqe 32 181 0 181 1 1 0 1 0 8 0 tcpcb 544 117 0 109 1 0 1 1 0 8 0 inpcb 280 239 0 232 2 0 2 2 0 8 1 nd6 48 24 0 18 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 456 0 268 12 0 12 12 0 8 0 art_table 32 457 0 268 2 0 2 2 0 8 0 art_node 16 110 0 70 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 5 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 45 0 35 1 0 1 1 0 8 0 shmpl 112 20 0 8 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1725 0 326 46 0 46 46 0 8 0 ffsino 272 1725 0 326 94 0 94 94 0 8 0 nchpl 144 2214 0 618 60 0 60 60 0 8 0 uvmvnodes 72 1870 0 0 34 0 34 34 0 8 0 vnodes 208 1870 0 0 99 0 99 99 0 8 0 namei 1024 7543 0 7543 1 0 1 1 0 8 1 percpumem 16 38 0 6 1 0 1 1 0 8 0 scxspl 192 6196 0 6196 8 5 3 7 0 8 3 plimitpl 152 59 0 50 1 0 1 1 0 8 0 sigapl 424 457 0 425 4 0 4 4 0 8 0 futexpl 56 3036 0 3036 1 0 1 1 0 8 1 knotepl 112 163 0 144 1 0 1 1 0 8 0 kqueuepl 144 44 0 42 1 0 1 1 0 8 0 pipelkpl 48 118 0 108 1 0 1 1 0 8 0 pipepl 120 236 0 217 1 0 1 1 0 8 0 fdescpl 496 441 0 425 3 0 3 3 0 8 0 filepl 152 3393 0 3293 5 0 5 5 0 8 0 lockfpl 104 19 0 18 1 0 1 1 0 8 0 lockfspl 48 9 0 8 1 0 1 1 0 8 0 sessionpl 112 23 0 13 1 0 1 1 0 8 0 pgrppl 48 24 0 13 1 0 1 1 0 8 0 ucredpl 96 1354 0 1345 1 0 1 1 0 8 0 zombiepl 144 425 0 424 1 0 1 1 0 8 0 processpl 984 457 0 424 5 0 5 5 0 8 0 procpl 624 849 0 806 4 0 4 4 0 8 0 sosppl 128 4 0 4 1 0 1 1 0 8 1 sockpl 400 407 0 387 3 0 3 3 0 8 0 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 159 0 0 19 0 19 19 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 193 0 0 12 0 12 12 0 8 0 bufpl 280 4235 0 165 291 0 291 291 0 8 0 anonpl 16 56039 0 49659 49 1 48 48 0 124 13 amapchunkpl 152 3836 0 3720 19 0 19 19 0 158 13 amappl16 192 1516 0 1086 33 3 30 33 0 8 8 amappl15 184 2 0 2 2 2 0 1 0 8 0 amappl14 176 29 0 26 2 1 1 1 0 8 0 amappl13 168 72 0 71 1 0 1 1 0 8 0 amappl12 160 22 0 17 2 1 1 1 0 8 0 amappl11 152 95 0 80 1 0 1 1 0 8 0 amappl10 144 108 0 102 1 0 1 1 0 8 0 amappl9 136 450 0 443 1 0 1 1 0 8 0 amappl8 128 433 0 412 1 0 1 1 0 8 0 amappl7 120 231 0 218 1 0 1 1 0 8 0 amappl6 112 29 0 25 1 0 1 1 0 8 0 amappl5 104 326 0 312 1 0 1 1 0 8 0 amappl4 96 539 0 508 2 1 1 2 0 8 0 amappl3 88 110 0 104 1 0 1 1 0 8 0 amappl2 80 2209 0 2136 3 1 2 3 0 8 0 amappl1 72 19877 0 19412 24 14 10 20 0 8 0 amappl 80 1162 0 1118 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 21 0 8 1 0 1 1 0 8 0 uaddrrnd 24 441 0 424 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 441 0 424 1 0 1 1 0 8 0 vmmpekpl 168 7291 0 7259 2 0 2 2 0 8 0 vmmpepl 168 61317 0 59563 91 4 87 87 0 357 10 vmsppl 368 440 0 424 2 0 2 2 0 8 0 pdppl 4096 890 0 848 6 0 6 6 0 8 0 pvpl 32 186456 0 176844 130 4 126 126 0 265 32 pmappl 232 440 0 424 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 164 0 2 5 0 5 5 0 8 0