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 421621 86380 0 0x14000 0x200 1 reaper * 96901 55229 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(fffffd8063ff6d10,1,fffffd807f7bfa80,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80677e9e58,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80677e9e58,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80677e9e58,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80677e9e58,0) 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(fffffd8063ff6d10,1,fffffd807f7bfa80,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd80677e9e58,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80677e9e58,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd80677e9e58,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd80677e9e58,0) 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 0xffff800020a2d110 rbx 0xffff800020a2d1c0 rdx 0xffff800020a18c30 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0xbdc5175c462c11b9 r12 0x3000000008 r13 0xffff800020a2d120 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d100 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=96901 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19110,0xffff800020a184f0 process=0xffff800020a1ab88 user=0xffff800020a28000, vmspace=0xffffffff82648778 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 30633 304709 50410 0 3 0x80 nanosleep syz-executor.0 30633 141373 50410 0 3 0x4000080 fsleep syz-executor.0 30633 81754 50410 0 3 0x4000080 fsleep syz-executor.0 62626 164604 93593 0 2 0x482 syz-executor.1 50410 463493 93593 0 3 0x82 nanosleep syz-executor.0 93593 355328 33310 0 3 0x82 kqread syz-fuzzer 93593 272689 33310 0 3 0x4000082 thrsleep syz-fuzzer 93593 437484 33310 0 3 0x4000082 thrsleep syz-fuzzer 93593 230265 33310 0 3 0x4000082 thrsleep syz-fuzzer 93593 138910 33310 0 3 0x4000082 thrsleep syz-fuzzer 93593 275721 33310 0 3 0x4000082 thrsleep syz-fuzzer 93593 96270 33310 0 3 0x4000082 thrsleep syz-fuzzer 93593 315734 33310 0 3 0x4000082 thrsleep syz-fuzzer 93593 402867 33310 0 3 0x4000082 thrsleep syz-fuzzer 93593 243858 33310 0 3 0x4000082 thrsleep syz-fuzzer 33310 245806 19237 0 3 0x10008a pause ksh 19237 295685 78990 0 3 0x92 select sshd 13701 78112 1 0 3 0x100083 ttyin getty 78990 224125 1 0 3 0x80 select sshd 36340 392823 25867 74 3 0x100092 bpf pflogd 25867 121917 1 0 3 0x80 netio pflogd 24845 10279 32740 73 3 0x100090 kqread syslogd 32740 85778 1 0 3 0x100082 netio syslogd 11777 127229 1 77 3 0x100090 poll dhclient 44328 347433 1 0 3 0x80 poll dhclient 1887 172695 0 0 3 0x14200 bored smr 37494 312853 0 0 3 0x14200 pgzero zerothread 63809 44709 0 0 3 0x14200 aiodoned aiodoned 79325 63177 0 0 3 0x14200 syncer update 16494 207043 0 0 3 0x14200 cleaner cleaner 86380 421621 0 0 7 0x14200 reaper 9066 99631 0 0 3 0x14200 pgdaemon pagedaemon 21019 248061 0 0 3 0x14200 bored crynlk 33028 170060 0 0 3 0x14200 bored crypto 24771 130123 0 0 3 0x40014200 acpi0 acpi0 72389 136307 0 0 3 0x40014200 idle1 99321 453648 0 0 3 0x14200 bored softnet 458 302086 0 0 3 0x14200 bored systqmp *55229 96901 0 0 7 0x14200 systq 53683 63075 0 0 2 0x40014200 softclock 1444 100428 0 0 3 0x40014200 idle0 1 109398 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 55229 (systq) thread 0xffff800020a18c30 (96901) exclusive rrwlock inode r = 0 (0xfffffd8063f871b0) #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 9486 6404K 6669K 78643K 10665 0 pcb 13 8K 8K 78643K 45 0 rtable 105 3K 3K 78643K 225 0 ifaddr 56 12K 12K 78643K 72 0 counters 43 33K 34K 78643K 49 0 ioctlops 0 0K 4K 78643K 1473 0 iov 0 0K 12K 78643K 8 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1246 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 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 87 0 sigio 0 0K 0K 78643K 2 0 proc 60 63K 95K 78643K 446 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 3 0 in_multi 44 2K 2K 78643K 50 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 31 148K 148K 78643K 31 0 exec 0 0K 1K 78643K 209 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 98 21K 21K 78643K 1175 0 UVM aobj 4 2K 2K 78643K 4 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 14 0 NDP 8 0K 0K 78643K 15 0 temp 82 3037K 3102K 78643K 2886 0 kqueue 3 4K 12K 78643K 11 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 23 0 21 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 61 0 49 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 11 0 11 1 1 0 1 0 8 0 tcpcb 544 134 0 126 1 0 1 1 0 8 0 inpcb 280 210 0 201 2 0 2 2 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 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 15 0 0 1 0 1 1 0 8 0 pfstkey 112 15 0 0 1 0 1 1 0 8 0 pfstate 328 15 0 0 2 0 2 2 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 256 189 0 0 12 0 12 12 0 8 0 art_table 32 190 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1504 0 93 46 0 46 46 0 8 0 ffsino 272 1504 0 93 95 0 95 95 0 8 0 nchpl 144 1808 0 189 61 0 61 61 0 8 0 uvmvnodes 72 1564 0 0 29 0 29 29 0 8 0 vnodes 208 1564 0 0 83 0 83 83 0 8 0 namei 1024 4636 0 4636 1 0 1 1 0 8 1 percpumem 16 35 0 3 1 0 1 1 0 8 0 scxspl 192 5413 0 5413 8 1 7 7 0 8 7 plimitpl 152 19 0 11 1 0 1 1 0 8 0 sigapl 424 302 0 271 4 0 4 4 0 8 0 futexpl 56 992 0 990 1 0 1 1 0 8 0 knotepl 112 59 0 40 1 0 1 1 0 8 0 kqueuepl 144 12 0 10 1 0 1 1 0 8 0 pipelkpl 48 76 0 66 1 0 1 1 0 8 0 pipepl 120 152 0 133 1 0 1 1 0 8 0 fdescpl 496 287 0 271 3 0 3 3 0 8 0 filepl 152 1522 0 1417 5 0 5 5 0 8 0 lockfpl 104 19 0 18 1 0 1 1 0 8 0 lockfspl 48 8 0 7 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 75 0 65 1 0 1 1 0 8 0 zombiepl 144 271 0 270 1 0 1 1 0 8 0 processpl 984 302 0 270 5 0 5 5 0 8 0 procpl 624 432 0 389 4 0 4 4 0 8 0 sockpl 400 294 0 271 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 mcl9k 9216 3 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 mcl2k 2048 150 0 0 18 0 18 18 0 8 0 mtagpl 80 4 0 0 1 0 1 1 0 8 0 mbufpl 256 175 0 0 10 0 10 10 0 8 0 bufpl 280 4166 0 174 286 0 286 286 0 8 0 anonpl 16 40279 0 26021 59 1 58 58 0 124 0 amapchunkpl 152 1344 0 1201 8 0 8 8 0 158 1 amappl16 192 1106 0 337 39 0 39 39 0 8 0 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 2 0 1 2 1 1 1 0 8 0 amappl13 168 63 0 58 1 0 1 1 0 8 0 amappl12 160 12 0 10 1 0 1 1 0 8 0 amappl11 152 71 0 53 1 0 1 1 0 8 0 amappl10 144 50 0 45 1 0 1 1 0 8 0 amappl9 136 384 0 381 1 0 1 1 0 8 0 amappl8 128 296 0 282 1 0 1 1 0 8 0 amappl7 120 146 0 134 1 0 1 1 0 8 0 amappl6 112 26 0 21 1 0 1 1 0 8 0 amappl5 104 192 0 176 1 0 1 1 0 8 0 amappl4 96 528 0 497 2 1 1 2 0 8 0 amappl3 88 117 0 110 1 0 1 1 0 8 0 amappl2 80 1366 0 1288 3 1 2 3 0 8 0 amappl1 72 16325 0 15861 25 11 14 20 0 8 4 amappl 80 683 0 635 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 287 0 270 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 287 0 270 1 0 1 1 0 8 0 vmmpekpl 168 6095 0 6064 2 0 2 2 0 8 0 vmmpepl 168 41790 0 39771 112 7 105 105 0 357 17 vmsppl 368 286 0 270 2 0 2 2 0 8 0 pdppl 4096 582 0 540 6 0 6 6 0 8 0 pvpl 32 142077 0 124625 144 0 144 144 0 265 3 pmappl 232 286 0 270 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 164 0 3 5 0 5 5 0 8 0