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 348903 80491 0 0x14000 0x200 1 reaper *145136 9645 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(fffffd8066d47b80,1,fffffd807f7bf960,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806cc35568,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806cc35568,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806cc35568,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806cc35568,0) 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(fffffd8066d47b80,1,fffffd807f7bf960,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd806cc35568,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806cc35568,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd806cc35568,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd806cc35568,0) 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 0xffff800020a2d580 rbx 0xffff800020a2d630 rdx 0xffff800020a195f0 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0xe42e7e7b615f2e58 r12 0x3000000008 r13 0xffff800020a2d590 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d570 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (systq) pid=145136 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19860,0xffff800020a19390 process=0xffff800020a1a000 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 24804 362699 46348 0 2 0 syz-executor.0 24804 523967 46348 0 2 0x4000000 syz-executor.0 33303 379105 0 0 3 0x14200 bored sosplice 31715 222699 23801 0 3 0x82 nanosleep syz-executor.1 46348 290465 23801 0 2 0x482 syz-executor.0 23801 22697 39042 0 3 0x82 thrsleep syz-fuzzer 23801 411675 39042 0 3 0x4000082 thrsleep syz-fuzzer 23801 486474 39042 0 3 0x4000082 thrsleep syz-fuzzer 23801 210264 39042 0 3 0x4000082 thrsleep syz-fuzzer 23801 236389 39042 0 3 0x4000082 thrsleep syz-fuzzer 23801 220528 39042 0 3 0x4000082 kqread syz-fuzzer 23801 403468 39042 0 3 0x4000082 thrsleep syz-fuzzer 23801 491074 39042 0 3 0x4000082 thrsleep syz-fuzzer 23801 395298 39042 0 3 0x4000082 thrsleep syz-fuzzer 23801 172218 39042 0 3 0x4000082 thrsleep syz-fuzzer 39042 214499 3946 0 3 0x10008a pause ksh 3946 512254 34513 0 3 0x92 select sshd 47053 354476 1 0 3 0x100083 ttyin getty 34513 114097 1 0 3 0x80 select sshd 53429 235550 67508 74 3 0x100092 bpf pflogd 67508 175854 1 0 3 0x80 netio pflogd 88433 266307 90658 73 3 0x100090 kqread syslogd 90658 456928 1 0 3 0x100082 netio syslogd 89358 191413 1 77 3 0x100090 poll dhclient 83914 143523 1 0 3 0x80 poll dhclient 97136 85389 0 0 2 0x14200 smr 95889 156099 0 0 2 0x14200 zerothread 85036 209977 0 0 3 0x14200 aiodoned aiodoned 33602 63371 0 0 3 0x14200 syncer update 56912 153311 0 0 3 0x14200 cleaner cleaner 80491 348903 0 0 7 0x14200 reaper 62213 193687 0 0 3 0x14200 pgdaemon pagedaemon 53204 459338 0 0 3 0x14200 bored crynlk 74958 258534 0 0 3 0x14200 bored crypto 75761 12227 0 0 3 0x40014200 acpi0 acpi0 13290 147089 0 0 3 0x40014200 idle1 40240 367523 0 0 3 0x14200 bored softnet 85363 386107 0 0 3 0x14200 bored systqmp * 9645 145136 0 0 7 0x14200 systq 33966 315204 0 0 3 0x40014200 bored softclock 98761 351398 0 0 3 0x40014200 idle0 1 172478 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 24804 (syz-executor.0) thread 0xffff800020ac6288 (523967) exclusive rrwlock inode r = 0 (0xfffffd80662224e0) #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 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_makeinode+0xaa sys/ufs/ufs/ufs_vnops.c:1830 #7 ufs_create+0x41 sys/ufs/ufs/ufs_vnops.c:152 #8 VOP_CREATE+0xc0 sys/kern/vfs_vops.c:112 #9 vn_open+0x2a4 sys/kern/vfs_vnops.c:122 #10 doopenat+0x28b sys/kern/vfs_syscalls.c:1141 #11 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8066222f80) #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 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 vn_open+0x1a6 sys/kern/vfs_vnops.c:113 #8 doopenat+0x28b sys/kern/vfs_syscalls.c:1141 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #10 Xsyscall+0x128 Process 9645 (systq) thread 0xffff800020a195f0 (145136) exclusive rrwlock inode r = 0 (0xfffffd8066222d60) #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 9492 6468K 7174K 78643K 11158 0 pcb 13 8K 8K 78643K 55 0 rtable 80 3K 3K 78643K 246 0 ifaddr 53 11K 11K 78643K 70 0 counters 43 33K 34K 78643K 47 0 ioctlops 0 0K 4K 78643K 1475 0 iov 0 0K 12K 78643K 110 0 mount 1 1K 1K 78643K 1 0 vnodes 1226 77K 77K 78643K 1364 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 11 1K 1K 78643K 21 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 274 0 sigio 0 0K 0K 78643K 2 0 proc 61 63K 95K 78643K 445 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 20 0 in_multi 33 2K 2K 78643K 66 0 ether_multi 1 0K 0K 78643K 7 0 mrt 0 0K 0K 78643K 4 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 470 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 99 21K 25K 78643K 1685 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 27 0 NDP 8 0K 0K 78643K 15 0 temp 85 3037K 3104K 78643K 11069 0 kqueue 3 4K 18K 78643K 21 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 31 0 29 1 0 1 1 0 8 0 rtentry 112 51 0 21 2 0 2 2 0 8 0 unpcb 120 111 0 99 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 304 0 304 1 1 0 1 0 8 0 tcpcb 544 135 0 131 2 1 1 2 0 8 0 inpcb 280 369 0 362 2 0 2 2 0 8 1 rttmr 72 2 0 2 1 0 1 1 0 8 1 nd6 48 7 0 3 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrag 232 3 0 3 2 1 1 1 0 482 1 pffrnode 88 3 0 3 2 1 1 1 0 8 1 pffrent 40 92 0 92 2 1 1 1 0 8 1 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 28 0 4 1 0 1 1 0 8 0 pfstkey 112 28 0 4 1 0 1 1 0 8 0 pfstate 328 28 0 4 2 0 2 2 0 8 0 pfrule 1360 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 243 0 112 13 1 12 13 0 8 0 art_table 32 244 0 112 2 0 2 2 0 8 0 art_node 16 50 0 23 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 1 1 0 1 0 8 0 semupl 112 7 0 7 2 1 1 1 0 8 1 semapl 112 11 0 2 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 1922 0 511 46 0 46 46 0 8 0 ffsino 272 1922 0 511 95 0 95 95 0 8 0 nchpl 144 2627 0 1008 61 0 61 61 0 8 0 uvmvnodes 72 2088 0 0 38 0 38 38 0 8 0 vnodes 208 2088 0 0 110 0 110 110 0 8 0 namei 1024 6679 0 6678 1 0 1 1 0 8 0 percpumem 16 34 0 2 1 0 1 1 0 8 0 scxspl 192 12212 0 12212 8 5 3 7 0 8 3 plimitpl 152 24 0 16 1 0 1 1 0 8 0 sigapl 424 490 0 458 4 0 4 4 0 8 0 futexpl 56 4105 0 4105 1 0 1 1 0 8 1 knotepl 112 80 0 61 1 0 1 1 0 8 0 kqueuepl 144 41 0 39 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 496 474 0 458 3 0 3 3 0 8 0 filepl 152 2654 0 2549 6 1 5 6 0 8 0 lockfpl 104 36 0 35 1 0 1 1 0 8 0 lockfspl 48 14 0 13 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 96 111 0 102 1 0 1 1 0 8 0 zombiepl 144 458 0 457 1 0 1 1 0 8 0 processpl 984 490 0 457 5 0 5 5 0 8 0 procpl 624 920 0 877 4 0 4 4 0 8 0 sockpl 400 511 0 490 7 2 5 5 0 8 2 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 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 72 0 0 2 0 2 2 0 8 0 mbufpl 256 382 0 0 24 0 24 24 0 8 0 bufpl 280 8873 0 2606 448 0 448 448 0 8 0 anonpl 16 75755 0 62001 72 6 66 71 0 124 9 amapchunkpl 152 2765 0 2616 20 5 15 20 0 158 7 amappl16 192 3401 0 2673 48 10 38 48 0 8 0 amappl15 184 131 0 129 2 1 1 1 0 8 0 amappl14 176 2 0 2 2 2 0 1 0 8 0 amappl13 168 34 0 32 1 0 1 1 0 8 0 amappl12 160 6 0 6 1 1 0 1 0 8 0 amappl11 152 76 0 58 1 0 1 1 0 8 0 amappl10 144 141 0 132 1 0 1 1 0 8 0 amappl9 136 388 0 385 1 0 1 1 0 8 0 amappl8 128 308 0 294 1 0 1 1 0 8 0 amappl7 120 232 0 218 1 0 1 1 0 8 0 amappl6 112 26 0 22 1 0 1 1 0 8 0 amappl5 104 373 0 357 1 0 1 1 0 8 0 amappl4 96 499 0 471 1 0 1 1 0 8 0 amappl3 88 112 0 105 1 0 1 1 0 8 0 amappl2 80 3005 0 2926 3 1 2 3 0 8 0 amappl1 72 19611 0 19149 25 15 10 20 0 8 0 amappl 80 1181 0 1133 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 24 474 0 457 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 474 0 457 1 0 1 1 0 8 0 vmmpekpl 168 7071 0 7037 2 0 2 2 0 8 0 vmmpepl 168 64451 0 62478 104 13 91 99 0 357 5 vmsppl 368 473 0 457 2 0 2 2 0 8 0 pdppl 4096 956 0 914 6 0 6 6 0 8 0 pvpl 32 245763 0 228784 173 5 168 173 0 265 29 pmappl 232 473 0 457 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 184 0 6 6 0 6 6 0 8 0