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 161137 82728 0 0x14000 0x200 0 reaper *392146 47224 0 0x14000 0x200 1K 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(fffffd807dbe9c38,3,fffffd807f7bf6c0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8067f44b68,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8067f44b68,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8067f44b68,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8067f44b68,0) 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel diagnostic assertion "p == curproc" failed: file "/syzkaller/managers/multicore/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(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(fffffd807dbe9c38,3,fffffd807f7bf6c0,0) at VOP_CLOSE+0x12f sys/kern/vfs_vops.c:170 vn_closefile(fffffd8067f44b68,0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8067f44b68,0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:614 fdrop(fffffd8067f44b68,0) at fdrop+0xc2 sys/kern/kern_descrip.c:1276 closef(fffffd8067f44b68,0) 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{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020a2d790 rbx 0xffff800020a2d840 rdx 0xffff800020a189c0 rcx 0 rax 0 r8 0xffffffff81e1786f kprintf+0x16f r9 0x1 r10 0x25 r11 0x7a26cf23d8958c72 r12 0x3000000008 r13 0xffff800020a2d7a0 r14 0x100 r15 0x1 rip 0xffffffff81f88cf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a2d780 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systq) pid=392146 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a19110,0xffff800020a18010 process=0xffff800020a1a000 user=0xffff800020a28000, vmspace=0xffffffff82648778 estcpu=0, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 38932 250249 54550 0 3 0x82 nanosleep syz-executor.0 28087 420991 0 0 3 0x14200 bored sosplice 75575 514426 54550 0 3 0x2 biowait syz-executor.1 54550 410462 78810 0 3 0x82 nanosleep syz-fuzzer 54550 400105 78810 0 3 0x4000082 nanosleep syz-fuzzer 54550 454819 78810 0 3 0x4000082 thrsleep syz-fuzzer 54550 459879 78810 0 3 0x4000082 thrsleep syz-fuzzer 54550 347091 78810 0 3 0x4000082 thrsleep syz-fuzzer 54550 408276 78810 0 3 0x4000082 thrsleep syz-fuzzer 54550 302745 78810 0 3 0x4000082 thrsleep syz-fuzzer 54550 369875 78810 0 3 0x4000082 thrsleep syz-fuzzer 54550 511708 78810 0 3 0x4000082 kqread syz-fuzzer 54550 102090 78810 0 3 0x4000082 thrsleep syz-fuzzer 78810 90248 77081 0 3 0x10008a pause ksh 77081 410096 3792 0 3 0x92 select sshd 47487 29797 1 0 3 0x100083 ttyin getty 3792 308313 1 0 3 0x80 select sshd 27210 122204 95848 74 3 0x100092 bpf pflogd 95848 310270 1 0 3 0x80 netio pflogd 49506 13340 96802 73 3 0x100090 kqread syslogd 96802 496720 1 0 3 0x100082 netio syslogd 4726 67683 1 77 3 0x100090 poll dhclient 88097 127908 1 0 3 0x80 poll dhclient 86348 57660 0 0 3 0x14200 bored smr 8996 347979 0 0 2 0x14200 zerothread 99758 362094 0 0 3 0x14200 aiodoned aiodoned 16373 138621 0 0 3 0x14200 syncer update 5135 262403 0 0 3 0x14200 cleaner cleaner 82728 161137 0 0 7 0x14200 reaper 14629 126245 0 0 3 0x14200 pgdaemon pagedaemon 53189 377377 0 0 3 0x14200 bored crynlk 76891 345184 0 0 3 0x14200 bored crypto 50539 251194 0 0 3 0x40014200 acpi0 acpi0 1140 261764 0 0 3 0x40014200 idle1 59380 320929 0 0 3 0x14200 bored softnet 71705 280112 0 0 3 0x14200 bored systqmp *47224 392146 0 0 7 0x14200 systq 9241 497156 0 0 3 0x40014200 bored softclock 41759 289656 0 0 3 0x40014200 idle0 1 327581 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 75575 (syz-executor.1) thread 0xffff800020ac7d58 (514426) exclusive rrwlock inode r = 0 (0xfffffd80645b70a0) #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 vget+0x1c8 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b4394d8) #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 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 Process 47224 (systq) thread 0xffff800020a189c0 (392146) exclusive rrwlock inode r = 0 (0xfffffd80645b7c50) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9512 6535K 6920K 78643K 10982 0 pcb 13 8K 8K 78643K 329 0 rtable 114 4K 4K 78643K 773 0 ifaddr 66 14K 14K 78643K 102 0 counters 43 33K 34K 78643K 55 0 ioctlops 0 0K 4K 78643K 1485 0 iov 0 0K 12K 78643K 26 0 mount 1 1K 1K 78643K 1 0 vnodes 1222 77K 77K 78643K 1351 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 61 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 4 9K 25K 78643K 544 0 sigio 0 0K 0K 78643K 3 0 proc 62 63K 95K 78643K 491 0 subproc 32 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 27 0 in_multi 52 3K 3K 78643K 81 0 ether_multi 1 0K 0K 78643K 7 0 mrt 0 0K 0K 78643K 348 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 1K 78643K 248 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 101 21K 21K 78643K 2477 0 UVM aobj 9 2K 2K 78643K 12 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 28 0 NDP 10 0K 0K 78643K 22 0 temp 92 3038K 3101K 78643K 5154 0 kqueue 3 4K 8K 78643K 14 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 33 0 31 1 0 1 1 0 8 0 rtentry 112 230 0 183 2 0 2 2 0 8 0 unpcb 120 84 0 73 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 129 0 129 1 1 0 1 0 8 0 tcpcb 544 104 0 100 1 0 1 1 0 8 0 inpcb 280 942 0 935 2 0 2 2 0 8 1 rttmr 72 101 0 101 1 0 1 1 0 8 1 nd6 48 11 0 3 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 ppxss 1128 2 0 2 1 1 0 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 29 0 5 1 0 1 1 0 8 0 pfstkey 112 29 0 5 1 0 1 1 0 8 0 pfstate 328 29 0 5 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 241 0 44 13 0 13 13 0 8 0 art_table 32 243 0 44 2 0 2 2 0 8 0 art_node 16 229 0 186 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 4 1 1 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 57 0 47 1 0 1 1 0 8 0 shmpl 112 10 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2052 0 641 46 0 46 46 0 8 0 ffsino 272 2052 0 641 95 0 95 95 0 8 0 nchpl 144 2953 0 1343 61 0 61 61 0 8 0 uvmvnodes 72 2206 0 0 41 0 41 41 0 8 0 vnodes 208 2206 0 0 117 0 117 117 0 8 0 namei 1024 7441 0 7441 1 0 1 1 0 8 1 percpumem 16 38 0 6 1 0 1 1 0 8 0 scxspl 192 8969 0 8968 7 1 6 6 0 8 5 plimitpl 152 23 0 15 1 0 1 1 0 8 0 sigapl 424 757 0 726 4 0 4 4 0 8 0 futexpl 56 6114 0 6114 1 0 1 1 0 8 1 knotepl 112 78 0 59 1 0 1 1 0 8 0 kqueuepl 144 16 0 14 1 0 1 1 0 8 0 pipelkpl 48 124 0 114 1 0 1 1 0 8 0 pipepl 120 248 0 229 1 0 1 1 0 8 0 fdescpl 496 741 0 726 3 0 3 3 0 8 0 filepl 152 3361 0 3259 5 0 5 5 0 8 0 lockfpl 104 74 0 73 1 0 1 1 0 8 0 lockfspl 48 27 0 26 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 46 0 35 1 0 1 1 0 8 0 ucredpl 96 158 0 148 1 0 1 1 0 8 0 zombiepl 144 726 0 725 1 0 1 1 0 8 0 processpl 984 757 0 725 5 0 5 5 0 8 0 procpl 624 1678 0 1636 4 0 4 4 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 4 0 4 1 1 0 1 0 8 0 sockpl 400 1068 0 1048 4 0 4 4 0 8 1 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 155 0 0 19 0 19 19 0 8 0 mtagpl 80 6 0 0 1 0 1 1 0 8 0 mbufpl 256 206 0 0 13 0 13 13 0 8 0 bufpl 280 5065 0 173 350 0 350 350 0 8 0 anonpl 16 72462 0 58376 58 1 57 57 0 124 0 amapchunkpl 152 3581 0 3445 7 0 7 7 0 158 0 amappl16 192 3064 0 2305 39 0 39 39 0 8 0 amappl15 184 2 0 1 2 1 1 1 0 8 0 amappl14 176 204 0 202 3 2 1 1 0 8 0 amappl13 168 31 0 30 1 0 1 1 0 8 0 amappl12 160 252 0 250 2 1 1 1 0 8 0 amappl11 152 81 0 63 1 0 1 1 0 8 0 amappl10 144 72 0 66 1 0 1 1 0 8 0 amappl9 136 390 0 387 1 0 1 1 0 8 0 amappl8 128 325 0 310 1 0 1 1 0 8 0 amappl7 120 176 0 162 1 0 1 1 0 8 0 amappl6 112 26 0 23 1 0 1 1 0 8 0 amappl5 104 439 0 422 1 0 1 1 0 8 0 amappl4 96 722 0 688 2 1 1 2 0 8 0 amappl3 88 322 0 315 1 0 1 1 0 8 0 amappl2 80 5191 0 5120 3 1 2 3 0 8 0 amappl1 72 25509 0 25062 25 15 10 20 0 8 0 amappl 80 1950 0 1905 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 11 0 3 1 0 1 1 0 8 0 uaddrrnd 24 741 0 725 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 741 0 725 1 0 1 1 0 8 0 vmmpekpl 168 8880 0 8850 2 0 2 2 0 8 0 vmmpepl 168 95491 0 93591 115 8 107 110 0 357 19 vmsppl 368 740 0 725 2 0 2 2 0 8 0 pdppl 4096 1490 0 1450 6 0 6 6 0 8 0 pvpl 32 231237 0 213966 149 4 145 145 0 265 4 pmappl 232 740 0 725 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 171 0 3 5 0 5 5 0 8 0