l<i_lock) 2nd 0xfffffd807a595bd8 fdlock (&newfdp->fd_fd.fd_lock) lock order "&newfdp->fd_fd.fd_lock"(rwlock) -> "&ip->i_lock"(rrwlock) first seen at: #0 witness_checkorder+0x6a7 sys/kern/subr_witness.c:879 #1 rw_enter+0xd1 sys/kern/kern_rwlock.c:247 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602 #4 vn_closefile+0x119 vn_lock sys/kern/vfs_vnops.c:561 [inline] #4 vn_closefile+0x119 vn_close sys/kern/vfs_vnops.c:288 [inline] #4 vn_closefile+0x119 sys/kern/vfs_vnops.c:587 #5 fdrop+0xc9 sys/kern/kern_descrip.c:1273 #6 closef+0x11d sys/kern/kern_descrip.c:1257 #7 finishdup+0x2b6 sys/kern/kern_descrip.c:686 #8 dodup3+0x5c5 sys/kern/kern_descrip.c:377 #9 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 lock order "&ip->i_lock"(rrwlock) -> "&newfdp->fd_fd.fd_lock"(rwlock) first seen at: #0 witness_checkorder+0x6a7 sys/kern/subr_witness.c:879 #1 rw_enter_write+0x5b sys/kern/kern_rwlock.c:125 #2 diskmapioctl+0x237 sys/dev/diskmap.c:106 #3 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290 #4 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 #5 sys_ioctl+0x5b8 #6 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #6 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #7 Xsyscall+0x128 Stopped at db_enter+0x18: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 witness_checkorder(fffffd807a595bd8,9,0) at witness_checkorder+0xffc witness_debugger sys/kern/subr_witness.c:2506 [inline] witness_checkorder(fffffd807a595bd8,9,0) at witness_checkorder+0xffc sys/kern/subr_witness.c:1086 rw_enter_write(fffffd807a595bc8) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:125 diskmapioctl(5a00,c0106477,ffff800021b451e0,1,ffff800020ab13d8) at diskmapioctl+0x237 sys/dev/diskmap.c:106 VOP_IOCTL(fffffd806fa71648,c0106477,ffff800021b451e0,1,fffffd807f7c6960,ffff800020ab13d8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290 vn_ioctl(fffffd807e777610,c0106477,ffff800021b451e0,ffff800020ab13d8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 sys_ioctl(ffff800020ab13d8,ffff800021b452f8,ffff800021b45360) at sys_ioctl+0x5b8 syscall(ffff800021b453d0) at syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b453d0) at syscall+0x552 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff1b,0,3,ee55fab3010) at Xsyscall+0x128 end of kernel end trace frame: 0xee7dd255420, count: -9 ddb{0}> show registers rdi 0x3 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff800021b44da0 rbx 0x3 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff800022b6c000 rax 0xffff800000adccc0 r8 0xffffffff81c43405 witness_checkorder+0xfd5 r9 0x5 r10 0x3 r11 0xe55b3e2e4d6801a9 r12 0xfffffd80029b9c00 r13 0 r14 0xffffffff825d62c0 w_lodata+0x47490 r15 0xffffffff825e2ef0 w_lodata+0x540c0 rip 0xffffffff8195cff8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021b44d90 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=230089 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab0508,0xffff800020ab0790 process=0xffff800020adc380 user=0xffff800021b40000, vmspace=0xfffffd807f00c450 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 50029 369449 20171 0 7 0 syz-executor.0 *50029 230089 20171 0 7 0x4000000 syz-executor.0 50029 523918 20171 0 2 0x4000000 syz-executor.0 50029 515963 20171 0 2 0x4000000 syz-executor.0 11570 169392 3671 0 2 0 syz-executor.1 11570 239529 3671 0 3 0x4000000 inode syz-executor.1 11570 70944 3671 0 3 0x4000080 ttyout syz-executor.1 11570 380110 3671 0 3 0x4000080 fsleep syz-executor.1 20171 430316 86810 0 3 0x82 nanosleep syz-executor.0 36448 336268 0 0 3 0x14200 bored sosplice 3671 12237 86810 0 3 0x82 nanosleep syz-executor.1 86810 110730 32053 0 3 0x82 thrsleep syz-fuzzer 86810 94814 32053 0 3 0x4000082 thrsleep syz-fuzzer 86810 313929 32053 0 3 0x4000082 thrsleep syz-fuzzer 86810 175020 32053 0 3 0x4000082 thrsleep syz-fuzzer 86810 501961 32053 0 3 0x4000082 thrsleep syz-fuzzer 86810 390620 32053 0 3 0x4000082 thrsleep syz-fuzzer 86810 362605 32053 0 3 0x4000082 thrsleep syz-fuzzer 86810 187721 32053 0 3 0x4000082 kqread syz-fuzzer 86810 341677 32053 0 3 0x4000082 thrsleep syz-fuzzer 86810 123946 32053 0 3 0x4000082 thrsleep syz-fuzzer 32053 37462 37948 0 3 0x10008a pause ksh 37948 49904 58204 0 3 0x92 select sshd 52935 478087 1 0 3 0x100083 ttyin getty 58204 454433 1 0 3 0x80 select sshd 66589 438458 96999 74 3 0x100092 bpf pflogd 96999 136754 1 0 3 0x80 netio pflogd 47704 233081 18055 73 3 0x100090 kqread syslogd 18055 376483 1 0 3 0x100082 netio syslogd 51724 158391 1 77 3 0x100090 poll dhclient 40932 486873 1 0 3 0x80 poll dhclient 39131 101191 0 0 2 0x14200 zerothread 95590 401791 0 0 3 0x14200 aiodoned aiodoned 53660 287726 0 0 3 0x14200 syncer update 5607 301217 0 0 3 0x14200 cleaner cleaner 47464 268655 0 0 3 0x14200 reaper reaper 97772 270484 0 0 3 0x14200 pgdaemon pagedaemon 95858 384487 0 0 3 0x14200 bored crynlk 35914 384974 0 0 3 0x14200 bored crypto 20490 64281 0 0 3 0x40014200 acpi0 acpi0 61666 400196 0 0 3 0x40014200 idle1 87420 286623 0 0 3 0x14200 bored softnet 59775 251281 0 0 3 0x14200 bored systqmp 88277 366220 0 0 3 0x14200 bored systq 18742 124337 0 0 3 0x40014200 bored softclock 2024 165841 0 0 3 0x40014200 idle0 66025 433144 0 0 3 0x14200 bored smr 1 414442 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 50029 (syz-executor.0) thread 0xffff800020ab13d8 (230089) exclusive rrwlock inode r = 0 (0xfffffd807ea14f80) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x46d sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602 #4 vn_lock+0x6e sys/kern/vfs_vnops.c:561 #5 spec_open+0x431 sys/kern/spec_vnops.c:159 #6 VOP_OPEN+0x6a sys/kern/vfs_vops.c:153 #7 vn_open+0x495 sys/kern/vfs_vnops.c:174 #8 diskmapioctl+0x18e sys/dev/diskmap.c:91 #9 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290 #10 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 #11 sys_ioctl+0x5b8 #12 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #12 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #13 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff826445e0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 #2 mi_switch+0x38f sys/kern/sched_bsd.c:441 #3 sleep_finish+0x113 sys/kern/kern_synch.c:373 #4 rw_enter+0x366 sys/kern/kern_rwlock.c:282 #5 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #6 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602 #7 vn_lock+0x6e sys/kern/vfs_vnops.c:561 #8 spec_open+0x431 sys/kern/spec_vnops.c:159 #9 VOP_OPEN+0x6a sys/kern/vfs_vops.c:153 #10 vn_open+0x495 sys/kern/vfs_vnops.c:174 #11 diskmapioctl+0x18e sys/dev/diskmap.c:91 #12 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290 #13 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 #14 sys_ioctl+0x5b8 #15 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #15 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #16 Xsyscall+0x128 Process 50029 (syz-executor.0) thread 0xffff800020ab09f8 (515963) exclusive rrwlock inode r = 0 (0xfffffd807ec53f78) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x46d sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602 #4 vn_lock+0x6e sys/kern/vfs_vnops.c:561 #5 vfs_lookup+0xec sys/kern/vfs_lookup.c:418 #6 namei+0x61c sys/kern/vfs_lookup.c:248 #7 vn_open+0xb8 sys/kern/vfs_vnops.c:137 #8 doopenat+0x28e sys/kern/vfs_syscalls.c:1157 #9 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 Process 11570 (syz-executor.1) thread 0xffff800020ab1b40 (239529) exclusive rwlock fdlock r = 0 (0xfffffd807a5959f0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 ptmioctl+0xe7 sys/kern/tty_pty.c:1071 #2 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290 #3 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 #4 sys_ioctl+0x5b8 #5 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #5 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #6 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9577 6449K 7091K 78643K 13751 0 0 pcb 13 8K 8K 78643K 166 0 0 rtable 108 4K 4K 78643K 613 0 0 ifaddr 78 15K 17K 78643K 228 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1524 0 0 iov 0 0K 16K 78643K 121 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1206 76K 77K 78643K 2337 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 18 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 138 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 1323 0 0 sigio 0 0K 0K 78643K 14 0 0 proc 53 50K 71K 78643K 646 0 0 subproc 32 2K 2K 78643K 85 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 134 0 0 in_multi 33 2K 2K 78643K 102 0 0 ether_multi 1 0K 0K 78643K 6 0 0 mrt 0 0K 0K 78643K 10 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 84 371K 371K 78643K 84 0 0 exec 0 0K 1K 78643K 350 0 0 pfkey data 0 0K 4K 78643K 2 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 107 21K 30K 78643K 5183 0 0 UVM aobj 43 3K 3K 78643K 47 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 133 0 0 NDP 18 0K 0K 78643K 66 0 0 temp 214 3556K 4196K 78643K 11953 0 0 kqueue 0 0K 0K 78643K 18 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 12 0 6 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 63 0 61 1 0 1 1 0 8 0 rtentry 112 84 0 40 2 0 2 2 0 8 0 unpcb 120 440 0 430 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 9675 0 9675 2 2 0 1 0 8 0 tcpcb 544 272 0 268 1 0 1 1 0 8 0 inpcb 280 769 0 762 3 2 1 2 0 8 0 rttmr 72 2 0 2 2 2 0 1 0 8 0 ip6q 72 1 0 0 1 0 1 1 0 8 0 nd6 48 15 0 9 1 0 1 1 0 8 0 pkpcb 40 6 0 6 2 2 0 1 0 8 0 ppxss 1128 28 0 28 4 3 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 53 0 23 1 0 1 1 0 8 0 pfstkey 112 53 0 23 1 0 1 1 0 8 0 pfstate 328 53 0 23 3 0 3 3 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 256 344 0 152 13 1 12 13 0 8 0 art_table 32 345 0 152 2 0 2 2 0 8 0 art_node 16 79 0 39 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 136 0 126 1 0 1 1 0 8 0 shmpl 112 45 0 4 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3490 0 2074 47 0 47 47 0 8 0 ffsino 272 3490 0 2074 96 0 96 96 0 8 0 nchpl 144 5509 0 3871 62 0 62 62 0 8 0 uvmvnodes 72 4283 0 0 78 0 78 78 0 8 0 vnodes 200 4283 0 0 226 0 226 226 0 8 0 namei 1024 16996 0 16994 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 4 0 4 2 2 0 1 0 8 0 scxspl 192 15840 0 15840 16 13 3 7 0 8 3 plimitpl 152 137 0 129 1 0 1 1 0 8 0 sigapl 432 1514 0 1498 3 1 2 3 0 8 0 futexpl 56 16744 0 16743 1 0 1 1 0 8 0 knotepl 112 335 0 316 1 0 1 1 0 8 0 kqueuepl 104 315 0 313 1 0 1 1 0 8 0 pipepl 112 872 0 853 3 1 2 2 0 8 1 fdescpl 488 1515 0 1498 3 0 3 3 0 8 0 filepl 152 8939 0 8833 10 3 7 7 0 8 2 lockfpl 104 483 0 483 2 1 1 1 0 8 1 lockfspl 48 167 0 167 2 1 1 1 0 8 1 sessionpl 112 21 0 10 1 0 1 1 0 8 0 pgrppl 48 40 0 29 1 0 1 1 0 8 0 ucredpl 96 1551 0 1542 1 0 1 1 0 8 0 zombiepl 144 1498 0 1498 2 1 1 1 0 8 1 processpl 896 1531 0 1498 4 0 4 4 0 8 0 procpl 632 4205 0 4157 11 6 5 5 0 8 1 srpgc 64 8 0 8 5 5 0 1 0 8 0 sosppl 128 14 0 14 5 4 1 1 0 8 1 sockpl 384 1287 0 1268 6 2 4 4 0 8 2 mcl64k 65536 766 0 0 96 4 92 96 0 8 1 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 9 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 11 0 0 2 0 2 2 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 115 0 0 14 0 14 14 0 8 0 mtagpl 80 25 0 0 1 0 1 1 0 8 0 mbufpl 256 893 0 0 54 0 54 54 0 8 0 bufpl 256 9361 0 2342 439 0 439 439 0 8 0 anonpl 16 178587 0 166113 92 29 63 67 0 124 9 amapchunkpl 152 9234 0 9091 33 26 7 11 0 158 1 amappl16 192 8171 0 7509 84 42 42 46 0 8 8 amappl15 184 626 0 624 1 0 1 1 0 8 0 amappl14 176 697 0 688 1 0 1 1 0 8 0 amappl13 168 399 0 397 3 2 1 1 0 8 0 amappl12 160 18 0 13 1 0 1 1 0 8 0 amappl11 152 70 0 55 1 0 1 1 0 8 0 amappl10 144 83 0 79 1 0 1 1 0 8 0 amappl9 136 646 0 642 1 0 1 1 0 8 0 amappl8 128 190 0 168 1 0 1 1 0 8 0 amappl7 120 50 0 44 1 0 1 1 0 8 0 amappl6 112 79 0 71 1 0 1 1 0 8 0 amappl5 104 161 0 146 1 0 1 1 0 8 0 amappl4 96 1879 0 1849 1 0 1 1 0 8 0 amappl3 88 219 0 209 1 0 1 1 0 8 0 amappl2 80 11631 0 11549 3 1 2 3 0 8 0 amappl1 72 42292 0 41815 27 17 10 20 0 8 0 amappl 80 4546 0 4497 3 1 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 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 46 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1515 0 1498 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1515 0 1498 1 0 1 1 0 8 0 vmmpekpl 168 15503 0 15471 2 0 2 2 0 8 0 vmmpepl 168 189424 0 187490 158 65 93 102 0 357 8 vmsppl 368 1514 0 1498 2 0 2 2 0 8 0 pdppl 4096 3037 0 2996 7 1 6 6 0 8 0 pvpl 32 465474 0 449714 199 42 157 165 0 265 24 pmappl 232 1514 0 1498 2 1 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 736 0 10 21 0 21 21 0 8 0