login: witness: lock order reversal: 1st 0xfffffd806e8b4470 vmmaplk (&map->lock) 2nd 0xfffffd80672613c8 inode (&ip->i_lock) lock order "&ip->i_lock"(rrwlock) -> "&map->lock"(rwlock) first seen at: #0 witness_checkorder+0x69c witness_lock_order_check sys/kern/subr_witness.c:2441 [inline] #0 witness_checkorder+0x69c sys/kern/subr_witness.c:872 #1 rw_enter+0xd4 #2 vm_map_lock_ln+0x10d sys/uvm/uvm_map.c:5406 #3 uvm_map+0x2da sys/uvm/uvm_map.c:1233 #4 km_alloc+0x18b sys/uvm/uvm_km.c:908 #5 pool_multi_alloc_ni+0xd0 sys/kern/subr_pool.c:1692 #6 pool_p_alloc+0x74 pool_allocator_alloc sys/kern/subr_pool.c:1606 [inline] #6 pool_p_alloc+0x74 sys/kern/subr_pool.c:927 #7 pool_do_get+0x10f sys/kern/subr_pool.c:712 #8 pool_get+0xeb sys/kern/subr_pool.c:581 #9 ufsdirhash_build+0x3ea sys/ufs/ufs/ufs_dirhash.c:180 #10 ufs_lookup+0x2a1 sys/ufs/ufs/ufs_lookup.c:200 #11 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91 #12 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #13 namei+0x63c sys/kern/vfs_lookup.c:249 #14 start_init+0xc9 check_console sys/kern/init_main.c:596 [inline] #14 start_init+0xc9 sys/kern/init_main.c:636 #15 proc_trampoline+0x1c lock order "&map->lock"(rwlock) -> "&ip->i_lock"(rrwlock) first seen at: #0 witness_checkorder+0x69c witness_lock_order_check sys/kern/subr_witness.c:2441 [inline] #0 witness_checkorder+0x69c sys/kern/subr_witness.c:872 #1 rw_enter+0xd4 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 VOP_LOCK+0xf9 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:571 #5 uvn_io+0x2c8 sys/uvm/uvm_vnode.c:1189 #6 uvn_get+0x226 sys/uvm/uvm_vnode.c:1049 #7 uvm_fault+0x11cc sys/uvm/uvm_fault.c:1023 #8 uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295 #9 uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2358 #10 sys_mlock+0x185 sys/uvm/uvm_mmap.c:765 #11 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #11 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #12 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(fffffd80672613c8,9,0) at witness_checkorder+0x1009 witness_debugger sys/kern/subr_witness.c:2504 [inline] witness_checkorder(fffffd80672613c8,9,0) at witness_checkorder+0x1009 sys/kern/subr_witness.c:1086 rw_enter(fffffd80672613b8,81) at rw_enter+0xd4 rrw_enter(fffffd80672613b8,81) at rrw_enter+0x88 sys/kern/kern_rwlock.c:453 VOP_LOCK(fffffd80672f8758,81) at VOP_LOCK+0xf9 sys/kern/vfs_vops.c:615 vn_lock(fffffd80672f8758,81) at vn_lock+0x81 sys/kern/vfs_vnops.c:571 uvn_io(fffffd8067b6b480,ffff800022d71158,1,2,0) at uvn_io+0x2c8 sys/uvm/uvm_vnode.c:1189 uvn_get(fffffd8067b6b480,0,ffff800022d713b0,ffff800022d71344,0,1) at uvn_get+0x226 sys/uvm/uvm_vnode.c:1049 uvm_fault(fffffd806e8b4458,20002000,2,1) at uvm_fault+0x11cc sys/uvm/uvm_fault.c:1023 uvm_fault_wire(fffffd806e8b4458,20002000,20003000,1) at uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295 uvm_map_pageable_wire(fffffd806e8b4458,fffffd807cbc6dc8,fffffd8066e7f380,ffff800020b4e000,0,0) at uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2358 sys_mlock(ffff800020a98508,ffff800022d715a8,ffff800022d715f0) at sys_mlock+0x185 sys/uvm/uvm_mmap.c:765 syscall(ffff800022d71670) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022d71670) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3c9bff83b30, count: -14 ddb{0}> show registers rdi 0x3 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff800022d70dd0 rbx 0x3 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff800020b4e000 rax 0xffff8000009fae80 r8 0xffffffff818af532 witness_checkorder+0xfe2 r9 0x5 r10 0x3 r11 0xd14014a9c44e9e2b r12 0xfffffd800297c200 r13 0 r14 0xffffffff825f90e0 w_lodata+0x4d2c0 r15 0xffffffff826010c0 w_lodata+0x552a0 rip 0xffffffff811551c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022d70dc0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=80772 stat=onproc flags process=10 proc=4000000 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020a998c8,0xffff800020a98790 process=0xffff800020a9b540 user=0xffff800022d6c000, vmspace=0xfffffd806e8b4458 estcpu=0, cpticks=0, pctcpu=0.3 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 79933 217898 42155 32767 2 0x10 syz-executor.0 79933 414144 42155 32767 3 0x4000090 netio syz-executor.0 79933 510020 42155 32767 3 0x4000090 fsleep syz-executor.0 86499 486597 61925 32767 7 0x10 syz-executor.1 *86499 80772 61925 32767 7 0x4000010 syz-executor.1 86499 297778 61925 32767 3 0x4000090 ttyout syz-executor.1 86499 456858 61925 32767 3 0x4000090 ttyout syz-executor.1 86499 212072 61925 32767 2 0x4000010 syz-executor.1 42155 82615 18082 32767 3 0x90 nanosleep syz-executor.0 18082 327043 15500 0 3 0x82 wait syz-executor.0 61925 388558 97488 32767 3 0x90 nanosleep syz-executor.1 97488 260259 15500 0 3 0x82 wait syz-executor.1 4737 243227 0 0 3 0x14200 bored sosplice 15500 518323 22043 0 3 0x82 thrsleep syz-fuzzer 15500 176947 22043 0 3 0x4000082 thrsleep syz-fuzzer 15500 276679 22043 0 3 0x4000082 thrsleep syz-fuzzer 15500 444142 22043 0 3 0x4000082 thrsleep syz-fuzzer 15500 305371 22043 0 3 0x4000082 thrsleep syz-fuzzer 15500 130736 22043 0 3 0x4000082 thrsleep syz-fuzzer 15500 487959 22043 0 3 0x4000082 thrsleep syz-fuzzer 15500 143675 22043 0 3 0x4000082 thrsleep syz-fuzzer 15500 406470 22043 0 3 0x4000082 kqread syz-fuzzer 15500 75431 22043 0 3 0x4000082 thrsleep syz-fuzzer 22043 224339 96060 0 3 0x10008a pause ksh 96060 357211 19886 0 3 0x92 select sshd 70791 507546 1 0 3 0x100083 ttyin getty 19886 27013 1 0 3 0x80 select sshd 98985 220962 30985 73 3 0x100090 kqread syslogd 30985 283353 1 0 3 0x100082 netio syslogd 42527 54031 1 77 3 0x100090 poll dhclient 9842 295360 1 0 3 0x80 poll dhclient 5736 496097 0 0 2 0x14200 zerothread 47201 324516 0 0 3 0x14200 aiodoned aiodoned 8086 426938 0 0 3 0x14200 syncer update 41079 98681 0 0 3 0x14200 cleaner cleaner 89464 223031 0 0 3 0x14200 reaper reaper 84558 46935 0 0 3 0x14200 pgdaemon pagedaemon 29606 248902 0 0 3 0x14200 bored crynlk 73275 320016 0 0 3 0x14200 bored crypto 39379 318111 0 0 3 0x40014200 acpi0 acpi0 18450 373914 0 0 3 0x40014200 idle1 39776 437505 0 0 3 0x14200 bored softnet 55277 178958 0 0 3 0x14200 bored systqmp 53762 227851 0 0 3 0x14200 bored systq 4018 504150 0 0 3 0x40014200 bored softclock 69633 217004 0 0 3 0x40014200 idle0 50369 247137 0 0 3 0x14200 bored smr 1 142617 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 86499 (syz-executor.1) thread 0xffff800020a98508 (80772) shared rwlock vmmaplk r = 0 (0xfffffd806e8b4470) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x10d sys/uvm/uvm_map.c:5406 #3 uvm_map_pageable+0x11d sys/uvm/uvm_map.c:2454 #4 sys_mlock+0x185 sys/uvm/uvm_mmap.c:765 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82660f10) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9468 6332K 6332K 78643K 10567 0 pcb 13 8K 8K 78643K 13 0 rtable 105 3K 3K 78643K 276 0 ifaddr 39 10K 10K 78643K 54 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 2K 78643K 17 0 iov 0 0K 16K 78643K 4 0 mount 1 1K 1K 78643K 1 0 vnodes 1214 76K 76K 78643K 1257 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 12 0K 1K 78643K 29 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 8 25K 33K 78643K 107 0 sigio 0 0K 0K 78643K 2 0 proc 48 50K 70K 78643K 451 0 subproc 34 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 9 0 in_multi 33 2K 2K 78643K 61 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 48 212K 212K 78643K 48 0 exec 0 0K 1K 78643K 212 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 122 31K 31K 78643K 1189 0 UVM aobj 21 2K 2K 78643K 21 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 2 0 NDP 5 0K 0K 78643K 15 0 temp 72 3021K 3086K 78643K 3580 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 11 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 25 0 23 1 0 1 1 0 8 0 rtentry 112 66 0 22 2 0 2 2 0 8 0 unpcb 120 53 0 39 1 0 1 1 0 8 0 syncache 264 8 0 8 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 544 42 0 36 1 0 1 1 0 8 0 inpcb 280 283 0 266 2 0 2 2 0 8 0 nd6 48 8 0 4 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 302 0 90 14 0 14 14 0 8 0 art_table 32 303 0 90 2 0 2 2 0 8 0 art_node 16 65 0 25 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 5 0 5 1 0 1 1 0 8 1 semapl 112 27 0 17 1 0 1 1 0 8 0 shmpl 112 19 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1484 0 83 46 0 46 46 0 8 0 ffsino 272 1484 0 83 94 0 94 94 0 8 0 nchpl 144 1784 0 183 60 0 60 60 0 8 0 uvmvnodes 72 1561 0 0 29 0 29 29 0 8 0 vnodes 208 1561 0 0 83 0 83 83 0 8 0 namei 1024 4645 0 4645 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 4869 0 4869 2 1 1 2 0 8 1 plimitpl 152 26 0 17 1 0 1 1 0 8 0 sigapl 432 272 0 256 3 0 3 3 0 8 1 futexpl 56 1183 0 1182 1 0 1 1 0 8 0 knotepl 112 95 0 76 1 0 1 1 0 8 0 kqueuepl 104 37 0 34 1 0 1 1 0 8 0 pipepl 160 182 0 163 2 0 2 2 0 8 1 fdescpl 488 273 0 256 3 0 3 3 0 8 0 filepl 152 1662 0 1533 5 0 5 5 0 8 0 lockfpl 104 21 0 20 1 0 1 1 0 8 0 lockfspl 48 8 0 7 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 127 0 118 1 0 1 1 0 8 0 zombiepl 144 256 0 256 1 0 1 1 0 8 1 processpl 904 289 0 256 4 0 4 4 0 8 0 procpl 632 409 0 361 5 0 5 5 0 8 0 srpgc 64 4 0 4 1 0 1 1 0 8 1 sosppl 128 3 0 3 1 0 1 1 0 8 1 sockpl 384 361 0 328 4 0 4 4 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 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 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 140 0 0 17 0 17 17 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 197 0 0 12 0 12 12 0 8 0 bufpl 280 6292 0 1326 355 0 355 355 0 8 0 anonpl 16 42862 0 27537 65 1 64 64 0 125 1 amapchunkpl 152 1838 0 1565 11 0 11 11 0 158 0 amappl16 192 1002 0 273 38 0 38 38 0 8 1 amappl15 184 79 0 69 1 0 1 1 0 8 0 amappl14 176 43 0 37 1 0 1 1 0 8 0 amappl13 168 8 0 8 1 0 1 1 0 8 1 amappl12 160 12 0 11 2 1 1 1 0 8 0 amappl11 152 57 0 46 1 0 1 1 0 8 0 amappl10 144 47 0 38 1 0 1 1 0 8 0 amappl9 136 601 0 598 1 0 1 1 0 8 0 amappl8 128 143 0 118 1 0 1 1 0 8 0 amappl7 120 132 0 114 1 0 1 1 0 8 0 amappl6 112 55 0 47 1 0 1 1 0 8 0 amappl5 104 139 0 129 1 0 1 1 0 8 0 amappl4 96 494 0 463 1 0 1 1 0 8 0 amappl3 88 117 0 109 1 0 1 1 0 8 0 amappl2 80 1248 0 1168 3 1 2 3 0 8 0 amappl1 72 15269 0 14794 24 10 14 20 0 8 4 amappl 80 661 0 610 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 20 0 0 1 0 1 1 0 8 0 uaddrrnd 24 273 0 256 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 273 0 256 1 0 1 1 0 8 0 vmmpekpl 168 6050 0 6021 2 0 2 2 0 8 0 vmmpepl 168 41659 0 39552 117 2 115 115 0 357 23 vmsppl 368 272 0 256 2 0 2 2 0 8 0 pdppl 4096 553 0 512 6 0 6 6 0 8 0 pvpl 32 143204 0 124061 162 0 162 162 0 265 6 pmappl 232 272 0 256 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 161 0 2 5 0 5 5 0 8 0