login: witness: lock order reversal: 1st 0xfffffd807f004018 vmmaplk (&map->lock) 2nd 0xfffffd80663df2b8 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 witness_checkorder(fffffd80663df2b8,9,0) at witness_checkorder+0x1009 witness_debugger sys/kern/subr_witness.c:2504 [inline] witness_checkorder(fffffd80663df2b8,9,0) at witness_checkorder+0x1009 sys/kern/subr_witness.c:1086 rw_enter(fffffd80663df2a8,81) at rw_enter+0xd4 rrw_enter(fffffd80663df2a8,81) at rrw_enter+0x88 sys/kern/kern_rwlock.c:453 VOP_LOCK(fffffd806827b838,81) at VOP_LOCK+0xf9 sys/kern/vfs_vops.c:615 vn_lock(fffffd806827b838,81) at vn_lock+0x81 sys/kern/vfs_vnops.c:571 uvn_io(fffffd80673f3840,ffff800024fc93a8,1,2,0) at uvn_io+0x2c8 sys/uvm/uvm_vnode.c:1189 uvn_get(fffffd80673f3840,0,ffff800024fc9600,ffff800024fc9594,0,0) at uvn_get+0x226 sys/uvm/uvm_vnode.c:1049 uvm_fault(fffffd807f004000,20000000,2,2) at uvm_fault+0x11cc sys/uvm/uvm_fault.c:1023 uvm_fault_wire(fffffd807f004000,20000000,20003000,2) at uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295 uvm_map_pageable_wire(fffffd807f004000,fffffd8066e7cd78,fffffd8066e7c598,ffff800022d9e000,0,0) at uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2358 sys_mlock(ffff800020aa0ef0,ffff800024fc97f8,ffff800024fc9840) at sys_mlock+0x185 sys/uvm/uvm_mmap.c:765 syscall(ffff800024fc98c0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800024fc98c0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1926af08fb0, count: -14 ddb{1}> show registers rdi 0x3 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff800024fc9020 rbx 0x3 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff800022d9e000 rax 0xffff800000a00280 r8 0xffffffff81b6af72 witness_checkorder+0xfe2 r9 0x5 r10 0x3 r11 0x232a942046ac9c5f r12 0xfffffd800297b100 r13 0 r14 0xffffffff825f4df0 w_lodata+0x4e080 r15 0xffffffff825fbe00 w_lodata+0x55090 rip 0xffffffff819657f8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800024fc9010 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=82754 stat=onproc flags process=10 proc=4000000 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020aa0298,0xffff800020aa0798 process=0xffff800020aecab0 user=0xffff800024fc4000, vmspace=0xfffffd807f004000 estcpu=26, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 3175 142477 29828 32767 7 0x10 syz-executor.1 * 3175 82754 29828 32767 7 0x4000010 syz-executor.1 3175 146950 29828 32767 3 0x4000090 fsleep syz-executor.1 60667 313905 0 0 3 0x14200 bored sosplice 4167 256024 99335 32767 3 0x90 nanosleep syz-executor.0 99335 367217 41271 0 3 0x82 wait syz-executor.0 29828 386429 98791 32767 3 0x90 nanosleep syz-executor.1 98791 361776 41271 0 3 0x82 wait syz-executor.1 41271 408099 67909 0 3 0x82 thrsleep syz-fuzzer 41271 425499 67909 0 3 0x4000082 thrsleep syz-fuzzer 41271 343791 67909 0 3 0x4000082 kqread syz-fuzzer 41271 169808 67909 0 3 0x4000082 thrsleep syz-fuzzer 41271 419962 67909 0 3 0x4000082 thrsleep syz-fuzzer 41271 12489 67909 0 3 0x4000082 thrsleep syz-fuzzer 41271 509667 67909 0 3 0x4000082 thrsleep syz-fuzzer 41271 142883 67909 0 3 0x4000082 thrsleep syz-fuzzer 41271 390870 67909 0 3 0x4000082 thrsleep syz-fuzzer 41271 307292 67909 0 3 0x4000082 thrsleep syz-fuzzer 67909 464354 95060 0 3 0x10008a pause ksh 95060 458020 68830 0 3 0x92 select sshd 28098 211142 1 0 3 0x100083 ttyin getty 68830 386542 1 0 3 0x80 select sshd 50263 384365 67471 73 3 0x100090 kqread syslogd 67471 100471 1 0 3 0x100082 netio syslogd 56361 329225 1 77 3 0x100090 poll dhclient 27234 191584 1 0 3 0x80 poll dhclient 65258 474847 0 0 3 0x14200 pgzero zerothread 77721 418165 0 0 3 0x14200 aiodoned aiodoned 34693 100942 0 0 3 0x14200 syncer update 49826 303142 0 0 3 0x14200 cleaner cleaner 30785 444804 0 0 3 0x14200 reaper reaper 7297 445793 0 0 3 0x14200 pgdaemon pagedaemon 53160 388619 0 0 3 0x14200 bored crynlk 57147 301658 0 0 3 0x14200 bored crypto 15640 266155 0 0 3 0x14200 bored viomb 27864 137500 0 0 3 0x40014200 acpi0 acpi0 89277 238824 0 0 3 0x40014200 idle1 55232 426038 0 0 3 0x14200 bored softnet 75569 76162 0 0 3 0x14200 bored systqmp 70070 11830 0 0 3 0x14200 bored systq 92854 410136 0 0 3 0x40014200 bored softclock 94521 118394 0 0 3 0x40014200 idle0 90002 215393 0 0 3 0x14200 bored smr 1 487073 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 3175 (syz-executor.1) thread 0xffff800020aa0ef0 (82754) shared rwlock vmmaplk r = 0 (0xfffffd807f004018) #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 (0xffffffff82657328) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9474 6340K 6340K 78643K 10568 0 pcb 13 8K 8K 78643K 13 0 rtable 107 3K 3K 78643K 235 0 ifaddr 39 10K 10K 78643K 46 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 2K 78643K 16 0 mount 1 1K 1K 78643K 1 0 vnodes 1214 76K 76K 78643K 1236 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 7 0K 0K 78643K 11 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1810 197K 290K 78643K 12817 0 file desc 7 21K 33K 78643K 64 0 proc 48 50K 83K 78643K 403 0 subproc 34 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 9 0 in_multi 33 2K 2K 78643K 44 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 30 132K 132K 78643K 30 0 exec 0 0K 1K 78643K 196 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 112 22K 22K 78643K 1021 0 UVM aobj 14 2K 2K 78643K 14 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 7 0K 0K 78643K 12 0 temp 67 3020K 3084K 78643K 3372 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 9 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 21 0 19 1 0 1 1 0 8 0 rtentry 112 56 0 11 2 0 2 2 0 8 0 unpcb 120 45 0 35 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 33 0 33 1 0 1 1 0 8 1 tcpcb 544 15 0 10 1 0 1 1 0 8 0 inpcb 280 63 0 55 2 0 2 2 0 8 1 nd6 48 6 0 2 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 255 0 43 14 0 14 14 0 8 0 art_table 32 256 0 43 2 0 2 2 0 8 0 art_node 16 55 0 14 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 5 0 0 1 0 1 1 0 8 0 shmpl 112 12 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1439 0 37 46 0 46 46 0 8 0 ffsino 272 1439 0 37 94 0 94 94 0 8 0 nchpl 144 1685 0 84 60 0 60 60 0 8 0 uvmvnodes 72 1499 0 0 28 0 28 28 0 8 0 vnodes 208 1499 0 0 79 0 79 79 0 8 0 namei 1024 4222 0 4222 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 4491 0 4491 2 1 1 2 0 8 1 plimitpl 152 18 0 9 1 0 1 1 0 8 0 sigapl 432 232 0 217 3 0 3 3 0 8 1 futexpl 56 393 0 392 1 0 1 1 0 8 0 knotepl 112 68 0 49 1 0 1 1 0 8 0 kqueuepl 104 6 0 4 1 0 1 1 0 8 0 pipepl 160 150 0 131 1 0 1 1 0 8 0 fdescpl 488 233 0 217 3 0 3 3 0 8 0 filepl 152 1207 0 1106 5 0 5 5 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 61 0 52 1 0 1 1 0 8 0 zombiepl 144 217 0 216 1 0 1 1 0 8 0 processpl 904 250 0 216 4 0 4 4 0 8 0 procpl 632 293 0 248 5 0 5 5 0 8 0 srpgc 64 2 0 2 1 0 1 1 0 8 1 sosppl 128 3 0 3 1 0 1 1 0 8 1 sockpl 384 129 0 109 4 0 4 4 0 8 1 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 156 0 0 19 0 19 19 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 176 0 0 11 0 11 11 0 8 0 bufpl 280 6188 0 1326 348 0 348 348 0 8 0 anonpl 16 36106 0 24182 56 0 56 56 0 125 1 amapchunkpl 152 1233 0 1109 8 0 8 8 0 158 2 amappl16 192 897 0 157 39 0 39 39 0 8 1 amappl15 184 59 0 56 1 0 1 1 0 8 0 amappl14 176 39 0 34 1 0 1 1 0 8 0 amappl12 160 4 0 4 1 1 0 1 0 8 0 amappl11 152 58 0 45 1 0 1 1 0 8 0 amappl10 144 12 0 7 1 0 1 1 0 8 0 amappl9 136 579 0 576 1 0 1 1 0 8 0 amappl8 128 132 0 106 1 0 1 1 0 8 0 amappl7 120 98 0 85 1 0 1 1 0 8 0 amappl6 112 63 0 52 1 0 1 1 0 8 0 amappl5 104 130 0 119 1 0 1 1 0 8 0 amappl4 96 455 0 425 1 0 1 1 0 8 0 amappl3 88 115 0 107 1 0 1 1 0 8 0 amappl2 80 989 0 919 3 0 3 3 0 8 1 amappl1 72 14321 0 13870 24 6 18 20 0 8 8 amappl 80 521 0 479 1 0 1 1 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 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 13 0 0 1 0 1 1 0 8 0 uaddrrnd 24 233 0 217 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 233 0 217 1 0 1 1 0 8 0 vmmpekpl 168 5735 0 5707 2 0 2 2 0 8 0 vmmpepl 168 36156 0 34181 119 3 116 116 0 357 24 vmsppl 368 232 0 217 2 0 2 2 0 8 0 pdppl 4096 473 0 434 6 0 6 6 0 8 0 pvpl 32 126897 0 111816 140 0 140 140 0 265 4 pmappl 232 232 0 217 2 0 2 2 0 8 1 extentpl 40 50 0 32 1 0 1 1 0 8 0 phpool 112 162 0 2 5 0 5 5 0 8 0