witness: lock order reversal: 1st 0xfffffd806e8b5300 vmmaplk (&map->lock) 2nd 0xfffffd806b489708 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_mlockall+0x6a sys/uvm/uvm_mmap.c:826 #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(fffffd806b489708,9,0) at witness_checkorder+0x1009 witness_debugger sys/kern/subr_witness.c:2504 [inline] witness_checkorder(fffffd806b489708,9,0) at witness_checkorder+0x1009 sys/kern/subr_witness.c:1086 rw_enter(fffffd806b4896f8,81) at rw_enter+0xd4 rrw_enter(fffffd806b4896f8,81) at rrw_enter+0x88 sys/kern/kern_rwlock.c:453 VOP_LOCK(fffffd806b42c1c0,81) at VOP_LOCK+0xf9 sys/kern/vfs_vops.c:615 vn_lock(fffffd806b42c1c0,81) at vn_lock+0x81 sys/kern/vfs_vnops.c:571 uvn_io(fffffd806dc4b8c0,ffff800022d598d8,1,2,0) at uvn_io+0x2c8 sys/uvm/uvm_vnode.c:1189 uvn_get(fffffd806dc4b8c0,32000,ffff800022d59b30,ffff800022d59ac4,0,3) at uvn_get+0x226 sys/uvm/uvm_vnode.c:1049 uvm_fault(fffffd806e8b52e8,1b33a52000,2,3) at uvm_fault+0x11cc sys/uvm/uvm_fault.c:1023 uvm_fault_wire(fffffd806e8b52e8,1b33a20000,1b34a20000,3) at uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295 uvm_map_pageable_wire(fffffd806e8b52e8,fffffd80652b5a48,0,ffff800022d90000,ffffffff81504e90,0) at uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2358 sys_mlockall(ffff800020ac1160,ffff800022d59d18,ffff800022d59d60) at sys_mlockall+0x6a sys/uvm/uvm_mmap.c:826 syscall(ffff800022d59de0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022d59de0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6aac0709640, count: -14 ddb{1}> show registers rdi 0x3 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff800022d59550 rbx 0x3 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff800022d90000 rax 0xffff8000009fd2c0 r8 0xffffffff818af532 witness_checkorder+0xfe2 r9 0x5 r10 0x3 r11 0x6b6974edb3fa677c r12 0xfffffd800297c200 r13 0 r14 0xffffffff825e9d80 w_lodata+0x3df60 r15 0xffffffff826010c0 w_lodata+0x552a0 rip 0xffffffff811551c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022d59540 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=99703 stat=onproc flags process=10 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ac1650,0xffffffff82616060 process=0xffff800020aec728 user=0xffff800022d54000, vmspace=0xfffffd806e8b52e8 estcpu=36, cpticks=6, pctcpu=0.0 user=0, sys=6, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 32664 516124 51559 32767 7 0x10 syz-executor.0 *32664 99703 51559 32767 7 0x4000010 syz-executor.0 51559 458383 60030 32767 3 0x90 nanosleep syz-executor.0 60030 471782 2027 0 3 0x82 wait syz-executor.0 2260 5901 38318 32767 3 0x10 biowait syz-executor.1 38318 436540 2027 0 3 0x82 wait syz-executor.1 68619 196450 0 0 3 0x14200 bored sosplice 2027 390782 81521 0 3 0x82 thrsleep syz-fuzzer 2027 176353 81521 0 3 0x4000082 nanosleep syz-fuzzer 2027 277650 81521 0 3 0x4000082 thrsleep syz-fuzzer 2027 331830 81521 0 3 0x4000082 thrsleep syz-fuzzer 2027 406477 81521 0 3 0x4000082 nanosleep syz-fuzzer 2027 117283 81521 0 3 0x4000082 thrsleep syz-fuzzer 2027 146000 81521 0 3 0x4000082 thrsleep syz-fuzzer 2027 495591 81521 0 3 0x4000082 thrsleep syz-fuzzer 2027 420688 81521 0 3 0x4000082 thrsleep syz-fuzzer 2027 57060 81521 0 3 0x4000082 kqread syz-fuzzer 81521 6423 30184 0 3 0x10008a pause ksh 30184 418211 10072 0 3 0x92 select sshd 94797 391949 1 0 3 0x100083 ttyin getty 10072 46458 1 0 3 0x80 select sshd 86438 323354 40190 73 3 0x100090 kqread syslogd 40190 129488 1 0 3 0x100082 netio syslogd 83960 180459 1 77 3 0x100090 poll dhclient 69867 356760 1 0 3 0x80 poll dhclient 26837 242630 0 0 2 0x14200 zerothread 82293 154535 0 0 3 0x14200 aiodoned aiodoned 37556 222223 0 0 3 0x14200 syncer update 60006 332060 0 0 3 0x14200 cleaner cleaner 46501 260704 0 0 3 0x14200 reaper reaper 29023 91281 0 0 3 0x14200 pgdaemon pagedaemon 7852 9993 0 0 3 0x14200 bored crynlk 91607 466512 0 0 3 0x14200 bored crypto 36700 515180 0 0 3 0x40014200 acpi0 acpi0 19821 434341 0 0 3 0x40014200 idle1 3341 52785 0 0 3 0x14200 bored softnet 57652 21757 0 0 3 0x14200 bored systqmp 89375 19485 0 0 3 0x14200 bored systq 57745 129719 0 0 3 0x40014200 bored softclock 44863 226980 0 0 3 0x40014200 idle0 71250 214397 0 0 3 0x14200 bored smr 1 248764 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 32664 (syz-executor.0) thread 0xffff800020ac1160 (99703) shared rwlock vmmaplk r = 0 (0xfffffd806e8b5300) #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_all+0x56 sys/uvm/uvm_map.c:2567 #4 sys_mlockall+0x6a sys/uvm/uvm_mmap.c:826 #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 Process 2260 (syz-executor.1) thread 0xffff800020ac09f8 (5901) exclusive rrwlock inode r = 0 (0xfffffd8065eeb4e0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1352 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2974 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807e56c4d8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #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 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2959 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9477 6333K 6333K 78643K 11136 0 pcb 13 10K 12K 78643K 15 0 rtable 105 3K 3K 78643K 8042 0 ifaddr 39 13K 15K 78643K 1053 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 2K 78643K 316 0 iov 0 0K 64K 78643K 3622 0 mount 1 1K 1K 78643K 1 0 vnodes 1215 76K 76K 78643K 6932 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 198 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 115 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 7 21K 33K 78643K 12089 0 sigio 0 0K 0K 78643K 166 0 proc 48 50K 83K 78643K 7303 0 subproc 34 2K 2K 78643K 2448 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 2K 78643K 11829 0 in_multi 33 2K 2K 78643K 1873 0 ether_multi 1 0K 0K 78643K 33 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 102 450K 450K 78643K 102 0 exec 0 0K 1K 78643K 4196 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 190 28K 42K 78643K 42033 0 UVM aobj 130 4K 4K 78643K 140 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 713 0 NDP 5 0K 0K 78643K 435 0 temp 106 3034K 3124K 78643K 44606 0 kqueue 0 0K 0K 78643K 103 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 64 322 0 316 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 3768 0 3766 1 0 1 1 0 8 0 rtentry 112 1497 0 1453 2 0 2 2 0 8 0 unpcb 120 23862 0 23830 9 7 2 3 0 8 0 syncache 264 93 0 93 28 27 1 1 0 8 1 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 60 0 60 26 25 1 1 0 8 1 tcpcb 544 22278 0 22274 120 119 1 13 0 8 0 ipq 40 174 0 174 34 34 0 1 0 8 0 ipqe 40 7123 0 7123 34 34 0 1 0 8 0 inpcb 280 33505 0 33487 114 112 2 10 0 8 0 ip6q 72 13 0 13 9 9 0 1 0 8 0 ip6af 40 300 0 300 9 9 0 1 0 8 0 nd6 48 288 0 284 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 6520 0 6304 14 0 14 14 0 8 0 art_table 32 6521 0 6304 2 0 2 2 0 8 0 art_node 16 1496 0 1456 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 0 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 106 0 96 1 0 1 1 0 8 0 shmpl 112 138 0 10 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 19376 0 17958 46 0 46 46 0 8 0 ffsino 272 19376 0 17958 95 0 95 95 0 8 0 nchpl 144 38203 0 36586 61 0 61 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 173284 0 173283 7 6 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 116372 0 116371 47 45 2 7 0 8 1 plimitpl 152 4288 0 4278 1 0 1 1 0 8 0 sigapl 432 11834 0 11819 6 4 2 3 0 8 0 futexpl 56 319950 0 319950 6 5 1 1 0 8 1 knotepl 112 3312 0 3293 8 7 1 3 0 8 0 kqueuepl 104 7796 0 7794 32 31 1 4 0 8 0 pipepl 160 10792 0 10773 34 32 2 3 0 8 1 fdescpl 488 11835 0 11819 6 3 3 3 0 8 1 filepl 152 169725 0 169628 132 126 6 14 0 8 0 lockfpl 104 3114 0 3113 1 0 1 1 0 8 0 lockfspl 48 1209 0 1208 1 0 1 1 0 8 0 sessionpl 112 159 0 149 1 0 1 1 0 8 0 pgrppl 48 222 0 212 1 0 1 1 0 8 0 ucredpl 96 48271 0 48262 1 0 1 1 0 8 0 zombiepl 144 11819 0 11819 6 5 1 1 0 8 1 processpl 904 11851 0 11819 4 0 4 4 0 8 0 procpl 632 33024 0 32982 17 12 5 5 0 8 1 srpgc 64 284 0 284 43 43 0 1 0 8 0 sosppl 128 176 0 176 30 29 1 1 0 8 1 sockpl 384 61437 0 61394 154 148 6 17 0 8 0 mcl64k 65536 54 0 0 3 0 3 3 0 8 0 mcl16k 16384 48 0 0 5 2 3 3 0 8 0 mcl12k 12288 41 0 0 2 0 2 2 0 8 0 mcl9k 9216 30 0 0 2 0 2 2 0 8 0 mcl8k 8192 56 0 0 4 2 2 3 0 8 0 mcl4k 4096 25 0 0 4 1 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 717 0 0 17 5 12 15 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 1412 0 0 49 1 48 49 0 8 0 bufpl 280 32812 0 25746 508 2 506 506 0 8 0 anonpl 16 1380662 0 1366033 258 199 59 75 0 125 0 amapchunkpl 152 90695 0 90327 127 112 15 19 0 158 0 amappl16 192 63227 0 62675 409 372 37 52 0 8 8 amappl15 184 3906 0 3902 1 0 1 1 0 8 0 amappl14 176 1792 0 1787 2 1 1 1 0 8 0 amappl13 168 1135 0 1134 1 0 1 1 0 8 0 amappl12 160 1076 0 1071 3 2 1 1 0 8 0 amappl11 152 3931 0 3916 1 0 1 1 0 8 0 amappl10 144 418 0 404 1 0 1 1 0 8 0 amappl9 136 3048 0 3045 1 0 1 1 0 8 0 amappl8 128 2114 0 2005 7 3 4 4 0 8 0 amappl7 120 1330 0 1312 1 0 1 1 0 8 0 amappl6 112 3606 0 3583 1 0 1 1 0 8 0 amappl5 104 2803 0 2792 1 0 1 1 0 8 0 amappl4 96 12418 0 12382 1 0 1 1 0 8 0 amappl3 88 2107 0 2099 1 0 1 1 0 8 0 amappl2 80 87337 0 87259 4 2 2 3 0 8 0 amappl1 72 311631 0 311168 26 16 10 20 0 8 0 amappl 80 37230 0 37191 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 64 139 0 10 3 0 3 3 0 8 0 uaddrrnd 24 11835 0 11819 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11835 0 11819 1 0 1 1 0 8 0 vmmpekpl 168 107627 0 107597 3 0 3 3 0 8 0 vmmpepl 168 1532265 0 1530357 401 293 108 120 0 357 11 vmsppl 368 11834 0 11819 2 0 2 2 0 8 0 pdppl 4096 23677 0 23638 9 3 6 6 0 8 1 pvpl 32 4650354 0 4632334 631 485 146 183 0 265 0 pmappl 232 11834 0 11819 18 17 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 339 0 141 9 2 7 7 0 8 0