login: witness: lock order reversal: 1st 0xfffffd807b0702c8 inode (&ip->i_lock) 2nd 0xfffffd8079d9f808 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{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(fffffd8079d9f808,9,0) at witness_checkorder+0xffc witness_debugger sys/kern/subr_witness.c:2506 [inline] witness_checkorder(fffffd8079d9f808,9,0) at witness_checkorder+0xffc sys/kern/subr_witness.c:1086 rw_enter_write(fffffd8079d9f7f8) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:125 diskmapioctl(5a00,c0106477,ffff800023bab2c0,1,ffff800020a88290) at diskmapioctl+0x237 sys/dev/diskmap.c:106 VOP_IOCTL(fffffd806fa7d198,c0106477,ffff800023bab2c0,1,fffffd807f7c6a20,ffff800020a88290) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290 vn_ioctl(fffffd8065d29c78,c0106477,ffff800023bab2c0,ffff800020a88290) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 sys_ioctl(ffff800020a88290,ffff800023bab3d8,ffff800023bab440) at sys_ioctl+0x5b8 syscall(ffff800023bab4b0) at syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023bab4b0) at syscall+0x552 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff1b,0,3,a7b0d305010) at Xsyscall+0x128 end of kernel end trace frame: 0xa7d174efee0, count: -9 ddb{1}> show registers rdi 0x3 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff800023baae80 rbx 0x3 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff800020b74000 rax 0xffff800000a46100 r8 0xffffffff81627a95 witness_checkorder+0xfd5 r9 0x5 r10 0x3 r11 0x6b97246e344a0de8 r12 0xfffffd80029b9c00 r13 0 r14 0xffffffff825d9bd0 w_lodata+0x4d0b0 r15 0xffffffff825e0df0 w_lodata+0x542d0 rip 0xffffffff81be9be8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023baae70 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=316522 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=52, nice=20 forw=0xffffffffffffffff, list=0xffff800020a88c70,0xffff800020a88028 process=0xffff800020a8b510 user=0xffff800023ba6000, vmspace=0xfffffd806e7a92e8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 64915 82212 63066 0 2 0 syz-executor.1 64915 398557 63066 0 7 0x4000080 syz-executor.1 64915 56100 63066 0 3 0x4000080 fsleep syz-executor.1 89571 297712 56118 0 2 0 syz-executor.0 *89571 316522 56118 0 7 0x4000000 syz-executor.0 89571 237885 56118 0 2 0x4000000 syz-executor.0 89571 24060 56118 0 3 0x4000080 fsleep syz-executor.0 63066 244089 26245 0 3 0x82 nanosleep syz-executor.1 56118 191075 26245 0 3 0x82 nanosleep syz-executor.0 26245 113639 72986 0 3 0x82 thrsleep syz-fuzzer 26245 164304 72986 0 3 0x4000082 thrsleep syz-fuzzer 26245 344606 72986 0 3 0x4000082 thrsleep syz-fuzzer 26245 516003 72986 0 3 0x4000082 thrsleep syz-fuzzer 26245 280719 72986 0 3 0x4000082 thrsleep syz-fuzzer 26245 504881 72986 0 3 0x4000082 thrsleep syz-fuzzer 26245 495803 72986 0 3 0x4000082 thrsleep syz-fuzzer 26245 286410 72986 0 3 0x4000082 thrsleep syz-fuzzer 26245 185108 72986 0 3 0x4000082 kqread syz-fuzzer 26245 85487 72986 0 3 0x4000082 thrsleep syz-fuzzer 72986 412041 96625 0 3 0x10008a pause ksh 96625 377568 3232 0 3 0x92 select sshd 53809 183084 1 0 3 0x100083 ttyin getty 3232 245863 1 0 3 0x80 select sshd 43117 71811 18762 74 3 0x100092 bpf pflogd 18762 212950 1 0 3 0x80 netio pflogd 65667 306126 95465 73 3 0x100090 kqread syslogd 95465 422975 1 0 3 0x100082 netio syslogd 88248 477994 1 77 3 0x100090 poll dhclient 42767 88326 1 0 3 0x80 poll dhclient 83487 235638 0 0 2 0x14200 zerothread 60538 229302 0 0 3 0x14200 aiodoned aiodoned 55797 243960 0 0 3 0x14200 syncer update 76319 380203 0 0 3 0x14200 cleaner cleaner 14040 198570 0 0 3 0x14200 reaper reaper 59711 123240 0 0 3 0x14200 pgdaemon pagedaemon 19935 391181 0 0 3 0x14200 bored crynlk 89921 96132 0 0 3 0x14200 bored crypto 95537 445905 0 0 3 0x40014200 acpi0 acpi0 58490 357920 0 0 3 0x40014200 idle1 24402 447567 0 0 3 0x14200 bored softnet 22222 93016 0 0 3 0x14200 bored systqmp 27630 27 0 0 3 0x14200 bored systq 49812 145594 0 0 3 0x40014200 bored softclock 50435 141791 0 0 3 0x40014200 idle0 9510 477373 0 0 3 0x14200 bored smr 1 177563 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 89571 (syz-executor.0) thread 0xffff800020a88290 (316522) exclusive rrwlock inode r = 0 (0xfffffd807b0702c8) #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 (0xffffffff82643958) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9476 6392K 6907K 78643K 10717 0 0 pcb 13 8K 8K 78643K 25 0 0 rtable 108 4K 4K 78643K 236 0 0 ifaddr 43 11K 11K 78643K 62 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1471 0 0 iov 0 0K 12K 78643K 8 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1215 76K 76K 78643K 1269 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 8 0K 0K 78643K 12 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 80 0 0 proc 53 50K 83K 78643K 415 0 0 subproc 32 2K 2K 78643K 34 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 4 0 0 in_multi 33 2K 2K 78643K 35 0 0 ether_multi 1 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 42 185K 185K 78643K 42 0 0 exec 0 0K 1K 78643K 212 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 104 21K 22K 78643K 1167 0 0 UVM aobj 2 2K 2K 78643K 2 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 6 0 0 NDP 7 0K 0K 78643K 16 0 0 temp 97 3541K 3605K 78643K 3474 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 0 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 45 0 1 2 0 2 2 0 8 0 unpcb 120 38 0 28 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 7389 0 7389 1 0 1 1 0 8 1 tcpcb 544 18 0 14 1 0 1 1 0 8 0 inpcb 280 69 0 62 1 0 1 1 0 8 0 nd6 48 6 0 0 1 0 1 1 0 8 0 ppxss 1128 4 0 4 1 0 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 11 0 2 1 0 1 1 0 8 0 pfstkey 112 11 0 2 1 0 1 1 0 8 0 pfstate 328 11 0 2 1 0 1 1 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 256 188 0 0 12 0 12 12 0 8 0 art_table 32 189 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1537 0 108 47 0 47 47 0 8 0 ffsino 272 1537 0 108 96 0 96 96 0 8 0 nchpl 144 1838 0 191 62 0 62 62 0 8 0 uvmvnodes 72 1609 0 0 30 0 30 30 0 8 0 vnodes 200 1609 0 0 85 0 85 85 0 8 0 namei 1024 4969 0 4969 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 4708 0 4708 8 7 1 7 0 8 1 plimitpl 152 17 0 9 1 0 1 1 0 8 0 sigapl 432 280 0 264 3 0 3 3 0 8 1 futexpl 56 654 0 652 1 0 1 1 0 8 0 knotepl 112 57 0 38 1 0 1 1 0 8 0 kqueuepl 104 8 0 6 1 0 1 1 0 8 0 pipepl 112 170 0 151 1 0 1 1 0 8 0 fdescpl 488 281 0 264 3 0 3 3 0 8 0 filepl 152 1396 0 1292 7 2 5 5 0 8 0 lockfpl 104 24 0 24 2 1 1 1 0 8 1 lockfspl 48 9 0 9 2 1 1 1 0 8 1 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 104 0 95 1 0 1 1 0 8 0 zombiepl 144 264 0 264 2 1 1 1 0 8 1 processpl 896 296 0 264 4 0 4 4 0 8 0 procpl 632 407 0 361 4 0 4 4 0 8 0 sockpl 384 128 0 109 5 2 3 3 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 118 0 0 14 0 14 14 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 160 0 0 9 0 9 9 0 8 0 bufpl 256 5790 0 1166 289 0 289 289 0 8 0 anonpl 16 37774 0 26207 50 1 49 49 0 124 1 amapchunkpl 152 1275 0 1156 8 1 7 7 0 158 1 amappl16 192 972 0 339 34 0 34 34 0 8 1 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 54 0 48 1 0 1 1 0 8 0 amappl13 168 28 0 26 2 1 1 1 0 8 0 amappl12 160 10 0 10 1 1 0 1 0 8 0 amappl11 152 89 0 71 1 0 1 1 0 8 0 amappl10 144 75 0 70 1 0 1 1 0 8 0 amappl9 136 594 0 591 1 0 1 1 0 8 0 amappl8 128 150 0 129 1 0 1 1 0 8 0 amappl7 120 37 0 32 1 0 1 1 0 8 0 amappl6 112 80 0 72 1 0 1 1 0 8 0 amappl5 104 143 0 129 1 0 1 1 0 8 0 amappl4 96 538 0 506 2 1 1 2 0 8 0 amappl3 88 178 0 166 1 0 1 1 0 8 0 amappl2 80 1303 0 1220 3 1 2 3 0 8 0 amappl1 72 15948 0 15497 25 15 10 20 0 8 0 amappl 80 659 0 615 1 0 1 1 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 281 0 264 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 281 0 264 1 0 1 1 0 8 0 vmmpekpl 168 6278 0 6246 2 0 2 2 0 8 0 vmmpepl 168 40743 0 38871 122 20 102 102 0 357 20 vmsppl 368 280 0 264 2 0 2 2 0 8 0 pdppl 4096 569 0 528 6 0 6 6 0 8 0 pvpl 32 133917 0 119111 141 14 127 127 0 265 7 pmappl 232 280 0 264 2 0 2 2 0 8 1 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 442 0 4 13 0 13 13 0 8 0