kernel: protection fault trap, code=0 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace witness_checkorder(fffffd807e839a30,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd807e839a20) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021224000,fffffd807e839a20,fffffd807e839aa8,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021224000,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021224000) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021224000,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021224000,ffff80002afcf150,ffff80002afcf1a0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002afcf220) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002afcf220) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74664ed7a310, count: -9 ddb{1}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff80002afceef0 rbx 0xe rdx 0 rcx 0xffff800021224000 rax 0xffff800020d58ff0 r8 0x1 r9 0x1 r10 0x1ee841cd18e9f03c r11 0x6833efc1d6f0539e r12 0 r13 0xfffffd807e839a30 r14 0x3ff5555555555555 r15 0xffff800021224000 rip 0xffffffff8146926c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002afcee40 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{1}> show proc PROC (syz-executor.5) pid=230110 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000211f5d50,0xffff800021225d48 process=0xffff80002836c018 user=0xffff80002afca000, vmspace=0xfffffd8069da1930 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 86027 116648 51519 32767 2 0x10 syz-executor.1 40204 111746 69072 32767 2 0x10 syz-executor.6 40204 428271 69072 32767 2 0x4000010 syz-executor.6 51989 384267 52520 32767 2 0x10 syz-executor.3 51989 418960 52520 32767 3 0x4000090 kqread syz-executor.3 14056 461593 37018 32767 2 0x10 syz-executor.0 14056 400872 37018 32767 3 0x4000090 netio syz-executor.0 14056 417199 37018 32767 2 0x4000010 syz-executor.0 89016 101686 99008 32767 3 0x90 nanoslp syz-executor.7 89016 333911 99008 32767 3 0x4000090 fsleep syz-executor.7 69072 347062 3190 32767 3 0x90 nanoslp syz-executor.6 3190 442658 11577 0 3 0x82 wait syz-executor.6 82302 439668 86817 32767 3 0x90 nanoslp syz-executor.4 86817 124227 11577 0 3 0x82 wait syz-executor.4 37018 268256 51585 32767 3 0x90 nanoslp syz-executor.0 51585 480851 11577 0 3 0x82 wait syz-executor.0 99008 331424 17791 32767 3 0x90 nanoslp syz-executor.7 17791 194232 11577 0 3 0x82 wait syz-executor.7 94049 463754 0 0 3 0x14200 bored sosplice 73436 74889 13531 0 3 0x100082 netio arp 13531 388593 49797 0 3 0x10008a sigsusp sh 45170 395805 35633 32767 3 0x90 nanoslp syz-executor.5 35633 386591 11577 0 3 0x82 wait syz-executor.5 49797 316337 1 0 3 0x80 wait syz-executor.4 52520 473863 91652 32767 3 0x90 nanoslp syz-executor.3 18689 4844 53173 32767 3 0x10 biowait syz-executor.2 51519 389394 65311 32767 3 0x90 nanoslp syz-executor.1 91652 285215 11577 0 3 0x82 wait syz-executor.3 53173 223524 11577 0 3 0x82 wait syz-executor.2 65311 124006 11577 0 3 0x82 wait syz-executor.1 11577 17264 57705 0 3 0x2000082 wait syz-fuzzer 11577 402016 57705 0 3 0x6000082 nanoslp syz-fuzzer 11577 433097 57705 0 3 0x6000082 wait syz-fuzzer 11577 430712 57705 0 3 0x6000082 wait syz-fuzzer 11577 78409 57705 0 3 0x6000082 wait syz-fuzzer 11577 75798 57705 0 3 0x6000082 wait syz-fuzzer 11577 149124 57705 0 3 0x6000082 thrsleep syz-fuzzer 11577 71277 57705 0 3 0x6000082 wait syz-fuzzer 11577 569 57705 0 3 0x6000082 thrsleep syz-fuzzer 11577 261198 57705 0 3 0x6000082 thrsleep syz-fuzzer 11577 277391 57705 0 3 0x6000082 thrsleep syz-fuzzer 11577 248103 57705 0 3 0x6000082 kqread syz-fuzzer 11577 300844 57705 0 3 0x6000082 wait syz-fuzzer 11577 342953 57705 0 3 0x6000082 wait syz-fuzzer 11577 51983 57705 0 3 0x6000082 thrsleep syz-fuzzer 11577 186083 57705 0 3 0x6000082 thrsleep syz-fuzzer 57705 284284 3361 0 3 0x10008a sigsusp ksh 3361 430383 84665 0 7 0x12 sshd 22585 410331 1 0 3 0x100083 ttyin getty 84665 4450 1 0 3 0x88 kqread sshd 71188 62632 24411 73 3 0x1100090 kqread syslogd 24411 157876 1 0 3 0x100082 netio syslogd 39845 335103 1 0 3 0x100080 kqread resolvd 88166 273662 67680 77 3 0x100092 kqread dhcpleased 44088 433268 67680 77 3 0x100092 kqread dhcpleased 67680 13863 1 0 3 0x80 kqread dhcpleased 27078 425564 0 0 3 0x14200 bored smr 83468 162934 0 0 2 0x14200 zerothread 44539 299540 0 0 3 0x14200 aiodoned aiodoned 14092 25533 0 0 3 0x14200 syncer update 15261 258535 0 0 3 0x14200 cleaner cleaner 65225 114261 0 0 2 0x14200 reaper 7810 120297 0 0 3 0x14200 pgdaemon pagedaemon 40008 190742 0 0 3 0x14200 bored viomb 94156 439563 0 0 3 0x40014200 acpi0 acpi0 28385 486580 0 0 3 0x40014200 idle1 93605 413707 0 0 3 0x14200 bored softnet3 95187 304421 0 0 3 0x14200 bored softnet2 82168 77636 0 0 3 0x14200 bored softnet1 19064 272957 0 0 3 0x14200 bored softnet0 73735 176654 0 0 3 0x14200 bored systqmp 93543 130838 0 0 3 0x14200 bored systq 49957 50717 0 0 3 0x40014200 bored softclock 129 429271 0 0 3 0x40014200 idle0 1 34570 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 40204 (syz-executor.6) thread 0xffff8000212a62b0 (428271) exclusive rrwlock inode r = 0 (0xfffffd80673cdb48) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80673cdc58) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 Process 18689 (syz-executor.2) thread 0xffff80002121aac0 (4844) exclusive rrwlock inode r = 0 (0xfffffd80673cd2c8) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x200 sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1314 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 #11 namei+0x55a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8067ff7f80) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10191 6409K 6420K 78643K 11290 0 pcb 13 10K 12K 78643K 15 0 rtable 236 6K 7K 78643K 742 0 pf 29 8K 8K 78643K 43 0 ifaddr 44 15K 15K 78643K 74 0 ifgroup 50 2K 2K 78643K 78 0 counters 60 35K 35K 78643K 74 0 ioctlops 0 0K 2K 78643K 35 0 iov 0 0K 20K 78643K 277 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1291 81K 81K 78643K 1582 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 25 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 13 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 27 101K 109K 78643K 3158 0 sigio 0 0K 0K 78643K 49 0 proc 56 78K 115K 78643K 776 0 subproc 117 7K 7K 78643K 195 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 333 0 in_multi 99 7K 7K 78643K 222 0 ether_multi 1 0K 0K 78643K 9 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 85 387K 387K 78643K 85 0 exec 0 0K 1K 78643K 580 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 358 92K 99K 78643K 30204 0 UVM aobj 52 2K 2K 78643K 52 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 131 0 NDP 11 0K 1K 78643K 46 0 temp 78 5920K 6039K 78643K 12106 0 kqueue 12 18K 34K 78643K 428 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 plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 99 0 95 1 0 1 1 0 8 0 rtentry 112 187 0 76 4 0 4 4 0 8 0 unpcb 144 1223 0 1208 6 5 1 6 0 8 0 syncache 304 90 0 90 8 7 1 1 0 8 1 tcpqe 32 200 0 200 9 8 1 1 0 8 1 tcpcb 808 1506 0 1460 31 19 12 14 0 8 6 arp 120 31 0 13 1 0 1 1 0 8 0 ipq 40 3 0 1 1 0 1 1 0 8 0 ipqe 40 8 0 6 1 0 1 1 0 8 0 inpcb 368 2826 0 2777 34 23 11 14 0 8 5 nd6 136 49 0 24 1 0 1 1 0 8 0 kcovpl 48 15 0 6 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 749 0 292 30 1 29 30 0 8 0 art_table 32 750 0 292 4 0 4 4 0 8 0 art_node 16 186 0 85 1 0 1 1 0 8 0 sysvmsgpl 40 30 0 1 1 0 1 1 0 8 0 semupl 112 9 0 9 1 1 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 49 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 5106 0 3665 91 0 91 91 0 8 0 ffsino 272 5106 0 3665 97 0 97 97 0 8 0 nchpl 144 9044 0 7402 63 0 63 63 0 8 0 uvmvnodes 80 5310 0 0 109 0 109 109 0 8 0 vnodes 216 5310 0 0 295 0 295 295 0 8 0 namei 1024 25466 0 25465 4 3 1 2 0 8 0 percpumem 16 50 0 7 1 0 1 1 0 8 0 kstatmem 264 36 0 14 2 0 2 2 0 8 0 scxspl 216 26469 0 26468 12 11 1 8 1 8 0 plimitpl 152 414 0 389 8 6 2 2 0 8 0 sigapl 424 3436 0 3379 7 0 7 7 0 8 0 futexpl 64 18272 0 18271 3 2 1 1 0 8 0 knotepl 120 568 0 0 17 0 17 17 0 8 0 kqueuepl 216 663 0 653 9 8 1 5 0 8 0 pipepl 320 565 0 533 9 6 3 9 0 8 0 fdescpl 496 3418 0 3380 9 3 6 6 0 8 0 filepl 152 14021 0 13762 31 18 13 18 0 8 2 lockfpl 104 360 0 358 1 0 1 1 0 8 0 lockfspl 48 142 0 140 1 0 1 1 0 8 0 sessionpl 144 30 0 13 1 0 1 1 0 8 0 pgrppl 48 67 0 50 1 0 1 1 0 8 0 ucredpl 104 1968 0 1950 1 0 1 1 0 8 0 zombiepl 144 3381 0 3379 2 1 1 1 0 8 0 processpl 1072 3436 0 3379 4 0 4 4 0 8 0 procpl 680 7382 0 7304 13 5 8 8 0 8 1 sosppl 168 98 0 96 1 0 1 1 0 8 0 sockpl 488 4245 0 4177 58 40 18 25 0 8 7 mcl64k 65536 17 0 0 3 1 2 3 0 8 0 mcl16k 16384 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 9 0 0 1 0 1 1 0 8 0 mcl9k 9216 11 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 28 0 0 4 0 4 4 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 314 0 0 32 3 29 32 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 1983 0 0 112 0 112 112 0 8 0 bufpl 288 7503 0 1172 453 0 453 453 0 8 0 anonpl 24 467695 0 459905 161 82 79 93 0 186 17 amapchunkpl 152 95564 0 94738 55 18 37 40 0 158 4 amappl16 200 12272 0 12127 92 71 21 32 0 8 13 amappl15 192 17 0 16 1 0 1 1 0 8 0 amappl14 184 183 0 166 2 1 1 2 0 8 0 amappl13 176 50 0 49 1 0 1 1 0 8 0 amappl12 168 4142 0 4102 2 0 2 2 0 8 0 amappl11 160 56 0 46 1 0 1 1 0 8 0 amappl10 152 40 0 28 2 1 1 1 0 8 0 amappl9 144 200 0 198 1 0 1 1 0 8 0 amappl8 136 279 0 200 3 0 3 3 0 8 0 amappl7 128 57 0 44 2 0 2 2 0 8 0 amappl6 120 258 0 239 2 1 1 2 0 8 0 amappl5 112 250 0 241 1 0 1 1 0 8 0 amappl4 104 613 0 573 2 0 2 2 0 8 0 amappl3 96 19371 0 19268 10 6 4 4 0 8 1 amappl2 88 3780 0 3701 3 1 2 3 0 8 0 amappl1 80 20215 0 19656 23 10 13 22 0 8 0 amappl 88 29554 0 29315 7 0 7 7 0 92 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 72 51 0 0 1 0 1 1 0 8 0 uaddrrnd 24 3418 0 3380 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3418 0 3380 1 0 1 1 0 8 0 vmmpekpl 168 27304 0 27237 4 0 4 4 0 8 0 vmmpepl 168 212251 0 209937 177 60 117 118 0 357 13 vmsppl 464 3417 0 3380 6 1 5 5 0 8 0 rwobjpl 56 61943 0 55355 107 11 96 97 0 8 0 pdppl 4096 6844 0 6760 228 140 88 88 0 8 4 pvpl 32 1298623 0 1284442 402 242 160 357 0 265 29 pmappl 248 3417 0 3380 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1144 0 197 28 0 28 28 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82c1fff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82c97058) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c97058) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800021201350,ffff80000027b500) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f end of kernel end trace frame: 0x788656b40490, count: -6 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{1}> trace witness_checkorder(fffffd807e839a30,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd807e839a20) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800021224000,fffffd807e839a20,fffffd807e839aa8,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800021224000,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800021224000) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800021224000,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800021224000,ffff80002afcf150,ffff80002afcf1a0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002afcf220) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002afcf220) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74664ed7a310, count: -9