witness: lock order reversal: 1st 0xffff800045ffd930 fdlock (&newfdp->fd_fd.fd_lock) 2nd 0xffff800001a4c240 inode (&ip->i_lock) lock order [1] fdlock (&newfdp->fd_fd.fd_lock) -> [2] inode (&ip->i_lock) lock order data 0xffffffff84d27d60 -> 0xffffffff84ccc6e0 is missing lock order [2] inode (&ip->i_lock) -> [3] sbufrcv (&so->so_rcv.sb_lock) #0 rw_do_enter_write+0xc4 sys/kern/kern_rwlock.c:234 #1 sblock+0xbf sys/kern/uipc_socket2.c:536 #2 soreceive+0x3b1 sys/kern/uipc_socket.c:890 #3 fifo_read+0x1d9 sys/miscfs/fifofs/fifo_vnops.c:264 #4 VOP_READ+0x1a8 sys/kern/vfs_vops.c:227 #5 vn_rdwr+0x1bc sys/kern/vfs_vnops.c:-1 #6 vndsetcred+0xbf sys/dev/vnd.c:685 #7 vndioctl+0x12ef sys/dev/vnd.c:486 #8 VOP_IOCTL+0x131 sys/kern/vfs_vops.c:264 #9 vn_ioctl+0x18c sys/kern/vfs_vnops.c:537 #10 sys_ioctl+0x868 sys/kern/sys_generic.c:510 #11 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 #12 Xsyscall+0x128 lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] fdlock (&newfdp->fd_fd.fd_lock) #0 rw_do_enter_write+0xc4 sys/kern/kern_rwlock.c:234 #1 unp_externalize+0x550 sys/kern/uipc_usrreq.c:1104 #2 soreceive+0x1029 sys/kern/uipc_socket.c:1029 #3 recvit+0x5cc sys/kern/uipc_syscalls.c:1078 #4 sys_recvmsg+0x29c sys/kern/uipc_syscalls.c:878 #5 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 #6 Xsyscall+0x128 Stopped at db_enter+0x17: popq %rbp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> show kasan kasan: no report recorded this boot ddb{0}> trace db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 witness_checkorder(ffff800001a4c240,9,0) at witness_checkorder+0x19db sys/kern/subr_witness.c:-1 rw_do_enter_write(ffff800001a4c228,1) at rw_do_enter_write+0xc4 sys/kern/kern_rwlock.c:234 rrw_enter(ffff800001a4c228,1) at rrw_enter+0xf0 sys/kern/kern_rwlock.c:621 VOP_LOCK(ffff800001a4a968,2001) at VOP_LOCK+0x17e sys/kern/vfs_vops.c:527 vn_lock(ffff800001a4a968,2001) at vn_lock+0xca sys/kern/vfs_vnops.c:576 vn_closefile(ffff800001c5cad8,ffff800045ff7ca8) at vn_closefile+0x1b2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(ffff800001c5cad8,ffff800045ff7ca8) at vn_closefile+0x1b2 sys/kern/vfs_vnops.c:621 fdrop(ffff800001c5cad8,ffff800045ff7ca8) at fdrop+0x1c3 sys/kern/kern_descrip.c:1281 knote_drop(ffff800001d3e790,ffff800045ff7ca8) at knote_drop+0x23b sys/kern/kern_event.c:2359 knote_remove(ffff800045ff7ca8,ffff8000017be700,ffff8000017be790,b,0) at knote_remove+0x346 sys/kern/kern_event.c:-1 knote_fdclose(ffff800045ff7ca8,b) at knote_fdclose+0x14f sys/kern/kern_event.c:2222 fdrelease(ffff800045ff7ca8,b) at fdrelease+0x13a sys/kern/kern_descrip.c:760 sys_closefrom(ffff800045ff7ca8,ffff80003bb4c7a0,ffff80003bb4c700) at sys_closefrom+0x1bc sys/kern/kern_descrip.c:1471 syscall(ffff80003bb4c7a0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bb4c7a0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xebd61027ef0, count: -15 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003bb4c040 rbx 0xffffffff84d27da0 .str.17 rdx 0 rcx 0xffffffff852a9ff0 cpu_info_full_primary+0x1ff0 rax 0 r8 0xffff80003bb4be20 r9 0xffff80003bb4bdc0 r10 0xffff80003bb4c158 r11 0xffffffff82316470 x86_bus_space_io_read_1 r12 0xffffffff84ccc6c0 ffs_vget.__lock_type r13 0xffff800045ffd930 r14 0x3 r15 0xffffffff84ccc700 .str.13 rip 0xffffffff83ac0d27 db_enter+0x17 cs 0x8 rflags 0x246 rsp 0xffff80003bb4c040 ss 0x10 db_enter+0x17: popq %rbp ddb{0}> show proc PROC (syz-executor) tid=437410 pid=41317 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045ff6d18,0xffff800045ff7a20 process=0xffff800045ff0e90 user=0xffff80003bb41000, vmspace=0xffff800001ded5e0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 91179 51218 23170 0 7 0 0 syz-executor 91179 116956 23170 0 3 0 0x4000080 fsleep syz-executor 42678 328379 64384 0 2 0 0 syz-executor 42678 1482 64384 0 3 0 0x4000080 fsleep syz-executor 63303 189580 18805 0 2 0 0 syz-executor 63303 188868 18805 0 3 0 0x4000080 fsleep syz-executor 37282 149318 44296 0 2 0 0 syz-executor 37282 315896 44296 0 3 0 0x4000080 fsleep syz-executor 37282 299486 44296 0 3 0 0x4000080 fsleep syz-executor 42095 285314 73959 0 2 0 0 syz-executor 42095 196948 73959 0 3 0 0x4000080 fsleep syz-executor 83938 342111 57055 0 2 0 0 syz-executor 83938 428748 57055 0 3 0 0x4000080 fsleep syz-executor 41317 115459 20382 0 2 0 0 syz-executor *41317 437410 20382 0 7 0 0x4000000 syz-executor 41317 230715 20382 0 3 0 0x4000080 fsleep syz-executor 95925 224262 48169 0 2 0 0 syz-executor 95925 155986 48169 0 3 0 0x4000080 sbwait syz-executor 95925 341231 48169 0 3 0 0x4000080 fsleep syz-executor 57055 108347 7564 0 3 0x2 0x80 nanoslp syz-executor 64384 318969 7564 0 3 0x2 0x80 nanoslp syz-executor 73959 42593 7564 0 3 0x2 0x80 nanoslp syz-executor 44296 228421 7564 0 3 0x2 0x80 nanoslp syz-executor 23170 348637 7564 0 3 0x2 0x80 nanoslp syz-executor 20382 471104 7564 0 3 0x2 0x80 nanoslp syz-executor 48169 449691 7564 0 3 0x2 0x80 nanoslp syz-executor 18805 422940 7564 0 2 0x2 0 syz-executor 7564 74115 81399 0 3 0x2 0x80 kqread syz-executor 81399 257826 6818 0 3 0x100002 0x88 sigsusp ksh 6818 318644 14939 0 3 0x10 0x88 kqread sshd-session 14939 47043 54924 0 3 0x12 0x80 kqread sshd-session 1774 354653 1 0 3 0x100003 0x80 ttyin getty 54924 437320 1 0 3 0 0x88 kqread sshd 83594 389658 25802 74 3 0x1100012 0x80 bpf pflogd 25802 155889 1 0 3 0 0x80 sbwait pflogd 90664 323938 51705 73 3 0x1100010 0x80 kqread syslogd 51705 54145 1 0 3 0x100002 0x80 sbwait syslogd 69949 455002 1 0 3 0x100000 0x80 kqread resolvd 39243 54169 13637 77 3 0x100012 0x80 kqread dhcpleased 14578 251803 13637 77 3 0x100012 0x80 kqread dhcpleased 13637 294997 1 0 3 0 0x80 kqread dhcpleased 64865 226571 0 0 3 0x14000 0x200 bored smr 81511 483167 0 0 2 0x14000 0x200 zerothread 99932 334998 0 0 3 0x14000 0x200 aiodoned aiodoned 15331 237627 0 0 3 0x14000 0x200 syncer update 34374 159685 0 0 3 0x14000 0x200 cleaner cleaner 22975 427391 0 0 3 0x14000 0x200 reaper reaper 2823 157797 0 0 3 0x14000 0x200 pgdaemon pagedaemon 55527 484106 0 0 3 0x14000 0x200 bored viomb 94192 387771 0 0 3 0x14000 0x40000200 acpi0 acpi0 6158 11789 0 0 3 0x14000 0x40000200 idle1 98636 149912 0 0 3 0x14000 0x200 bored softnet1 56852 140273 0 0 3 0x14000 0x200 bored softnet0 6419 302733 0 0 3 0x14000 0x200 bored systqmp 59283 39462 0 0 3 0x14000 0x200 bored systq 5047 86356 0 0 3 0x14000 0x200 tmoslp softclockmp 1730 30392 0 0 3 0x14000 0x40000200 tmoslp softclock 96900 73848 0 0 3 0x14000 0x40000200 idle0 1 323142 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 91179 (syz-executor) thread 0xffff800029932548 (51218) exclusive rwlock uobjlk r = 0 (0xffff800001bd9bc8) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x53e sys/kern/kern_rwlock.c:320 #2 uvm_fault+0x333 sys/uvm/uvm_fault.c:649 #3 upageflttrap+0xe0 sys/arch/amd64/amd64/trap.c:194 #4 usertrap+0x4f9 sys/arch/amd64/amd64/trap.c:648 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xffff800001dedc98) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x55d sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x1a2 sys/uvm/uvm_fault.c:-1 #3 uvm_fault_check+0x43 sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x1e7 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xe0 sys/arch/amd64/amd64/trap.c:194 #6 usertrap+0x4f9 sys/arch/amd64/amd64/trap.c:648 #7 recall_trap+0x8 Process 41317 (syz-executor) thread 0xffff800045ff7ca8 (437410) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff85450640) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 vn_closefile+0x90 sys/kern/vfs_vnops.c:614 #2 fdrop+0x1c3 sys/kern/kern_descrip.c:1281 #3 knote_drop+0x23b sys/kern/kern_event.c:2359 #4 knote_remove+0x346 sys/kern/kern_event.c:-1 #5 knote_fdclose+0x14f sys/kern/kern_event.c:2222 #6 fdrelease+0x13a sys/kern/kern_descrip.c:760 #7 sys_closefrom+0x1bc sys/kern/kern_descrip.c:1471 #8 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 #9 Xsyscall+0x128 exclusive rwlock fdlock r = 0 (0xffff800045ffd930) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x53e sys/kern/kern_rwlock.c:320 #2 sys_closefrom+0x27d sys/kern/kern_descrip.c:1468 #3 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 #4 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11069 12252K 12711K 166960K 12595 0 pcb 18 24K 24K 166960K 43 0 rtable 212 12K 14K 166960K 430 0 pf 37 23K 29K 166960K 89 0 ifaddr 39 10K 12K 166960K 55 0 ifgroup 59 2K 2K 166960K 72 0 sysctl 4 1K 13K 166960K 12 0 counters 72 43K 44K 166960K 78 0 ioctlops 0 0K 4K 166960K 1547 0 iov 0 0K 1K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1310 84K 85K 166960K 1630 0 UFS quota 1 36K 36K 166960K 1 0 UFS mount 5 44K 44K 166960K 5 0 shm 2 2K 6K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 25 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 292K 166960K 11964 0 file desc 18 65K 93K 166960K 545 0 sigio 0 0K 0K 166960K 5 0 proc 73 128K 193K 166960K 594 0 subproc 72 9K 9K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 20K 20K 166960K 1 0 ip_moptions 0 0K 0K 166960K 24 0 in_multi 78 5K 7K 166960K 120 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 15 0 ISOFS mount 1 36K 36K 166960K 1 0 MSDOSFS mount 1 20K 20K 166960K 1 0 ttys 61 425K 425K 166960K 61 0 exec 0 0K 2K 166960K 413 0 fusefs mount 1 36K 36K 166960K 1 0 tdb 3 1K 1K 166960K 3 0 VM swap 14 124K 124K 166960K 15 0 UVM amap 239 245K 272K 166960K 6333 0 UVM aobj 11 8K 8K 166960K 12 0 pinsyscall 1067 1896K 1896K 166960K 1760 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1 0 NDP 13 0K 2K 166960K 34 0 temp 36 9170K 9183K 166960K 5136 0 kqueue 14 44K 52K 166960K 63 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 28 0 0 1 0 1 1 0 8 0 rtpcb 120 38 0 35 1 0 1 1 0 8 0 rtentry 176 129 0 35 6 0 6 6 0 8 0 unpcb 144 206 0 188 2 1 1 2 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 26 0 22 1 0 1 1 0 8 0 arp 136 22 0 6 1 0 1 1 0 8 0 inpcb 328 202 0 188 2 0 2 2 0 8 0 nd6 152 30 0 10 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 pffrag 232 2 0 2 2 1 1 1 0 482 1 pffrnode 88 2 0 2 2 1 1 1 0 8 1 pffrent 40 5 0 5 2 1 1 1 0 8 1 pfosfp 40 1429 0 1429 5 1 4 5 0 8 4 pfosfpen 112 1429 0 1429 21 1 20 21 0 8 20 pfrktable 1344 7 0 7 1 1 0 1 0 8 0 pfanchor 1288 3 0 2 1 0 1 1 0 8 0 pftag 88 5 0 2 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 55 0 10 1 0 1 1 0 8 0 pfstkey 128 55 0 10 2 0 2 2 0 8 0 pfstate 448 55 0 10 6 0 6 6 0 8 0 pfrule 1360 38 0 32 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 508 0 134 30 3 27 29 0 8 1 art_table 40 510 0 134 5 0 5 5 0 8 0 art_node 32 129 0 43 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 72 22 0 12 1 0 1 1 0 8 0 shmpl 112 9 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2111 0 638 93 0 93 93 0 8 0 ffsino 296 2111 0 638 114 0 114 114 0 8 0 nchpl 144 2760 0 1057 64 0 64 64 0 8 0 vnodes 216 2400 0 0 134 0 134 134 0 8 0 namei 1024 8180 0 8180 1 0 1 1 0 8 1 percpumem 16 55 0 3 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 2 1 1 0 1 0 8 0 kstatmem 264 37 0 6 3 0 3 3 0 8 0 scxspl 216 9788 0 9788 12 8 4 8 1 8 4 plimitpl 152 52 0 35 1 0 1 1 0 8 0 sigapl 424 870 0 822 7 1 6 7 0 8 0 knotepl 120 82 0 0 3 0 3 3 0 8 0 kqueuepl 224 105 0 93 1 0 1 1 0 8 0 pipepl 344 160 0 133 3 0 3 3 0 8 0 fdescpl 528 854 0 822 3 0 3 3 0 8 0 filepl 160 2981 0 2754 10 0 10 10 0 8 0 lockfpl 104 128 0 125 1 0 1 1 0 8 0 lockfspl 48 65 0 62 1 0 1 1 0 8 0 sessionpl 144 41 0 31 1 0 1 1 0 8 0 pgrppl 48 51 0 33 1 0 1 1 0 8 0 ucredpl 104 339 0 325 1 0 1 1 0 8 0 zombiepl 144 822 0 822 1 0 1 1 0 8 1 processpl 1232 870 0 822 5 0 5 5 0 8 0 procpl 664 1336 0 1277 6 0 6 6 0 8 0 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 752 449 0 414 6 1 5 5 0 8 1 mcl64k 65536 20 0 0 3 0 3 3 0 8 0 mcl16k 16384 15 0 0 2 0 2 2 0 8 0 mcl12k 12288 14 0 0 2 0 2 2 0 8 0 mcl9k128 9344 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 11 0 0 2 0 2 2 0 8 0 mextrefs 64 20 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 168 0 0 11 0 11 11 0 8 0 bufpl 272 2859 0 106 184 0 184 184 0 8 0 anonpl 32 3873 0 0 32 0 32 32 0 222 0 amapchunkpl 152 19220 0 18705 21 1 20 21 0 158 0 amappl16 200 2374 0 2345 6 2 4 5 0 8 0 amappl15 192 4 0 4 2 2 0 1 0 8 0 amappl14 184 457 0 455 1 0 1 1 0 8 0 amappl13 176 265 0 252 1 0 1 1 0 8 0 amappl12 168 1118 0 1087 2 0 2 2 0 8 0 amappl11 160 98 0 98 1 1 0 1 0 8 0 amappl10 152 65 0 51 1 0 1 1 0 8 0 amappl9 144 274 0 274 1 1 0 1 0 8 0 amappl8 136 105 0 103 1 0 1 1 0 8 0 amappl7 128 154 0 141 1 0 1 1 0 8 0 amappl6 120 168 0 166 1 0 1 1 0 8 0 amappl5 112 105 0 95 1 0 1 1 0 8 0 amappl4 104 302 0 282 1 0 1 1 0 8 0 amappl3 96 3574 0 3470 3 0 3 3 0 8 0 amappl2 88 991 0 914 2 0 2 2 0 8 0 amappl1 80 12300 0 11697 15 2 13 15 0 8 0 amappl 88 5554 0 5385 5 1 4 4 0 92 0 uvmvnodes 80 101 0 0 3 0 3 3 0 8 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 11 0 1 1 0 1 1 0 8 0 uaddrrnd 24 854 0 822 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 854 0 822 1 0 1 1 0 8 0 vmmpekpl 168 8259 0 8227 2 0 2 2 0 8 0 vmmpepl 168 60916 0 58958 87 0 87 87 0 357 1 vmsppl 488 853 0 822 6 1 5 5 0 8 0 rwobjpl 80 18977 0 17933 25 2 23 23 0 8 1 pdppl 4096 1716 0 1644 104 30 74 86 0 8 2 pvpl 32 11679 0 0 94 0 94 94 0 265 0 pmappl 256 853 0 822 3 0 3 3 0 8 0 extentpl 40 47 0 29 1 0 1 1 0 8 0 phpool 120 469 0 37 14 0 14 14 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 witness_checkorder(ffff800001a4c240,9,0) at witness_checkorder+0x19db sys/kern/subr_witness.c:-1 rw_do_enter_write(ffff800001a4c228,1) at rw_do_enter_write+0xc4 sys/kern/kern_rwlock.c:234 rrw_enter(ffff800001a4c228,1) at rrw_enter+0xf0 sys/kern/kern_rwlock.c:621 VOP_LOCK(ffff800001a4a968,2001) at VOP_LOCK+0x17e sys/kern/vfs_vops.c:527 vn_lock(ffff800001a4a968,2001) at vn_lock+0xca sys/kern/vfs_vnops.c:576 vn_closefile(ffff800001c5cad8,ffff800045ff7ca8) at vn_closefile+0x1b2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(ffff800001c5cad8,ffff800045ff7ca8) at vn_closefile+0x1b2 sys/kern/vfs_vnops.c:621 fdrop(ffff800001c5cad8,ffff800045ff7ca8) at fdrop+0x1c3 sys/kern/kern_descrip.c:1281 knote_drop(ffff800001d3e790,ffff800045ff7ca8) at knote_drop+0x23b sys/kern/kern_event.c:2359 knote_remove(ffff800045ff7ca8,ffff8000017be700,ffff8000017be790,b,0) at knote_remove+0x346 sys/kern/kern_event.c:-1 knote_fdclose(ffff800045ff7ca8,b) at knote_fdclose+0x14f sys/kern/kern_event.c:2222 fdrelease(ffff800045ff7ca8,b) at fdrelease+0x13a sys/kern/kern_descrip.c:760 sys_closefrom(ffff800045ff7ca8,ffff80003bb4c7a0,ffff80003bb4c700) at sys_closefrom+0x1bc sys/kern/kern_descrip.c:1471 syscall(ffff80003bb4c7a0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bb4c7a0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xebd61027ef0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x19: leave ddb{1}> trace x86_ipi_db(ffff800028fe3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412 x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __asan_load4_noabort(ffffffff8544fe40) at __asan_load4_noabort uvm_fault(ffff800001dedb98,821aaa0c000,0,1) at uvm_fault+0x338 sys/uvm/uvm_fault.c:650 upageflttrap(ffff800034ae0aa0,821aaa0c000) at upageflttrap+0xe0 sys/arch/amd64/amd64/trap.c:194 usertrap(ffff800034ae0aa0) at usertrap+0x4f9 sys/arch/amd64/amd64/trap.c:648 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7a5e5ca4de60, count: -8