login: panic: pWoAolRN_IcaNGc:h eS_PiLt eNmO_Tm aLgOiWcE_RcEhDe cOkN: mSYbSuCfApLlL c1pu37 fr-3e4e0 8l0i sEt XImTod 0i f9 i edStopped at savectx+0xb1: movl $0,%gs:0x530 TID PID UID PRFLAGS PFLAGS CPU COMMAND *349012 65528 0 0x2 0 0 syz-executor.1 128328 35620 0 0x12 0 1 sshd savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7fffff7ad0, count: 14 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd80695f2400+16 0x0!=0xff2ba208f8b18d28 ddb{0}> trace savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7fffff7ad0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800020efb950 rbx 0 rdx 0x8b rcx 0x2 rax 0x38 r8 0xffffffff817e707f kprintf+0x16f r9 0x1 r10 0x2 r11 0x5375b48e5627a94a r12 0 r13 0 r14 0xffff800020ddd868 r15 0 rip 0xffffffff820843f1 savectx+0xb1 cs 0x8 rflags 0x46 rsp 0xffff800020efb8d0 ss 0x10 savectx+0xb1: movl $0,%gs:0x530 ddb{0}> show proc PROC (syz-executor.1) pid=349012 stat=onproc flags process=2 proc=0 pri=17, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020dddad8,0xffff800020e293a8 process=0xffff800020df1720 user=0xffff800020ef6000, vmspace=0xfffffd807f000000 estcpu=36, cpticks=2, pctcpu=0.4 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 57159 202006 81612 0 2 0 syz-executor.0 57159 458179 81612 0 3 0x4000080 netcon2 syz-executor.0 57159 416424 81612 0 2 0x4000000 syz-executor.0 84430 471862 0 0 3 0x14200 bored sosplice *65528 349012 21847 0 7 0x2 syz-executor.1 81612 372113 21847 0 3 0x82 nanosleep syz-executor.0 21847 274003 2471 0 3 0x82 thrsleep syz-fuzzer 21847 239888 2471 0 3 0x4000082 nanosleep syz-fuzzer 21847 403083 2471 0 3 0x4000082 thrsleep syz-fuzzer 21847 153653 2471 0 3 0x4000082 nanosleep syz-fuzzer 21847 450908 2471 0 3 0x4000082 thrsleep syz-fuzzer 21847 429225 2471 0 3 0x4000082 thrsleep syz-fuzzer 21847 465649 2471 0 3 0x4000082 thrsleep syz-fuzzer 21847 310233 2471 0 3 0x4000082 kqread syz-fuzzer 21847 305951 2471 0 3 0x4000082 thrsleep syz-fuzzer 21847 180834 2471 0 3 0x4000082 thrsleep syz-fuzzer 2471 454956 35620 0 3 0x10008a pause ksh 35620 128328 56872 0 7 0x12 sshd 21567 136596 1 0 3 0x100083 ttyin getty 56872 286034 1 0 3 0x80 select sshd 91425 489120 65321 74 3 0x100092 bpf pflogd 65321 6019 1 0 3 0x80 netio pflogd 45500 510406 83955 73 3 0x100090 kqread syslogd 83955 120351 1 0 3 0x100082 netio syslogd 42769 280823 1 77 3 0x100090 poll dhclient 36060 269288 1 0 3 0x80 poll dhclient 90725 388432 0 0 3 0x14200 bored smr 57721 421193 0 0 2 0x14200 zerothread 88406 153332 0 0 3 0x14200 aiodoned aiodoned 11641 258065 0 0 3 0x14200 syncer update 11526 456737 0 0 3 0x14200 cleaner cleaner 40401 502579 0 0 3 0x14200 reaper reaper 58972 233993 0 0 3 0x14200 pgdaemon pagedaemon 28478 366818 0 0 3 0x14200 bored crynlk 4017 323935 0 0 3 0x14200 bored crypto 27375 282923 0 0 3 0x40014200 acpi0 acpi0 79609 406934 0 0 3 0x40014200 idle1 12060 361456 0 0 3 0x14200 bored softnet 68872 38676 0 0 3 0x14200 bored systqmp 15898 248649 0 0 3 0x14200 bored systq 36014 333389 0 0 3 0x40014200 bored softclock 5328 328932 0 0 3 0x40014200 idle0 1 189729 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &bq->bufq_mtx r = 0 (0xffff80000017ad68) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 bufq_dequeue+0x2c sys/kern/kern_bufq.c:199 #4 sdstart+0x9f sys/scsi/sd.c:683 #5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:404 [inline] #5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:420 #6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596 #7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535 #8 sdstrategy+0x187 sys/scsi/sd.c:585 #9 spec_strategy+0x74 sys/kern/spec_vnops.c:473 #10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712 #11 bwrite+0x1b9 sys/kern/vfs_bio.c:756 #12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113 #13 ffs_truncate+0xc76 #14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355 #15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 #16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886 #17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #18 Xsyscall+0x128 Process 65528 (syz-executor.1) thread 0xffff800020ddd868 (349012) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828cb930) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 #2 mi_switch+0x392 sys/kern/sched_bsd.c:435 #3 sleep_finish+0x113 sys/kern/kern_synch.c:418 #4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] #4 sleep_finish_all+0x32 sys/kern/kern_synch.c:393 #5 tsleep+0x1cc sys/kern/kern_synch.c:155 #6 biowait+0xa6 sys/kern/vfs_bio.c:1256 #7 bwrite+0x1e4 sys/kern/vfs_bio.c:765 #8 ufs_dirremove+0x291 #9 ufs_rmdir+0x247 sys/ufs/ufs/ufs_vnops.c:1328 #10 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 #11 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886 #12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e690098) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vget+0x1c8 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b2071a8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 exclusive mutex &bq->bufq_mtx r = 0 (0xffff80000017ad68) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 bufq_dequeue+0x2c sys/kern/kern_bufq.c:199 #4 sdstart+0x9f sys/scsi/sd.c:683 #5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:404 [inline] #5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:420 #6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596 #7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535 #8 sdstrategy+0x187 sys/scsi/sd.c:585 #9 spec_strategy+0x74 sys/kern/spec_vnops.c:473 #10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712 #11 bwrite+0x1b9 sys/kern/vfs_bio.c:756 #12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113 #13 ffs_truncate+0xc76 #14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355 #15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474 #16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886 #17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #18 Xsyscall+0x128 Process 35620 (sshd) thread 0xffff800020e40eb0 (128328) exclusive rwlock netlock r = 0 (0xffffffff826fbc18) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 solock+0x5a sys/kern/uipc_socket2.c:282 #2 sosend+0x559 sys/kern/uipc_socket.c:543 #3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #4 sys_write+0x83 sys/kern/sys_generic.c:285 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #6 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9497 6408K 6795K 78643K 10720 0 pcb 13 8K 8K 78643K 38 0 rtable 110 3K 6K 78643K 261 0 ifaddr 67 14K 14K 78643K 94 0 counters 43 33K 34K 78643K 45 0 ioctlops 0 0K 4K 78643K 1499 0 iov 0 0K 12K 78643K 17 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1260 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 20 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 157 0 sigio 0 0K 0K 78643K 2 0 proc 61 63K 83K 78643K 456 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 4 0 in_multi 65 3K 3K 78643K 77 0 ether_multi 1 0K 0K 78643K 3 0 mrt 0 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 223 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 119 38K 40K 78643K 1441 0 UVM aobj 7 2K 2K 78643K 7 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 10 0 NDP 9 0K 0K 78643K 16 0 temp 80 3852K 3928K 78643K 6656 0 kqueue 3 4K 9K 78643K 18 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 27 0 25 1 0 1 1 0 8 0 rtentry 112 50 0 4 2 0 2 2 0 8 0 unpcb 120 104 0 94 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 159 0 159 1 1 0 1 0 8 0 tcpcb 544 50 0 45 1 0 1 1 0 8 0 inpcb 296 356 0 348 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 9 0 2 1 0 1 1 0 8 0 pkpcb 40 2 0 2 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 pfrktable 1344 17 0 17 1 0 1 1 0 8 1 pftag 88 2 0 2 1 0 1 1 0 8 1 pfstitem 24 14 0 3 1 0 1 1 0 8 0 pfstkey 112 14 0 3 1 0 1 1 0 8 0 pfstate 328 14 0 3 2 0 2 2 0 8 0 pfrule 1360 31 0 24 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 200 0 0 13 0 13 13 0 8 0 art_table 32 202 0 0 2 0 2 2 0 8 0 art_node 16 49 0 7 1 0 1 1 0 8 0 semupl 112 5 0 5 1 0 1 1 0 8 1 semapl 112 18 0 8 1 0 1 1 0 8 0 shmpl 112 5 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1593 0 189 89 0 89 89 0 8 0 ffsino 272 1593 0 189 94 0 94 94 0 8 0 nchpl 144 1989 0 381 60 0 60 60 0 8 0 uvmvnodes 72 1660 0 0 31 0 31 31 0 8 0 vnodes 208 1660 0 0 88 0 88 88 0 8 0 namei 1024 5273 0 5273 1 0 1 1 0 8 1 percpumem 16 33 0 1 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 2 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 4 0 4 1 0 1 1 0 8 1 scxspl 192 6155 0 6155 8 2 6 7 0 8 6 plimitpl 152 19 0 11 1 0 1 1 0 8 0 sigapl 424 373 0 341 4 0 4 4 0 8 0 futexpl 56 1860 0 1860 1 0 1 1 0 8 1 knotepl 112 79 0 60 1 0 1 1 0 8 0 kqueuepl 144 26 0 24 1 0 1 1 0 8 0 pipelkpl 48 94 0 84 1 0 1 1 0 8 0 pipepl 120 188 0 169 1 0 1 1 0 8 0 fdescpl 496 357 0 341 4 1 3 3 0 8 1 filepl 152 1992 0 1891 5 0 5 5 0 8 1 lockfpl 104 20 0 19 1 0 1 1 0 8 0 lockfspl 48 8 0 7 1 0 1 1 0 8 0 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 96 143 0 134 1 0 1 1 0 8 0 zombiepl 144 341 0 341 1 0 1 1 0 8 1 processpl 984 373 0 341 5 0 5 5 0 8 0 procpl 624 668 0 625 4 0 4 4 0 8 0 sosppl 128 6 0 6 1 0 1 1 0 8 1 sockpl 400 489 0 469 4 0 4 4 0 8 1 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 177 0 0 22 0 22 22 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 180 0 0 11 0 11 11 0 8 0 bufpl 280 3810 0 133 263 0 263 263 0 8 0 anonpl 16 52757 0 36645 82 1 81 81 0 124 15 amapchunkpl 152 2081 0 1930 10 0 10 10 0 158 3 amappl16 192 1841 0 977 55 4 51 55 0 8 7 amappl15 184 62 0 59 1 0 1 1 0 8 0 amappl14 176 87 0 82 1 0 1 1 0 8 0 amappl13 168 28 0 25 1 0 1 1 0 8 0 amappl12 160 9 0 5 1 0 1 1 0 8 0 amappl11 152 54 0 38 1 0 1 1 0 8 0 amappl10 144 18 0 12 1 0 1 1 0 8 0 amappl9 136 389 0 387 1 0 1 1 0 8 0 amappl8 128 359 0 329 2 0 2 2 0 8 0 amappl7 120 117 0 107 1 0 1 1 0 8 0 amappl6 112 32 0 24 1 0 1 1 0 8 0 amappl5 104 270 0 252 1 0 1 1 0 8 0 amappl4 96 492 0 461 1 0 1 1 0 8 0 amappl3 88 169 0 164 1 0 1 1 0 8 0 amappl2 80 1974 0 1905 2 0 2 2 0 8 0 amappl1 72 17940 0 17493 23 13 10 18 0 8 0 amappl 80 923 0 876 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 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 359 0 341 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 359 0 341 1 0 1 1 0 8 0 vmmpekpl 168 6817 0 6788 2 0 2 2 0 8 0 vmmpepl 168 50620 0 48592 111 8 103 107 0 357 10 vmsppl 368 358 0 341 2 0 2 2 0 8 0 pdppl 4096 725 0 684 6 0 6 6 0 8 0 pvpl 32 169381 0 150129 192 0 192 192 0 265 35 pmappl 232 358 0 341 2 0 2 2 0 8 1 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 260 0 3 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xb1 end of kernel end trace frame: 0x7f7fffff7ad0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_read_1(800,64) at x86_bus_space_io_read_1 cnputc(64) at cnputc+0x4c sys/dev/cons.c:239 kputchar(64,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700 panic(ffffffff823fdf6d) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff823fdf6d) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff8291f248) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff8291f248) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff8291f248,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000ad9760) at tcp_output+0x14e6 tcp_usrreq(fffffd806eae1af8,9,fffffd806c9b2100,0,0,ffff800020e40eb0) at tcp_usrreq+0xa55 sosend(fffffd806eae1af8,0,ffff800020e22f28,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 end trace frame: 0xffff800020e22f10, count: 0 ddb{1}> trace x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_read_1(800,64) at x86_bus_space_io_read_1 cnputc(64) at cnputc+0x4c sys/dev/cons.c:239 kputchar(64,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700 panic(ffffffff823fdf6d) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff823fdf6d) at panic+0xf3 sys/kern/subr_prf.c:197 pool_cache_get(ffffffff8291f248) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff8291f248) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff8291f248,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000ad9760) at tcp_output+0x14e6 tcp_usrreq(fffffd806eae1af8,9,fffffd806c9b2100,0,0,ffff800020e40eb0) at tcp_usrreq+0xa55 sosend(fffffd806eae1af8,0,ffff800020e22f28,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff800020e40eb0,4,ffff800020e22f28,0,ffff800020e23010) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020e40eb0,ffff800020e22fc0,ffff800020e23010) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e23090) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e23090) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbb640, count: -18