panic: pool_cache_item_magic_chpeackni:c : mkbeurfnpell cdipaug fnroestei cli assts emrodtiiofni e"d!:_ kietermn eald_drlo c0kx_ffhefflfdd()80" 7fba4filc8e0d0:+ f16il e0 x0"/!s=0yxzk9aclbdl8e5r/34mca8ne4abg2e82r s /Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 180709 14751 0 0 0x4000000 1 syz-executor.1 *173392 95099 0 0x12 0 0 sshd db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821cab8d) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82642c50) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1789 [inline] pool_cache_get(ffffffff82642c50) at pool_cache_get+0x323 sys/kern/subr_pool.c:1892 pool_get(ffffffff82642c50,2) 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(ffff800000a03980) at tcp_output+0x14e6 tcp_usrreq(fffffd806e970c08,9,fffffd80621da600,0,0,ffff800020ad9b38) at tcp_usrreq+0xa55 sosend(fffffd806e970c08,0,ffff800020b033d8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:524 dofilewritev(ffff800020ad9b38,4,ffff800020b033d8,0,ffff800020b034c0) at dofilewritev+0x1b7 sys/kern/sys_generic.c:364 sys_write(ffff800020ad9b38,ffff800020b03470,ffff800020b034c0) at sys_write+0x83 sys/kern/sys_generic.c:284 syscall(ffff800020b03540) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020b03540) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc3060, count: 3 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 0xfffffd807b4fc800+16 0x0!=0x9cbd8534c8e4b282 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821cab8d) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82642c50) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1789 [inline] pool_cache_get(ffffffff82642c50) at pool_cache_get+0x323 sys/kern/subr_pool.c:1892 pool_get(ffffffff82642c50,2) 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(ffff800000a03980) at tcp_output+0x14e6 tcp_usrreq(fffffd806e970c08,9,fffffd80621da600,0,0,ffff800020ad9b38) at tcp_usrreq+0xa55 sosend(fffffd806e970c08,0,ffff800020b033d8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:524 dofilewritev(ffff800020ad9b38,4,ffff800020b033d8,0,ffff800020b034c0) at dofilewritev+0x1b7 sys/kern/sys_generic.c:364 sys_write(ffff800020ad9b38,ffff800020b03470,ffff800020b034c0) at sys_write+0x83 sys/kern/sys_generic.c:284 syscall(ffff800020b03540) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020b03540) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc3060, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020b02dd0 rbx 0xffff800020b02e80 rdx 0xffff800020ad9b38 rcx 0 rax 0 r8 0xffffffff81bc48af kprintf+0x16f r9 0x1 r10 0x25 r11 0xc25e1885b572d961 r12 0x3000000008 r13 0xffff800020b02de0 r14 0x100 r15 0x1 rip 0xffffffff8148b938 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020b02dc0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (sshd) pid=173392 stat=onproc flags process=12 proc=0 pri=51, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020ad9648,0xffff800020ad8020 process=0xffff800020aa3c50 user=0xffff800020afe000, vmspace=0xfffffd806e7a0008 estcpu=1, cpticks=2, pctcpu=0.6 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 14751 491598 7760 0 2 0 syz-executor.1 14751 180709 7760 0 7 0x4000000 syz-executor.1 67836 160562 16099 0 2 0 syz-executor.0 67836 469787 16099 0 2 0x4000000 syz-executor.0 7760 298874 96556 0 3 0x82 nanosleep syz-executor.1 38354 405886 0 0 3 0x14200 bored sosplice 29117 399467 1 0 3 0x100083 ttyin getty 16099 395260 96556 0 3 0x82 nanosleep syz-executor.0 96556 259128 56581 0 3 0x82 thrsleep syz-fuzzer 96556 106340 56581 0 3 0x4000082 nanosleep syz-fuzzer 96556 15249 56581 0 3 0x4000082 thrsleep syz-fuzzer 96556 506723 56581 0 3 0x4000082 thrsleep syz-fuzzer 96556 471812 56581 0 3 0x4000082 thrsleep syz-fuzzer 96556 402968 56581 0 3 0x4000082 nanosleep syz-fuzzer 96556 201450 56581 0 3 0x4000082 thrsleep syz-fuzzer 96556 301901 56581 0 3 0x4000082 thrsleep syz-fuzzer 96556 203885 56581 0 3 0x4000082 kqread syz-fuzzer 96556 444617 56581 0 3 0x4000082 thrsleep syz-fuzzer 56581 199541 95099 0 3 0x10008a pause ksh *95099 173392 46035 0 7 0x12 sshd 46035 365262 1 0 3 0x80 select sshd 95769 198674 87018 74 3 0x100092 bpf pflogd 87018 345406 1 0 3 0x80 netio pflogd 49398 207824 77233 73 3 0x100090 kqread syslogd 77233 514636 1 0 3 0x100082 netio syslogd 55845 369107 1 77 3 0x100090 poll dhclient 94977 415790 1 0 3 0x80 poll dhclient 6918 285950 0 0 2 0x14200 zerothread 72175 170591 0 0 3 0x14200 aiodoned aiodoned 36124 493923 0 0 3 0x14200 syncer update 49152 352496 0 0 3 0x14200 cleaner cleaner 50781 210525 0 0 3 0x14200 reaper reaper 21238 106950 0 0 3 0x14200 pgdaemon pagedaemon 73366 87216 0 0 3 0x14200 bored crynlk 9515 504611 0 0 3 0x14200 bored crypto 36960 441453 0 0 3 0x40014200 acpi0 acpi0 86580 459959 0 0 3 0x40014200 idle1 44272 212278 0 0 3 0x14200 bored softnet 14142 79272 0 0 3 0x14200 bored systqmp 51610 289966 0 0 3 0x14200 bored systq 61503 356982 0 0 3 0x40014200 bored softclock 13687 372464 0 0 3 0x40014200 idle0 81472 377017 0 0 3 0x14200 bored smr 1 33302 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive sched_lock &sched_lock r = 0 (0xffffffff82638aa0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 sleep_setup+0xe9 sys/kern/kern_synch.c:366 #2 msleep+0xe2 sleep_setup_timeout sys/kern/kern_synch.c:405 [inline] #2 msleep+0xe2 sys/kern/kern_synch.c:238 #3 taskq_next_work+0xbe sys/kern/kern_task.c:323 #4 taskq_thread+0xe5 sys/kern/kern_task.c:366 #5 proc_trampoline+0x1c Process 95099 (sshd) thread 0xffff800020ad9b38 (173392) exclusive rwlock netlock r = 0 (0xffffffff82453b98) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 solock+0x5a sys/kern/uipc_socket2.c:282 #2 sosend+0x559 sys/kern/uipc_socket.c:512 #3 dofilewritev+0x1b7 sys/kern/sys_generic.c:364 #4 sys_write+0x83 sys/kern/sys_generic.c:284 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9512 7049K 8075K 78643K 11627 0 pcb 13 8K 8K 78643K 95 0 rtable 110 4K 4K 78643K 382 0 ifaddr 71 14K 15K 78643K 148 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1484 0 iov 0 0K 16K 78643K 81 0 mount 1 1K 1K 78643K 1 0 vnodes 1228 77K 77K 78643K 1560 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 96 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 6 17K 25K 78643K 376 0 sigio 0 0K 0K 78643K 18 0 proc 60 63K 95K 78643K 526 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 27 0 in_multi 61 3K 3K 78643K 90 0 ether_multi 1 0K 0K 78643K 4 0 mrt 0 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 261 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 121 23K 32K 78643K 2278 0 UVM aobj 31 2K 2K 78643K 33 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 123 0 NDP 11 0K 0K 78643K 31 0 temp 131 3019K 3653K 78643K 8945 0 kqueue 0 0K 0K 78643K 7 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 13 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 58 0 56 1 0 1 1 0 8 0 rtentry 112 76 0 31 2 0 2 2 0 8 0 unpcb 120 269 0 259 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpqe 32 384 0 384 1 1 0 1 0 8 0 tcpcb 544 334 0 330 1 0 1 1 0 8 0 inpcb 280 994 0 987 4 1 3 3 0 8 2 nd6 48 8 0 5 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 9 0 9 2 2 0 1 0 8 0 pffrag 232 13 0 8 2 1 1 1 0 482 0 pffrnode 88 10 0 8 2 1 1 1 0 8 0 pffrent 40 385 0 355 2 1 1 1 0 8 0 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 55 0 10 1 0 1 1 0 8 0 pfstkey 112 55 0 10 2 0 2 2 0 8 0 pfstate 328 55 0 10 4 0 4 4 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 256 339 0 112 15 0 15 15 0 8 0 art_table 32 340 0 112 2 0 2 2 0 8 0 art_node 16 75 0 33 1 0 1 1 0 8 0 sysvmsgpl 40 36 0 14 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 90 0 80 1 0 1 1 0 8 0 shmpl 112 31 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2008 0 602 46 0 46 46 0 8 0 ffsino 272 2008 0 602 95 1 94 95 0 8 0 nchpl 144 2736 0 1126 61 0 61 61 0 8 0 uvmvnodes 72 2308 0 0 42 0 42 42 0 8 0 vnodes 208 2308 0 0 122 0 122 122 0 8 0 namei 1024 8234 0 8234 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 7925 0 7925 7 6 1 5 0 8 1 plimitpl 152 41 0 32 1 0 1 1 0 8 0 sigapl 432 573 0 557 3 1 2 3 0 8 0 futexpl 56 8986 0 8986 1 0 1 1 0 8 1 knotepl 112 100 0 81 1 0 1 1 0 8 0 kqueuepl 104 116 0 114 1 0 1 1 0 8 0 pipepl 160 478 0 459 3 1 2 2 0 8 1 fdescpl 488 574 0 557 3 0 3 3 0 8 0 filepl 152 4784 0 4681 9 3 6 6 0 8 1 lockfpl 104 199 0 198 1 0 1 1 0 8 0 lockfspl 48 74 0 73 1 0 1 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 22 0 11 1 0 1 1 0 8 0 ucredpl 96 418 0 409 1 0 1 1 0 8 0 zombiepl 144 557 0 557 2 1 1 1 0 8 1 processpl 904 590 0 557 4 0 4 4 0 8 0 procpl 632 1437 0 1393 5 0 5 5 0 8 1 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 14 0 14 3 2 1 1 0 8 1 sockpl 384 1333 0 1314 11 5 6 6 0 8 4 mcl64k 65536 14 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 175 0 0 21 0 21 21 0 8 0 mtagpl 80 30 0 0 1 0 1 1 0 8 0 mbufpl 256 798 0 0 50 1 49 49 0 8 0 bufpl 280 7098 0 1344 411 0 411 411 0 8 0 anonpl 16 83909 0 64481 101 11 90 94 0 125 11 amapchunkpl 152 3679 0 3520 16 6 10 12 0 158 2 amappl16 192 3077 0 2017 70 13 57 65 0 8 4 amappl15 184 435 0 428 1 0 1 1 0 8 0 amappl14 176 37 0 34 1 0 1 1 0 8 0 amappl12 160 145 0 142 1 0 1 1 0 8 0 amappl11 152 58 0 43 1 0 1 1 0 8 0 amappl10 144 14 0 8 1 0 1 1 0 8 0 amappl9 136 615 0 611 1 0 1 1 0 8 0 amappl8 128 137 0 108 1 0 1 1 0 8 0 amappl7 120 110 0 99 1 0 1 1 0 8 0 amappl6 112 59 0 49 1 0 1 1 0 8 0 amappl5 104 291 0 275 1 0 1 1 0 8 0 amappl4 96 700 0 665 1 0 1 1 0 8 0 amappl3 88 270 0 260 1 0 1 1 0 8 0 amappl2 80 3831 0 3746 3 1 2 3 0 8 0 amappl1 72 22761 0 22299 27 17 10 21 0 8 0 amappl 80 1704 0 1657 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 32 0 2 1 0 1 1 0 8 0 uaddrrnd 24 574 0 557 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 574 0 557 1 0 1 1 0 8 0 vmmpekpl 168 8906 0 8877 2 0 2 2 0 8 0 vmmpepl 168 79302 0 76948 154 33 121 140 0 357 18 vmsppl 368 573 0 557 2 0 2 2 0 8 0 pdppl 4096 1155 0 1114 7 1 6 6 0 8 0 pvpl 32 241962 0 219251 226 12 214 219 0 265 27 pmappl 232 573 0 557 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 210 0 7 6 0 6 6 0 8 0