panic: pool_cache_paitniemc:_ mkageirnce_lc hdeicagkn:o msbtuicfp al sscpeurt iforne e" !l_ikset rnmeoldi_floieckd_:h eiltde(m) "addr 0xfffffd8066083f00+16 0x0!=0xbf1d09a7cdf25cbc Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 405765 38804 0 0 0 0 syz-executor.0 * 39477 56873 0 0x12 0 1 sshd db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff8268a180) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1789 [inline] pool_cache_get(ffffffff8268a180) at pool_cache_get+0x323 sys/kern/subr_pool.c:1892 pool_get() at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd806214f100,16c,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806214f100,16c,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a82000) at tcp_output+0x151c sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806e97aa88,9,fffffd806d651600,0,0,ffff800020ac1be8) at tcp_usrreq+0xa45 sosend(fffffd806e97aa88,0,ffff800020a89d78,0,0,80) at sosend+0x645 sys/kern/uipc_socket.c:524 dofilewritev(ffff800020ac1be8,4,ffff800020a89d78,0,ffff800020a89e60) at dofilewritev+0x1b7 sys/kern/sys_generic.c:364 sys_write(ffff800020ac1be8,ffff800020a89e10,ffff800020a89e60) at sys_write+0x83 sys/kern/sys_generic.c:284 syscall(ffff800020a89ee0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020a89ee0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff2400, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd8066083f00+16 0x0!=0xbf1d09a7cdf25cbc ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff8268a180) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1789 [inline] pool_cache_get(ffffffff8268a180) at pool_cache_get+0x323 sys/kern/subr_pool.c:1892 pool_get() at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd806214f100,16c,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806214f100,16c,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a82000) at tcp_output+0x151c sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806e97aa88,9,fffffd806d651600,0,0,ffff800020ac1be8) at tcp_usrreq+0xa45 sosend(fffffd806e97aa88,0,ffff800020a89d78,0,0,80) at sosend+0x645 sys/kern/uipc_socket.c:524 dofilewritev(ffff800020ac1be8,4,ffff800020a89d78,0,ffff800020a89e60) at dofilewritev+0x1b7 sys/kern/sys_generic.c:364 sys_write(ffff800020ac1be8,ffff800020a89e10,ffff800020a89e60) at sys_write+0x83 sys/kern/sys_generic.c:284 syscall(ffff800020a89ee0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020a89ee0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff2400, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020a89720 rbx 0xffff800020a897d0 rdx 0xffff800020ac1be8 rcx 0 rax 0 r8 0xffffffff81a61d1f kprintf+0x16f r9 0x1 r10 0x25 r11 0x4e29e11d00492136 r12 0x3000000008 r13 0xffff800020a89730 r14 0x100 r15 0x1 rip 0xffffffff8157cc78 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a89710 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (sshd) pid=39477 stat=onproc flags process=12 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020ac07a8,0xffff800020ac0530 process=0xffff800020ac3238 user=0xffff800020a84000, vmspace=0xfffffd806e7be458 estcpu=0, cpticks=2, pctcpu=0.1 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 38804 405765 9051 0 7 0 syz-executor.0 9051 379283 71479 0 2 0x2 syz-executor.0 62770 259024 71479 0 2 0x2 syz-executor.1 26448 6126 0 0 3 0x14200 bored sosplice 71479 430545 79398 0 3 0x82 thrsleep syz-fuzzer 71479 127265 79398 0 3 0x4000082 nanosleep syz-fuzzer 71479 225910 79398 0 3 0x4000082 thrsleep syz-fuzzer 71479 38705 79398 0 3 0x4000082 thrsleep syz-fuzzer 71479 459138 79398 0 3 0x4000082 thrsleep syz-fuzzer 71479 292685 79398 0 3 0x4000082 thrsleep syz-fuzzer 71479 279565 79398 0 3 0x4000082 kqread syz-fuzzer 71479 44579 79398 0 3 0x4000082 thrsleep syz-fuzzer 71479 298982 79398 0 3 0x4000082 thrsleep syz-fuzzer 71479 341095 79398 0 3 0x4000082 thrsleep syz-fuzzer 79398 375224 56873 0 3 0x10008a pause ksh *56873 39477 33291 0 7 0x12 sshd 32094 48478 1 0 3 0x100083 ttyin getty 33291 509414 1 0 3 0x80 select sshd 40040 11040 37080 74 3 0x100092 bpf pflogd 37080 485504 1 0 3 0x80 netio pflogd 74674 328411 12231 73 3 0x100090 kqread syslogd 12231 132236 1 0 3 0x100082 netio syslogd 59977 226919 1 77 3 0x100090 poll dhclient 78096 20173 1 0 3 0x80 poll dhclient 24233 453373 0 0 2 0x14200 zerothread 37045 257269 0 0 3 0x14200 aiodoned aiodoned 83969 178998 0 0 3 0x14200 syncer update 24287 188158 0 0 3 0x14200 cleaner cleaner 3731 415825 0 0 3 0x14200 reaper reaper 79095 366181 0 0 3 0x14200 pgdaemon pagedaemon 14760 81575 0 0 3 0x14200 bored crynlk 32277 107270 0 0 3 0x14200 bored crypto 20084 224903 0 0 3 0x40014200 acpi0 acpi0 19044 3389 0 0 3 0x40014200 idle1 59087 809 0 0 3 0x14200 bored softnet 29475 363104 0 0 3 0x14200 bored systqmp 6706 233083 0 0 3 0x14200 bored systq 66148 29994 0 0 3 0x40014200 bored softclock 61864 141099 0 0 3 0x40014200 idle0 9439 302745 0 0 3 0x14200 bored smr 1 281602 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 9051 (syz-executor.0) thread 0xffff800020a8a7b0 (379283) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82687c48) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555 #2 Xsyscall+0x128 Process 56873 (sshd) thread 0xffff800020ac1be8 (39477) exclusive rwlock netlock r = 0 (0xffffffff8249b598) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 solock+0x5a sys/kern/uipc_socket2.c:282 #2 sosend+0x51b 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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9545 6622K 6918K 78643K 11440 0 pcb 13 8K 9K 78643K 297 0 rtable 111 4K 4K 78643K 366 0 ifaddr 74 14K 14K 78643K 141 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1493 0 iov 0 0K 16K 78643K 80 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1541 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 5 2K 2K 78643K 5 0 sem 12 1K 1K 78643K 93 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 377 0 sigio 0 0K 0K 78643K 6 0 proc 60 63K 83K 78643K 574 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 190 0 in_multi 58 3K 3K 78643K 89 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 60 265K 265K 78643K 60 0 exec 0 0K 1K 78643K 258 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 126 55K 56K 78643K 2291 0 UVM aobj 16 2K 2K 78643K 20 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 158 0 NDP 13 0K 0K 78643K 31 0 temp 141 3579K 3655K 78643K 21482 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 arp 64 10 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 96 49 0 47 1 0 1 1 0 8 0 rtentry 112 69 0 25 2 0 2 2 0 8 0 unpcb 120 272 0 261 1 0 1 1 0 8 0 syncache 280 6 0 6 3 3 0 1 0 8 0 tcpqe 32 252 0 252 3 3 0 1 0 8 0 tcpcb 640 352 0 348 3 1 2 2 0 8 1 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 2 0 2 1 1 0 1 0 8 0 inpcb 280 1060 0 1053 2 0 2 2 0 8 1 nd6 48 9 0 5 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 6 0 6 1 0 1 1 0 8 1 pffrag 232 11 0 11 1 1 0 1 0 482 0 pffrnode 88 11 0 11 1 1 0 1 0 8 0 pffrent 40 327 0 327 1 1 0 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 45 0 7 1 0 1 1 0 8 0 pfstkey 112 45 0 7 2 0 2 2 0 8 0 pfstate 328 45 0 7 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 256 330 0 114 17 3 14 14 0 8 0 art_table 32 331 0 114 2 0 2 2 0 8 0 art_node 16 68 0 28 1 0 1 1 0 8 0 sysvmsgpl 40 28 0 16 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 91 0 81 1 0 1 1 0 8 0 shmpl 112 18 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1942 0 537 46 0 46 46 0 8 0 ffsino 272 1942 0 537 95 0 95 95 0 8 0 nchpl 144 2689 0 1084 61 0 61 61 0 8 0 uvmvnodes 72 2237 0 0 41 0 41 41 0 8 0 vnodes 208 2237 0 0 118 0 118 118 0 8 0 namei 1024 7929 0 7929 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 552 3 0 0 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 0 1 1 0 8 1 scxspl 208 8246 0 8246 8 6 2 6 0 8 2 plimitpl 152 45 0 37 1 0 1 1 0 8 0 sigapl 432 569 0 554 3 1 2 3 0 8 0 futexpl 56 8427 0 8427 1 0 1 1 0 8 1 knotepl 112 132 0 113 1 0 1 1 0 8 0 kqueuepl 104 126 0 124 1 0 1 1 0 8 0 pipepl 160 616 0 597 2 0 2 2 0 8 1 fdescpl 488 570 0 554 3 0 3 3 0 8 0 filepl 152 4671 0 4571 7 1 6 6 0 8 2 lockfpl 104 176 0 175 1 0 1 1 0 8 0 lockfspl 48 43 0 42 1 0 1 1 0 8 0 sessionpl 128 20 0 9 1 0 1 1 0 8 0 pgrppl 48 25 0 14 1 0 1 1 0 8 0 ucredpl 96 316 0 307 1 0 1 1 0 8 0 zombiepl 144 554 0 554 1 0 1 1 0 8 1 processpl 928 586 0 554 5 0 5 5 0 8 0 procpl 648 1400 0 1359 5 0 5 5 0 8 1 srpgc 80 2 0 2 1 1 0 1 0 8 0 sosppl 144 6 0 6 1 1 0 1 0 8 0 sockpl 384 1393 0 1373 7 2 5 5 0 8 2 mcl64k 65536 6 0 0 1 0 1 1 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 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 166 0 0 20 0 20 20 0 8 0 mtagpl 80 15 0 0 1 0 1 1 0 8 0 mbufpl 256 257 0 0 15 0 15 15 0 8 0 bufpl 280 7067 0 1312 412 0 412 412 0 8 0 anonpl 16 83360 0 66481 92 2 90 90 0 124 7 amapchunkpl 152 3824 0 3681 14 7 7 12 0 158 0 amappl16 192 3148 0 2043 72 8 64 68 0 8 8 amappl14 176 69 0 63 1 0 1 1 0 8 0 amappl13 168 48 0 47 1 0 1 1 0 8 0 amappl12 160 15 0 11 1 0 1 1 0 8 0 amappl11 152 212 0 196 1 0 1 1 0 8 0 amappl10 144 15 0 8 1 0 1 1 0 8 0 amappl9 136 746 0 741 1 0 1 1 0 8 0 amappl8 128 315 0 282 2 0 2 2 0 8 0 amappl7 120 48 0 42 1 0 1 1 0 8 0 amappl6 112 212 0 202 1 0 1 1 0 8 0 amappl5 104 157 0 140 1 0 1 1 0 8 0 amappl4 96 873 0 843 2 1 1 2 0 8 0 amappl3 88 123 0 116 1 0 1 1 0 8 0 amappl2 80 3480 0 3417 3 1 2 3 0 8 0 amappl1 72 22653 0 22235 26 16 10 20 0 8 0 amappl 80 1697 0 1647 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 19 0 4 1 0 1 1 0 8 0 uaddrrnd 24 573 0 554 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 573 0 554 1 0 1 1 0 8 0 vmmpekpl 168 9234 0 9199 2 0 2 2 0 8 0 vmmpepl 168 79961 0 77735 164 21 143 143 0 357 39 vmsppl 368 569 0 554 2 0 2 2 0 8 0 pdppl 4096 1153 0 1111 6 0 6 6 0 8 0 pvpl 32 251959 0 232187 211 2 209 209 0 265 17 pmappl 232 572 0 554 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 168 0 6 5 0 5 5 0 8 0