panic: pool_cache_item_mapgaincic_:ch ekecrkn: elm budfiaplg nocsptu ifc reaes sleirsttio mn od"!if_ikeedr:ne ilt_lemo cka_hddelrd (0)xf"ff fffaidl8e06d:8 ef8il1eb 0"0/+s16yz k0axl0l!e=0rx/m22a9ncag6bear3s/5bm4ul8t81ic5o5r e/Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 238103 95809 0 0 0x4000000 1 syz-executor.1 * 10152 30975 0 0 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821fa911) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82649900,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 ip6_fragment(fffffd806d65c300,28,11,500) at ip6_fragment+0xec sys/netinet6/ip6_output.c:810 ip6_output(fffffd806d65c300,0,fffffd806f6e3a48,0,0,fffffd806f6e39d8) at ip6_output+0x1b92 sys/netinet6/ip6_output.c:736 udp6_output(fffffd806f6e39d8,fffffd806525e800,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236 sosend(fffffd8066ca8980,0,ffff800023187cc0,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:549 sendit(ffff800020ec69d8,a,ffff800023187da0,a,ffff800023187e80) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020ec69d8,ffff800023187e38,ffff800023187e80) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff800023187f00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023187f00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfd659630ab0, count: 2 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 0xfffffd8068e81b00+16 0x0!=0x229c6ba35b488155 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821fa911) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82649900,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 ip6_fragment(fffffd806d65c300,28,11,500) at ip6_fragment+0xec sys/netinet6/ip6_output.c:810 ip6_output(fffffd806d65c300,0,fffffd806f6e3a48,0,0,fffffd806f6e39d8) at ip6_output+0x1b92 sys/netinet6/ip6_output.c:736 udp6_output(fffffd806f6e39d8,fffffd806525e800,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236 sosend(fffffd8066ca8980,0,ffff800023187cc0,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:549 sendit(ffff800020ec69d8,a,ffff800023187da0,a,ffff800023187e80) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020ec69d8,ffff800023187e38,ffff800023187e80) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff800023187f00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023187f00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfd659630ab0, count: -13 ddb{0}> show registers rdi 0xffffffff817718b7 db_enter+0x17 rsi 0x78dc __ALIGN_SIZE+0x68dc rbp 0xffff800023187620 rbx 0xffff8000231876d0 rdx 0x78dd __ALIGN_SIZE+0x68dd rcx 0xffff800020f72000 rax 0xffff800020f72000 r8 0xffffffff8136065f kprintf+0x16f r9 0x1 r10 0x2 r11 0xa1264cdc3a1afd6b r12 0x3000000008 r13 0xffff800023187630 r14 0x100 r15 0x1 rip 0xffffffff817718b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023187610 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=10152 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ec6c48,0xffff800020ec6028 process=0xffff800020e92ba8 user=0xffff800023182000, vmspace=0xfffffd807f0008a0 estcpu=36, cpticks=7, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95809 242746 48444 0 2 0 syz-executor.1 95809 238103 48444 0 7 0x4000000 syz-executor.1 30975 500394 64692 0 2 0 syz-executor.0 *30975 10152 64692 0 7 0x4000000 syz-executor.0 70430 210873 0 0 3 0x14200 bored sosplice 48444 350673 53095 0 3 0x82 nanosleep syz-executor.1 64692 320720 53095 0 3 0x82 nanosleep syz-executor.0 53095 25743 66944 0 3 0x82 thrsleep syz-fuzzer 53095 423466 66944 0 3 0x4000082 thrsleep syz-fuzzer 53095 189674 66944 0 3 0x4000082 thrsleep syz-fuzzer 53095 490459 66944 0 3 0x4000082 kqread syz-fuzzer 53095 294815 66944 0 3 0x4000082 thrsleep syz-fuzzer 53095 194630 66944 0 3 0x4000082 thrsleep syz-fuzzer 53095 347606 66944 0 3 0x4000082 thrsleep syz-fuzzer 53095 177281 66944 0 3 0x4000082 thrsleep syz-fuzzer 53095 508259 66944 0 3 0x4000082 thrsleep syz-fuzzer 53095 421349 66944 0 3 0x4000082 thrsleep syz-fuzzer 53095 511420 66944 0 3 0x4000082 thrsleep syz-fuzzer 66944 484666 70351 0 3 0x10008a pause ksh 70351 229382 15950 0 3 0x92 select sshd 72719 487189 1 0 3 0x100083 ttyin getty 15950 215115 1 0 3 0x80 select sshd 14228 345600 92529 74 3 0x100092 bpf pflogd 92529 359695 1 0 3 0x80 netio pflogd 29601 42136 96937 73 3 0x100090 kqread syslogd 96937 27125 1 0 3 0x100082 netio syslogd 33521 50337 1 77 3 0x100090 poll dhclient 97859 72608 1 0 3 0x80 poll dhclient 60576 110894 0 0 3 0x14200 bored smr 61956 386441 0 0 2 0x14200 zerothread 78131 113619 0 0 3 0x14200 aiodoned aiodoned 67353 64128 0 0 3 0x14200 syncer update 19963 450001 0 0 3 0x14200 cleaner cleaner 85928 473425 0 0 3 0x14200 reaper reaper 60329 394435 0 0 3 0x14200 pgdaemon pagedaemon 84259 283489 0 0 3 0x14200 bored crynlk 17983 14672 0 0 3 0x14200 bored crypto 18108 2157 0 0 3 0x40014200 acpi0 acpi0 14202 389691 0 0 3 0x40014200 idle1 8633 104372 0 0 3 0x14200 bored softnet 9234 464225 0 0 3 0x14200 bored systqmp 30105 44675 0 0 3 0x14200 bored systq 46723 464241 0 0 3 0x40014200 bored softclock 41176 134400 0 0 3 0x40014200 idle0 1 477621 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 30975 (syz-executor.0) thread 0xffff800020ec69d8 (10152) exclusive rwlock netlock r = 0 (0xffffffff824a2978) #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:537 #3 sendit+0x52b sys/kern/uipc_syscalls.c:657 #4 sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 #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 9520 6424K 6940K 78643K 10985 0 pcb 13 8K 8K 78643K 58 0 rtable 96 3K 4K 78643K 274 0 ifaddr 69 13K 14K 78643K 104 0 counters 43 33K 34K 78643K 53 0 ioctlops 0 0K 4K 78643K 1487 0 iov 0 0K 16K 78643K 28 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1319 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 30 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 205 0 sigio 0 0K 0K 78643K 18 0 proc 61 63K 83K 78643K 448 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 20 0 in_multi 32 2K 2K 78643K 69 0 ether_multi 1 0K 0K 78643K 6 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 227 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 125 39K 43K 78643K 1619 0 UVM aobj 13 7K 7K 78643K 19 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 28 0 NDP 12 0K 0K 78643K 23 0 temp 110 3044K 3116K 78643K 8687 0 kqueue 5 5K 8K 78643K 21 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 39 0 37 1 0 1 1 0 8 0 rtentry 112 54 0 16 2 0 2 2 0 8 0 unpcb 120 142 0 130 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 73 0 73 2 2 0 1 0 8 0 tcpcb 544 222 0 218 1 0 1 1 0 8 0 inpcb 280 441 0 432 2 0 2 2 0 8 1 nd6 48 9 0 7 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 45 0 45 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 pfstitem 24 33 0 4 1 0 1 1 0 8 0 pfstkey 112 33 0 4 1 0 1 1 0 8 0 pfstate 328 33 0 4 3 0 3 3 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 256 251 0 95 13 0 13 13 0 8 0 art_table 32 252 0 95 2 0 2 2 0 8 0 art_node 16 53 0 17 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 10 1 1 0 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 22 0 12 1 0 1 1 0 8 0 shmpl 112 17 0 6 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1677 0 267 89 0 89 89 0 8 0 ffsino 272 1677 0 267 95 0 95 95 0 8 0 nchpl 144 2145 0 538 60 0 60 60 0 8 0 uvmvnodes 72 1792 0 0 33 0 33 33 0 8 0 vnodes 208 1792 0 0 95 0 95 95 0 8 0 namei 1024 5745 0 5745 1 0 1 1 0 8 1 percpumem 16 37 0 5 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 6 0 4 1 0 1 1 0 8 0 scxspl 192 5959 0 5959 6 4 2 5 0 8 2 plimitpl 152 31 0 23 1 0 1 1 0 8 0 sigapl 424 421 0 388 4 0 4 4 0 8 0 futexpl 56 3085 0 3085 1 0 1 1 0 8 1 knotepl 112 84 0 64 1 0 1 1 0 8 0 kqueuepl 144 47 0 44 1 0 1 1 0 8 0 pipelkpl 48 111 0 101 1 0 1 1 0 8 0 pipepl 120 222 0 203 1 0 1 1 0 8 0 fdescpl 496 405 0 388 3 0 3 3 0 8 0 filepl 152 2416 0 2311 5 0 5 5 0 8 0 lockfpl 104 59 0 58 1 0 1 1 0 8 0 lockfspl 48 22 0 21 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 22 0 11 1 0 1 1 0 8 0 ucredpl 96 161 0 151 1 0 1 1 0 8 0 zombiepl 144 388 0 388 1 0 1 1 0 8 1 processpl 984 421 0 388 5 0 5 5 0 8 0 procpl 624 834 0 789 5 0 5 5 0 8 1 sosppl 128 5 0 5 2 1 1 1 0 8 1 sockpl 400 624 0 601 5 0 5 5 0 8 2 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 169 0 0 21 0 21 21 0 8 0 mtagpl 80 40 0 0 1 0 1 1 0 8 0 mbufpl 256 281 0 0 17 0 17 17 0 8 0 bufpl 280 3772 0 135 260 0 260 260 0 8 0 anonpl 16 61063 0 47044 73 1 72 72 0 124 14 amapchunkpl 152 2145 0 2003 10 3 7 10 0 158 1 amappl16 192 2371 0 1626 53 9 44 49 0 8 6 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 24 0 19 1 0 1 1 0 8 0 amappl13 168 110 0 107 1 0 1 1 0 8 0 amappl12 160 9 0 4 1 0 1 1 0 8 0 amappl11 152 54 0 39 1 0 1 1 0 8 0 amappl10 144 31 0 23 1 0 1 1 0 8 0 amappl9 136 382 0 381 1 0 1 1 0 8 0 amappl8 128 347 0 315 2 0 2 2 0 8 0 amappl7 120 125 0 112 1 0 1 1 0 8 0 amappl6 112 22 0 19 2 1 1 1 0 8 0 amappl5 104 307 0 289 1 0 1 1 0 8 0 amappl4 96 569 0 540 1 0 1 1 0 8 0 amappl3 88 103 0 98 1 0 1 1 0 8 0 amappl2 80 2294 0 2215 2 0 2 2 0 8 0 amappl1 72 19005 0 18551 24 14 10 18 0 8 0 amappl 80 1089 0 1041 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 18 0 6 1 0 1 1 0 8 0 uaddrrnd 24 411 0 392 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 411 0 392 1 0 1 1 0 8 0 vmmpekpl 168 6924 0 6890 2 0 2 2 0 8 0 vmmpepl 168 56404 0 54393 111 12 99 104 0 357 11 vmsppl 368 410 0 392 2 0 2 2 0 8 0 pdppl 4096 830 0 786 6 0 6 6 0 8 0 pvpl 32 187048 0 169307 174 0 174 174 0 265 30 pmappl 232 410 0 392 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 266 0 3 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821fa911) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82649900,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 ip6_fragment(fffffd806d65c300,28,11,500) at ip6_fragment+0xec sys/netinet6/ip6_output.c:810 ip6_output(fffffd806d65c300,0,fffffd806f6e3a48,0,0,fffffd806f6e39d8) at ip6_output+0x1b92 sys/netinet6/ip6_output.c:736 udp6_output(fffffd806f6e39d8,fffffd806525e800,0,0) at udp6_output+0x36a sys/netinet6/udp6_output.c:236 sosend(fffffd8066ca8980,0,ffff800023187cc0,0,0,8a) at sosend+0x671 sys/kern/uipc_socket.c:549 sendit(ffff800020ec69d8,a,ffff800023187da0,a,ffff800023187e80) at sendit+0x52b sys/kern/uipc_syscalls.c:657 sys_sendto(ffff800020ec69d8,ffff800023187e38,ffff800023187e80) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522 syscall(ffff800023187f00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023187f00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfd659630ab0, count: -13 ddb{0}> machine ddbcpu 1