login: panic: pool_cache_item_magic_pchaencikc:: mkberunfepll dcpiuag nfroseet icl isats semordtiiofnie d":!_ kietermne ald_dlor ck0_xfheffldf(fd)8" 06ffa3il5e4cd:0 f0+il1e6 0"x/s0!yz=k0xa3l5le5rad/m7and9ag16ercs9f/maau1l ti cStopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 110145 75138 0 0 0x4000000 1 syz-executor.1 * 78837 12224 0 0 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821f8ccd) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82679e88) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82679e88) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82679e88,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_get(2,1) at m_get+0x4c sys/kern/uipc_mbuf.c:250 switchwrite(a6138,ffff800023189150,1) at switchwrite+0x260 sys/net/switchctl.c:260 spec_write(ffff800023188f20) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8063e65768,ffff800023189150,1,fffffd807f7bf840) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 vn_write(fffffd8065bd2e58,ffff800023189150,1) at vn_write+0x198 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800020ed9398,3,ffff800023189150,1,ffff800023189240) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_pwritev(ffff800020ed9398,ffff8000231891f8,ffff800023189240) at sys_pwritev+0xb8 sys/kern/vfs_syscalls.c:3338 syscall(ffff8000231892c0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000231892c0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xda80de76f40, 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 0xfffffd806f354c00+16 0x0!=0x355ad7d916c9faa1 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821f8ccd) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82679e88) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82679e88) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82679e88,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_get(2,1) at m_get+0x4c sys/kern/uipc_mbuf.c:250 switchwrite(a6138,ffff800023189150,1) at switchwrite+0x260 sys/net/switchctl.c:260 spec_write(ffff800023188f20) at spec_write+0xd4 sys/kern/spec_vnops.c:309 VOP_WRITE(fffffd8063e65768,ffff800023189150,1,fffffd807f7bf840) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 vn_write(fffffd8065bd2e58,ffff800023189150,1) at vn_write+0x198 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800020ed9398,3,ffff800023189150,1,ffff800023189240) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_pwritev(ffff800020ed9398,ffff8000231891f8,ffff800023189240) at sys_pwritev+0xb8 sys/kern/vfs_syscalls.c:3338 syscall(ffff8000231892c0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000231892c0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xda80de76f40, count: -13 ddb{0}> show registers rdi 0xffffffff816cee17 db_enter+0x17 rsi 0x6132 __ALIGN_SIZE+0x5132 rbp 0xffff800023188be0 rbx 0xffff800023188c90 rdx 0x6133 __ALIGN_SIZE+0x5133 rcx 0xffff800020f6c000 rax 0xffff800020f6c000 r8 0xffffffff81dc909f kprintf+0x16f r9 0x1 r10 0x25 r11 0xf59fdae24c2e401e r12 0x3000000008 r13 0xffff800023188bf0 r14 0x100 r15 0x1 rip 0xffffffff816cee18 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023188bd0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=78837 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ed8018,0xffff800020ed9618 process=0xffff800020e81af8 user=0xffff800023184000, vmspace=0xfffffd807f0008a0 estcpu=36, cpticks=3, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 75138 255669 87032 0 2 0 syz-executor.1 75138 110145 87032 0 7 0x4000000 syz-executor.1 12224 498523 5693 0 2 0 syz-executor.0 *12224 78837 5693 0 7 0x4000000 syz-executor.0 87032 78964 9544 0 3 0x82 nanosleep syz-executor.1 5693 102347 9544 0 3 0x82 nanosleep syz-executor.0 9544 378382 41031 0 3 0x82 thrsleep syz-fuzzer 9544 425989 41031 0 3 0x4000082 thrsleep syz-fuzzer 9544 55497 41031 0 3 0x4000082 thrsleep syz-fuzzer 9544 210936 41031 0 3 0x4000082 thrsleep syz-fuzzer 9544 181886 41031 0 3 0x4000082 thrsleep syz-fuzzer 9544 247239 41031 0 3 0x4000082 thrsleep syz-fuzzer 9544 358875 41031 0 3 0x4000082 thrsleep syz-fuzzer 9544 407456 41031 0 3 0x4000082 thrsleep syz-fuzzer 9544 465255 41031 0 3 0x4000082 kqread syz-fuzzer 9544 265009 41031 0 3 0x4000082 thrsleep syz-fuzzer 41031 354820 86404 0 3 0x10008a pause ksh 86404 446184 43932 0 3 0x92 select sshd 56210 288681 1 0 3 0x100083 ttyin getty 43932 227756 1 0 3 0x80 select sshd 68043 220552 44132 74 3 0x100092 bpf pflogd 44132 467797 1 0 3 0x80 netio pflogd 7632 409976 38490 73 3 0x100090 kqread syslogd 38490 115497 1 0 3 0x100082 netio syslogd 33424 354317 1 77 3 0x100090 poll dhclient 79753 260254 1 0 3 0x80 poll dhclient 47967 28298 0 0 3 0x14200 bored smr 40039 176749 0 0 2 0x14200 zerothread 89805 318289 0 0 3 0x14200 aiodoned aiodoned 75202 114488 0 0 3 0x14200 syncer update 96084 185417 0 0 3 0x14200 cleaner cleaner 68835 389250 0 0 3 0x14200 reaper reaper 57403 106921 0 0 3 0x14200 pgdaemon pagedaemon 95249 257273 0 0 3 0x14200 bored crynlk 83825 460020 0 0 3 0x14200 bored crypto 13340 520370 0 0 3 0x40014200 acpi0 acpi0 22033 60755 0 0 3 0x40014200 idle1 14961 336880 0 0 3 0x14200 bored softnet 16109 395255 0 0 3 0x14200 bored systqmp 72504 229053 0 0 3 0x14200 bored systq 19360 129865 0 0 3 0x40014200 bored softclock 55347 46413 0 0 3 0x40014200 idle0 1 137931 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 12224 (syz-executor.0) thread 0xffff800020ed9398 (78837) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff826697d8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 vn_write+0x42 sys/kern/vfs_vnops.c:399 #2 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #3 sys_pwritev+0xb8 sys/kern/vfs_syscalls.c:3338 #4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9487 6466K 6466K 78643K 10579 0 pcb 13 8K 8K 78643K 23 0 rtable 105 3K 3K 78643K 201 0 ifaddr 49 11K 11K 78643K 52 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1469 0 iov 1 0K 2K 78643K 2 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 77K 77K 78643K 1225 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 4 0K 0K 78643K 4 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 6 17K 25K 78643K 47 0 sigio 0 0K 0K 78643K 1 0 proc 59 63K 95K 78643K 438 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 33 2K 2K 78643K 33 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 31 148K 148K 78643K 31 0 exec 0 0K 1K 78643K 207 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 113 22K 22K 78643K 1047 0 UVM aobj 2 2K 2K 78643K 4 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 4 0 NDP 7 0K 0K 78643K 11 0 temp 73 3036K 3100K 78643K 2098 0 kqueue 3 4K 4K 78643K 3 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 19 0 17 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 37 0 27 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 777 0 777 1 0 1 1 0 8 1 tcpcb 544 14 0 10 1 0 1 1 0 8 0 inpcb 280 51 0 44 1 0 1 1 0 8 0 nd6 48 6 0 0 1 0 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 14 0 0 1 0 1 1 0 8 0 pfstkey 112 14 0 0 1 0 1 1 0 8 0 pfstate 328 14 0 0 2 0 2 2 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 256 188 0 0 12 0 12 12 0 8 0 art_table 32 189 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 2 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 2 1 0 1 1 0 8 1 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1450 0 40 89 0 89 89 0 8 0 ffsino 272 1450 0 40 95 0 95 95 0 8 0 nchpl 144 1698 0 76 61 0 61 61 0 8 0 uvmvnodes 72 1495 0 0 28 0 28 28 0 8 0 vnodes 208 1495 0 0 79 0 79 79 0 8 0 namei 1024 4401 0 4401 1 0 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 192 4996 0 4996 2 1 1 2 0 8 1 plimitpl 152 15 0 7 1 0 1 1 0 8 0 sigapl 424 262 0 230 4 0 4 4 0 8 0 futexpl 56 278 0 278 1 0 1 1 0 8 1 knotepl 112 53 0 34 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipelkpl 48 76 0 66 1 0 1 1 0 8 0 pipepl 120 152 0 133 1 0 1 1 0 8 0 fdescpl 496 247 0 230 3 0 3 3 0 8 0 filepl 152 1237 0 1136 5 0 5 5 0 8 1 lockfpl 104 8 0 7 1 0 1 1 0 8 0 lockfspl 48 4 0 3 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 77 0 68 1 0 1 1 0 8 0 zombiepl 144 230 0 230 1 0 1 1 0 8 1 processpl 984 262 0 230 5 0 5 5 0 8 1 procpl 624 294 0 251 4 0 4 4 0 8 0 sockpl 400 107 0 88 3 0 3 3 0 8 1 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 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 224 0 0 27 0 27 27 0 8 0 mtagpl 80 2 0 0 1 0 1 1 0 8 0 mbufpl 256 215 0 0 14 1 13 13 0 8 0 bufpl 280 4152 0 190 283 0 283 283 0 8 0 anonpl 16 37502 0 23321 58 1 57 57 0 124 0 amapchunkpl 152 1099 0 965 8 0 8 8 0 158 1 amappl16 192 922 0 160 39 0 39 39 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 27 0 20 1 0 1 1 0 8 0 amappl13 168 42 0 37 1 0 1 1 0 8 0 amappl12 160 6 0 3 2 1 1 1 0 8 0 amappl11 152 58 0 42 1 0 1 1 0 8 0 amappl10 144 39 0 28 1 0 1 1 0 8 0 amappl9 136 392 0 391 1 0 1 1 0 8 0 amappl8 128 333 0 302 2 0 2 2 0 8 0 amappl7 120 125 0 113 1 0 1 1 0 8 0 amappl6 112 28 0 22 1 0 1 1 0 8 0 amappl5 104 146 0 129 1 0 1 1 0 8 0 amappl4 96 489 0 458 2 0 2 2 0 8 1 amappl3 88 110 0 102 1 0 1 1 0 8 0 amappl2 80 1015 0 939 3 0 3 3 0 8 1 amappl1 72 15702 0 15250 25 8 17 20 0 8 7 amappl 80 538 0 494 1 0 1 1 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 3 0 2 1 0 1 1 0 8 0 uaddrrnd 24 247 0 230 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 247 0 230 1 0 1 1 0 8 0 vmmpekpl 168 5891 0 5861 2 0 2 2 0 8 0 vmmpepl 168 37298 0 35282 115 2 113 113 0 357 25 vmsppl 368 246 0 230 2 0 2 2 0 8 0 pdppl 4096 502 0 460 6 0 6 6 0 8 0 pvpl 32 133315 0 115811 142 0 142 142 0 265 0 pmappl 232 246 0 230 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 265 0 4 8 0 8 8 0 8 0