login: panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806dc0c400+16 0x0!=0x5b000609c305d748 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *131465 67881 0 0x14000 0x40000200 0K softclock db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82400dc2) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82909cd0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82909cd0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82909cd0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_get(2,3) at m_get+0x4c sys/kern/uipc_mbuf.c:250 sbappendaddr(fffffd806f685190,fffffd806f685218,ffffffff825e16f8,fffffd806dc0c300,0) at sbappendaddr+0x2e9 sys/kern/uipc_socket2.c:804 rtm_sendup(fffffd806f685190,fffffd806dc0c300,0) at rtm_sendup+0xef sys/net/rtsock.c:594 route_input(fffffd806dc0c300,0,18) at route_input+0x489 sys/net/rtsock.c:572 rtm_addr(14,ffff800000aa2e00) at rtm_addr+0x10b sys/net/rtsock.c:1751 nd6_dad_timer(ffff800000aa2e00) at nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244 timeout_run(ffff800000af2030) at timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:184 [inline] timeout_run(ffff800000af2030) at timeout_run+0xc4 sys/kern/kern_timeout.c:490 softclock_thread(ffff800020d895f0) at softclock_thread+0x16a sys/kern/kern_timeout.c:580 end trace frame: 0x0, 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 0xfffffd806dc0c400+16 0x0!=0x5b000609c305d748 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82400dc2) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82909cd0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82909cd0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82909cd0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_get(2,3) at m_get+0x4c sys/kern/uipc_mbuf.c:250 sbappendaddr(fffffd806f685190,fffffd806f685218,ffffffff825e16f8,fffffd806dc0c300,0) at sbappendaddr+0x2e9 sys/kern/uipc_socket2.c:804 rtm_sendup(fffffd806f685190,fffffd806dc0c300,0) at rtm_sendup+0xef sys/net/rtsock.c:594 route_input(fffffd806dc0c300,0,18) at route_input+0x489 sys/net/rtsock.c:572 rtm_addr(14,ffff800000aa2e00) at rtm_addr+0x10b sys/net/rtsock.c:1751 nd6_dad_timer(ffff800000aa2e00) at nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244 timeout_run(ffff800000af2030) at timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:184 [inline] timeout_run(ffff800000af2030) at timeout_run+0xc4 sys/kern/kern_timeout.c:490 softclock_thread(ffff800020d895f0) at softclock_thread+0x16a sys/kern/kern_timeout.c:580 end trace frame: 0x0, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020d97150 rbx 0xffff800020d97200 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff8146beef kprintf+0x16f r9 0x1 r10 0x2 r11 0x66647852e7054b02 r12 0x3000000008 r13 0xffff800020d97160 r14 0x100 r15 0x1 rip 0xffffffff82125b18 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020d97140 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (softclock) pid=131465 stat=onproc flags process=14000 proc=40000200 pri=0, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020d89860,0xffff800020d89120 process=0xffff800020d8a000 user=0xffff800020d92000, vmspace=0xffffffff82905068 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 39761 24101 72609 0 3 0x2 biowait syz-executor.0 72609 242187 96695 0 3 0x82 kqread syz-execprog 72609 289096 96695 0 3 0x4000082 nanosleep syz-execprog 72609 429995 96695 0 3 0x4000082 thrsleep syz-execprog 72609 182249 96695 0 3 0x4000082 thrsleep syz-execprog 72609 213341 96695 0 3 0x4000082 thrsleep syz-execprog 72609 446321 96695 0 3 0x4000082 nanosleep syz-execprog 72609 503246 96695 0 3 0x4000082 thrsleep syz-execprog 72609 501812 96695 0 3 0x4000082 thrsleep syz-execprog 72609 190199 96695 0 3 0x4000082 thrsleep syz-execprog 96695 503474 65875 0 3 0x10008a pause ksh 65875 16342 43111 0 3 0x92 select sshd 32131 450 1 0 3 0x100083 ttyin getty 43111 30116 1 0 3 0x80 select sshd 73927 462135 72007 74 3 0x100092 bpf pflogd 72007 143527 1 0 3 0x80 netio pflogd 69058 206760 65173 73 3 0x100090 kqread syslogd 65173 385713 1 0 3 0x100082 netio syslogd 28592 288496 1 77 3 0x100090 poll dhclient 39721 178432 1 0 3 0x80 poll dhclient 93880 358487 0 0 3 0x14200 bored smr 22403 237590 0 0 3 0x14200 pgzero zerothread 26444 284265 0 0 3 0x14200 aiodoned aiodoned 69979 160581 0 0 3 0x14200 syncer update 23642 280757 0 0 3 0x14200 cleaner cleaner 53601 155024 0 0 3 0x14200 reaper reaper 70626 66103 0 0 3 0x14200 pgdaemon pagedaemon 94738 52870 0 0 3 0x14200 bored crynlk 76130 111694 0 0 3 0x14200 bored crypto 66718 31015 0 0 3 0x40014200 acpi0 acpi0 25627 486830 0 0 7 0x40014200 idle1 82845 377826 0 0 2 0x14200 softnet 68345 453682 0 0 3 0x14200 bored systqmp 82796 351356 0 0 3 0x14200 bored systq *67881 131465 0 0 7 0x40014200 softclock 27381 70754 0 0 3 0x40014200 idle0 1 476334 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 39761 (syz-executor.0) thread 0xffff800020ddc008 (24101) exclusive rrwlock inode r = 0 (0xfffffd806b7d75e8) #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 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358 #5 ffs_inode_alloc+0x1e2 sys/ufs/ffs/ffs_alloc.c:394 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b7d73c8) #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 domkdirat+0x75 sys/kern/vfs_syscalls.c:3036 #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 Process 67881 (softclock) thread 0xffff800020d895f0 (131465) exclusive rwlock netlock r = 0 (0xffffffff826ebad8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 nd6_dad_timer+0x34 sys/netinet6/nd6_nbr.c:1170 #2 timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:184 [inline] #2 timeout_run+0xc4 sys/kern/kern_timeout.c:490 #3 softclock_thread+0x16a sys/kern/kern_timeout.c:580 #4 proc_trampoline+0x1c shared rwlock timeout r = 0 (0xffffffff827a83b0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 timeout_run+0xb9 sys/kern/kern_timeout.c:489 #2 softclock_thread+0x16a sys/kern/kern_timeout.c:580 #3 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8290c8b8) #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 softclock_thread+0x103 sys/kern/kern_timeout.c:575 #5 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9467 6396K 6396K 78643K 10560 0 pcb 13 8K 8K 78643K 13 0 rtable 83 2K 2K 78643K 163 0 ifaddr 37 9K 9K 78643K 67 0 counters 41 33K 33K 78643K 41 0 ioctlops 0 0K 4K 78643K 1468 0 mount 1 1K 1K 78643K 1 0 vnodes 1183 74K 75K 78643K 1188 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 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 2 4K 12K 78643K 46 0 proc 59 63K 83K 78643K 398 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 22 1K 1K 78643K 22 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 19 95K 95K 78643K 19 0 exec 0 0K 1K 78643K 197 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 75 12K 12K 78643K 980 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 7 0K 0K 78643K 7 0 temp 29 3853K 3917K 78643K 1927 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 4 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 17 0 15 1 0 1 1 0 8 0 rtentry 112 34 0 1 1 0 1 1 0 8 0 unpcb 120 29 0 19 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 296 62 0 56 1 0 1 1 0 8 0 nd6 48 3 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 11 0 2 1 0 1 1 0 8 0 pfstkey 112 11 0 2 1 0 1 1 0 8 0 pfstate 328 11 0 2 1 0 1 1 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 256 144 0 0 9 0 9 9 0 8 0 art_table 32 145 0 0 2 0 2 2 0 8 0 art_node 16 33 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1453 0 51 88 0 88 88 0 8 0 ffsino 272 1453 0 51 94 0 94 94 0 8 0 nchpl 144 1700 0 97 60 0 60 60 0 8 0 uvmvnodes 72 1463 0 0 27 0 27 27 0 8 0 vnodes 208 1463 0 0 77 0 77 77 0 8 0 namei 1024 4345 0 4344 2 1 1 1 0 8 0 percpumem 16 31 0 0 1 0 1 1 0 8 0 scxspl 192 4786 0 4785 9 2 7 7 0 8 6 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 424 269 0 240 4 0 4 4 0 8 0 knotepl 112 47 0 36 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipepl 304 77 0 70 2 1 1 1 0 8 0 fdescpl 496 254 0 240 3 0 3 3 0 8 0 filepl 152 1173 0 1115 3 0 3 3 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 62 0 53 1 0 1 1 0 8 0 zombiepl 144 240 0 240 2 1 1 1 0 8 1 processpl 992 269 0 240 5 0 5 5 0 8 1 procpl 624 277 0 240 4 0 4 4 0 8 1 sockpl 400 108 0 90 2 0 2 2 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 80 0 0 10 0 10 10 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 108 0 0 6 0 6 6 0 8 0 mbufpl: pool(0xffffffff82909cd0:mbufpl): free list modified: page 0xfffffd806f281000; item ordinal 2; addr 0xfffffd806f281600 (p 0xfffffd806f70a000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd806f281000; item ordinal 2; addr 0xfffffd806f281600 (p 0xfffffd806f70a000); offset 0x0=0x0 mbufpl: pool(0xffffffff82909cd0:mbufpl): page inconsistency: page 0xfffffd806f281000; item ordinal 3; addr 0x6ed60e573dfd848e bufpl 280 3077 0 133 211 0 211 211 0 8 0 anonpl 16 23034 0 21387 14 2 12 12 0 124 4 amapchunkpl 152 871 0 805 4 0 4 4 0 158 0 amappl16 192 293 0 257 3 0 3 3 0 8 0 amappl15 184 3 0 2 2 1 1 1 0 8 0 amappl14 176 31 0 26 1 0 1 1 0 8 0 amappl13 168 22 0 20 2 1 1 1 0 8 0 amappl12 160 8 0 8 2 1 1 1 0 8 1 amappl11 152 54 0 39 1 0 1 1 0 8 0 amappl10 144 17 0 14 1 0 1 1 0 8 0 amappl9 136 235 0 234 1 0 1 1 0 8 0 amappl8 128 272 0 264 1 0 1 1 0 8 0 amappl7 120 119 0 108 1 0 1 1 0 8 0 amappl6 112 23 0 20 1 0 1 1 0 8 0 amappl5 104 153 0 139 1 0 1 1 0 8 0 amappl4 96 498 0 469 1 0 1 1 0 8 0 amappl3 88 106 0 100 1 0 1 1 0 8 0 amappl2 80 968 0 909 3 1 2 2 0 8 0 amappl1 72 15431 0 15018 23 5 18 18 0 8 8 amappl 80 504 0 476 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 254 0 240 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 254 0 240 1 0 1 1 0 8 0 vmmpekpl 168 6453 0 6425 2 0 2 2 0 8 0 vmmpepl 168 34178 0 33249 82 10 72 72 0 357 29 vmsppl 368 253 0 240 2 0 2 2 0 8 0 pdppl 4096 515 0 480 6 0 6 6 0 8 1 pvpl 32 116658 0 112631 109 5 104 104 0 265 69 pmappl 232 253 0 240 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 233 0 4 7 0 7 7 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(ffffffff82400dc2) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82909cd0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82909cd0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82909cd0,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_get(2,3) at m_get+0x4c sys/kern/uipc_mbuf.c:250 sbappendaddr(fffffd806f685190,fffffd806f685218,ffffffff825e16f8,fffffd806dc0c300,0) at sbappendaddr+0x2e9 sys/kern/uipc_socket2.c:804 rtm_sendup(fffffd806f685190,fffffd806dc0c300,0) at rtm_sendup+0xef sys/net/rtsock.c:594 route_input(fffffd806dc0c300,0,18) at route_input+0x489 sys/net/rtsock.c:572 rtm_addr(14,ffff800000aa2e00) at rtm_addr+0x10b sys/net/rtsock.c:1751 nd6_dad_timer(ffff800000aa2e00) at nd6_dad_timer+0x2f9 sys/netinet6/nd6_nbr.c:1244 timeout_run(ffff800000af2030) at timeout_run+0xc4 timeout_sync_leave sys/kern/kern_timeout.c:184 [inline] timeout_run(ffff800000af2030) at timeout_run+0xc4 sys/kern/kern_timeout.c:490 softclock_thread(ffff800020d895f0) at softclock_thread+0x16a sys/kern/kern_timeout.c:580 end trace frame: 0x0, count: -12 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 acpicpu_idle() at acpicpu_idle+0x331 sys/dev/acpi/acpicpu.c:1187 sched_idle(ffff800020d70ff0) at sched_idle+0x3f7 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 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 acpicpu_idle() at acpicpu_idle+0x331 sys/dev/acpi/acpicpu.c:1187 sched_idle(ffff800020d70ff0) at sched_idle+0x3f7 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5 ddb{1}>