On 7/22/26 10:01, Steve Kargl wrote:
Just received the following panic. I was using openvpn at the time of
the panic. If I look at core.txt.2, I see
Tue Jul 21 20:51:38 PDT 2026
Jul 22 08:47:37 hotrats su[4849]: kargl to root on /dev/pts/3
ovpn0: changing name to 'tun0'
tun0: link state changed to UP
Jul 22 08:48:45 hotrats openvpn[4908]: event_wait : Interrupted system
call (fd=-1,code=4)
ovpn0: changing name to 'tun0'
tun0: link state changed to UP
Jul 22 09:27:42 hotrats openvpn[5673]: event_wait : Interrupted system
call (fd=-1,code=4)
panic: Memory modified after free 0xfffff8037d3a3300 (256, mbuf) + 8 =
deadc0dedead40ce
cpuid = 7
time = 1784737711
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
0xfffffe01498028f0
vpanic() at vpanic+0x136/frame 0xfffffe0149802a20
panic() at panic+0x43/frame 0xfffffe0149802a80
trash_ctor() at trash_ctor+0x74/frame 0xfffffe0149802a90
item_ctor() at item_ctor+0x59/frame 0xfffffe0149802ae0
mc_get() at mc_get+0x14c/frame 0xfffffe0149802b40
mc_uiotomc() at mc_uiotomc+0x8d/frame 0xfffffe0149802b80
uipc_sosend_stream_or_seqpacket() at
uipc_sosend_stream_or_seqpacket+0x13e/frame 0xfffffe0149802c60
sousrsend() at sousrsend+0x79/frame 0xfffffe0149802cc0
kern_sendit() at kern_sendit+0x1be/frame 0xfffffe0149802d50
sendit() at sendit+0x1ab/frame 0xfffffe0149802da0
sys_sendmsg() at sys_sendmsg+0x5b/frame 0xfffffe0149802e00
amd64_syscall() at amd64_syscall+0x169/frame 0xfffffe0149802f30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0149802f30
--- syscall (28, FreeBSD ELF64, sendmsg), rip = 0x39727abfe3ca, rsp =
0x397275edc298, rbp = 0x397275edc2c0 ---
KDB: enter: panic
I have crash dump and can upload to kargl@freefall if needed.
Additional info.
% uname -a
FreeBSD hotrats 16.0-CURRENT FreeBSD 16.0-CURRENT #0
main-n284956-de9fe28ab847: Fri Apr 10 10:15:09 PDT 2026
kargl@hotrats:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64
I'm using the 4BSD kernel.
--
steve
