https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236853
Bug ID: 236853
Summary: panic: page fault on rtsock.c
Product: Base System
Version: CURRENT
Hardware: i386
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
The system panics on /usr/src/sys/net/rtsock.c:839 and all references to
ifp->if_addr->ifa_addr the pointer ifp->if_addr is invalid. some race
condition occurs that releases the ifp->if_addr and when the code tries to read
the next pointer a page fault occurs.... sometimes it happens in
/usr/src/sys/net/rtsock.c:1581 too
how to reproduce:
setup (1) a freebsd 12 or 13 as a ppp-in server (man ppp) using the setup in
the example at http://www.k1.com.br/crash/ppp, than go to another freebsd and
using the ppptun.conf, connect to the (1) using the command ppp -ddial ppptun
after several connects and disconnects, the (1) panics... sometimes the
simple route get "any ppp address" is enough to panic the system.
The resulting debug files of the panic is in the http://www.k1.com.br/crash
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