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commit ccb49f77251f5d261a50bf16c5cde8aa1a4bfcc6
Author: David Bidner <[email protected]>
Date: Tue Sep 15 14:47:27 2026 +0200
pfinet: Handle a missing default IPv6 router
ipv6_get_dflt_router() dereferences fib without checking it and returns
fib->leaf, which can also be NULL. Its three callers then dereference the
result without checking. A missing default router (for instance on a TUN
interface with no IPv6 configuration) can thus crash pfinet.
Return NULL when fib is NULL, and guard all callers.
* pfinet/options.c (ipv6_get_dflt_router): Return NULL if fib is NULL.
(parse_interface_copy_device, parse_opt, trivfs_append_args): Guard the
router returned by ipv6_get_dflt_router().
Message-ID: <[email protected]>
-----------------------------------------------------------------------
Summary of changes:
pfinet/options.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
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Hurd
