Suhas Athani has uploaded this change for review. ( https://review.gerrithub.io/c/ffilz/nfs-ganesha/+/1243948?usp=email ) Change subject: Normalize IPv4 addresses in hash_sockaddr() to match IPv4-mapped IPv6 form ...................................................................... Normalize IPv4 addresses in hash_sockaddr() to match IPv4-mapped IPv6 form `hash_sockaddr()` produces different hashes for the same IPv4 address depending on whether it's stored as `AF_INET` or IPv4-mapped IPv6 (`::ffff:a.b.c.d`). This breaks consistency in the client_mgr cache: NFS inserts using the mapped form, but RemoveClient clears using the plain IPv4 form, leaving a stale pointer after free. Problem: - `sockaddr_cmp()` treats both forms as equal (canonicalization on compare) - `hash_sockaddr()` did not normalize them the same way on little-endian hosts - RemoveClient cache invalidation misses, leaving freed entry accessible - Subsequent remount hits stale cache → use-after-free or crash in `sockaddr_cmp()` Solution: 1. Normalize `AF_INET` to IPv4-mapped IPv6 before hashing in `hash_sockaddr()` so both forms produce the same hash. 2. Use the stored client address hash in `remove_gsh_client()` for cache invalidation (defensive; now redundant but future-proof). Change-Id: Ibf2d8a5fc1a81b3ef48551c895e7af2c4d173897 Signed-off-by: Suhas Athani <Suhas.Athani(a)ibm.com&gt; --- M src/support/client_mgr.c M src/support/ip_utils.c 2 files changed, 20 insertions(+), 11 deletions(-) git pull ssh://review.gerrithub.io:29418/ffilz/nfs-ganesha refs/changes/48/1243948/1 -- To view, visit https://review.gerrithub.io/c/ffilz/nfs-ganesha/+/1243948?usp=email To unsubscribe, or for help writing mail filters, visit https://review.gerrithub.io/settings?usp=email Gerrit-MessageType: newchange Gerrit-Project: ffilz/nfs-ganesha Gerrit-Branch: next Gerrit-Change-Id: Ibf2d8a5fc1a81b3ef48551c895e7af2c4d173897 Gerrit-Change-Number: 1243948 Gerrit-PatchSet: 1 Gerrit-Owner: Suhas Athani <Suhas.Athani(a)ibm.com&gt;