diff options
| author | Stanislav Fomichev <sdf.kernel@gmail.com> | 2026-07-27 09:19:54 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-08-03 16:43:53 -0700 |
| commit | 1bb30b181d9f0484e141f8411e15ed906d5c6780 (patch) | |
| tree | 93c1e88698b03dd0ec613128d562f2d51d2cffe6 /include | |
| parent | d5c5ecea1fb4ed0c32d639c023a64e906e038bc3 (diff) | |
xsk: require at least 16 bytes of TX metadata
AF_XDP accepts a TX metadata length as small as eight bytes, but every
supported request needs the flags plus at least one eight-byte request
field. Such short metadata also lets the kernel read beyond the registered
area.
Require 16 bytes rather than sizeof(struct xsk_tx_metadata) to preserve
compatibility with applications that do not use launch-time metadata.
Fixes: 341ac980eab9 ("xsk: Support tx_metadata_len")
Reported-by: AutonomousCodeSecurity@microsoft.com
Reported-by: Cen Zhang (Microsoft) <blbllhy@gmail.com>
Link: https://lore.kernel.org/netdev/20260720155210.34229-1-blbllhy@gmail.com/
Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20260727161959.885642-2-sdf@fomichev.me
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions