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| author |   Eric Dumazet <edumazet@google.com> | 2017-08-16 11:09:12 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-08-16 16:28:47 -0700 |
| commit | c780a049f9bf442314335372c9abc4548bfe3e44 (patch) | |
| tree | 9bfe8c76f75ea6d1dbc52efa95ff294d80d58c8a /Documentation/sysctl | |
| parent | ptr_ring: use kmalloc_array() (diff) | |
| download | linux-dev-c780a049f9bf442314335372c9abc4548bfe3e44.tar.xz linux-dev-c780a049f9bf442314335372c9abc4548bfe3e44.zip | |
ipv4: better IP_MAX_MTU enforcement
While working on yet another syzkaller report, I found
that our IP_MAX_MTU enforcements were not properly done.
gcc seems to reload dev->mtu for min(dev->mtu, IP_MAX_MTU), and
final result can be bigger than IP_MAX_MTU :/
This is a problem because device mtu can be changed on other cpus or
threads.
While this patch does not fix the issue I am working on, it is
probably worth addressing it.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/sysctl')
0 files changed, 0 insertions, 0 deletions