tree bf25221c25731b147937ae58efdf15c54be3e19a
parent 15bc77f94e9f0e3cfd6972f3b84bb7aaa4c36b1b
author Ross Lagerwall <ross.lagerwall@citrix.com> 1546972256 +0000
committer Steve French <stfrench@microsoft.com> 1547212480 -0600

cifs: Limit memory used by lock request calls to a page

The code tries to allocate a contiguous buffer with a size supplied by
the server (maxBuf). This could fail if memory is fragmented since it
results in high order allocations for commonly used server
implementations. It is also wasteful since there are probably
few locks in the usual case. Limit the buffer to be no larger than a
page to avoid memory allocation failures due to fragmentation.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: Steve French <stfrench@microsoft.com>