tree 7daa21454af6e1a533b6bfc4ba9015b09612b8e6
parent 8b65bb57d87a66cd156f856f28f2bd72d7b2395e
author Liping Zhang <zlpnobody@gmail.com> 1491580267 +0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1491672460 -0700

sysctl: report EINVAL if value is larger than UINT_MAX for proc_douintvec

Currently, inputting the following command will succeed but actually the
value will be truncated:

  # echo 0x12ffffffff > /proc/sys/net/ipv4/tcp_notsent_lowat

This is not friendly to the user, so instead, we should report error
when the value is larger than UINT_MAX.

Fixes: e7d316a02f68 ("sysctl: handle error writing UINT_MAX to u32 fields")
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Cc: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>