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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2015-12-21 10:55:45 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-12-22 17:00:58 -0500 |
| commit | 5449a5ca9bc27dd51a462de7ca0b1cd861cd2bd0 (patch) | |
| tree | d45c413133a77f12c74950961286367daca26a61 /net | |
| parent | 024f35c55233fb6041e2b31165271f5b941802e6 (diff) | |
| download | linux-5449a5ca9bc27dd51a462de7ca0b1cd861cd2bd0.tar.gz linux-5449a5ca9bc27dd51a462de7ca0b1cd861cd2bd0.tar.bz2 linux-5449a5ca9bc27dd51a462de7ca0b1cd861cd2bd0.zip | |
addrconf: always initialize sysctl table data
When sysctl performs restrict writes, it allows to write from
a middle position of a sysctl file, which requires us to initialize
the table data before calling proc_dostring() for the write case.
Fixes: 3d1bec99320d ("ipv6: introduce secret_stable to ipv6_devconf")
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Tested-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/addrconf.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 17f8e7ea133b..1f21087accab 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -5369,13 +5369,10 @@ static int addrconf_sysctl_stable_secret(struct ctl_table *ctl, int write, goto out; } - if (!write) { - err = snprintf(str, sizeof(str), "%pI6", - &secret->secret); - if (err >= sizeof(str)) { - err = -EIO; - goto out; - } + err = snprintf(str, sizeof(str), "%pI6", &secret->secret); + if (err >= sizeof(str)) { + err = -EIO; + goto out; } err = proc_dostring(&lctl, write, buffer, lenp, ppos); |