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| author | Ingo Molnar | 2017-06-24 08:57:20 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2017-06-24 08:57:20 +0200 |
| commit | 1bc3cd4dfa9f2f5385ee15de2301d25e51cf43f0 (patch) | |
| tree | cd38acbcaeea1520a598cf8978002a07c2a5993b /net/core/dev_ioctl.c | |
| parent | sched/rt: Move RT related code from sched/core.c to sched/rt.c (diff) | |
| parent | Merge tag 'powerpc-4.12-7' of git://git.kernel.org/pub/scm/linux/kernel/git/p... (diff) | |
| download | kernel-qcow2-linux-1bc3cd4dfa9f2f5385ee15de2301d25e51cf43f0.tar.gz kernel-qcow2-linux-1bc3cd4dfa9f2f5385ee15de2301d25e51cf43f0.tar.xz kernel-qcow2-linux-1bc3cd4dfa9f2f5385ee15de2301d25e51cf43f0.zip | |
Merge branch 'linus' into sched/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'net/core/dev_ioctl.c')
| -rw-r--r-- | net/core/dev_ioctl.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c index b94b1d293506..27fad31784a8 100644 --- a/net/core/dev_ioctl.c +++ b/net/core/dev_ioctl.c @@ -410,6 +410,22 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg) if (cmd == SIOCGIFNAME) return dev_ifname(net, (struct ifreq __user *)arg); + /* + * Take care of Wireless Extensions. Unfortunately struct iwreq + * isn't a proper subset of struct ifreq (it's 8 byte shorter) + * so we need to treat it specially, otherwise applications may + * fault if the struct they're passing happens to land at the + * end of a mapped page. + */ + if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { + struct iwreq iwr; + + if (copy_from_user(&iwr, arg, sizeof(iwr))) + return -EFAULT; + + return wext_handle_ioctl(net, &iwr, cmd, arg); + } + if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) return -EFAULT; @@ -559,9 +575,6 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg) ret = -EFAULT; return ret; } - /* Take care of Wireless Extensions */ - if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) - return wext_handle_ioctl(net, &ifr, cmd, arg); return -ENOTTY; } } |