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| author | Vasiliy Kulikov <segooon@gmail.com> | 2010-10-28 02:34:22 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-28 05:03:14 +0400 |
| commit | ed77ed6112f2d4b650f4be7dbaf14e06e1d393a5 (patch) | |
| tree | 506f67a21101c4b26007057b2d83e245ff61fd46 /drivers/char/synclink_gt.c | |
| parent | b9b1134260e036fb75c468514569864dd6722f3e (diff) | |
| download | linux-ed77ed6112f2d4b650f4be7dbaf14e06e1d393a5.tar.xz | |
drivers/char/synclink_gt.c: fix information leak to userland
Structures tmp_params and new_line are copied to userland with some
padding fields unitialized. It leads to leaking of stack memory.
Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Acked-by: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/synclink_gt.c')
| -rw-r--r-- | drivers/char/synclink_gt.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c index 11999784383e..9f7fc71474b4 100644 --- a/drivers/char/synclink_gt.c +++ b/drivers/char/synclink_gt.c @@ -1132,6 +1132,7 @@ static long get_params32(struct slgt_info *info, struct MGSL_PARAMS32 __user *us struct MGSL_PARAMS32 tmp_params; DBGINFO(("%s get_params32\n", info->device_name)); + memset(&tmp_params, 0, sizeof(tmp_params)); tmp_params.mode = (compat_ulong_t)info->params.mode; tmp_params.loopback = info->params.loopback; tmp_params.flags = info->params.flags; @@ -1617,6 +1618,8 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) if (cmd != SIOCWANDEV) return hdlc_ioctl(dev, ifr, cmd); + memset(&new_line, 0, sizeof(new_line)); + switch(ifr->ifr_settings.type) { case IF_GET_IFACE: /* return current sync_serial_settings */ |