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authorKulikov Vasiliy <segooon@gmail.com>2010-08-10 18:02:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 08:59:06 -0700
commit89596f20bb5f0f32c37abd337d995080e04519c8 (patch)
treea4e0c01a5c8fa779229c6277aa7f836a1c09f2cf /drivers/message
parentd929dc2bfd8a58c34f1df0680018fa8ea5caa907 (diff)
downloadlinux-2.6.38-lt-ux500-89596f20bb5f0f32c37abd337d995080e04519c8.tar.gz
i2o: check return code from put_user()
Check return value of put_user() and return -EFAULT if it failed. Original comment "We did a get user...so assuming mem is ok...is this bad?" is incorrect because memory can be read only. Signed-off-by: Kulikov Vasiliy <segooon@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/message')
-rw-r--r--drivers/message/i2o/i2o_config.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/message/i2o/i2o_config.c b/drivers/message/i2o/i2o_config.c
index 4dd39a03082..068ba0785bb 100644
--- a/drivers/message/i2o/i2o_config.c
+++ b/drivers/message/i2o/i2o_config.c
@@ -111,9 +111,9 @@ static int i2o_cfg_gethrt(unsigned long arg)
len = 8 + ((hrt->entry_len * hrt->num_entries) << 2);
- /* We did a get user...so assuming mem is ok...is this bad? */
- put_user(len, kcmd.reslen);
- if (len > reslen)
+ if (put_user(len, kcmd.reslen))
+ ret = -EFAULT;
+ else if (len > reslen)
ret = -ENOBUFS;
else if (copy_to_user(kcmd.resbuf, (void *)hrt, len))
ret = -EFAULT;
@@ -147,8 +147,9 @@ static int i2o_cfg_getlct(unsigned long arg)
lct = (i2o_lct *) c->lct;
len = (unsigned int)lct->table_size << 2;
- put_user(len, kcmd.reslen);
- if (len > reslen)
+ if (put_user(len, kcmd.reslen))
+ ret = -EFAULT;
+ else if (len > reslen)
ret = -ENOBUFS;
else if (copy_to_user(kcmd.resbuf, lct, len))
ret = -EFAULT;
@@ -208,8 +209,9 @@ static int i2o_cfg_parms(unsigned long arg, unsigned int type)
return -EAGAIN;
}
- put_user(len, kcmd.reslen);
- if (len > reslen)
+ if (put_user(len, kcmd.reslen))
+ ret = -EFAULT;
+ else if (len > reslen)
ret = -ENOBUFS;
else if (copy_to_user(kcmd.resbuf, res, len))
ret = -EFAULT;