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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-10-10 07:03:55 (GMT)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-10-14 17:07:19 (GMT)
commitd723a92dd465d549bf79dd481c09d59f0be02936 (patch)
tree70a30da992a8d620b4a2efec65cc94f07906b425 /fs/sysfs
parent785a162d147a547bc7a577c1c28f6fb9dbeb4f16 (diff)
downloadlinux-d723a92dd465d549bf79dd481c09d59f0be02936.tar.xz
sysfs/bin: Fix size handling overflow for bin_attribute
While looking at the code, I noticed that bin_attribute read() and write() ops copy the inode size into an int for futher comparisons. Some bin_attributes can be fairly large. For example, pci creates some for BARs set to the BAR size and giant BARs are around the corner, so this is going to break something somewhere eventually. Let's use the right type. [adjust for seqfile conversions, only needed for bin_read() - gkh] Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/sysfs')
-rw-r--r--fs/sysfs/file.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index c324ee9..5d818df 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -156,7 +156,7 @@ static ssize_t sysfs_bin_read(struct file *file, char __user *userbuf,
struct sysfs_open_file *of = sysfs_of(file);
struct bin_attribute *battr = of->sd->s_bin_attr.bin_attr;
struct kobject *kobj = of->sd->s_parent->s_dir.kobj;
- int size = file_inode(file)->i_size;
+ loff_t size = file_inode(file)->i_size;
int count = min_t(size_t, bytes, PAGE_SIZE);
loff_t offs = *off;
char *buf;