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authorAkinobu Mita <akinobu.mita@gmail.com>2011-07-19 08:49:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-19 22:09:30 -0700
commitf7b88631a89757d70192044c9d9f2e8d2fc02f2c (patch)
tree51da597d7625d2428701be146f233cee047425d9
parente501f29c727dea74e2124c584cbab5fa805d489b (diff)
downloadlinux-linaro-stable-f7b88631a89757d70192044c9d9f2e8d2fc02f2c.tar.gz
fs/libfs.c: fix simple_attr_write() on 32bit machines
Assume that /sys/kernel/debug/dummy64 is debugfs file created by debugfs_create_x64(). # cd /sys/kernel/debug # echo 0x1234567812345678 > dummy64 # cat dummy64 0x0000000012345678 # echo 0x80000000 > dummy64 # cat dummy64 0xffffffff80000000 A value larger than INT_MAX cannot be written to the debugfs file created by debugfs_create_u64 or debugfs_create_x64 on 32bit machine. Because simple_attr_write() uses simple_strtol() for the conversion. To fix this, use simple_strtoll() instead. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/libfs.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/libfs.c b/fs/libfs.c
index c88eab55aec9..275ca4749a2e 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -822,7 +822,7 @@ ssize_t simple_attr_write(struct file *file, const char __user *buf,
goto out;
attr->set_buf[size] = '\0';
- val = simple_strtol(attr->set_buf, NULL, 0);
+ val = simple_strtoll(attr->set_buf, NULL, 0);
ret = attr->set(attr->data, val);
if (ret == 0)
ret = len; /* on success, claim we got the whole input */