From: Namjae Jeon linkinjeon@kernel.org
commit f26967b9f7a830e228bb13fb41bd516ddd9d789d upstream.
log_read_rst() returns ENOMEM error when there is not enough memory. In this case, if info is returned without initialization, it attempts to kfree the uninitialized info->r_page pointer. This patch moves the memset initialization code to before log_read_rst() is called.
Reported-by: Gerald Lee sundaywind2004@gmail.com Signed-off-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Konstantin Komarov almaz.alexandrovich@paragon-software.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ntfs3/fslog.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- a/fs/ntfs3/fslog.c +++ b/fs/ntfs3/fslog.c @@ -1185,8 +1185,6 @@ static int log_read_rst(struct ntfs_log if (!r_page) return -ENOMEM;
- memset(info, 0, sizeof(struct restart_info)); - /* Determine which restart area we are looking for. */ if (first) { vbo = 0; @@ -3791,10 +3789,11 @@ int log_replay(struct ntfs_inode *ni, bo if (!log) return -ENOMEM;
+ memset(&rst_info, 0, sizeof(struct restart_info)); + log->ni = ni; log->l_size = l_size; log->one_page_buf = kmalloc(page_size, GFP_NOFS); - if (!log->one_page_buf) { err = -ENOMEM; goto out; @@ -3842,6 +3841,7 @@ int log_replay(struct ntfs_inode *ni, bo if (rst_info.vbo) goto check_restart_area;
+ memset(&rst_info2, 0, sizeof(struct restart_info)); err = log_read_rst(log, l_size, false, &rst_info2);
/* Determine which restart area to use. */