diff options
| author | Miklos Szeredi <mszeredi@redhat.com> | 2020-02-03 11:41:53 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-11 04:33:50 -0800 |
| commit | 4f98fe43cdaaeced34c2e6f6d1b76ed0d712bd2a (patch) | |
| tree | 6e12c0ab2423f0d320854037c75d04de5cb73753 | |
| parent | 41be0c3295e23374882aa53b651a00515c4a032d (diff) | |
ovl: fix lseek overflow on 32bit
[ Upstream commit a4ac9d45c0cd14a2adc872186431c79804b77dbf ]
ovl_lseek() is using ssize_t to return the value from vfs_llseek(). On a
32-bit kernel ssize_t is a 32-bit signed int, which overflows above 2 GB.
Assign the return value of vfs_llseek() to loff_t to fix this.
Reported-by: Boris Gjenero <boris.gjenero@gmail.com>
Fixes: 9e46b840c705 ("ovl: support stacked SEEK_HOLE/SEEK_DATA")
Cc: <stable@vger.kernel.org> # v4.19
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | fs/overlayfs/file.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index 0bd276e4ccbe..fa5ac5de807c 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -149,7 +149,7 @@ static loff_t ovl_llseek(struct file *file, loff_t offset, int whence) struct inode *inode = file_inode(file); struct fd real; const struct cred *old_cred; - ssize_t ret; + loff_t ret; /* * The two special cases below do not need to involve real fs, |