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authorMiklos Szeredi <mszeredi@redhat.com>2020-02-03 11:41:53 +0100
committerMiklos Szeredi <mszeredi@redhat.com>2020-02-03 11:41:53 +0100
commita4ac9d45c0cd14a2adc872186431c79804b77dbf (patch)
treec37419075e0c8749613de0955bf8678b9ff342fa /fs
parentovl: add splice file read write helper (diff)
downloadlinux-dev-a4ac9d45c0cd14a2adc872186431c79804b77dbf.tar.xz
linux-dev-a4ac9d45c0cd14a2adc872186431c79804b77dbf.zip
ovl: fix lseek overflow on 32bit
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>
Diffstat (limited to 'fs')
-rw-r--r--fs/overlayfs/file.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c
index 67ef4c8cfdc7..a5317216de73 100644
--- a/fs/overlayfs/file.c
+++ b/fs/overlayfs/file.c
@@ -157,7 +157,7 @@ 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,