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ovl: fix lseek overflow on 32bit
commit a4ac9d45c0cd14a2adc872186431c79804b77dbf upstream.
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: 9e46b840c7
("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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -146,7 +146,7 @@ static loff_t ovl_llseek(struct file *file, loff_t offset, int whence)
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struct inode *inode = file_inode(file);
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struct fd real;
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const struct cred *old_cred;
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ssize_t ret;
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loff_t ret;
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/*
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* The two special cases below do not need to involve real fs,
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