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xattr: use checked_mul to increase size 

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller 2020-04-24 09:58:15 +02:00
parent 00ec8d1685
commit 9af76ef075
1 changed files with 2 additions and 4 deletions
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6
src/tools/xattr.rs
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@ -22,8 +22,7 @@ pub fn flistxattr(fd: RawFd) -> Result<Vec<u8>, nix::errno::Errno> {
match err { match err {
Errno::ERANGE => { Errno::ERANGE => {
// Buffer was not big enough to fit the list, retry with double the size // Buffer was not big enough to fit the list, retry with double the size
if size * 2 < size { return Err(Errno::ENOMEM); } size = size.checked_mul(2).ok_or(Errno::ENOMEM)?;
size *= 2;
}, },
_ => return Err(err), _ => return Err(err),
} }
@ -49,8 +48,7 @@ pub fn fgetxattr(fd: RawFd, name: &[u8]) -> Result<Vec<u8>, nix::errno::Errno> {
match err { match err {
Errno::ERANGE => { Errno::ERANGE => {
// Buffer was not big enough to fit the value, retry with double the size // Buffer was not big enough to fit the value, retry with double the size
if size * 2 < size { return Err(Errno::ENOMEM); } size = size.checked_mul(2).ok_or(Errno::ENOMEM)?;
size *= 2;
}, },
_ => return Err(err), _ => return Err(err),
} }