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ceph: Use strscpy() instead of strcpy() in __get_snap_name()

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strcpy() performs no bounds checking on the destination buffer. This
could result in linear overflows beyond the end of the buffer, leading
to all kinds of misbehaviors [1].

This fixes checkpatch warning:
    WARNING: Prefer strscpy over strcpy

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy

[ idryomov: formatting ]

Signed-off-by: Abdul Rahim <abdul.rahim@myyahoo.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Abdul Rahim 2024-11-15 16:54:19 +05:30 committed by Ilya Dryomov
parent e50f960bea
commit c152737be2
1 changed files with 7 additions and 1 deletions
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8
fs/ceph/export.c
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@ -452,7 +452,13 @@ static int __get_snap_name(struct dentry *parent, char *name,
goto out;
if (ceph_snap(inode) == CEPH_SNAPDIR) {
if (ceph_snap(dir) == CEPH_NOSNAP) {
strcpy(name, fsc->mount_options->snapdir_name);
/*
* .get_name() from struct export_operations
* assumes that its 'name' parameter is pointing
* to a NAME_MAX+1 sized buffer
*/
strscpy(name, fsc->mount_options->snapdir_name,
NAME_MAX + 1);
err = 0;
}
goto out;