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Fix potential name buffer overflows in redirector

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The state buffers used by the following structs in chansrv_fuse.c
are one byte too small for filenames of length XFS_MAXFILENAMELEN:-
- struct state_lookup
- struct state_create
- struct state_rename

In practice, there is no runtime danger, as XFS_MAXFILENAMELEN is 255,
and these buffers will be followed by non-byte aligned data. Nevertheless
this should be fixed to prevent problems if the value is changed.
This commit is contained in:
matt335672 2024-07-22 14:35:18 +01:00
parent 4bfeb668e1
commit c9e84dc16c
1 changed files with 3 additions and 3 deletions
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6
sesman/chansrv/chansrv_fuse.c
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@ -202,7 +202,7 @@ struct state_lookup
{
fuse_req_t req; /* Original FUSE request from lookup */
fuse_ino_t pinum; /* inum of parent directory */
char name[XFS_MAXFILENAMELEN];
char name[XFS_MAXFILENAMELEN + 1];
/* Name to look up */
fuse_ino_t existing_inum;
/* inum of an existing entry */
@ -241,7 +241,7 @@ struct state_create
fuse_req_t req; /* Original FUSE request from lookup */
struct fuse_file_info fi; /* File info struct passed to open */
fuse_ino_t pinum; /* inum of parent directory */
char name[XFS_MAXFILENAMELEN];
char name[XFS_MAXFILENAMELEN + 1];
/* Name of file in parent directory */
mode_t mode; /* Mode of file to create */
};
@ -280,7 +280,7 @@ struct state_rename
fuse_req_t req; /* Original FUSE request from lookup */
fuse_ino_t pinum; /* inum of parent of file */
fuse_ino_t new_pinum; /* inum of new parent of file */
char name[XFS_MAXFILENAMELEN];
char name[XFS_MAXFILENAMELEN + 1];
/* New name of file in new parent dir */
};