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| author | Martin Wilck <mwilck@suse.com> | 2017-11-27 23:47:35 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-08 13:03:38 +0100 |
| commit | 6ea54af90988bf869e57265723c33af623b4abec (patch) | |
| tree | 357d9ed6cf221c2cdbb7cbd619427501994c7c9c | |
| parent | 46466e23bc1bc262c28a020df982233c309ed958 (diff) | |
| download | linux-stable-6ea54af90988bf869e57265723c33af623b4abec.tar.gz linux-stable-6ea54af90988bf869e57265723c33af623b4abec.tar.bz2 linux-stable-6ea54af90988bf869e57265723c33af623b4abec.zip | |
scsi: scsi_devinfo: cleanly zero-pad devinfo strings
commit 81df022b688d43d2a3667518b2f755d384397910 upstream.
Cleanly fill memory for "vendor" and "model" with 0-bytes for the
"compatible" case rather than adding only a single 0 byte. This
simplifies the devinfo code a a bit, and avoids mistakes in other places
of the code (not in current upstream, but we had one such mistake in the
SUSE kernel).
[mkp: applied by hand and added braces]
Signed-off-by: Martin Wilck <mwilck@suse.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/scsi/scsi_devinfo.c | 22 |
1 files changed, 7 insertions, 15 deletions
diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c index ea947a7c2596..6b594bc7d94a 100644 --- a/drivers/scsi/scsi_devinfo.c +++ b/drivers/scsi/scsi_devinfo.c @@ -34,7 +34,6 @@ struct scsi_dev_info_list_table { }; -static const char spaces[] = " "; /* 16 of them */ static unsigned scsi_default_dev_flags; static LIST_HEAD(scsi_dev_info_list); static char scsi_dev_flags[256]; @@ -296,20 +295,13 @@ static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length, size_t from_length; from_length = strlen(from); - strncpy(to, from, min(to_length, from_length)); - if (from_length < to_length) { - if (compatible) { - /* - * NUL terminate the string if it is short. - */ - to[from_length] = '\0'; - } else { - /* - * space pad the string if it is short. - */ - strncpy(&to[from_length], spaces, - to_length - from_length); - } + /* this zero-pads the destination */ + strncpy(to, from, to_length); + if (from_length < to_length && !compatible) { + /* + * space pad the string if it is short. + */ + memset(&to[from_length], ' ', to_length - from_length); } if (from_length > to_length) printk(KERN_WARNING "%s: %s string '%s' is too long\n", |