Currently we limit values of time_offset mount option to be between -12 and 12 hours. However e.g. zone GMT+12 can have a DST correction on top which makes the total time difference 13 hours. Update the checks in mount option parsing to allow offset of upto 13 hours. Reported-by: Volker Kuhlmann <list0570@xxxxxxxxxxxxxxx> Signed-off-by: Jan Kara <jack@xxxxxxx> --- fs/fat/inode.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/fat/inode.c b/fs/fat/inode.c index 509411dd3698..2041031ab1c8 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -1146,7 +1146,11 @@ static int parse_options(struct super_block *sb, char *options, int is_vfat, case Opt_time_offset: if (match_int(&args[0], &option)) return -EINVAL; - if (option < -12 * 60 || option > 12 * 60) + /* + * Allow for GMT+-12 zones to have DST like + * corrections + */ + if (option < -13 * 60 || option > 13 * 60) return -EINVAL; opts->tz_set = 1; opts->time_offset = option; -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
