fat: allow time_offset to be up to 24 hours

[linux.git] / fs / fat / inode.c

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 6aece96df19fcebdda5ed3f036205bbaeddc65a6..3ac9078fde65f87ef3b434d21af0cb78211f3953 100644 (file)
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -1146,7 +1146,12 @@ 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)
+                       /*
+                        * GMT+-12 zones may have DST corrections so at least
+                        * 13 hours difference is needed. Make the limit 24
+                        * just in case someone invents something unusual.
+                        */
+                       if (option < -24 * 60 || option > 24 * 60)
                                return -EINVAL;
                        opts->tz_set = 1;
                        opts->time_offset = option;