We aren't verifying the parameter passed to the max_inline mount option, so we won't report and fail the mount if a junk value is specified for example, -o max_inline=abc. This patch converts the max_inline option to %d and checks if it's a number >= 0.
Signed-off-by: Anand Jain <anand.j...@oracle.com> --- fs/btrfs/super.c | 28 ++++++++++++---------------- 1 file changed, 12 insertions(+), 16 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 383be3609cc9..485e12657bc4 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -344,7 +344,7 @@ static const match_table_t tokens = { {Opt_datacow, "datacow"}, {Opt_nobarrier, "nobarrier"}, {Opt_barrier, "barrier"}, - {Opt_max_inline, "max_inline=%s"}, + {Opt_max_inline, "max_inline=%d"}, {Opt_alloc_start, "alloc_start=%s"}, {Opt_thread_pool, "thread_pool=%d"}, {Opt_compress, "compress"}, @@ -407,7 +407,7 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options, unsigned long new_flags) { substring_t args[MAX_OPT_ARGS]; - char *p, *num; + char *p; u64 cache_gen; int intarg; int ret = 0; @@ -604,22 +604,18 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options, } break; case Opt_max_inline: - num = match_strdup(&args[0]); - if (num) { - info->max_inline = memparse(num, NULL); - kfree(num); - - if (info->max_inline) { - info->max_inline = min_t(u64, - info->max_inline, - info->sectorsize); - } - btrfs_info(info, "max_inline at %llu", - info->max_inline); - } else { - ret = -ENOMEM; + ret = match_int(&args[0], &intarg); + if (ret) { + ret = -EINVAL; + goto out; + } else if (intarg < 0) { + btrfs_err(info, "invalid max_inline=%d\n", intarg); + ret = -EINVAL; goto out; } + info->max_inline = min_t(u64, intarg, info->sectorsize); + btrfs_info(info, "max_inline at %llu", + info->max_inline); break; case Opt_alloc_start: btrfs_info(info, -- 2.15.0 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html