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Message-ID: <20130430045920.296280@gmx.com> Date: Tue, 30 Apr 2013 00:59:19 -0400 From: "Jon ERNST" <jonernst@....com> To: linux-ext4@...r.kernel.org Subject: [ext4] extent tree es_len can be zero? Hi ,list, extent tree es_len can be zero? if we call ext4_es_end when es_len is zero, it will have problem. diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c index 95796a1..49a8da2 100644 --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -108,7 +108,7 @@ * tree are ordered by logical block no. * * -- operations on a extent status tree - * There are three important operations on a delayed extent tree: find + * There are three important operations on a delayed extent tree: finding * next extent, adding a extent(a range of blocks) and removing a extent. * * -- race on a extent status tree @@ -195,7 +195,7 @@ static void ext4_es_print_tree(struct inode *inode) static inline ext4_lblk_t ext4_es_end(struct extent_status *es) { - BUG_ON(es->es_lblk + es->es_len < es->es_lblk); + BUG_ON(es->es_lblk + es->es_len <= es->es_lblk); return es->es_lblk + es->es_len - 1; } -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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