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| author | Sunil Mushran <sunil.mushran@oracle.com> | 2009-09-04 22:12:01 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-09-09 07:17:52 +0400 |
| commit | 8af12fc1c2c44a6fac07e4a8b7f44ca0c6ea038a (patch) | |
| tree | 9d5950262587e0b741c734cfa7621df6ac6d2d69 | |
| parent | 2607b3b8c16b95806c81968bcd909cba02e6d051 (diff) | |
| download | linux-8af12fc1c2c44a6fac07e4a8b7f44ca0c6ea038a.tar.xz | |
ocfs2: ocfs2_write_begin_nolock() should handle len=0
commit 8379e7c46cc48f51197dd663fc6676f47f2a1e71 upstream.
Bug introduced by mainline commit e7432675f8ca868a4af365759a8d4c3779a3d922
The bug causes ocfs2_write_begin_nolock() to oops when len=0.
Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | fs/ocfs2/aops.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 50bb561860df..0f04b707f67f 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -1748,8 +1748,8 @@ int ocfs2_write_begin_nolock(struct address_space *mapping, * we know zeros will only be needed in the first and/or last cluster. */ if (clusters_to_alloc || extents_to_split || - wc->w_desc[0].c_needs_zero || - wc->w_desc[wc->w_clen - 1].c_needs_zero) + (wc->w_clen && (wc->w_desc[0].c_needs_zero || + wc->w_desc[wc->w_clen - 1].c_needs_zero))) cluster_of_pages = 1; else cluster_of_pages = 0; |