From: Andrew Price Date: Fri, 12 Oct 2012 15:45:09 +0000 (+0100) Subject: GFS2: Fix possible null pointer deref in gfs2_rs_alloc X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cd0ed19fb614cb1315c0a510ec6c163d8324fd82;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git GFS2: Fix possible null pointer deref in gfs2_rs_alloc Despite the return value from kmem_cache_zalloc() being checked, the error wasn't being returned until after a possible null pointer dereference. This patch returns the error immediately, allowing the removal of the error variable. Signed-off-by: Andrew Price Signed-off-by: Steven Whitehouse --- diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 3cc402ce6fe..43d1a20bdbe 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -553,7 +553,6 @@ void gfs2_free_clones(struct gfs2_rgrpd *rgd) */ int gfs2_rs_alloc(struct gfs2_inode *ip) { - int error = 0; struct gfs2_blkreserv *res; if (ip->i_res) @@ -561,7 +560,7 @@ int gfs2_rs_alloc(struct gfs2_inode *ip) res = kmem_cache_zalloc(gfs2_rsrv_cachep, GFP_NOFS); if (!res) - error = -ENOMEM; + return -ENOMEM; RB_CLEAR_NODE(&res->rs_node); @@ -571,7 +570,7 @@ int gfs2_rs_alloc(struct gfs2_inode *ip) else ip->i_res = res; up_write(&ip->i_rw_mutex); - return error; + return 0; } static void dump_rs(struct seq_file *seq, const struct gfs2_blkreserv *rs)