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authorJann Horn <jannh@google.com>2018-10-30 23:06:38 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2018-10-31 16:54:14 +0100
commitb10298d56c9623f9b173f19959732d3184b35f4f (patch)
treef0c80f0465a7b15e66d11747c2e7aefd898c486f /fs/reiserfs/xattr.c
parentfs/hfs/extent.c: fix array out of bounds read of array extent (diff)
downloadlinux-b10298d56c9623f9b173f19959732d3184b35f4f.tar.xz
linux-b10298d56c9623f9b173f19959732d3184b35f4f.zip
reiserfs: propagate errors from fill_with_dentries() properly
fill_with_dentries() failed to propagate errors up to reiserfs_for_each_xattr() properly. Plumb them through. Note that reiserfs_for_each_xattr() is only used by reiserfs_delete_xattrs() and reiserfs_chown_xattrs(). The result of reiserfs_delete_xattrs() is discarded anyway, the only difference there is whether a warning is printed to dmesg. The result of reiserfs_chown_xattrs() does matter because it can block chowning of the file to which the xattrs belong; but either way, the resulting state can have misaligned ownership, so my patch doesn't improve things greatly. Credit for making me look at this code goes to Al Viro, who pointed out that the ->actor calling convention is suboptimal and should be changed. Link: http://lkml.kernel.org/r/20180802163335.83312-1-jannh@google.com Signed-off-by: Jann Horn <jannh@google.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Jeff Mahoney <jeffm@suse.com> Cc: Eric Biggers <ebiggers@google.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/reiserfs/xattr.c')
-rw-r--r--fs/reiserfs/xattr.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 48cdfc81fe10..32d8986c26fb 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -185,6 +185,7 @@ struct reiserfs_dentry_buf {
struct dir_context ctx;
struct dentry *xadir;
int count;
+ int err;
struct dentry *dentries[8];
};
@@ -207,6 +208,7 @@ fill_with_dentries(struct dir_context *ctx, const char *name, int namelen,
dentry = lookup_one_len(name, dbuf->xadir, namelen);
if (IS_ERR(dentry)) {
+ dbuf->err = PTR_ERR(dentry);
return PTR_ERR(dentry);
} else if (d_really_is_negative(dentry)) {
/* A directory entry exists, but no file? */
@@ -215,6 +217,7 @@ fill_with_dentries(struct dir_context *ctx, const char *name, int namelen,
"not found for file %pd.\n",
dentry, dbuf->xadir);
dput(dentry);
+ dbuf->err = -EIO;
return -EIO;
}
@@ -262,6 +265,10 @@ static int reiserfs_for_each_xattr(struct inode *inode,
err = reiserfs_readdir_inode(d_inode(dir), &buf.ctx);
if (err)
break;
+ if (buf.err) {
+ err = buf.err;
+ break;
+ }
if (!buf.count)
break;
for (i = 0; !err && i < buf.count && buf.dentries[i]; i++) {