From f639d9867eea647005dc824e0e24f39ffc50d4e4 Mon Sep 17 00:00:00 2001 From: Xiubo Li Date: Sat, 5 Mar 2022 19:52:59 +0800 Subject: ceph: fix memory leak in ceph_readdir when note_last_dentry returns error Reset the last_readdir at the same time, and add a comment explaining why we don't free last_readdir when dir_emit returns false. Signed-off-by: Xiubo Li Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov --- fs/ceph/dir.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'fs/ceph/dir.c') diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 0cf6afe283e9..eae417d71136 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -478,8 +478,11 @@ more: 2 : (fpos_off(rde->offset) + 1); err = note_last_dentry(dfi, rde->name, rde->name_len, next_offset); - if (err) + if (err) { + ceph_mdsc_put_request(dfi->last_readdir); + dfi->last_readdir = NULL; return err; + } } else if (req->r_reply_info.dir_end) { dfi->next_offset = 2; /* keep last name */ @@ -520,6 +523,12 @@ more: if (!dir_emit(ctx, rde->name, rde->name_len, ceph_present_ino(inode->i_sb, le64_to_cpu(rde->inode.in->ino)), le32_to_cpu(rde->inode.in->mode) >> 12)) { + /* + * NOTE: Here no need to put the 'dfi->last_readdir', + * because when dir_emit stops us it's most likely + * doesn't have enough memory, etc. So for next readdir + * it will continue. + */ dout("filldir stopping us...\n"); return 0; } -- cgit v1.2.3