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| author | Xiubo Li <xiubli@redhat.com> | 2022-03-05 12:52:59 +0100 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2022-03-21 13:35:16 +0100 |
| commit | f639d9867eea647005dc824e0e24f39ffc50d4e4 (patch) | |
| tree | c923feb0c6db4003bf13d38e713db1bb8fee0a30 | |
| parent | ceph: uninitialized variable in debug output (diff) | |
| download | linux-f639d9867eea647005dc824e0e24f39ffc50d4e4.tar.xz linux-f639d9867eea647005dc824e0e24f39ffc50d4e4.zip | |
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 <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| -rw-r--r-- | fs/ceph/dir.c | 11 |
1 files changed, 10 insertions, 1 deletions
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; } |