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| author | Ronnie Sahlberg <lsahlber@redhat.com> | 2021-05-19 08:40:11 +1000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-26 11:48:32 +0200 |
| commit | 4e95d8160aa7eaaa185b8c1d16294d9e79444aeb (patch) | |
| tree | 1732c2b1603d7074f2c0b24d60e26d7eeab8e117 /fs/cifs | |
| parent | b31395e0d19017aaa83ee0e2dc0862954aca3aa3 (diff) | |
| download | linux-stable-4e95d8160aa7eaaa185b8c1d16294d9e79444aeb.tar.gz linux-stable-4e95d8160aa7eaaa185b8c1d16294d9e79444aeb.tar.bz2 linux-stable-4e95d8160aa7eaaa185b8c1d16294d9e79444aeb.zip | |
cifs: fix memory leak in smb2_copychunk_range
commit d201d7631ca170b038e7f8921120d05eec70d7c5 upstream.
When using smb2_copychunk_range() for large ranges we will
run through several iterations of a loop calling SMB2_ioctl()
but never actually free the returned buffer except for the final
iteration.
This leads to memory leaks everytime a large copychunk is requested.
Fixes: 9bf0c9cd4314 ("CIFS: Fix SMB2/SMB3 Copy offload support (refcopy) for large files")
Cc: <stable@vger.kernel.org>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/smb2ops.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 9d94abaff8fc..5a14f518cd97 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -1174,6 +1174,8 @@ smb2_copychunk_range(const unsigned int xid, cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk)); /* Request server copy to target from src identified by key */ + kfree(retbuf); + retbuf = NULL; rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, true /* is_fsctl */, (char *)pcchunk, |