From: David Howells Date: Tue, 19 Aug 2025 15:27:36 +0000 (+0100) Subject: cifs: Fix oops due to uninitialised variable X-Git-Tag: v6.17-rc3~22^2 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=453a6d2a68e54a483d67233c6e1e24c4095ee4be;p=users%2Fgriffoul%2Flinux.git cifs: Fix oops due to uninitialised variable Fix smb3_init_transform_rq() to initialise buffer to NULL before calling netfs_alloc_folioq_buffer() as netfs assumes it can append to the buffer it is given. Setting it to NULL means it should start a fresh buffer, but the value is currently undefined. Fixes: a2906d3316fc ("cifs: Switch crypto buffer to use a folio_queue rather than an xarray") Signed-off-by: David Howells cc: Steve French cc: Paulo Alcantara cc: linux-cifs@vger.kernel.org cc: linux-fsdevel@vger.kernel.org Signed-off-by: Steve French --- diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index 3b251de874ec..94b1d7a395d5 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -4496,7 +4496,7 @@ smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, for (int i = 1; i < num_rqst; i++) { struct smb_rqst *old = &old_rq[i - 1]; struct smb_rqst *new = &new_rq[i]; - struct folio_queue *buffer; + struct folio_queue *buffer = NULL; size_t size = iov_iter_count(&old->rq_iter); orig_len += smb_rqst_len(server, old);