From: Dan Carpenter dan.carpenter@oracle.com
[ Upstream commit e946d3c887a9dc33aa82a349c6284f4a084163f4 ]
The problem is the mismatched types between "ctx->total_len" which is an unsigned int, "rc" which is an int, and "ctx->rc" which is a ssize_t. The code does:
ctx->rc = (rc == 0) ? ctx->total_len : rc;
We want "ctx->rc" to store the negative "rc" error code. But what happens is that "rc" is type promoted to a high unsigned int and 'ctx->rc" will store the high positive value instead of a negative value.
The fix is to change "rc" from an int to a ssize_t.
Fixes: c610c4b619e5 ("CIFS: Add asynchronous write support through kernel AIO") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/cifs/file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/cifs/file.c b/fs/cifs/file.c index f46904a4ead3..67139f9d583f 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -3039,7 +3039,7 @@ static void collect_uncached_write_data(struct cifs_aio_ctx *ctx) struct cifs_tcon *tcon; struct cifs_sb_info *cifs_sb; struct dentry *dentry = ctx->cfile->dentry; - int rc; + ssize_t rc;
tcon = tlink_tcon(ctx->cfile->tlink); cifs_sb = CIFS_SB(dentry->d_sb);