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authorDan Carpenter <dan.carpenter@oracle.com>2021-09-21 23:33:35 +0300
committerSteve French <stfrench@microsoft.com>2021-09-21 20:51:50 -0500
commite946d3c887a9dc33aa82a349c6284f4a084163f4 (patch)
tree733ed2ab3f3d856302b7aef5b1ff0557b0e5b2b3 /fs/cifs/file.c
parentfdf5078458793fca9e9c0fb5e58a1a970ca0fdef (diff)
downloadlinux-e946d3c887a9dc33aa82a349c6284f4a084163f4.tar.bz2
cifs: fix a sign extension bug
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>
Diffstat (limited to 'fs/cifs/file.c')
-rw-r--r--fs/cifs/file.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 6796fc73b304..0ab5bb24b8ca 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -3113,7 +3113,7 @@ 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);