| Message ID | 1476699404-5977-1-git-send-email-geert@linux-m68k.org (mailing list archive) |
|---|---|
| State | Accepted, archived |
| Headers | show |
On Mon, Oct 17, 2016 at 12:16:44PM +0200, Geert Uytterhoeven wrote: > with gcc 4.1.2: > > fs/xfs/xfs_reflink.c: In function ‘xfs_reflink_reserve_cow_range’: > fs/xfs/xfs_reflink.c:327: warning: ‘error’ may be used uninitialized in this function > > Indeed, if "count" is zero, the function will return an uninitialized > error value. > > While "count" is unlikely to be zero, this function is called through > the public iomap API. Hence fix this by preinitializing error to zero. > > Fixes: 2a06705cd5954030 ("xfs: create delalloc extents in CoW fork") > Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> > --- > fs/xfs/xfs_reflink.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c > index 5965e9455d91e036..d48a7cc2fe007f66 100644 > --- a/fs/xfs/xfs_reflink.c > +++ b/fs/xfs/xfs_reflink.c > @@ -324,7 +324,7 @@ > struct xfs_mount *mp = ip->i_mount; > xfs_fileoff_t offset_fsb, end_fsb; > bool skipped = false; > - int error; > + int error = 0; > > trace_xfs_reflink_reserve_cow_range(ip, offset, count); > > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index 5965e9455d91e036..d48a7cc2fe007f66 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -324,7 +324,7 @@ struct xfs_mount *mp = ip->i_mount; xfs_fileoff_t offset_fsb, end_fsb; bool skipped = false; - int error; + int error = 0; trace_xfs_reflink_reserve_cow_range(ip, offset, count);
with gcc 4.1.2: fs/xfs/xfs_reflink.c: In function ‘xfs_reflink_reserve_cow_range’: fs/xfs/xfs_reflink.c:327: warning: ‘error’ may be used uninitialized in this function Indeed, if "count" is zero, the function will return an uninitialized error value. While "count" is unlikely to be zero, this function is called through the public iomap API. Hence fix this by preinitializing error to zero. Fixes: 2a06705cd5954030 ("xfs: create delalloc extents in CoW fork") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> --- fs/xfs/xfs_reflink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)