On Fri, Jun 17, 2016 at 08:57:03PM +0200, Mathias Krause wrote: > The callback function dma_buf_describe() returns an int not void so the > function pointer cast in dma_buf_show() is wrong. dma_buf_describe() can > also fail when acquiring the mutex gets interrupted so always returning > 0 in dma_buf_show() is wrong, too. > > Fix both issues by casting the function pointer to the correct type and > propagate its return value. > > This type mismatch was caught by the PaX RAP plugin. > > Signed-off-by: Mathias Krause <minipli@xxxxxxxxxxxxxx> > Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx> > Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> > Cc: PaX Team <pageexec@xxxxxxxxxxx> > --- > drivers/dma-buf/dma-buf.c | 5 ++--- > 1 file changed, 2 insertions(+), 3 deletions(-) > > diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c > index 6355ab38d630..0f2a4592fdd2 100644 > --- a/drivers/dma-buf/dma-buf.c > +++ b/drivers/dma-buf/dma-buf.c > @@ -881,10 +881,9 @@ static int dma_buf_describe(struct seq_file *s) > > static int dma_buf_show(struct seq_file *s, void *unused) > { > - void (*func)(struct seq_file *) = s->private; > + int (*func)(struct seq_file *) = s->private; > > - func(s); > - return 0; > + return func(s); Probably even better to just nuke that indirection. Set this pointer to NULL and inline dma_buf_describe into dma_buf_show. -Daniel > } > > static int dma_buf_debug_open(struct inode *inode, struct file *file) > -- > 1.7.10.4 > -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel