[PATCH 24/25] spufs: Respect RLIMIT_CORE in spu coredump code

[Jeremy Kerr]

From: Michael Ellerman <michael at ellerman.id.au>

Currently the spu coredump code doesn't respect the ulimit, it should.

Signed-off-by: Michael Ellerman <michael at ellerman.id.au>
Signed-off-by: Jeremy Kerr <jk at ozlabs.org>

---
 arch/powerpc/platforms/cell/spufs/coredump.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/platforms/cell/spufs/coredump.c b/arch/powerpc/platforms/cell/spufs/coredump.c
index 6b8aef6..80f6236 100644
--- a/arch/powerpc/platforms/cell/spufs/coredump.c
+++ b/arch/powerpc/platforms/cell/spufs/coredump.c
@@ -53,8 +53,12 @@ static ssize_t do_coredump_read(int num, struct spu_context *ctx, void *buffer,
  */
 static int spufs_dump_write(struct file *file, const void *addr, int nr, loff_t *foffset)
 {
+	unsigned long limit = current->signal->rlim[RLIMIT_CORE].rlim_cur;
 	ssize_t written;
 
+	if (*foffset + nr > limit)
+		return -EIO;
+
 	written = file->f_op->write(file, addr, nr, &file->f_pos);
 	*foffset += written;