3.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Michael Ellerman <[email protected]> [ Upstream commit 99acc9bede06bbb2662aafff51f5b9e529fa845e ] If a process dumps core while it has SPU contexts active then we have code to also dump information about the SPU contexts. Unfortunately it's been broken for 3 1/2 years, and we didn't notice. In commit 7b1f4020d0d1 ("spufs: get rid of dump_emit() wrappers") the nread variable was removed and rc used instead. That means when the loop exits successfully, rc has the number of bytes read, but it's then used as the return value for the function, which should return 0 on success. So fix it by setting rc = 0 before returning in the success case. Fixes: 7b1f4020d0d1 ("spufs: get rid of dump_emit() wrappers") Signed-off-by: Michael Ellerman <[email protected]> Acked-by: Jeremy Kerr <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/powerpc/platforms/cell/spufs/coredump.c | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/powerpc/platforms/cell/spufs/coredump.c +++ b/arch/powerpc/platforms/cell/spufs/coredump.c @@ -174,6 +174,8 @@ static int spufs_arch_write_note(struct if (!dump_skip(cprm, roundup(cprm->written - total + sz, 4) - cprm->written)) goto Eio; + + rc = 0; out: free_page((unsigned long)buf); return rc;
