kernel.git/arch/parisc/include/asm/uaccess.h, branch linux-4.1.y

parisc: fix copy_from_user()

2016-10-03T01:14:04Z

[ Upstream commit aace880feea38875fbc919761b77e5732a3659ef ] Cc: stable@vger.kernel.org Signed-off-by: Al Viro Signed-off-by: Sasha Levin

parisc: Unbreak handling exceptions from kernel modules

2016-04-20T05:08:54Z

[ Upstream commit 2ef4dfd9d9f288943e249b78365a69e3ea3ec072 ] Handling exceptions from modules never worked on parisc. It was just masked by the fact that exceptions from modules don't happen during normal use. When a module triggers an exception in get_user() we need to load the main kernel dp value before accessing the exception_data structure, and afterwards restore the original dp value of the module on exit. Noticed-by: Mikulas Patocka Signed-off-by: Helge Deller Cc: stable@vger.kernel.org Signed-off-by: Sasha Levin

parisc: macro whitespace fixes

2015-02-17T09:39:14Z

While working on arch/parisc/include/asm/uaccess.h, I noticed that some macros within this header are made harder to read because they violate a coding style rule: space is missing after comma. Fix it up. Signed-off-by: Michael S. Tsirkin Signed-off-by: Helge Deller

parisc/uaccess: fix sparse errors

2015-02-16T21:41:27Z

virtio wants to read bitwise types from userspace using get_user. At the moment this triggers sparse errors, since the value is passed through an integer. Fix that up using __force. Signed-off-by: Michael S. Tsirkin Acked-by: Helge Deller Signed-off-by: Helge Deller

parisc: Use BUILD_BUG() instead of undefined functions

2014-11-10T21:22:42Z

Signed-off-by: Helge Deller

Revert "parisc: implement full version of access_ok()"

2013-11-19T22:31:35Z

This reverts commit 63379c135331c724d40a87b98eb62d2122981341. It broke userspace and adding more checking is not needed. Even checking if a syscall would access memory in page zero doesn't makes sense since it may lead to some syscalls returning -EFAULT where we would return other error codes on other platforms. In summary, just drop this change and return to always return 1. Signed-off-by: Helge Deller

parisc: implement full version of access_ok()

2013-11-07T21:29:14Z

Up to now PA-RISC could live with a trivial version of access_ok(). Our fault handlers can correctly handle fault cases. But testcases showed that we need a better access check else we won't always return correct errno failure codes to userspace. Problem showed up during 32bit userspace tests in which writev() used a 32bit memory area and length which would then wrap around on 64bit kernel. Signed-off-by: Helge Deller

parisc: provide macro to create exception table entries

2013-11-07T21:25:33Z

Provide a macro ASM_EXCEPTIONTABLE_ENTRY() to create exception table entries and convert all open-coded places to use that macro. This patch is a first step toward creating a exception table which only holds 32bit pointers even on a 64bit kernel. That way in my own kernel I was able to reduce the in-kernel exception table from 44kB to 22kB. Signed-off-by: Helge Deller

parisc: uaccess: fix compiler warnings caused by __put_user casting

2013-04-25T20:36:42Z

When targetting 32-bit processors, __put_user emits a pair of stw instructions for the 8-byte case. If the type of __val is a pointer, the marshalling code casts it to the wider integer type of u64, resulting in the following compiler warnings: kernel/signal.c: In function 'copy_siginfo_to_user': kernel/signal.c:2752:11: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] kernel/signal.c:2752:11: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] [...] This patch fixes the warnings by removing the marshalling code and using the correct output modifiers in the __put_{user,kernel}_asm64 macros so that GCC will allocate the right registers without the need to extract the two words explicitly. Cc: Helge Deller Signed-off-by: Will Deacon Signed-off-by: Helge Deller

[PARISC] update parisc to use generic strncpy_from_user()

2012-05-31T10:14:37Z

Signed-off-by: James Bottomley