user/sven/linux.git/drivers/android, branch v4.4.148

binder: add missing binder_unlock()

2018-02-28T09:17:23Z

When commit 4be5a2810489 ("binder: check for binder_thread allocation failure in binder_poll()") was applied to 4.4-stable and 4.9-stable it was forgotten to release the global binder lock in the new error path. The global binder lock wasn't removed until v4.14, by commit a60b890f607d ("binder: remove global binder lock"). Fix the new error path to release the lock. Reported-by: Guenter Roeck Signed-off-by: Eric Biggers Signed-off-by: Greg Kroah-Hartman

binder: check for binder_thread allocation failure in binder_poll()

2018-02-25T10:03:38Z

commit f88982679f54f75daa5b8eff3da72508f1e7422f upstream. If the kzalloc() in binder_get_thread() fails, binder_poll() dereferences the resulting NULL pointer. Fix it by returning POLLERR if the memory allocation failed. This bug was found by syzkaller using fault injection. Reported-by: syzbot Fixes: 457b9a6f09f0 ("Staging: android: add binder driver") Cc: stable@vger.kernel.org Signed-off-by: Eric Biggers Signed-off-by: Greg Kroah-Hartman

ANDROID: binder: fix proc->tsk check.

2017-08-30T08:19:26Z

commit b2a6d1b999a4c13e5997bb864694e77172d45250 upstream. Commit c4ea41ba195d ("binder: use group leader instead of open thread")' was incomplete and didn't update a check in binder_mmap(), causing all mmap() calls into the binder driver to fail. Signed-off-by: Martijn Coenen Tested-by: John Stultz Signed-off-by: Greg Kroah-Hartman

binder: Use wake up hint for synchronous transactions.

2017-08-30T08:19:26Z

commit 00b40d613352c623aaae88a44e5ded7c912909d7 upstream. Use wake_up_interruptible_sync() to hint to the scheduler binder transactions are synchronous wakeups. Disable preemption while waking to avoid ping-ponging on the binder lock. Signed-off-by: Todd Kjos Signed-off-by: Omprakash Dhyade Signed-off-by: Greg Kroah-Hartman

binder: use group leader instead of open thread

2017-08-30T08:19:26Z

commit c4ea41ba195d01c9af66fb28711a16cc97caa9c5 upstream. The binder allocator assumes that the thread that called binder_open will never die for the lifetime of that proc. That thread is normally the group_leader, however it may not be. Use the group_leader instead of current. Signed-off-by: Todd Kjos Signed-off-by: Greg Kroah-Hartman

ANDROID: binder: Clear binder and cookie when setting handle in flat binder struct

2016-11-10T15:36:33Z

commit 4afb604e2d14d429ac9e1fd84b952602853b2df5 upstream. Prevents leaking pointers between processes Signed-off-by: Arve Hjønnevåg Signed-off-by: Martijn Coenen Signed-off-by: Greg Kroah-Hartman

ANDROID: binder: Add strong ref checks

2016-11-10T15:36:33Z

commit 0a3ffab93fe52530602fe47cd74802cffdb19c05 upstream. Prevent using a binder_ref with only weak references where a strong reference is required. Signed-off-by: Arve Hjønnevåg Signed-off-by: Martijn Coenen Signed-off-by: Greg Kroah-Hartman

drivers: android: correct the size of struct binder_uintptr_t for BC_DEAD_BINDER_DONE

2016-03-03T23:07:10Z

commit 7a64cd887fdb97f074c3fda03bee0bfb9faceac3 upstream. There's one point was missed in the patch commit da49889deb34 ("staging: binder: Support concurrent 32 bit and 64 bit processes."). When configure BINDER_IPC_32BIT, the size of binder_uintptr_t was 32bits, but size of void * is 64bit on 64bit system. Correct it here. Signed-off-by: Lisa Du Signed-off-by: Nicolas Boichat Fixes: da49889deb34 ("staging: binder: Support concurrent 32 bit and 64 bit processes.") Acked-by: Olof Johansson Signed-off-by: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman

mm: mark most vm_operations_struct const

2015-09-10T20:29:01Z

With two exceptions (drm/qxl and drm/radeon) all vm_operations_struct structs should be constant. Signed-off-by: Kirill A. Shutemov Reviewed-by: Oleg Nesterov Cc: "H. Peter Anvin" Cc: Andy Lutomirski Cc: Dave Hansen Cc: Ingo Molnar Cc: Minchan Kim Cc: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

android: binder: fix binder mmap failures

2015-03-02T02:43:51Z

binder_update_page_range() initializes only addr and size fields in 'struct vm_struct tmp_area;' and passes it to map_vm_area(). Before 71394fe50146 ("mm: vmalloc: add flag preventing guard hole allocation") this was because map_vm_area() didn't use any other fields in vm_struct except addr and size. Now get_vm_area_size() (used in map_vm_area()) reads vm_struct's flags to determine whether vm area has guard hole or not. binder_update_page_range() don't initialize flags field, so this causes following binder mmap failures: -----------[ cut here ]------------ WARNING: CPU: 0 PID: 1971 at mm/vmalloc.c:130 vmap_page_range_noflush+0x119/0x144() CPU: 0 PID: 1971 Comm: healthd Not tainted 4.0.0-rc1-00399-g7da3fdc-dirty #157 Hardware name: ARM-Versatile Express [] (unwind_backtrace) from [] (show_stack+0x11/0x14) [] (show_stack) from [] (dump_stack+0x59/0x7c) [] (dump_stack) from [] (warn_slowpath_common+0x55/0x84) [] (warn_slowpath_common) from [] (warn_slowpath_null+0x17/0x1c) [] (warn_slowpath_null) from [] (vmap_page_range_noflush+0x119/0x144) [] (vmap_page_range_noflush) from [] (map_vm_area+0x27/0x48) [] (map_vm_area) from [] (binder_update_page_range+0x12f/0x27c) [] (binder_update_page_range) from [] (binder_mmap+0xbf/0x1ac) [] (binder_mmap) from [] (mmap_region+0x2eb/0x4d4) [] (mmap_region) from [] (do_mmap_pgoff+0x1e7/0x250) [] (do_mmap_pgoff) from [] (vm_mmap_pgoff+0x45/0x60) [] (vm_mmap_pgoff) from [] (SyS_mmap_pgoff+0x5d/0x80) [] (SyS_mmap_pgoff) from [] (ret_fast_syscall+0x1/0x5c) ---[ end trace 48c2c4b9a1349e54 ]--- binder: 1982: binder_alloc_buf failed to map page at f0e00000 in kernel binder: binder_mmap: 1982 b6bde000-b6cdc000 alloc small buf failed -12 Use map_kernel_range_noflush() instead of map_vm_area() as this is better API for binder's purposes and it allows to get rid of 'vm_struct tmp_area' at all. Fixes: 71394fe50146 ("mm: vmalloc: add flag preventing guard hole allocation") Signed-off-by: Andrey Ryabinin Reported-by: Amit Pundir Tested-by: Amit Pundir Acked-by: David Rientjes Tested-by: John Stultz Signed-off-by: Greg Kroah-Hartman