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| author | Laura Abbott <labbott@redhat.com> | 2017-05-08 14:23:16 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-26 07:13:09 +0200 |
| commit | 93d022e25642036406983d9608852c605bfd5227 (patch) | |
| tree | 6f8f5d31070d8f6dc20608307d13edb99dca916b /drivers | |
| parent | c79aab7007d87c4c57b3538ac2dd2b04508fcbf8 (diff) | |
| download | linux-stable-93d022e25642036406983d9608852c605bfd5227.tar.gz linux-stable-93d022e25642036406983d9608852c605bfd5227.tar.bz2 linux-stable-93d022e25642036406983d9608852c605bfd5227.zip | |
x86/mm/32: Set the '__vmalloc_start_set' flag in initmem_init()
commit 861ce4a3244c21b0af64f880d5bfe5e6e2fb9e4a upstream.
'__vmalloc_start_set' currently only gets set in initmem_init() when
!CONFIG_NEED_MULTIPLE_NODES. This breaks detection of vmalloc address
with virt_addr_valid() with CONFIG_NEED_MULTIPLE_NODES=y, causing
a kernel crash:
[mm/usercopy] 517e1fbeb6: kernel BUG at arch/x86/mm/physaddr.c:78!
Set '__vmalloc_start_set' appropriately for that case as well.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: dc16ecf7fd1f ("x86-32: use specific __vmalloc_start_set flag in __virt_addr_valid")
Link: http://lkml.kernel.org/r/1494278596-30373-1-git-send-email-labbott@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions