diff options
| author | Laura Abbott <labbott@redhat.com> | 2017-05-08 14:23:16 -0700 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2017-11-06 15:30:36 +0100 |
| commit | 246fead26f6bae9b0e087b0e2c5a6a1bbce785ac (patch) | |
| tree | 60d38cc96add0e514a1f2d6b86521e8faad29052 /arch/x86 | |
| parent | b403a48f289d0e8ae389f9fd47503d69d8c8bf9e (diff) | |
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: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/mm/numa_32.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c index 73a6d7395..58e7e9d4b 100644 --- a/arch/x86/mm/numa_32.c +++ b/arch/x86/mm/numa_32.c @@ -100,5 +100,6 @@ void __init initmem_init(void) printk(KERN_DEBUG "High memory starts at vaddr %08lx\n", (ulong) pfn_to_kaddr(highstart_pfn)); + __vmalloc_start_set = true; setup_bootmem_allocator(); } |