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Groups > linux.kernel > #1669422
| From | Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 4.9 22/60] x86/mm/32: Set the __vmalloc_start_set flag in initmem_init() |
| Date | 2017-06-19 18:10 +0200 |
| Message-ID | <tU7py-4Ul-75@gated-at.bofh.it> (permalink) |
| References | <tU6MO-4pB-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Laura Abbott <labbott@redhat.com>
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>
---
arch/x86/mm/numa_32.c | 1 +
1 file changed, 1 insertion(+)
--- 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();
}
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[PATCH 4.9 00/60] 4.9.34-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-19 18:10 +0200 [PATCH 4.9 06/60] [media] vb2: Fix an off by one error in vb2_plane_vaddr Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-19 18:10 +0200 [PATCH 4.9 14/60] mac80211: fix IBSS presp allocation size Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-19 18:10 +0200 [PATCH 4.9 37/60] USB: gadget: dummy_hcd: fix hub-descriptor removable fields Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-19 18:10 +0200 [PATCH 4.9 09/60] drm/amdgpu: Fix overflow of watermark calcs at > 4k resolutions. Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-19 18:10 +0200 [PATCH 4.9 15/60] mac80211: strictly check mesh address extension mode Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-19 18:10 +0200 [PATCH 4.9 22/60] x86/mm/32: Set the __vmalloc_start_set flag in initmem_init() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-19 18:10 +0200 [PATCH 4.9 13/60] mac80211: fix packet statistics for fast-RX Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-06-19 18:10 +0200
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