The patch titled
Subject: lib/test_meminit.c: use GFP_ATOMIC in RCU critical section
has been added to the -mm tree. Its filename is
test_meminit-use-gfp_atomic-in-rcu-critical-section.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/test_meminit-use-gfp_atomic-in-rcu-critical-section.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/test_meminit-use-gfp_atomic-in-rcu-critical-section.patch
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------------------------------------------------------
From: Alexander Potapenko <glider@xxxxxxxxxx>
Subject: lib/test_meminit.c: use GFP_ATOMIC in RCU critical section
kmalloc() shouldn't sleep while in RCU critical section, therefore use
GFP_ATOMIC instead of GFP_KERNEL.
The bug was spotted by the 0day kernel testing robot.
Link: http://lkml.kernel.org/r/20190725121703.210874-1-glider@xxxxxxxxxx
Fixes: 7e659650cbda ("lib: introduce test_meminit module")
Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/test_meminit.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/lib/test_meminit.c~test_meminit-use-gfp_atomic-in-rcu-critical-section
+++ a/lib/test_meminit.c
@@ -222,7 +222,7 @@ static int __init do_kmem_cache_size(siz
* Copy the buffer to check that it's not wiped on
* free().
*/
- buf_copy = kmalloc(size, GFP_KERNEL);
+ buf_copy = kmalloc(size, GFP_ATOMIC);
if (buf_copy)
memcpy(buf_copy, buf, size);
_
Patches currently in -mm which might be from glider@xxxxxxxxxx are
test_meminit-use-gfp_atomic-in-rcu-critical-section.patch
