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authorAlexander Potapenko <glider@google.com>2019-08-03 04:49:22 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2019-08-03 14:02:01 (GMT)
commit733d1d1a7745113e2b6a1761300e7e26b6eb6009 (patch)
treef7338a50f56560461c195820e98a9ddee1b350fc
parentcbedfe11347fe418621bd188d58a206beb676218 (diff)
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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@google.com Fixes: 7e659650cbda ("lib: introduce test_meminit module") Signed-off-by: Alexander Potapenko <glider@google.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Reported-by: kernel test robot <lkp@intel.com> Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--lib/test_meminit.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/test_meminit.c b/lib/test_meminit.c
index 62d19f2..9729f27 100644
--- a/lib/test_meminit.c
+++ b/lib/test_meminit.c
@@ -222,7 +222,7 @@ static int __init do_kmem_cache_size(size_t size, bool want_ctor,
* 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);