Messages in this thread Patch in this message | | | From | Eric Biggers <> | Subject | [PATCH] crypto: testmgr - allocate buffers with __GFP_COMP | Date | Thu, 11 Apr 2019 12:28:27 -0700 |
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From: Eric Biggers <ebiggers@google.com>
This is needed so that CONFIG_HARDENED_USERCOPY_PAGESPAN=y doesn't incorrectly report a buffer overflow when the destination of copy_from_iter() spans the page boundary in the 2-page buffer.
Fixes: 3f47a03df6e8 ("crypto: testmgr - add testvec_config struct and helper functions") Signed-off-by: Eric Biggers <ebiggers@google.com> --- crypto/testmgr.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/crypto/testmgr.c b/crypto/testmgr.c index 0f6bfb6ce6a46..3522c0bed2492 100644 --- a/crypto/testmgr.c +++ b/crypto/testmgr.c @@ -156,7 +156,8 @@ static int __testmgr_alloc_buf(char *buf[XBUFSIZE], int order) int i; for (i = 0; i < XBUFSIZE; i++) { - buf[i] = (char *)__get_free_pages(GFP_KERNEL, order); + buf[i] = (char *)__get_free_pages(GFP_KERNEL | __GFP_COMP, + order); if (!buf[i]) goto err_free_buf; } -- 2.21.0.392.gf8f6787159e-goog
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