lkdtm: fix memory leak of val
This case is supposed to read from a page after after it is freed, but it missed freeing val if we are not able to get a free page. Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> Signed-off-by: Kees Cook <keescook@chromium.org>
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@ -498,12 +498,13 @@ static void lkdtm_do_action(enum ctype which)
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}
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case CT_READ_BUDDY_AFTER_FREE: {
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unsigned long p = __get_free_page(GFP_KERNEL);
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int saw, *val = kmalloc(1024, GFP_KERNEL);
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int saw, *val;
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int *base;
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if (!p)
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break;
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val = kmalloc(1024, GFP_KERNEL);
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if (!val)
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break;
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