I believe to have found a NULL pointer dereference on the code, but as I am new to this code I would like the opinion of more experienced people. I am not sure if it is the right procedure to send it here, since this file is not on the tree since v4.20. But as it still affects many stable releases, I think it's worth the try. Please let me know if there is a better procedure on this. Leonardo Bras (1): block/cfq : Include check to avoid NULL Pointer Dereferencing block/cfq-iosched.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) -- 2.20.1