Messages in this thread | | | Date | Tue, 21 Jan 2014 20:22:09 -0800 | From | Jens Axboe <> | Subject | Re: [RFC PATCH V3 1/2] null_blk: Null pointer deference problem in alloc_page_buffers |
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On Tue, Jan 21 2014, Raghavendra K T wrote: > If we load the null_blk module with bs=8k we get following oops: > [ 3819.812190] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 > [ 3819.812387] IP: [<ffffffff81170aa5>] create_empty_buffers+0x28/0xaf > [ 3819.812527] PGD 219244067 PUD 215a06067 PMD 0 > [ 3819.812640] Oops: 0000 [#1] SMP > [ 3819.812772] Modules linked in: null_blk(+) > > Fix that by resetting block size to PAGE_SIZE if it is greater than PAGE_SIZE
Thanks, applied.
-- Jens Axboe
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