block/loop: Fix NULL pointer dereference in lo_rw_aio()#851
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block/loop: Fix NULL pointer dereference in lo_rw_aio()#851blktests-ci[bot] wants to merge 1 commit into
blktests-ci[bot] wants to merge 1 commit into
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lo->lo_backing_file can be NULL when the loop device is being cleared, causing NULL pointer dereference in lo_rw_aio(). Add a defensive check to prevent kernel crash. Also fix loop_attr_backing_file_show() to use PTR_ERR_OR_ZERO() for correct NULL pointer handling. Fixes: bc07c10 ("block: loop: support DIO & AIO") Signed-off-by: Hongling Zeng <zenghongling@kylinos.cn>
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Upstream branch: 70eda68 |
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Pull request for series with
subject: block/loop: Fix NULL pointer dereference in lo_rw_aio()
version: 1
url: https://patchwork.kernel.org/project/linux-block/list/?series=1097014