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authorDamien Le Moal <damien.lemoal@opensource.wdc.com>2022-06-02 15:03:44 +0300
committerJens Axboe <axboe@kernel.dk>2022-06-02 16:11:28 +0300
commitaacae8c469f9ce4b303a2eb61593ff522c1420bc (patch)
tree6493baa81013cfe7bf690157723e390eec42dcf6 /include/uapi/linux/reboot.h
parentc9fdf7b453874e37ff4c499140ba2ab56fa0c7e5 (diff)
downloadlinux-aacae8c469f9ce4b303a2eb61593ff522c1420bc.tar.xz
block: null_blk: Fix null_zone_write()
The bio and rq fields of struct nullb_cmd are now overlapping in a union. So we cannot use a test on ->bio being non-NULL to detect the NULL_Q_BIO queue mode. null_zone_write() use such broken test to set the sector position of a zone append write in the command bio or request. When the null_blk device uses the NULL_Q_MQ queue mode, null_zone_write() wrongly end up setting the bio sector position, resulting in the command request to be broken and random crashes following. Fix this by testing the device queue mode directly. Fixes: 8ba816b23abd ("null-blk: save memory footprint for struct nullb_cmd") Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20220602120344.1365329-1-damien.lemoal@opensource.wdc.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/uapi/linux/reboot.h')
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