Searched hist:"1 d2ac7b6" (Results 1 – 1 of 1) sorted by relevance
/openbmc/linux/drivers/target/ |
H A D | target_core_user.c | 1d2ac7b6 Wed Oct 13 12:16:06 CDT 2021 Bodo Stroesser <bostroesser@gmail.com> scsi: target: tcmu: Allocate zeroed pages for data area
Tcmu populates the data area (used for communication with userspace) with pages that are allocated by calling alloc_page(GFP_NOIO). Therefore previous content of the allocated pages is exposed to user space. Avoid this by adding __GFP_ZERO flag.
Zeroing the pages does (nearly) not affect tcmu throughput, because allocated pages are re-used for the data transfers of later SCSI cmds.
Link: https://lore.kernel.org/r/20211013171606.25197-1-bostroesser@gmail.com Signed-off-by: Bodo Stroesser <bostroesser@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
|