On Mon, 2015-04-13 at 23:21 +0900, Akinobu Mita wrote: > When CONFIG_DEBUG_SG=y and DIF protection support enabled, kernel > BUG()s are triggered due to the following two issues: > > 1) prot_sg is not initialized by sg_init_table(). > > When CONFIG_DEBUG_SG=y, scatterlist helpers check sg entry has a > correct magic value. > > 2) vmalloc'ed buffer is passed to sg_set_buf(). > > sg_set_buf() uses virt_to_page() to convert virtual address to struct > page, but it doesn't work with vmalloc address. vmalloc_to_page() > should be used instead. As prot_buf isn't usually too large, so > fix it by allocating prot_buf by kmalloc instead of vmalloc. > > Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx> > Cc: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> > Cc: Sagi Grimberg <sagig@xxxxxxxxxxxx> > Cc: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx> > Cc: Christoph Hellwig <hch@xxxxxx> > Cc: "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> > Cc: target-devel@xxxxxxxxxxxxxxx > Cc: linux-scsi@xxxxxxxxxxxxxxx > --- > drivers/target/target_core_file.c | 15 ++++++++------- > 1 file changed, 8 insertions(+), 7 deletions(-) > Thanks for testing with CONFIG_DEBUG_SG=y. Applied to target-pending/for-next, with CC' for v3.14.y stable. Thank you, --nab -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
