On Tue, Nov 15, 2016 at 11:47:04AM -0500, Theodore Ts'o wrote: > On Thu, Nov 03, 2016 at 03:03:02PM -0700, Eric Biggers wrote: > > With the new (in 4.9) option to use a virtually-mapped stack > > (CONFIG_VMAP_STACK), stack buffers cannot be used as input/output for > > the scatterlist crypto API because they may not be directly mappable to > > struct page. get_crypt_info() was using a stack buffer to hold the > > output from the encryption operation used to derive the per-file key. > > Fix it by using a heap buffer. > > > > This bug could most easily be observed in a CONFIG_DEBUG_SG kernel > > because this allowed the BUG in sg_set_buf() to be triggered. > > > > Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx> > > This commit is on the fscrypt and dev branches on ext4.git. > > - Ted Hi Ted, Would it make any sense to send these two patches to Linus for v4.9-rc6, given that they fix bugs introduced in 4.9 with the virtually-mapped stack feature? Or would you prefer to wait and have them go to 4.9 via stable? Note that CONFIG_VMAP_STACK defaults to y on x86_64. Thanks, Eric -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
