From dd05add7b2b6004c5fa3a1f276f56d8668f86b65 Mon Sep 17 00:00:00 2001 From: Paulo Alcantara Date: Sat, 26 Sep 2026 19:20:30 -0300 Subject: netfs: zero the tail of a short DIO/unbuffered read The buffered read collector zero-fills the tail of a short read that stops below the inode's i_size (netfs_clear_unread()), so a read that races an extending write still returns the expected number of bytes. The non-buffered collector path does no such thing: it just records how much was transferred. Add the same zero-fill for the non-buffered case, gated on NETFS_SREQ_CLEAR_TAIL: a subreq's source sets that flag when a short result from it is known to be safe to treat as a hole, as opposed to NETFS_SREQ_HIT_EOF, which means the read genuinely ran off the end of the file and should be reported short as-is. Only CLEAR_TAIL should zero-fill here; a real EOF must stay a real short read. No source currently sets CLEAR_TAIL on an unbuffered/DIO subrequest, so this is inert on its own -- a following change teaches cifs to set it in the one case that needs it. Fixes: e2d46f2ec332 ("netfs: Change the read result collector to only use one work item") Reviewed-by: David Howells Reviewed-by: Namjae Jeon Signed-off-by: Paulo Alcantara Cc: Christian Brauner Cc: Matthew Wilcox Cc: Ronnie Sahlberg Cc: Shyam Prasad N Cc: Tom Talpey Cc: Bharath SM Cc: stable@vger.kernel.org --- drivers/tee/Kconfig | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 drivers/tee/Kconfig (limited to 'drivers/tee/Kconfig') diff --git a/drivers/tee/Kconfig b/drivers/tee/Kconfig new file mode 100644 index 000000000..98c3ad083 --- /dev/null +++ b/drivers/tee/Kconfig @@ -0,0 +1,25 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Generic Trusted Execution Environment Configuration +menuconfig TEE + tristate "Trusted Execution Environment support" + depends on HAVE_ARM_SMCCC || COMPILE_TEST || CPU_SUP_AMD + select CRYPTO_LIB_SHA1 + select DMA_SHARED_BUFFER + select GENERIC_ALLOCATOR + help + This implements a generic interface towards a Trusted Execution + Environment (TEE). + +if TEE + +config TEE_DMABUF_HEAPS + bool + depends on HAS_DMA && DMABUF_HEAPS + default y + +source "drivers/tee/optee/Kconfig" +source "drivers/tee/amdtee/Kconfig" +source "drivers/tee/tstee/Kconfig" +source "drivers/tee/qcomtee/Kconfig" + +endif -- cgit v1.3.1