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The family and device comparisons were using memcmp(), but this could
lead to Out-of-bounds reads when the length was larger than the
buffers being compared. Since these appear to always be NUL-terminated
strings, just use strcmp() instead.
This was found with Clang under LTO:
[ 92.405851][ T1] kernel BUG at lib/string_helpers.c:980!
...
[ 92.409141][ T1] RIP: 0010:fortify_panic (fbdev.c:?)
...
[ 92.410056][ T1] ni_assign_device_routes (fbdev.c:?)
[ 92.410056][ T1] ? unittest_enter (fbdev.c:?)
[ 92.410056][ T1] ni_routes_unittest (ni_routes_test.c:?)
[ 92.410056][ T1] ? unittest_enter (fbdev.c:?)
[ 92.410056][ T1] __initstub__kmod_ni_routes_test__505_604_ni_routes_unittest6 (fbdev.c:?)
[ 92.410056][ T1] do_one_initcall (fbdev.c:?)
Link: https://lore.kernel.org/lkml/20220210072821.GD4074@xsang-OptiPlex-9020
Fixes: 4bb90c87abbe ("staging: comedi: add interface to ni routing table information")
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Spencer E. Olson <olsonse@umich.edu>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Lee Jones <lee.jones@linaro.org>
Reported-by: kernel test robot <oliver.sang@intel.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220215171017.1247291-1-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Move the main COMEDI driver headers out of "drivers/comedi/" into new
directory "include/linux/comedi/". These are "comedidev.h",
"comedilib.h", "comedi_pci.h", "comedi_pcmcia.h", and "comedi_usb.h".
Additionally, move the user-space API header "comedi.h" into
"include/uapi/linux/" and add "WITH Linux-syscall-note" to its
SPDX-License-Identifier.
Update the "COMEDI DRIVERS" section of the MAINTAINERS file to account
for these changes.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://lore.kernel.org/r/20211117120604.117740-2-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Fixes the following W=1 kernel build warning(s):
drivers/staging/comedi/drivers/ni_routes.c:249: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
drivers/staging/comedi/drivers/ni_routes.c:398: warning: Function parameter or member 'routes' not described in 'ni_route_set_has_source'
drivers/staging/comedi/drivers/ni_routes.c:398: warning: Function parameter or member 'source' not described in 'ni_route_set_has_source'
drivers/staging/comedi/drivers/ni_routes.c:524: warning: Function parameter or member 'src_sel_reg_value' not described in 'ni_find_route_source'
drivers/staging/comedi/drivers/ni_routes.c:524: warning: Function parameter or member 'dest' not described in 'ni_find_route_source'
drivers/staging/comedi/drivers/ni_routes.c:524: warning: Function parameter or member 'tables' not described in 'ni_find_route_source'
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Alexander A. Klimov" <grandmaster@al2klimov.de>
Cc: "Spencer E. Olson" <olsonse@umich.edu>
Cc: linux-staging@lists.linux.dev
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20210520122538.3470259-5-lee.jones@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Commit fa60ce2cb450 ("treewide: remove editor modelines and cruft")
is different from what I submitted.
My original patch [1] did treewide cleanups including the comedi driver.
Unfortunately, commit 8ffdff6a8cfb ("staging: comedi: move out of staging
directory") moved drivers/staging/comedi/ to drivers/comedi/ before my
patch landed on Linus' tree from akpm tree.
If Andrew Morton had used Git, 'git merge' would have resolved such file
moves properly without any manual intervention.
Patches in akpm tree often get broken in his quilt workflows, and then
people end up with sending fixup patches.
[1] https://lkml.kernel.org/r/20210324054457.1477489-1-masahiroy@kernel.org
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20210510063450.412055-1-masahiroy@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The comedi code came into the kernel back in 2008, but traces its
lifetime to much much earlier. It's been polished and buffed and
there's really nothing preventing it from being part of the "real"
portion of the kernel.
So move it to drivers/comedi/ as it belongs there.
Many thanks to the hundreds of developers who did the work to make this
happen.
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: H Hartley Sweeten <hsweeten@visionengravers.com>
Link: https://lore.kernel.org/r/YHauop4u3sP6lz8j@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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