From ee813c86f99006bf37826d195e7212cf98803de6 Mon Sep 17 00:00:00 2001 From: Alper Nebi Yasak Date: Wed, 9 Feb 2022 22:02:35 +0300 Subject: [PATCH] binman: Skip processing "hash" subnodes of FIT subsections Binman's FIT entry type can have image subentries with "hash" subnodes intended to be processed by mkimage, but not binman. However, the Entry class and any subclass that reuses its implementation tries to process these unconditionally. This can lead to an error when boards specify hash algorithms that binman doesn't support, but mkimage supports. Let entries skip processing these "hash" subnodes based on an instance variable, and set this instance variable for FIT subsections. Also re-enable processing of calculated and missing properties of FIT entries which was disabled to mitigate this issue. Signed-off-by: Alper Nebi Yasak Reviewed-by: Simon Glass --- tools/binman/entry.py | 23 +++++++-- tools/binman/etype/fit.py | 12 +---- tools/binman/ftest.py | 24 ++++++++++ tools/binman/test/221_fit_subentry_hash.dts | 52 +++++++++++++++++++++ 4 files changed, 97 insertions(+), 14 deletions(-) create mode 100644 tools/binman/test/221_fit_subentry_hash.dts diff --git a/tools/binman/entry.py b/tools/binman/entry.py index dc26f8f167..631215dfc8 100644 --- a/tools/binman/entry.py +++ b/tools/binman/entry.py @@ -78,6 +78,8 @@ class Entry(object): external: True if this entry contains an external binary blob bintools: Bintools used by this entry (only populated for Image) missing_bintools: List of missing bintools for this entry + update_hash: True if this entry's "hash" subnode should be + updated with a hash of the entry contents """ def __init__(self, section, etype, node, name_prefix=''): # Put this here to allow entry-docs and help to work without libfdt @@ -111,6 +113,7 @@ class Entry(object): self.allow_fake = False self.bintools = {} self.missing_bintools = [] + self.update_hash = True @staticmethod def FindEntryClass(etype, expanded): @@ -315,9 +318,11 @@ class Entry(object): if self.compress != 'none': state.AddZeroProp(self._node, 'uncomp-size') - err = state.CheckAddHashProp(self._node) - if err: - self.Raise(err) + + if self.update_hash: + err = state.CheckAddHashProp(self._node) + if err: + self.Raise(err) def SetCalculatedProperties(self): """Set the value of device-tree properties calculated by binman""" @@ -333,7 +338,9 @@ class Entry(object): state.SetInt(self._node, 'orig-size', self.orig_size, True) if self.uncomp_size is not None: state.SetInt(self._node, 'uncomp-size', self.uncomp_size) - state.CheckSetHashValue(self._node, self.GetData) + + if self.update_hash: + state.CheckSetHashValue(self._node, self.GetData) def ProcessFdt(self, fdt): """Allow entries to adjust the device tree @@ -1108,3 +1115,11 @@ features to produce new behaviours. btool = bintool.Bintool.create(name) tools[name] = btool return btool + + def SetUpdateHash(self, update_hash): + """Set whether this entry's "hash" subnode should be updated + + Args: + update_hash: True if hash should be updated, False if not + """ + self.update_hash = update_hash diff --git a/tools/binman/etype/fit.py b/tools/binman/etype/fit.py index a56b0564f9..cd7ebc571e 100644 --- a/tools/binman/etype/fit.py +++ b/tools/binman/etype/fit.py @@ -186,6 +186,8 @@ class Entry_fit(Entry_section): # 'data' property later. entry = Entry.Create(self.section, node, etype='section') entry.ReadNode() + # The hash subnodes here are for mkimage, not binman. + entry.SetUpdateHash(False) self._entries[rel_path] = entry for subnode in node.subnodes: @@ -294,13 +296,3 @@ class Entry_fit(Entry_section): def AddBintools(self, tools): super().AddBintools(tools) self.mkimage = self.AddBintool(tools, 'mkimage') - - def AddMissingProperties(self, have_image_pos): - # We don't want to interfere with any hash properties in the FIT, so - # disable this for now. - pass - - def SetCalculatedProperties(self): - # We don't want to interfere with any hash properties in the FIT, so - # disable this for now. - pass diff --git a/tools/binman/ftest.py b/tools/binman/ftest.py index 59b6d52fbe..b6801b7275 100644 --- a/tools/binman/ftest.py +++ b/tools/binman/ftest.py @@ -5160,5 +5160,29 @@ fdt fdtmap Extract the devicetree blob from the fdtmap self.assertRegex(err, "Image 'main-section'.*missing bintools.*: futility") + def testFitSubentryHashSubnode(self): + """Test an image with a FIT inside""" + data, _, _, out_dtb_name = self._DoReadFileDtb( + '221_fit_subentry_hash.dts', use_real_dtb=True, update_dtb=True) + + mkimage_dtb = fdt.Fdt.FromData(data) + mkimage_dtb.Scan() + binman_dtb = fdt.Fdt(out_dtb_name) + binman_dtb.Scan() + + # Check that binman didn't add hash values + fnode = binman_dtb.GetNode('/binman/fit/images/kernel/hash') + self.assertNotIn('value', fnode.props) + + fnode = binman_dtb.GetNode('/binman/fit/images/fdt-1/hash') + self.assertNotIn('value', fnode.props) + + # Check that mkimage added hash values + fnode = mkimage_dtb.GetNode('/images/kernel/hash') + self.assertIn('value', fnode.props) + + fnode = mkimage_dtb.GetNode('/images/fdt-1/hash') + self.assertIn('value', fnode.props) + if __name__ == "__main__": unittest.main() diff --git a/tools/binman/test/221_fit_subentry_hash.dts b/tools/binman/test/221_fit_subentry_hash.dts new file mode 100644 index 0000000000..2cb04f96d0 --- /dev/null +++ b/tools/binman/test/221_fit_subentry_hash.dts @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0+ + +/dts-v1/; + +/ { + #address-cells = <1>; + #size-cells = <1>; + + binman { + fit { + description = "test-desc"; + #address-cells = <1>; + + images { + kernel { + description = "Vanilla Linux kernel"; + type = "kernel"; + arch = "ppc"; + os = "linux"; + compression = "gzip"; + load = <00000000>; + entry = <00000000>; + hash { + algo = "sha1"; + }; + u-boot { + }; + }; + fdt-1 { + description = "Flattened Device Tree blob"; + type = "flat_dt"; + arch = "ppc"; + compression = "none"; + hash { + algo = "crc32"; + }; + u-boot-spl-dtb { + }; + }; + }; + + configurations { + default = "conf-1"; + conf-1 { + description = "Boot Linux kernel with FDT blob"; + kernel = "kernel"; + fdt = "fdt-1"; + }; + }; + }; + }; +}; -- 2.39.5