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boundary="===============7772871477701675321==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============7772871477701675321== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="TVEla8TlWZXg4DbWQoDDyitEWy01Ku6r3" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --TVEla8TlWZXg4DbWQoDDyitEWy01Ku6r3 Content-Type: multipart/mixed; boundary="bXZ1IWHlQt0CDLxf6caHLlw6e0y21LA6O" --bXZ1IWHlQt0CDLxf6caHLlw6e0y21LA6O Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 2020/8/29 =E4=B8=8B=E5=8D=883:49, Qu Wenruo wrote: >=20 >=20 > On 2020/8/29 =E4=B8=8B=E5=8D=883:44, Qu Wenruo wrote: >> Hi, >> >> Recently built a v5.9-rc2 kernel, it boots fine, but unable to load an= y >> kernel module. >> >> After some debugging, it shows that it's due to RWX check failure: >> >> load_module: start >> module_enforce_rwx_sections: index=3D22 sh_flags=3D0x7 shf_wx=3D0x5 >> layout_and_allocate: module enforce rwx sections >> load_module: failed to alloc layout and allocate >> load_module: end >> >> Futhermore, it's unable to disable the RWX check through "make >> menuconfig", since the ARCH_OPTIONAL_KERNEL_RWX is no for arm64. >> >> The offending section 22 looks like this: (the kernel reports 38 >> sectors, while we only have 37, thus near-by sections are also shown h= ere). >> >> 20 .data 00000aa0 0000000000000000 0000000000000000 00086d= 08 >> 2**3 >> CONTENTS, ALLOC, LOAD, RELOC, DATA >> 21 __bug_table 000000cc 0000000000000000 0000000000000000 000877= a8 >> 2**2 >> CONTENTS, ALLOC, LOAD, RELOC, DATA >> 22 __dyndbg 0000b9b8 0000000000000000 0000000000000000 000878= 78 >> 2**3 >> CONTENTS, ALLOC, LOAD, RELOC, DATA >> 23 .data.unlikely 00000012 0000000000000000 0000000000000000 >> 00093230 2**0 >> CONTENTS, ALLOC, LOAD, DATA >> >> I'm using GCC 10.2.0, could this be the cause? >=20 > I should check the git log, the module_enforce_rwx_sections() is just > recently added by commit 5c3a7db0c7ec ("module: Harden STRICT_MODULE_RW= X"). >=20 > Hi Peter, any idea how could this commit causing a regression on arm64 > but not on x86_64? And obviously, reverting it solves the problem of mine. (Now happy working 4K sector size btrfs support on 64K page size system) Thanks, Qu >=20 > Thanks, > Qu >=20 >> >> Thanks, >> Qu >> >> >> >=20 --bXZ1IWHlQt0CDLxf6caHLlw6e0y21LA6O-- --TVEla8TlWZXg4DbWQoDDyitEWy01Ku6r3 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEELd9y5aWlW6idqkLhwj2R86El/qgFAl9KClIACgkQwj2R86El /qhCggf/Uub/oMRfLkHbu1GzbWTjhJ+s1qPBYFIyMyGaVgrcDEDHC7q9h/48CSp3 QqkmtuVRNlKLBZlTia+3ECdlvlTfeuSxQKAM6dGqE84vZS8eSTNb8ZnPprfr8Qzc i/BtP4zJ+DzJv3QiKpkBKbzhLgrNl2NSr90/A48W8E/y+hc5Q2jNG+de9uBQ0YpP 32yboyVXriQKwYP16v3VX+4cC2owJbkIyx0FHZEoiE3TdCg33ImgaD3RX3TEMMro r9QQNevpcFH370YNocmzevbEuqAFE+ePPvZn3B+LWI6ijswW0hVg8MCvVaNvQyHH Y1kbKRy1vJ0ibz48gbDjI1jL3Q7f+g== =UfcU -----END PGP SIGNATURE----- --TVEla8TlWZXg4DbWQoDDyitEWy01Ku6r3-- --===============7772871477701675321== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============7772871477701675321==--