nixpkgs/pkgs/applications/virtualization/xen/4.5.nix
Michał Pałka 80e0cda7ff xen: patch for XSAs: 216, 217, 218, 219, 220, 221, 222, and 224
XSA-216 Issue Description:

> The block interface response structure has some discontiguous fields.
> Certain backends populate the structure fields of an otherwise
> uninitialized instance of this structure on their stacks, leaking
> data through the (internal or trailing) padding field.

More: https://xenbits.xen.org/xsa/advisory-216.html

XSA-217 Issue Description:

> Domains controlling other domains are permitted to map pages owned by
> the domain being controlled.  If the controlling domain unmaps such a
> page without flushing the TLB, and if soon after the domain being
> controlled transfers this page to another PV domain (via
> GNTTABOP_transfer or, indirectly, XENMEM_exchange), and that third
> domain uses the page as a page table, the controlling domain will have
> write access to a live page table until the applicable TLB entry is
> flushed or evicted.  Note that the domain being controlled is
> necessarily HVM, while the controlling domain is PV.

More: https://xenbits.xen.org/xsa/advisory-217.html

XSA-218 Issue Description:

> We have discovered two bugs in the code unmapping grant references.
>
> * When a grant had been mapped twice by a backend domain, and then
> unmapped by two concurrent unmap calls, the frontend may be informed
> that the page had no further mappings when the first call completed rather
> than when the second call completed.
>
> * A race triggerable by an unprivileged guest could cause a grant
> maptrack entry for grants to be "freed" twice.  The ultimate effect of
> this would be for maptrack entries for a single domain to be re-used.

More: https://xenbits.xen.org/xsa/advisory-218.html

XSA-219 Issue Description:

> When using shadow paging, writes to guest pagetables must be trapped and
> emulated, so the shadows can be suitably adjusted as well.
>
> When emulating the write, Xen maps the guests pagetable(s) to make the final
> adjustment and leave the guest's view of its state consistent.
>
> However, when mapping the frame, Xen drops the page reference before
> performing the write.  This is a race window where the underlying frame can
> change ownership.
>
> One possible attack scenario is for the frame to change ownership and to be
> inserted into a PV guest's pagetables.  At that point, the emulated write will
> be an unaudited modification to the PV pagetables whose value is under guest
> control.

More: https://xenbits.xen.org/xsa/advisory-219.html

XSA-220 Issue Description:

> Memory Protection Extensions (MPX) and Protection Key (PKU) are features in
> newer processors, whose state is intended to be per-thread and context
> switched along with all other XSAVE state.
>
> Xen's vCPU context switch code would save and restore the state only
> if the guest had set the relevant XSTATE enable bits.  However,
> surprisingly, the use of these features is not dependent (PKU) or may
> not be dependent (MPX) on having the relevant XSTATE bits enabled.
>
> VMs which use MPX or PKU, and context switch the state manually rather
> than via XSAVE, will have the state leak between vCPUs (possibly,
> between vCPUs in different guests).  This in turn corrupts state in
> the destination vCPU, and hence may lead to weakened protections
>
> Experimentally, MPX appears not to make any interaction with BND*
> state if BNDCFGS.EN is set but XCR0.BND{CSR,REGS} are clear.  However,
> the SDM is not clear in this case; therefore MPX is included in this
> advisory as a precaution.

More: https://xenbits.xen.org/xsa/advisory-220.html

XSA-221 Issue Description:

> When polling event channels, in general arbitrary port numbers can be
> specified.  Specifically, there is no requirement that a polled event
> channel ports has ever been created.  When the code was generalised
> from an earlier implementation, introducing some intermediate
> pointers, a check should have been made that these intermediate
> pointers are non-NULL.  However, that check was omitted.

More: https://xenbits.xen.org/xsa/advisory-221.html

XSA-222 Issue Description:

> Certain actions require removing pages from a guest's P2M
> (Physical-to-Machine) mapping.  When large pages are in use to map
> guest pages in the 2nd-stage page tables, such a removal operation may
> incur a memory allocation (to replace a large mapping with individual
> smaller ones).  If this allocation fails, these errors are ignored by
> the callers, which would then continue and (for example) free the
> referenced page for reuse.  This leaves the guest with a mapping to a
> page it shouldn't have access to.
>
> The allocation involved comes from a separate pool of memory created
> when the domain is created; under normal operating conditions it never
> fails, but a malicious guest may be able to engineer situations where
> this pool is exhausted.

More: https://xenbits.xen.org/xsa/advisory-222.html

XSA-224 Issue Description:

> We have discovered a number of bugs in the code mapping and unmapping
> grant references.
>
> * If a grant is mapped with both the GNTMAP_device_map and
> GNTMAP_host_map flags, but unmapped only with host_map, the device_map
> portion remains but the page reference counts are lowered as though it
> had been removed. This bug can be leveraged cause a page's reference
> counts and type counts to fall to zero while retaining writeable
> mappings to the page.
>
> * Under some specific conditions, if a grant is mapped with both the
> GNTMAP_device_map and GNTMAP_host_map flags, the operation may not
> grab sufficient type counts.  When the grant is then unmapped, the
> type count will be erroneously reduced.  This bug can be leveraged
> cause a page's reference counts and type counts to fall to zero while
> retaining writeable mappings to the page.
>
> * When a grant reference is given to an MMIO region (as opposed to a
> normal guest page), if the grant is mapped with only the
> GNTMAP_device_map flag set, a mapping is created at host_addr anyway.
> This does *not* cause reference counts to change, but there will be no
> record of this mapping, so it will not be considered when reporting
> whether the grant is still in use.

More: https://xenbits.xen.org/xsa/advisory-224.html
2017-06-26 07:01:24 +00:00

418 lines
15 KiB
Nix

{ stdenv, callPackage, fetchurl, fetchpatch, fetchgit
, withInternalQemu ? true
, withInternalTraditionalQemu ? true
, withInternalSeabios ? true
, withSeabios ? !withInternalSeabios, seabios ? null
, withInternalOVMF ? false # FIXME: tricky to build
, withOVMF ? false, OVMF
, withLibHVM ? true
# qemu
, udev, pciutils, xorg, SDL, pixman, acl, glusterfs, spice_protocol, usbredir
, alsaLib
, ... } @ args:
assert withInternalSeabios -> !withSeabios;
assert withInternalOVMF -> !withOVMF;
with stdenv.lib;
# Patching XEN? Check the XSAs at
# https://xenbits.xen.org/xsa/
# and try applying all the ones we don't have yet.
let
xsaPatch = { name , sha256 }: (fetchpatch {
url = "https://xenbits.xen.org/xsa/xsa${name}.patch";
inherit sha256;
});
qemuDeps = [
udev pciutils xorg.libX11 SDL pixman acl glusterfs spice_protocol usbredir
alsaLib
];
in
callPackage (import ./generic.nix (rec {
version = "4.5.5";
src = fetchurl {
url = "http://bits.xensource.com/oss-xen/release/${version}/xen-${version}.tar.gz";
sha256 = "1y74ms4yc3znf8jc3fgyq94va2y0pf7jh8m9pfqnpgklywqnw8g2";
};
# Sources needed to build tools and firmwares.
xenfiles = optionalAttrs withInternalQemu {
"qemu-xen" = {
src = fetchgit {
url = https://xenbits.xen.org/git-http/qemu-xen.git;
rev = "refs/tags/qemu-xen-${version}";
sha256 = "014s755slmsc7xzy7qhk9i3kbjr2grxb5yznjp71dl6xxfvnday2";
};
buildInputs = qemuDeps;
patches = [
(xsaPatch {
name = "197-4.5-qemuu";
sha256 = "09gp980qdlfpfmxy0nk7ncyaa024jnrpzx9gpq2kah21xygy5myx";
})
(xsaPatch {
name = "208-qemuu-4.7";
sha256 = "0z9b1whr8rp2riwq7wndzcnd7vw1ckwx0vbk098k2pcflrzppgrb";
})
(xsaPatch {
name = "209-qemuu/0001-display-cirrus-ignore-source-pitch-value-as-needed-i";
sha256 = "1xvxzsrsq05fj6szjlpbgg4ia3cw54dn5g7xzq1n1dymbhv606m0";
})
(xsaPatch {
name = "209-qemuu/0002-cirrus-add-blit_is_unsafe-call-to-cirrus_bitblt_cput";
sha256 = "0avxqs9922qjfsxxlk7bh10432a526j2yyykhags8dk1bzxkpxwv";
})
(xsaPatch {
name = "211-qemuu-4.6";
sha256 = "1g090xs8ca8676vyi78b99z5yjdliw6mxkr521b8kimhf8crx4yg";
})
(xsaPatch {
name = "216-qemuu-4.5";
sha256 = "0nh5akbal93czia1gh1pzvwq7gc4zwiyr1hbyk1m6wwdmqv6ph61";
})
];
meta.description = "Xen's fork of upstream Qemu";
};
} // optionalAttrs withInternalTraditionalQemu {
"qemu-xen-traditional" = {
src = fetchgit {
url = https://xenbits.xen.org/git-http/qemu-xen-traditional.git;
rev = "refs/tags/xen-${version}";
sha256 = "0n0ycxlf1wgdjkdl8l2w1i0zzssk55dfv67x8i6b2ima01r0k93r";
};
buildInputs = qemuDeps;
patches = [
(xsaPatch {
name = "197-4.5-qemut";
sha256 = "17l7npw00gyhqzzaqamwm9cawfvzm90zh6jjyy95dmqbh7smvy79";
})
(xsaPatch {
name = "199-trad";
sha256 = "0dfw6ciycw9a9s97sbnilnzhipnzmdm9f7xcfngdjfic8cqdcv42";
})
(xsaPatch {
name = "208-qemut";
sha256 = "0960vhchixp60j9h2lawgbgzf6mpcdk440kblk25a37bd6172l54";
})
(xsaPatch {
name = "209-qemut";
sha256 = "1hq8ghfzw6c47pb5vf9ngxwgs8slhbbw6cq7gk0nam44rwvz743r";
})
(xsaPatch {
name = "211-qemut-4.5";
sha256 = "1z3phabvqmxv4b5923fx63hwdg4v1fnl15zbl88873ybqn0hp50f";
})
];
postPatch = ''
substituteInPlace xen-hooks.mak \
--replace /usr/include/pci ${pciutils}/include/pci
'';
meta.description = "Xen's fork of upstream Qemu that uses old device model";
};
} // optionalAttrs withInternalSeabios {
"firmware/seabios-dir-remote" = {
src = fetchgit {
url = https://xenbits.xen.org/git-http/seabios.git;
rev = "e51488c5f8800a52ac5c8da7a31b85cca5cc95d2";
#rev = "rel-1.7.5";
sha256 = "0jk54ybhmw97pzyhpm6jr2x99f702kbn0ipxv5qxcbynflgdazyb";
};
patches = [ ./0000-qemu-seabios-enable-ATA_DMA.patch ];
meta.description = "Xen's fork of Seabios";
};
} // optionalAttrs withInternalOVMF {
"firmware/ovmf-dir-remote" = {
src = fetchgit {
url = https://xenbits.xen.org/git-http/ovmf.git;
rev = "cb9a7ebabcd6b8a49dc0854b2f9592d732b5afbd";
sha256 = "07zmdj90zjrzip74fvd4ss8n8njk6cim85s58mc6snxmqqv7gmcq";
};
meta.description = "Xen's fork of OVMF";
};
} // {
# TODO: patch Xen to make this optional?
"firmware/etherboot/ipxe.git" = {
src = fetchgit {
url = https://git.ipxe.org/ipxe.git;
rev = "9a93db3f0947484e30e753bbd61a10b17336e20e";
sha256 = "1ga3h1b34q0cl9azj7j9nswn7mfcs3cgfjdihrm5zkp2xw2hpvr6";
};
meta.description = "Xen's fork of iPXE";
};
} // optionalAttrs withLibHVM {
"xen-libhvm-dir-remote" = {
src = fetchgit {
name = "xen-libhvm";
url = https://github.com/ts468/xen-libhvm;
rev = "442dcc4f6f4e374a51e4613532468bd6b48bdf63";
sha256 = "9ba97c39a00a54c154785716aa06691d312c99be498ebbc00dc3769968178ba8";
};
buildPhase = ''
make
cd biospt
cc -Wall -g -D_LINUX -Wstrict-prototypes biospt.c -o biospt -I../libhvm -L../libhvm -lxenhvm
'';
installPhase = ''
make install
cp biospt/biospt $out/bin/
'';
meta = {
description = ''
Helper library for reading ACPI and SMBIOS firmware values
from the host system for use with the HVM guest firmware
pass-through feature in Xen'';
license = licenses.bsd2;
};
};
};
configureFlags = []
++ optional (!withInternalQemu) "--with-system-qemu" # use qemu from PATH
++ optional (withInternalTraditionalQemu) "--enable-qemu-traditional"
++ optional (!withInternalTraditionalQemu) "--disable-qemu-traditional"
++ optional (withSeabios) "--with-system-seabios=${seabios}"
++ optional (!withInternalSeabios && !withSeabios) "--disable-seabios"
++ optional (withOVMF) "--with-system-ovmf=${OVMF.fd}/FV/OVMF.fd"
++ optional (withInternalOVMF) "--enable-ovmf";
patches =
[ ./0001-libxl-Spice-image-compression-setting-support-for-up.patch
./0002-libxl-Spice-streaming-video-setting-support-for-upst.patch
./0003-Add-qxl-vga-interface-support-for-upstream-qem.patch
(xsaPatch {
name = "190-4.5";
sha256 = "0f8pw38kkxky89ny3ic5h26v9zsjj9id89lygx896zc3w1klafqm";
})
(xsaPatch {
name = "191-4.6";
sha256 = "1wl1ndli8rflmc44pkp8cw4642gi8z7j7gipac8mmlavmn3wdqhg";
})
(xsaPatch {
name = "192-4.5";
sha256 = "0m8cv0xqvx5pdk7fcmaw2vv43xhl62plyx33xqj48y66x5z9lxpm";
})
(xsaPatch {
name = "193-4.5";
sha256 = "0k9mykhrpm4rbjkhv067f6s05lqmgnldcyb3vi8cl0ndlyh66lvr";
})
(xsaPatch {
name = "195";
sha256 = "0m0g953qnjy2knd9qnkdagpvkkgjbk3ydgajia6kzs499dyqpdl7";
})
(xsaPatch {
name = "196-0001-x86-emul-Correct-the-IDT-entry-calculation-in-inject";
sha256 = "0z53nzrjvc745y26z1qc8jlg3blxp7brawvji1hx3s74n346ssl6";
})
(xsaPatch {
name = "196-0002-x86-svm-Fix-injection-of-software-interrupts";
sha256 = "11cqvr5jn2s92wsshpilx9qnfczrd9hnyb5aim6qwmz3fq3hrrkz";
})
(xsaPatch {
name = "198";
sha256 = "0d1nndn4p520c9xa87ixnyks3mrvzcri7c702d6mm22m8ansx6d9";
})
(xsaPatch {
name = "200-4.6";
sha256 = "0k918ja83470iz5k4vqi15293zjvz2dipdhgc9sy9rrhg4mqncl7";
})
(xsaPatch {
name = "202-4.6";
sha256 = "0nnznkrvfbbc8z64dr9wvbdijd4qbpc0wz2j5vpmx6b32sm7932f";
})
(xsaPatch {
name = "204-4.5";
sha256 = "083z9pbdz3f532fnzg7n2d5wzv6rmqc0f4mvc3mnmkd0rzqw8vcp";
})
(xsaPatch {
name = "206-4.5/0001-xenstored-apply-a-write-transaction-rate-limit";
sha256 = "07vsm8mlbxh2s01ny2xywnm1bqhhxas1az31fzwb6f1g14vkzwm4";
})
(xsaPatch {
name = "206-4.5/0002-xenstored-Log-when-the-write-transaction-rate-limit-";
sha256 = "17pnvxjmhny22abwwivacfig4vfsy5bqlki07z236whc2y7yzbsx";
})
(xsaPatch {
name = "206-4.5/0003-oxenstored-refactor-putting-response-on-wire";
sha256 = "0xf566yicnisliy82cydb2s9k27l3bxc43qgmv6yr2ir3ixxlw5s";
})
(xsaPatch {
name = "206-4.5/0004-oxenstored-remove-some-unused-parameters";
sha256 = "16cqx9i0w4w3x06qqdk9rbw4z96yhm0kbc32j40spfgxl82d1zlk";
})
(xsaPatch {
name = "206-4.5/0005-oxenstored-refactor-request-processing";
sha256 = "1g2hzlv7w03sqnifbzda85mwlz3bw37rk80l248180sv3k7k6bgv";
})
(xsaPatch {
name = "206-4.5/0006-oxenstored-keep-track-of-each-transaction-s-operatio";
sha256 = "0n65yfxvpfd4cz95dpbwqj3nablyzq5g7a0klvi2y9zybhch9cmg";
})
(xsaPatch {
name = "206-4.5/0007-oxenstored-move-functions-that-process-simple-operat";
sha256 = "0qllvbc9rnj7jhhlslxxs35gvphvih0ywz52jszj4irm23ka5vnz";
})
(xsaPatch {
name = "206-4.5/0008-oxenstored-replay-transaction-upon-conflict";
sha256 = "0lixkxjfzciy9l0f980cmkr8mcsx14c289kg0mn5w1cscg0hb46g";
})
(xsaPatch {
name = "206-4.5/0009-oxenstored-log-request-and-response-during-transacti";
sha256 = "09ph8ddcx0k7rndd6hx6kszxh3fhxnvdjsq13p97n996xrpl1x7b";
})
(xsaPatch {
name = "206-4.5/0010-oxenstored-allow-compilation-prior-to-OCaml-3.12.0";
sha256 = "1y0m7sqdz89z2vs4dfr45cyvxxas323rxar0xdvvvivgkgxawvxj";
})
(xsaPatch {
name = "206-4.5/0011-oxenstored-comments-explaining-some-variables";
sha256 = "1d3n0y9syya4kaavrvqn01d3wsn85gmw7qrbylkclznqgkwdsr2p";
})
(xsaPatch {
name = "206-4.5/0012-oxenstored-handling-of-domain-conflict-credit";
sha256 = "12zgid5y9vrhhpk2syxp0x01lzzr6447fa76n6rjmzi1xgdzpaf8";
})
(xsaPatch {
name = "206-4.5/0013-oxenstored-ignore-domains-with-no-conflict-credit";
sha256 = "0v3g9pm60w6qi360hdqjcw838s0qcyywz9qpl8gzmhrg7a35avxl";
})
(xsaPatch {
name = "206-4.5/0014-oxenstored-add-transaction-info-relevant-to-history-";
sha256 = "0vv3w0h5xh554i9v2vbc8gzm8wabjf2vzya3dyv5yzvly6ygv0sb";
})
(xsaPatch {
name = "206-4.5/0015-oxenstored-support-commit-history-tracking";
sha256 = "1iv2vy29g437vj73x9p33rdcr5ln2q0kx1b3pgxq202ghbc1x1zj";
})
(xsaPatch {
name = "206-4.5/0016-oxenstored-only-record-operations-with-side-effects-";
sha256 = "1cjkw5ganbg6lq78qsg0igjqvbgph3j349faxgk1p5d6nr492zzy";
})
(xsaPatch {
name = "206-4.5/0017-oxenstored-discard-old-commit-history-on-txn-end";
sha256 = "0lm15lq77403qqwpwcqvxlzgirp6ffh301any9g401hs98f9y4ps";
})
(xsaPatch {
name = "206-4.5/0018-oxenstored-track-commit-history";
sha256 = "1jh92p6vjhkm3bn5vz260npvsjji63g2imsxflxs4f3r69sz1nkd";
})
(xsaPatch {
name = "206-4.5/0019-oxenstored-blame-the-connection-that-caused-a-transa";
sha256 = "17k264pk0fvsamj85578msgpx97mw63nmj0j9v5hbj4bgfazvj4h";
})
(xsaPatch {
name = "206-4.5/0020-oxenstored-allow-self-conflicts";
sha256 = "15z3rd49q0pa72si0s8wjsy2zvbm613d0hjswp4ikc6nzsnsh4qy";
})
(xsaPatch {
name = "206-4.5/0021-oxenstored-do-not-commit-read-only-transactions";
sha256 = "04wpzazhv90lg3228z5i6vnh1z4lzd08z0d0fvc4br6pkd0w4va8";
})
(xsaPatch {
name = "206-4.5/0022-oxenstored-don-t-wake-to-issue-no-conflict-credit";
sha256 = "1shbrn0w68rlywcc633zcgykfccck1a77igmg8ydzwjsbwxsmsjy";
})
(xsaPatch {
name = "206-4.5/0023-oxenstored-transaction-conflicts-improve-logging";
sha256 = "1086y268yh8047k1vxnxs2nhp6izp7lfmq01f1gq5n7jiy1sxcq7";
})
(xsaPatch {
name = "206-4.5/0024-oxenstored-trim-history-in-the-frequent_ops-function";
sha256 = "014zs6i4gzrimn814k5i7gz66vbb0adkzr2qyai7i4fxc9h9r7w8";
})
(xsaPatch {
name = "207";
sha256 = "0wdlhijmw9mdj6a82pyw1rwwiz605dwzjc392zr3fpb2jklrvibc";
})
(xsaPatch {
name = "212";
sha256 = "1ggjbbym5irq534a3zc86md9jg8imlpc9wx8xsadb9akgjrr1r8d";
})
(xsaPatch {
name = "213-4.5";
sha256 = "1vnqf89ydacr5bq3d6z2r33xb2sn5vsd934rncyc28ybc9rvj6wm";
})
(xsaPatch {
name = "214";
sha256 = "0qapzx63z0yl84phnpnglpkxp6b9sy1y7cilhwjhxyigpfnm2rrk";
})
(xsaPatch {
name = "215";
sha256 = "0sv8ccc5xp09f1w1gj5a9n3mlsdsh96sdb1n560vh31f4kkd61xs";
})
(xsaPatch {
name = "217-4.5";
sha256 = "067pgsfrb9py2dhm1pk9g8f6fs40vyfrcxhj8c12vzamb6svzmn4";
})
(xsaPatch {
name = "218-4.5/0001-IOMMU-handle-IOMMU-mapping-and-unmapping-failures";
sha256 = "00y6j3yjxw0igpldsavikmhlxw711k2jsj1qx0s05w2k608gadkq";
})
(xsaPatch {
name = "218-4.5/0002-gnttab-fix-unmap-pin-accounting-race";
sha256 = "0qbbfnnjlpdcd29mzmacfmi859k92c213l91q7w1rg2k6pzx928k";
})
(xsaPatch {
name = "218-4.5/0003-gnttab-Avoid-potential-double-put-of-maptrack-entry";
sha256 = "1cndzvyhf41mk4my6vh3bk9jvh2y4gpmqdhvl9zhxhmppszslqkc";
})
(xsaPatch {
name = "218-4.5/0004-gnttab-correct-maptrack-table-accesses";
sha256 = "02zpb0ffigijacqvyyjylwx3qpgibwslrka7mbxwnclf4s9c03a2";
})
(xsaPatch {
name = "219-4.5";
sha256 = "003msr5vhsc66scmdpgn0lp3p01g4zfw5vj86y5lw9ajkbaywdsm";
})
(xsaPatch {
name = "220-4.5";
sha256 = "1dj9nn6lzxlipjb3nb7b9m4337fl6yn2bd7ap1lqrjn8h9zkk1pp";
})
(xsaPatch {
name = "221";
sha256 = "1mcr1nqgxyjrkywdg7qhlfwgz7vj2if1dhic425vgd41p9cdgl26";
})
(xsaPatch {
name = "222-1-4.6";
sha256 = "1g4dqm5qx4wqlv1520jpfiscph95vllcp4gqp1rdfailk8xi0mcf";
})
(xsaPatch {
name = "222-2-4.5";
sha256 = "1hw8rhc7q4v309f4w11gxfsn5x1pirvxkg7s4kr711fnmvp9hkzd";
})
(xsaPatch {
name = "224-4.5/0001-gnttab-Fix-handling-of-dev_bus_addr-during-unmap";
sha256 = "1aislj66ss4cb3v2bh12mrqsyrf288d4h54rj94jjq7h1hnycw7h";
})
(xsaPatch {
name = "224-4.5/0002-gnttab-never-create-host-mapping-unless-asked-to";
sha256 = "1j6fgm1ccb07gg0mi5qmdr0vqwwc3n12z433g1jrija2gbk1x8aq";
})
(xsaPatch {
name = "224-4.5/0003-gnttab-correct-logic-to-get-page-references-during-m";
sha256 = "166kmicwx280fjqjvgigbmhabjksa0hhvqx5h4v6kjlcjpmxqy08";
})
(xsaPatch {
name = "224-4.5/0004-gnttab-__gnttab_unmap_common_complete-is-all-or-noth";
sha256 = "1skc0yj1zsn8xgyq1y57bdc0scvvlmd0ynrjwwf1zkias1wlilav";
})
];
# Fix build on Glibc 2.24.
NIX_CFLAGS_COMPILE = "-Wno-error=deprecated-declarations";
postPatch = ''
# Avoid a glibc >= 2.25 deprecation warnings that get fatal via -Werror.
sed 1i'#include <sys/sysmacros.h>' \
-i tools/blktap2/control/tap-ctl-allocate.c \
-i tools/libxl/libxl_device.c
'';
})) args