diff options
| -rw-r--r-- | kernels/linux-libre-lts-knock/PKGBUILD | 24 | ||||
| -rw-r--r-- | kernels/linux-libre-lts-knock/fix_race_condition_in_packet_set_ring.diff | 84 |
2 files changed, 99 insertions, 9 deletions
diff --git a/kernels/linux-libre-lts-knock/PKGBUILD b/kernels/linux-libre-lts-knock/PKGBUILD index 7b3de03ca..c4c29ac2a 100644 --- a/kernels/linux-libre-lts-knock/PKGBUILD +++ b/kernels/linux-libre-lts-knock/PKGBUILD @@ -10,7 +10,7 @@ pkgbase=linux-libre-lts-knock _pkgbasever=4.4-gnu -_pkgver=4.4.35-gnu +_pkgver=4.4.36-gnu _knockpatchver=4.2_2 _replacesarchkernel=('linux%') # '%' gets replaced with _kernelname @@ -28,12 +28,12 @@ license=('GPL2') makedepends=('xmlto' 'docbook-xsl' 'kmod' 'inetutils' 'bc' 'libelf') makedepends_armv7h=('git') options=('!strip') -source=("http://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgbasever}/linux-libre-${_pkgbasever}.tar.xz" - "http://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgbasever}/linux-libre-${_pkgbasever}.tar.xz.sign" - "http://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgver}/patch-${_pkgbasever}-${_pkgver}.xz" - "http://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgver}/patch-${_pkgbasever}-${_pkgver}.xz.sign" - #"http://gnunet.org/sites/default/files/tcp_stealth_${_knockpatchver}.diff" - #"tcp_stealth_${_knockpatchver}.diff.sig::http://gnunet.org/sites/default/files/tcp_stealth_${_knockpatchver%_1}.diff_1.sig" +source=("https://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgbasever}/linux-libre-${_pkgbasever}.tar.xz" + "https://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgbasever}/linux-libre-${_pkgbasever}.tar.xz.sign" + "https://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgver}/patch-${_pkgbasever}-${_pkgver}.xz" + "https://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgver}/patch-${_pkgbasever}-${_pkgver}.xz.sign" + #"https://gnunet.org/sites/default/files/tcp_stealth_${_knockpatchver}.diff" + #"tcp_stealth_${_knockpatchver}.diff.sig::https://gnunet.org/sites/default/files/tcp_stealth_${_knockpatchver%_1}.diff_1.sig" "https://repo.parabola.nu/other/knock/patches/linux-libre/tcp_stealth_${_knockpatchver}.diff" "https://repo.parabola.nu/other/knock/patches/linux-libre/tcp_stealth_${_knockpatchver}.diff.sig" "https://repo.parabola.nu/other/linux-libre/logos/logo_linux_clut224.ppm" @@ -49,6 +49,7 @@ source=("http://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgbasever}/li # standard config files for mkinitcpio ramdisk 'linux.preset' 'change-default-console-loglevel.patch' + 'fix_race_condition_in_packet_set_ring.diff' '0001-sdhci-revert.patch' '0001-drm-radeon-Make-the-driver-load-without-the-firmwares.patch' '0002-usb-serial-gadget-no-TTY-hangup-on-USB-disconnect-WI.patch' @@ -67,7 +68,7 @@ source=("http://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgbasever}/li '0009-ARM-dts-dove-add-Dove-divider-clocks.patch') sha256sums=('f53e99866c751f21412737d1f06b0721e207f495c8c64f97dffb681795ee69a0' 'SKIP' - '43bee4a3ca450e71e392a29f14a33e43c3306132c8912540d0628490a626b5c8' + '09f097bb6827140056d81eb3b46cedc35f0612f07df29a6dc9ec388b3cca83b6' 'SKIP' 'c7c4ab580f00dca4114c185812a963e73217e6bf86406c240d669026dc3f98a4' 'SKIP' @@ -83,11 +84,12 @@ sha256sums=('f53e99866c751f21412737d1f06b0721e207f495c8c64f97dffb681795ee69a0' '834bd254b56ab71d73f59b3221f056c72f559553c04718e350ab2a3e2991afe0' 'ad6344badc91ad0630caacde83f7f9b97276f80d26a20619a87952be65492c65' '1256b241cd477b265a3c2d64bdc19ffe3c9bbcee82ea3994c590c2c76e767d99' + 'ad1ee95f906f88d31fcdb9273cd08e02e8eda177449f0c98dc1bff8cbf1483c2' '5313df7cb5b4d005422bd4cd0dae956b2dadba8f3db904275aaf99ac53894375' 'f0a10ea9a669e5200aa33656565c209718b24ff1add03ac5279c4a1f46ab8798' '96c6c7d4057b8d08238adae85d476c863c082770a182057163a45480511d35a8' '2ca85ee212ef8d8aab3d3c2a0cef304a355d86e7aa520e19471f56ace68a0cf4' - '05b1ffc01a227b0d65759e87f03007a7a89d652cee5937f1fd45741311670033' + '22fa5604cad017b6f623eaf0d247e69c7b0ca77904433bffeed86036a8db3e43' 'SKIP' 'a851312b26800a7e189b34547d5d4b2b62a18874f07335ac6f426c32b47c3817' '486976f36e1919eac5ee984cb9a8d23a972f23f22f8344eda47b487ea91047f4' @@ -150,6 +152,10 @@ prepare() { install -m644 -t drivers/video/logo \ "${srcdir}/logo_linux_"{clut224.ppm,vga16.ppm,mono.pbm} + # fix a race condition that allows to gain root + # https://marc.info/?l=linux-netdev&m=148054660230570&w=2 + patch -p1 -i "${srcdir}/fix_race_condition_in_packet_set_ring.diff" + # add latest fixes from stable queue, if needed # http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git diff --git a/kernels/linux-libre-lts-knock/fix_race_condition_in_packet_set_ring.diff b/kernels/linux-libre-lts-knock/fix_race_condition_in_packet_set_ring.diff new file mode 100644 index 000000000..12048f611 --- /dev/null +++ b/kernels/linux-libre-lts-knock/fix_race_condition_in_packet_set_ring.diff @@ -0,0 +1,84 @@ +From: Philip Pettersson <philip.pettersson@gmail.com> + +When packet_set_ring creates a ring buffer it will initialize a +struct timer_list if the packet version is TPACKET_V3. This value +can then be raced by a different thread calling setsockopt to +set the version to TPACKET_V1 before packet_set_ring has finished. + +This leads to a use-after-free on a function pointer in the +struct timer_list when the socket is closed as the previously +initialized timer will not be deleted. + +The bug is fixed by taking lock_sock(sk) in packet_setsockopt when +changing the packet version while also taking the lock at the start +of packet_set_ring. + +Fixes: f6fb8f100b80 ("af-packet: TPACKET_V3 flexible buffer implementation.") +Signed-off-by: Philip Pettersson <philip.pettersson@gmail.com> +Signed-off-by: Eric Dumazet <edumazet@google.com> +--- + net/packet/af_packet.c | 18 ++++++++++++------ + 1 file changed, 12 insertions(+), 6 deletions(-) + +diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c +index d2238b204691b8e4f2e3acb9bc167b553ba32d50..dd2332390c45bbff7c3fc5d259453f2e1ca352bf 100644 +--- a/net/packet/af_packet.c ++++ b/net/packet/af_packet.c +@@ -3648,19 +3648,25 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv + + if (optlen != sizeof(val)) + return -EINVAL; +- if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) +- return -EBUSY; + if (copy_from_user(&val, optval, sizeof(val))) + return -EFAULT; + switch (val) { + case TPACKET_V1: + case TPACKET_V2: + case TPACKET_V3: +- po->tp_version = val; +- return 0; ++ break; + default: + return -EINVAL; + } ++ lock_sock(sk); ++ if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) { ++ ret = -EBUSY; ++ } else { ++ po->tp_version = val; ++ ret = 0; ++ } ++ release_sock(sk); ++ return ret; + } + case PACKET_RESERVE: + { +@@ -4164,6 +4170,7 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u, + /* Added to avoid minimal code churn */ + struct tpacket_req *req = &req_u->req; + ++ lock_sock(sk); + /* Opening a Tx-ring is NOT supported in TPACKET_V3 */ + if (!closing && tx_ring && (po->tp_version > TPACKET_V2)) { + net_warn_ratelimited("Tx-ring is not supported.\n"); +@@ -4245,7 +4252,6 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u, + goto out; + } + +- lock_sock(sk); + + /* Detach socket from network */ + spin_lock(&po->bind_lock); +@@ -4294,11 +4300,11 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u, + if (!tx_ring) + prb_shutdown_retire_blk_timer(po, rb_queue); + } +- release_sock(sk); + + if (pg_vec) + free_pg_vec(pg_vec, order, req->tp_block_nr); + out: ++ release_sock(sk); + return err; + } |