diff options
4 files changed, 147 insertions, 92 deletions
diff --git a/kernels/linux-libre-pae/0001-x86-fpu-Fix-invalid-FPU-ptrace-state-after-execve.patch b/kernels/linux-libre-pae/0001-x86-fpu-Fix-invalid-FPU-ptrace-state-after-execve.patch new file mode 100644 index 000000000..8cef84635 --- /dev/null +++ b/kernels/linux-libre-pae/0001-x86-fpu-Fix-invalid-FPU-ptrace-state-after-execve.patch @@ -0,0 +1,65 @@ +From 885bad1e5f32bbf30787ead9578f8174047e6904 Mon Sep 17 00:00:00 2001 +From: Yu-cheng Yu <yu-cheng.yu@intel.com> +Date: Thu, 17 Nov 2016 09:11:35 -0800 +Subject: [PATCH] x86/fpu: Fix invalid FPU ptrace state after execve() + +commit b22cbe404a9cc3c7949e380fa1861e31934c8978 upstream. + +Robert O'Callahan reported that after an execve PTRACE_GETREGSET +NT_X86_XSTATE continues to return the pre-exec register values +until the exec'ed task modifies FPU state. + +The test code is at: + + https://bugzilla.redhat.com/attachment.cgi?id=1164286. + +What is happening is fpu__clear() does not properly clear fpstate. +Fix it by doing just that. + +Reported-by: Robert O'Callahan <robert@ocallahan.org> +Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com> +Cc: Andy Lutomirski <luto@kernel.org> +Cc: Borislav Petkov <bp@suse.de> +Cc: David Hansen <dave.hansen@linux.intel.com> +Cc: Fenghua Yu <fenghua.yu@intel.com> +Cc: Linus Torvalds <torvalds@linux-foundation.org> +Cc: Peter Zijlstra <peterz@infradead.org> +Cc: Ravi V. Shankar <ravi.v.shankar@intel.com> +Cc: Thomas Gleixner <tglx@linutronix.de> +Link: http://lkml.kernel.org/r/1479402695-6553-1-git-send-email-yu-cheng.yu@intel.com +Signed-off-by: Ingo Molnar <mingo@kernel.org> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + arch/x86/kernel/fpu/core.c | 16 ++++++++-------- + 1 file changed, 8 insertions(+), 8 deletions(-) + +diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c +index 3fc03a09a93b1710..c289e2f4a6e5b464 100644 +--- a/arch/x86/kernel/fpu/core.c ++++ b/arch/x86/kernel/fpu/core.c +@@ -517,14 +517,14 @@ void fpu__clear(struct fpu *fpu) + { + WARN_ON_FPU(fpu != ¤t->thread.fpu); /* Almost certainly an anomaly */ + +- if (!use_eager_fpu() || !static_cpu_has(X86_FEATURE_FPU)) { +- /* FPU state will be reallocated lazily at the first use. */ +- fpu__drop(fpu); +- } else { +- if (!fpu->fpstate_active) { +- fpu__activate_curr(fpu); +- user_fpu_begin(); +- } ++ fpu__drop(fpu); ++ ++ /* ++ * Make sure fpstate is cleared and initialized. ++ */ ++ if (static_cpu_has(X86_FEATURE_FPU)) { ++ fpu__activate_curr(fpu); ++ user_fpu_begin(); + copy_init_fpstate_to_fpregs(); + } + } +-- +2.10.2 + diff --git a/kernels/linux-libre-pae/PKGBUILD b/kernels/linux-libre-pae/PKGBUILD index aae5c2f4c..d7b66299c 100644 --- a/kernels/linux-libre-pae/PKGBUILD +++ b/kernels/linux-libre-pae/PKGBUILD @@ -9,7 +9,7 @@ pkgbase=linux-libre-pae _pkgbasever=4.8-gnu -_pkgver=4.8.12-gnu +_pkgver=4.8.14-gnu _replacesarchkernel=('linux%') # '%' gets replaced with _kernelname _replacesoldkernels=() # '%' gets replaced with _kernelname @@ -18,7 +18,7 @@ _replacesoldmodules=() # '%' gets replaced with _kernelname _srcname=linux-${_pkgbasever%-*} _archpkgver=${_pkgver%-*} pkgver=${_pkgver//-/_} -pkgrel=2 +pkgrel=1 arch=('i686') url="https://linux-libre.fsfla.org/" license=('GPL2') @@ -41,12 +41,13 @@ source=("https://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgbasever}/l # standard config files for mkinitcpio ramdisk 'linux.preset' 'change-default-console-loglevel.patch' - 'fix_race_condition_in_packet_set_ring.diff' + 'net_handle_no_dst_on_skb_in_icmp6_send.patch' + '0001-x86-fpu-Fix-invalid-FPU-ptrace-state-after-execve.patch' '0001-usb-serial-gadget-no-TTY-hangup-on-USB-disconnect-WI.patch' '0002-fix-Atmel-maXTouch-touchscreen-support.patch') sha256sums=('d54e0f8a27e24f3666c19b395c19dba194635db26929c89e78ffa4b2b0e8ca3a' 'SKIP' - '2305f73842bf41755c082900694d2f756787a9d5f7c37fd6a8ec387405e944ae' + '8f0b878ba934bd11e2297653fe6b7a38058d6a8d5ae223713070744822851b0c' 'SKIP' 'bfd4a7f61febe63c880534dcb7c31c5b932dde6acf991810b41a939a93535494' 'SKIP' @@ -58,7 +59,8 @@ sha256sums=('d54e0f8a27e24f3666c19b395c19dba194635db26929c89e78ffa4b2b0e8ca3a' '834bd254b56ab71d73f59b3221f056c72f559553c04718e350ab2a3e2991afe0' 'ad6344badc91ad0630caacde83f7f9b97276f80d26a20619a87952be65492c65' '1256b241cd477b265a3c2d64bdc19ffe3c9bbcee82ea3994c590c2c76e767d99' - 'ad1ee95f906f88d31fcdb9273cd08e02e8eda177449f0c98dc1bff8cbf1483c2' + 'b595a1588bafb3d732841cd1b73633970706914f57f2d215c9f1494212d13989' + '3e955e0f1aae96bb6c1507236adc952640c9bd0a134b9995ab92106a33dc02d9' '0376bd5efa31d4e2a9d52558777cebd9f0941df8e1adab916c868bf0c05f2fc3' '351fd96be8cd5ebd0435c0a8a978673fc023e3b1026085e67f86d815b2285e25') validpgpkeys=( @@ -85,9 +87,13 @@ 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" + # https://bugzilla.kernel.org/show_bug.cgi?id=189851 + patch -p1 -i "${srcdir}/net_handle_no_dst_on_skb_in_icmp6_send.patch" + + # Revert a commit that causes memory corruption in i686 chroots + # ("valgrind bash" immediately crashes) + # https://bugzilla.kernel.org/show_bug.cgi?id=190061 + patch -Rp1 -i "${srcdir}/0001-x86-fpu-Fix-invalid-FPU-ptrace-state-after-execve.patch" # 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-pae/fix_race_condition_in_packet_set_ring.diff b/kernels/linux-libre-pae/fix_race_condition_in_packet_set_ring.diff deleted file mode 100644 index 12048f611..000000000 --- a/kernels/linux-libre-pae/fix_race_condition_in_packet_set_ring.diff +++ /dev/null @@ -1,84 +0,0 @@ -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; - } diff --git a/kernels/linux-libre-pae/net_handle_no_dst_on_skb_in_icmp6_send.patch b/kernels/linux-libre-pae/net_handle_no_dst_on_skb_in_icmp6_send.patch new file mode 100644 index 000000000..06448a90a --- /dev/null +++ b/kernels/linux-libre-pae/net_handle_no_dst_on_skb_in_icmp6_send.patch @@ -0,0 +1,68 @@ +From 79dc7e3f1cd323be4c81aa1a94faa1b3ed987fb2 Mon Sep 17 00:00:00 2001 +From: David Ahern <dsa@cumulusnetworks.com> +Date: Sun, 27 Nov 2016 18:52:53 -0800 +Subject: [PATCH] net: handle no dst on skb in icmp6_send + +Andrey reported the following while fuzzing the kernel with syzkaller: + +kasan: CONFIG_KASAN_INLINE enabled +kasan: GPF could be caused by NULL-ptr deref or user memory access +general protection fault: 0000 [#1] SMP KASAN +Modules linked in: +CPU: 0 PID: 3859 Comm: a.out Not tainted 4.9.0-rc6+ #429 +Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 +task: ffff8800666d4200 task.stack: ffff880067348000 +RIP: 0010:[<ffffffff833617ec>] [<ffffffff833617ec>] +icmp6_send+0x5fc/0x1e30 net/ipv6/icmp.c:451 +RSP: 0018:ffff88006734f2c0 EFLAGS: 00010206 +RAX: ffff8800666d4200 RBX: 0000000000000000 RCX: 0000000000000000 +RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000018 +RBP: ffff88006734f630 R08: ffff880064138418 R09: 0000000000000003 +R10: dffffc0000000000 R11: 0000000000000005 R12: 0000000000000000 +R13: ffffffff84e7e200 R14: ffff880064138484 R15: ffff8800641383c0 +FS: 00007fb3887a07c0(0000) GS:ffff88006cc00000(0000) knlGS:0000000000000000 +CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 +CR2: 0000000020000000 CR3: 000000006b040000 CR4: 00000000000006f0 +Stack: + ffff8800666d4200 ffff8800666d49f8 ffff8800666d4200 ffffffff84c02460 + ffff8800666d4a1a 1ffff1000ccdaa2f ffff88006734f498 0000000000000046 + ffff88006734f440 ffffffff832f4269 ffff880064ba7456 0000000000000000 +Call Trace: + [<ffffffff83364ddc>] icmpv6_param_prob+0x2c/0x40 net/ipv6/icmp.c:557 + [< inline >] ip6_tlvopt_unknown net/ipv6/exthdrs.c:88 + [<ffffffff83394405>] ip6_parse_tlv+0x555/0x670 net/ipv6/exthdrs.c:157 + [<ffffffff8339a759>] ipv6_parse_hopopts+0x199/0x460 net/ipv6/exthdrs.c:663 + [<ffffffff832ee773>] ipv6_rcv+0xfa3/0x1dc0 net/ipv6/ip6_input.c:191 + ... + +icmp6_send / icmpv6_send is invoked for both rx and tx paths. In both +cases the dst->dev should be preferred for determining the L3 domain +if the dst has been set on the skb. Fallback to the skb->dev if it has +not. This covers the case reported here where icmp6_send is invoked on +Rx before the route lookup. + +Fixes: 5d41ce29e ("net: icmp6_send should use dst dev to determine L3 domain") +Reported-by: Andrey Konovalov <andreyknvl@google.com> +Signed-off-by: David Ahern <dsa@cumulusnetworks.com> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + net/ipv6/icmp.c | 6 ++++-- + 1 file changed, 4 insertions(+), 2 deletions(-) + +diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c +index 7370ad2..2772004 100644 +--- a/net/ipv6/icmp.c ++++ b/net/ipv6/icmp.c +@@ -447,8 +447,10 @@ static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info, + + if (__ipv6_addr_needs_scope_id(addr_type)) + iif = skb->dev->ifindex; +- else +- iif = l3mdev_master_ifindex(skb_dst(skb)->dev); ++ else { ++ dst = skb_dst(skb); ++ iif = l3mdev_master_ifindex(dst ? dst->dev : skb->dev); ++ } + + /* + * Must not send error if the source does not uniquely |