--- /dev/null
+From 895162b1101b3ea5db08ca6822ae9672717efec0 Mon Sep 17 00:00:00 2001
+From: Florian Westphal <fw@strlen.de>
+Date: Fri, 2 May 2014 15:32:16 +0200
+Subject: netfilter: ipv4: defrag: set local_df flag on defragmented skb
+
+From: Florian Westphal <fw@strlen.de>
+
+commit 895162b1101b3ea5db08ca6822ae9672717efec0 upstream.
+
+else we may fail to forward skb even if original fragments do fit
+outgoing link mtu:
+
+1. remote sends 2k packets in two 1000 byte frags, DF set
+2. we want to forward but only see '2k > mtu and DF set'
+3. we then send icmp error saying that outgoing link is 1500
+
+But original sender never sent a packet that would not fit
+the outgoing link.
+
+Setting local_df makes outgoing path test size vs.
+IPCB(skb)->frag_max_size, so we will still send the correct
+error in case the largest original size did not fit
+outgoing link mtu.
+
+Reported-by: Maxime Bizon <mbizon@freebox.fr>
+Suggested-by: Maxime Bizon <mbizon@freebox.fr>
+Fixes: 5f2d04f1f9 (ipv4: fix path MTU discovery with connection tracking)
+Signed-off-by: Florian Westphal <fw@strlen.de>
+Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
+Cc: Jiri Slaby <jslaby@suse.cz>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ net/ipv4/netfilter/nf_defrag_ipv4.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+--- a/net/ipv4/netfilter/nf_defrag_ipv4.c
++++ b/net/ipv4/netfilter/nf_defrag_ipv4.c
+@@ -22,7 +22,6 @@
+ #endif
+ #include <net/netfilter/nf_conntrack_zones.h>
+
+-/* Returns new sk_buff, or NULL */
+ static int nf_ct_ipv4_gather_frags(struct sk_buff *skb, u_int32_t user)
+ {
+ int err;
+@@ -33,8 +32,10 @@ static int nf_ct_ipv4_gather_frags(struc
+ err = ip_defrag(skb, user);
+ local_bh_enable();
+
+- if (!err)
++ if (!err) {
+ ip_send_check(ip_hdr(skb));
++ skb->local_df = 1;
++ }
+
+ return err;
+ }
--- /dev/null
+From 7998eb3dc700aaf499f93f50b3d77da834ef9e1d Mon Sep 17 00:00:00 2001
+From: Guenter Roeck <linux@roeck-us.net>
+Date: Thu, 15 May 2014 09:33:42 -0700
+Subject: powerpc: Fix 64 bit builds with binutils 2.24
+
+From: Guenter Roeck <linux@roeck-us.net>
+
+commit 7998eb3dc700aaf499f93f50b3d77da834ef9e1d upstream.
+
+With binutils 2.24, various 64 bit builds fail with relocation errors
+such as
+
+arch/powerpc/kernel/built-in.o: In function `exc_debug_crit_book3e':
+ (.text+0x165ee): relocation truncated to fit: R_PPC64_ADDR16_HI
+ against symbol `interrupt_base_book3e' defined in .text section
+ in arch/powerpc/kernel/built-in.o
+arch/powerpc/kernel/built-in.o: In function `exc_debug_crit_book3e':
+ (.text+0x16602): relocation truncated to fit: R_PPC64_ADDR16_HI
+ against symbol `interrupt_end_book3e' defined in .text section
+ in arch/powerpc/kernel/built-in.o
+
+The assembler maintainer says:
+
+ I changed the ABI, something that had to be done but unfortunately
+ happens to break the booke kernel code. When building up a 64-bit
+ value with lis, ori, shl, oris, ori or similar sequences, you now
+ should use @high and @higha in place of @h and @ha. @h and @ha
+ (and their associated relocs R_PPC64_ADDR16_HI and R_PPC64_ADDR16_HA)
+ now report overflow if the value is out of 32-bit signed range.
+ ie. @h and @ha assume you're building a 32-bit value. This is needed
+ to report out-of-range -mcmodel=medium toc pointer offsets in @toc@h
+ and @toc@ha expressions, and for consistency I did the same for all
+ other @h and @ha relocs.
+
+Replacing @h with @high in one strategic location fixes the relocation
+errors. This has to be done conditionally since the assembler either
+supports @h or @high but not both.
+
+Signed-off-by: Guenter Roeck <linux@roeck-us.net>
+Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/powerpc/Makefile | 4 +++-
+ arch/powerpc/include/asm/ppc_asm.h | 7 ++++++-
+ 2 files changed, 9 insertions(+), 2 deletions(-)
+
+--- a/arch/powerpc/Makefile
++++ b/arch/powerpc/Makefile
+@@ -67,9 +67,11 @@ LDFLAGS_vmlinux-y := -Bstatic
+ LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
+ LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
+
++asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
++
+ CFLAGS-$(CONFIG_PPC64) := -mminimal-toc -mtraceback=no -mcall-aixdesc
+ CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 -mmultiple
+-KBUILD_CPPFLAGS += -Iarch/$(ARCH)
++KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
+ KBUILD_AFLAGS += -Iarch/$(ARCH)
+ KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
+ CPP = $(CC) -E $(KBUILD_CFLAGS)
+--- a/arch/powerpc/include/asm/ppc_asm.h
++++ b/arch/powerpc/include/asm/ppc_asm.h
+@@ -294,11 +294,16 @@ n:
+ * ld rY,ADDROFF(name)(rX)
+ */
+ #ifdef __powerpc64__
++#ifdef HAVE_AS_ATHIGH
++#define __AS_ATHIGH high
++#else
++#define __AS_ATHIGH h
++#endif
+ #define LOAD_REG_IMMEDIATE(reg,expr) \
+ lis (reg),(expr)@highest; \
+ ori (reg),(reg),(expr)@higher; \
+ rldicr (reg),(reg),32,31; \
+- oris (reg),(reg),(expr)@h; \
++ oris (reg),(reg),(expr)@__AS_ATHIGH; \
+ ori (reg),(reg),(expr)@l;
+
+ #define LOAD_REG_ADDR(reg,name) \
projects / thirdparty / kernel / stable-queue.git / commitdiff
