Alexei Starovoitov 67ba9818b3 x86: bpf_jit: fix compilation of large bpf programs ... commit 3f7352bf21f8fd7ba3e2fcef9488756f188e12be upstream. x86 has variable length encoding. x86 JIT compiler is trying to pick the shortest encoding for given bpf instruction. While doing so the jump targets are changing, so JIT is doing multiple passes over the program. Typical program needs 3 passes. Some very short programs converge with 2 passes. Large programs may need 4 or 5. But specially crafted bpf programs may hit the pass limit and if the program converges on the last iteration the JIT compiler will be producing an image full of 'int 3' insns. Fix this corner case by doing final iteration over bpf program. Fixes: 0a14842f5a ("net: filter: Just In Time compiler for x86-64") Reported-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Tested-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net> [lizf: Backported to 3.4: adjust context] Signed-off-by: Zefan Li <lizefan@huawei.com>		2015-09-18 09:20:42 +08:00
..
boot	x86, build: Pass in additional -mno-mmx, -mno-sse options	2014-06-07 16:02:08 -07:00
configs
crypto	crypto: aesni - fix memory usage in GCM decryption	2015-06-19 11:40:28 +08:00
ia32
include/asm	x86/iommu: Fix header comments regarding standard and _FINISH macros	2015-09-18 09:20:28 +08:00
kernel	x86/mce: Fix MCE severity messages	2015-09-18 09:20:42 +08:00
kvm	KVM: MMU: fix CR4.SMEP=1, CR0.WP=0 with shadow pages	2015-09-18 09:20:40 +08:00
lguest
lib
math-emu
mm	x86, mm/ASLR: Fix stack randomization on 64-bit systems	2015-04-14 17:33:58 +08:00
net	x86: bpf_jit: fix compilation of large bpf programs	2015-09-18 09:20:42 +08:00
oprofile
pci
platform	x86/efi: Fix dummy variable buffer allocation	2014-06-07 16:02:10 -07:00
power
syscalls	x86, x32: Use compat shims for io_{setup,submit}	2014-06-30 20:01:33 -07:00
tools
um	x86, um: actually mark system call tables readonly	2015-04-14 17:33:49 +08:00
vdso	x86/vdso: Fix the build on GCC5	2015-06-19 11:40:25 +08:00
video
xen	xen/smp/spinlock: Fix leakage of the spinlock interrupt line for every CPU online/offline	2014-03-11 16:10:06 -07:00
.gitignore
Kbuild
Kconfig	config: Enable NEED_DMA_MAP_STATE by default when SWIOTLB is selected	2015-06-19 11:40:34 +08:00
Kconfig.cpu
Kconfig.debug
Makefile
Makefile.um
Makefile_32.cpu