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7891a87efc
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Daniel Borkmann 7891a87efc bpf: arsh is not supported in 32 bit alu thus reject it 
The following snippet was throwing an 'unknown opcode cc' warning
in BPF interpreter:

  0: (18) r0 = 0x0
  2: (7b) *(u64 *)(r10 -16) = r0
  3: (cc) (u32) r0 s>>= (u32) r0
  4: (95) exit

Although a number of JITs do support BPF_ALU | BPF_ARSH | BPF_{K,X}
generation, not all of them do and interpreter does neither. We can
leave existing ones and implement it later in bpf-next for the
remaining ones, but reject this properly in verifier for the time
being.

Fixes: 17a5267067 ("bpf: verifier (add verifier core)")
Reported-by: syzbot+93c4904c5c70348a6890@syzkaller.appspotmail.com
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-01-10 14:42:22 -08:00
..
accounting License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
arch Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-12-31 11:47:24 -08:00
bpf tools: bpftool: protect against races with disappearing objects 2017-12-23 01:09:52 +01:00
build License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cgroup License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
firewire License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gpio This is the bulk of GPIO changes for the v4.15 kernel cycle: 2017-11-14 17:23:44 -08:00
hv hv: kvp: Avoid reading past allocated blocks from KVP file 2017-11-28 16:56:26 +01:00
iio License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
include Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-12-15 13:08:37 -08:00
kvm/kvm_stat tools/kvm_stat: sort '-f help' output 2017-12-21 13:03:32 +01:00
laptop License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
leds License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
lib tools/lib/traceevent/parse-filter.c: clean up clang build warning 2017-11-17 16:10:02 -08:00
nfsd License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
objtool objtool: Fix seg fault with clang-compiled objects 2017-12-30 22:04:17 +01:00
pci License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pcmcia License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf tools arch s390: Do not include header files from the kernel sources 2017-12-18 11:56:13 -03:00
power Power management fixes for v4.15-rc2 2017-11-30 18:45:55 -05:00
scripts kbuild: /bin/pwd -> pwd 2017-11-18 11:32:27 +09:00
spi License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
testing bpf: arsh is not supported in 32 bit alu thus reject it 2018-01-10 14:42:22 -08:00
thermal/tmon Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2017-11-17 14:31:27 -08:00
time
usb usbip: fix usbip bind writing random string after command in match_busid 2017-12-19 11:40:55 +01:00
virtio virtio: regression fixes 2017-12-15 12:56:23 -08:00
vm tools/slabinfo-gnuplot: force to use bash shell 2017-12-14 16:00:48 -08:00
wmi tools/wmi: add a sample for dell smbios communication over WMI 2017-11-03 16:34:00 -07:00
Makefile platform-drivers-x86 for v4.15-1 2017-11-18 10:26:57 -08:00