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  1. 07 Oct, 2015 32 commits
  3. 06 Oct, 2015 4 commits
  5. 05 Oct, 2015 4 commits
    • Andrzej Hajda's avatar
      mac80211: make ieee80211_new_mesh_header return unsigned · 5edfcee5
      Andrzej Hajda authored 
      The function returns always non-negative values.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2046107Signed-off-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      5edfcee5
    • Daniel Borkmann's avatar
      ebpf: include perf_event only where really needed · 0cdf5640
      Daniel Borkmann authored 
      Commit ea317b26 ("bpf: Add new bpf map type to store the pointer
to struct perf_event") added perf_event.h to the main eBPF header, so
it gets included for all users. perf_event.h is actually only needed
from array map side, so lets sanitize this a bit.
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Cc: Kaixu Xia <xiakaixu@huawei.com>
Acked-by: default avatarAlexei Starovoitov <ast@plumgrid.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0cdf5640
    • Nicolas Schichan's avatar
      ARM: net: support BPF_ALU | BPF_MOD instructions in the BPF JIT. · 4560cdff
      Nicolas Schichan authored 
      For ARMv7 with UDIV instruction support, generate an UDIV instruction
followed by an MLS instruction.

For other ARM variants, generate code calling a C wrapper similar to
the jit_udiv() function used for BPF_ALU | BPF_DIV instructions.

Some performance numbers reported by the test_bpf module (the duration
per filter run is reported in nanoseconds, between "jitted:<x>" and
"PASS":

ARMv7 QEMU nojit:	test_bpf: #3 DIV_MOD_KX jited:0 2196 PASS
ARMv7 QEMU jit:		test_bpf: #3 DIV_MOD_KX jited:1 104 PASS
ARMv5 QEMU nojit:	test_bpf: #3 DIV_MOD_KX jited:0 2176 PASS
ARMv5 QEMU jit:		test_bpf: #3 DIV_MOD_KX jited:1 1104 PASS
ARMv5 kirkwood nojit:	test_bpf: #3 DIV_MOD_KX jited:0 1103 PASS
ARMv5 kirkwood jit:	test_bpf: #3 DIV_MOD_KX jited:1 311 PASS
Signed-off-by: default avatarNicolas Schichan <nschichan@freebox.fr>
Acked-by: default avatarAlexei Starovoitov <ast@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4560cdff
    • David S. Miller's avatar
      Merge branch 'asix-rx-mem-handling' · df7b6015
      David S. Miller authored 
      Mark Craske says:

====================
Improve ASIX RX memory allocation error handling

The ASIX RX handler algorithm is weak on error handling.
There is a design flaw in the ASIX RX handler algorithm because the
implementation for handling RX Ethernet frames for the DUB-E100 C1 can
have Ethernet frames spanning multiple URBs. This means that payload data
from more than 1 URB is sometimes needed to fill the socket buffer with a
complete Ethernet frame. When the URB with the start of an Ethernet frame
is received then an attempt is made to allocate a socket buffer. If the
memory allocation fails then the algorithm sets the buffer pointer member
to NULL and the function exits (no crash yet). Subsequently, the RX hander
is called again to process the next URB which assumes there is a socket
buffer available and the kernel crashes when there is no buffer.

This patchset implements an improvement to the RX handling algorithm to
avoid a crash when no memory is available for the socket buffer.

The patchset will apply cleanly to the net-next master branch but the
created kernel has not been tested. The driver was tested on ARM kernels
v3.8 and v3.14 for a commercial product.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      df7b6015
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