linux-stable.git/tools, branch v5.4.36

tools/vm: fix cross-compile build

2020-04-29T14:33:15+00:00

commit cf01699ee220c38099eb3e43ce3d10690c8b7060 upstream.

Commit 7ed1c1901fe5 ("tools: fix cross-compile var clobbering") moved
the setup of the CC variable to tools/scripts/Makefile.include to make
the behavior consistent across all the tools Makefiles.

As the vm tools missed the include we end up with the wrong CC in a
cross-compiling evironment.

Fixes: 7ed1c1901fe5 (tools: fix cross-compile var clobbering)
Signed-off-by: Lucas Stach 
Signed-off-by: Andrew Morton 
Cc: Martin Kelly 
Cc: 
Link: http://lkml.kernel.org/r/20200416104748.25243-1-l.stach@pengutronix.de
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

selftests: Fix suppress test in fib_tests.sh

2020-04-29T14:33:09+00:00

[ Upstream commit 2c1dd4c110627c2a4f006643f074119205cfcff4 ]

fib_tests is spewing errors:
    ...
    Cannot open network namespace "ns1": No such file or directory
    Cannot open network namespace "ns1": No such file or directory
    Cannot open network namespace "ns1": No such file or directory
    Cannot open network namespace "ns1": No such file or directory
    ping: connect: Network is unreachable
    Cannot open network namespace "ns1": No such file or directory
    Cannot open network namespace "ns1": No such file or directory
    ...

Each test entry in fib_tests is supposed to do its own setup and
cleanup. Right now the $IP commands in fib_suppress_test are
failing because there is no ns1. Add the setup/cleanup and logging
expected for each test.

Fixes: ca7a03c41753 ("ipv6: do not free rt if FIB_LOOKUP_NOREF is set on suppress rule")
Signed-off-by: David Ahern 
Cc: Jason A. Donenfeld 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

ipv4: Update fib_select_default to handle nexthop objects

2020-04-29T14:33:07+00:00

[ Upstream commit 7c74b0bec918c1e0ca0b4208038c156eacf8f13f ]

A user reported [0] hitting the WARN_ON in fib_info_nh:

    [ 8633.839816] ------------[ cut here ]------------
    [ 8633.839819] WARNING: CPU: 0 PID: 1719 at include/net/nexthop.h:251 fib_select_path+0x303/0x381
    ...
    [ 8633.839846] RIP: 0010:fib_select_path+0x303/0x381
    ...
    [ 8633.839848] RSP: 0018:ffffb04d407f7d00 EFLAGS: 00010286
    [ 8633.839850] RAX: 0000000000000000 RBX: ffff9460b9897ee8 RCX: 00000000000000fe
    [ 8633.839851] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
    [ 8633.839852] RBP: ffff946076049850 R08: 0000000059263a83 R09: ffff9460840e4000
    [ 8633.839853] R10: 0000000000000014 R11: 0000000000000000 R12: ffffb04d407f7dc0
    [ 8633.839854] R13: ffffffffa4ce3240 R14: 0000000000000000 R15: ffff9460b7681f60
    [ 8633.839857] FS:  00007fcac2e02700(0000) GS:ffff9460bdc00000(0000) knlGS:0000000000000000
    [ 8633.839858] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    [ 8633.839859] CR2: 00007f27beb77e28 CR3: 0000000077734000 CR4: 00000000000006f0
    [ 8633.839867] Call Trace:
    [ 8633.839871]  ip_route_output_key_hash_rcu+0x421/0x890
    [ 8633.839873]  ip_route_output_key_hash+0x5e/0x80
    [ 8633.839876]  ip_route_output_flow+0x1a/0x50
    [ 8633.839878]  __ip4_datagram_connect+0x154/0x310
    [ 8633.839880]  ip4_datagram_connect+0x28/0x40
    [ 8633.839882]  __sys_connect+0xd6/0x100
    ...

The WARN_ON is triggered in fib_select_default which is invoked when
there are multiple default routes. Update the function to use
fib_info_nhc and convert the nexthop checks to use fib_nh_common.

Add test case that covers the affected code path.

[0] https://github.com/FRRouting/frr/issues/6089

Fixes: 493ced1ac47c ("ipv4: Allow routes to use nexthop objects")
Signed-off-by: David Ahern 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

tracing/selftests: Turn off timeout setting

2020-04-29T14:33:05+00:00

[ Upstream commit b43e78f65b1d35fd3e13c7b23f9b64ea83c9ad3a ]

As the ftrace selftests can run for a long period of time, disable the
timeout that the general selftests have. If a selftest hangs, then it
probably means the machine will hang too.

Link: https://lore.kernel.org/r/alpine.LSU.2.21.1911131604170.18679@pobox.suse.cz

Suggested-by: Miroslav Benes 
Tested-by: Miroslav Benes 
Reviewed-by: Miroslav Benes 
Signed-off-by: Steven Rostedt (VMware) 
Signed-off-by: Sasha Levin

libbpf: Fix readelf output parsing on powerpc with recent binutils

2020-04-29T14:33:04+00:00

[ Upstream commit 3464afdf11f9a1e031e7858a05351ceca1792fea ]

On powerpc with recent versions of binutils, readelf outputs an extra
field when dumping the symbols of an object file. For example:

    35: 0000000000000838    96 FUNC    LOCAL  DEFAULT [: 8]     1 btf_is_struct

The extra "[: 8]" prevents the GLOBAL_SYM_COUNT variable to
be computed correctly and causes the check_abi target to fail.

Fix that by looking for the symbol name in the last field instead of the
8th one. This way it should also cope with future extra fields.

Signed-off-by: Aurelien Jarno 
Signed-off-by: Daniel Borkmann 
Tested-by: Michael Ellerman 
Link: https://lore.kernel.org/bpf/20191201195728.4161537-1-aurelien@aurel32.net
Signed-off-by: Sasha Levin

selftests: kmod: fix handling test numbers above 9

2020-04-29T14:33:00+00:00

[ Upstream commit 6d573a07528308eb77ec072c010819c359bebf6e ]

get_test_count() and get_test_enabled() were broken for test numbers
above 9 due to awk interpreting a field specification like '$0010' as
octal rather than decimal.  Fix it by stripping the leading zeroes.

Signed-off-by: Eric Biggers 
Signed-off-by: Andrew Morton 
Acked-by: Luis Chamberlain 
Cc: Alexei Starovoitov 
Cc: Greg Kroah-Hartman 
Cc: Jeff Vander Stoep 
Cc: Jessica Yu 
Cc: Kees Cook 
Cc: NeilBrown 
Link: http://lkml.kernel.org/r/20200318230515.171692-5-ebiggers@kernel.org
Signed-off-by: Linus Torvalds 
Signed-off-by: Sasha Levin

tools/test/nvdimm: Fix out of tree build

2020-04-29T14:32:59+00:00

[ Upstream commit 1f776799628139d0da47e710ad86eb58d987ff66 ]

Out of tree build using

   make M=tools/test/nvdimm O=/tmp/build -C /tmp/build

fails with the following error

make: Entering directory '/tmp/build'
  CC [M]  tools/testing/nvdimm/test/nfit.o
linux/tools/testing/nvdimm/test/nfit.c:19:10: fatal error: nd-core.h: No such file or directory
   19 | #include 
      |          ^~~~~~~~~~~
compilation terminated.

That is because the kbuild file uses $(src) which points to
tools/testing/nvdimm, $(srctree) correctly points to root of the linux
source tree.

Reported-by: Aneesh Kumar K.V 
Signed-off-by: Santosh Sivaraj 
Link: https://lore.kernel.org/r/20200114054051.4115790-1-santosh@fossix.org
Signed-off-by: Dan Williams 
Signed-off-by: Sasha Levin

tools/testing/nvdimm: Fix compilation failure without CONFIG_DEV_DAX_PMEM_COMPAT

2020-04-29T14:32:57+00:00

[ Upstream commit c0e71d602053e4e7637e4bc7d0bc9603ea77a33f ]

When a kernel is configured without CONFIG_DEV_DAX_PMEM_COMPAT, the
compilation of tools/testing/nvdimm fails with:

  Building modules, stage 2.
  MODPOST 11 modules
ERROR: "dax_pmem_compat_test" [tools/testing/nvdimm/test/nfit_test.ko] undefined!

Fix the problem by calling dax_pmem_compat_test() only if the kernel has
the required functionality.

Signed-off-by: Jan Kara 
Link: https://lore.kernel.org/r/20200123154720.12097-1-jack@suse.cz
Signed-off-by: Dan Williams 
Signed-off-by: Sasha Levin

bpf, test_verifier: switch bpf_get_stack's 0 s> r8 test

2020-04-23T08:36:46+00:00

[ no upstream commit ]

Switch the comparison, so that is_branch_taken() will recognize that below
branch is never taken:

  [...]
  17: [...] R1_w=inv0 [...] R8_w=inv(id=0,smin_value=-2147483648,smax_value=-1,umin_value=18446744071562067968,var_off=(0xffffffff80000000; 0x7fffffff)) [...]
  17: (67) r8 <<= 32
  18: [...] R8_w=inv(id=0,smax_value=-4294967296,umin_value=9223372036854775808,umax_value=18446744069414584320,var_off=(0x8000000000000000; 0x7fffffff00000000)) [...]
  18: (c7) r8 s>>= 32
  19: [...] R8_w=inv(id=0,smin_value=-2147483648,smax_value=-1,umin_value=18446744071562067968,var_off=(0xffffffff80000000; 0x7fffffff)) [...]
  19: (6d) if r1 s> r8 goto pc+16
  [...] R1_w=inv0 [...] R8_w=inv(id=0,smin_value=-2147483648,smax_value=-1,umin_value=18446744071562067968,var_off=(0xffffffff80000000; 0x7fffffff)) [...]
  [...]

Currently we check for is_branch_taken() only if either K is source, or source
is a scalar value that is const. For upstream it would be good to extend this
properly to check whether dst is const and src not.

For the sake of the test_verifier, it is probably not needed here:

  # ./test_verifier 101
  #101/p bpf_get_stack return R0 within range OK
  Summary: 1 PASSED, 0 SKIPPED, 0 FAILED

I haven't seen this issue in test_progs* though, they are passing fine:

  # ./test_progs-no_alu32 -t get_stack
  Switching to flavor 'no_alu32' subdirectory...
  #20 get_stack_raw_tp:OK
  Summary: 1/0 PASSED, 0 SKIPPED, 0 FAILED

  # ./test_progs -t get_stack
  #20 get_stack_raw_tp:OK
  Summary: 1/0 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann 
Acked-by: Alexei Starovoitov 
Acked-by: John Fastabend 
Signed-off-by: Greg Kroah-Hartman

bpf: Test_progs, add test to catch retval refine error handling

2020-04-23T08:36:46+00:00

commit d2db08c7a14e0b5eed6132baf258b80622e041a9 upstream.

Before this series the verifier would clamp return bounds of
bpf_get_stack() to [0, X] and this led the verifier to believe
that a JMP_JSLT 0 would be false and so would prune that path.

The result is anything hidden behind that JSLT would be unverified.
Add a test to catch this case by hiding an goto pc-1 behind the
check which will cause an infinite loop if not rejected.

Signed-off-by: John Fastabend 
Signed-off-by: Alexei Starovoitov 
Link: https://lore.kernel.org/bpf/158560423908.10843.11783152347709008373.stgit@john-Precision-5820-Tower
Signed-off-by: Daniel Borkmann 
Signed-off-by: Greg Kroah-Hartman