linux-stable.git/tools, branch v4.19.12

tools/testing/nvdimm: Align test resources to 128M

2018-12-21T13:15:23+00:00

[ Upstream commit e3f5df762d4a6ef6326c3c09bc9f89ea8a2eab2c ]

In preparation for libnvdimm growing new restrictions to detect section
conflicts between persistent memory regions, enable nfit_test to
allocate aligned resources. Use a gen_pool to allocate nfit_test's fake
resources in a separate address space from the virtual translation of
the same.

Reviewed-by: Vishal Verma 
Tested-by: Vishal Verma 
Signed-off-by: Dan Williams 
Signed-off-by: Sasha Levin

bpf: Fix verifier log string check for bad alignment.

2018-12-21T13:15:16+00:00

[ Upstream commit c01ac66b38660f2b507ccd0b75d28e3002d56fbb ]

The message got changed a lot time ago.

This was responsible for 36 test case failures on sparc64.

Fixes: f1174f77b50c ("bpf/verifier: rework value tracking")
Signed-off-by: David S. Miller 
Signed-off-by: Alexei Starovoitov 
Signed-off-by: Sasha Levin

tools/bpf: add addition type tests to test_btf

2018-12-21T13:15:13+00:00

[ Upstream commit d08489125e04a9f73d9323caea43270fd22d395f ]

The following additional unit testcases are added to test_btf:
...
BTF raw test[42] (typedef (invalid name, name_off = 0)): OK
BTF raw test[43] (typedef (invalid name, invalid identifier)): OK
BTF raw test[44] (ptr type (invalid name, name_off <> 0)): OK
BTF raw test[45] (volatile type (invalid name, name_off <> 0)): OK
BTF raw test[46] (const type (invalid name, name_off <> 0)): OK
BTF raw test[47] (restrict type (invalid name, name_off <> 0)): OK
BTF raw test[48] (fwd type (invalid name, name_off = 0)): OK
BTF raw test[49] (fwd type (invalid name, invalid identifier)): OK
BTF raw test[50] (array type (invalid name, name_off <> 0)): OK
BTF raw test[51] (struct type (name_off = 0)): OK
BTF raw test[52] (struct type (invalid name, invalid identifier)): OK
BTF raw test[53] (struct member (name_off = 0)): OK
BTF raw test[54] (struct member (invalid name, invalid identifier)): OK
BTF raw test[55] (enum type (name_off = 0)): OK
BTF raw test[56] (enum type (invalid name, invalid identifier)): OK
BTF raw test[57] (enum member (invalid name, name_off = 0)): OK
BTF raw test[58] (enum member (invalid name, invalid identifier)): OK
...

Fixes: c0fa1b6c3efc ("bpf: btf: Add BTF tests")
Acked-by: Martin KaFai Lau 
Signed-off-by: Yonghong Song 
Signed-off-by: Alexei Starovoitov 
Signed-off-by: Sasha Levin

tools/bpf: fix two test_btf unit test cases

2018-12-21T13:15:13+00:00

[ Upstream commit 8800cd031af085807028656c6ba7eb7908d78262 ]

There are two unit test cases, which should encode
TYPEDEF type, but instead encode PTR type.
The error is flagged out after enforcing name
checking in the previous patch.

Fixes: c0fa1b6c3efc ("bpf: btf: Add BTF tests")
Signed-off-by: Martin KaFai Lau 
Signed-off-by: Yonghong Song 
Signed-off-by: Alexei Starovoitov 
Signed-off-by: Sasha Levin

bpf: fix off-by-one error in adjust_subprog_starts

2018-12-17T08:24:42+00:00

commit afd594240806acc138cf696c09f2f4829d55d02f upstream.

When patching in a new sequence for the first insn of a subprog, the start
 of that subprog does not change (it's the first insn of the sequence), so
 adjust_subprog_starts should check start <= off (rather than < off).
Also added a test to test_verifier.c (it's essentially the syz reproducer).

Fixes: cc8b0b92a169 ("bpf: introduce function calls (function boundaries)")
Reported-by: syzbot+4fc427c7af994b0948be@syzkaller.appspotmail.com
Signed-off-by: Edward Cree 
Acked-by: Yonghong Song 
Signed-off-by: Alexei Starovoitov 
Signed-off-by: Greg Kroah-Hartman

proc: fixup map_files test on arm

2018-12-17T08:24:41+00:00

[ Upstream commit dbd4af54745fc0c805217693c807a3928b2d408b ]

https://bugs.linaro.org/show_bug.cgi?id=3782

Turns out arm doesn't permit mapping address 0, so try minimum virtual
address instead.

Link: http://lkml.kernel.org/r/20181113165446.GA28157@avx2
Signed-off-by: Alexey Dobriyan 
Reported-by: Rafael David Tinoco 
Tested-by: Rafael David Tinoco 
Acked-by: Cyrill Gorcunov 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Sasha Levin

tools: bpftool: fix potential NULL pointer dereference in do_load

2018-12-17T08:24:34+00:00

[ Upstream commit dde7011a824cfa815b03f853ec985ff46b740939 ]

This patch fixes a possible null pointer dereference in
do_load, detected by the semantic patch deref_null.cocci,
with the following warning:

./tools/bpf/bpftool/prog.c:1021:23-25: ERROR: map_replace is NULL but dereferenced.

The following code has potential null pointer references:
881             map_replace = reallocarray(map_replace, old_map_fds + 1,
882                                        sizeof(*map_replace));
883             if (!map_replace) {
884                     p_err("mem alloc failed");
885                     goto err_free_reuse_maps;
886             }

...
1019 err_free_reuse_maps:
1020         for (i = 0; i < old_map_fds; i++)
1021                 close(map_replace[i].fd);
1022         free(map_replace);

Fixes: 3ff5a4dc5d89 ("tools: bpftool: allow reuse of maps with bpftool prog load")
Co-developed-by: Wen Yang 
Signed-off-by: Wen Yang 
Signed-off-by: Jakub Kicinski 
Signed-off-by: Daniel Borkmann 
Signed-off-by: Sasha Levin

objtool: Fix segfault in .cold detection with -ffunction-sections

2018-12-17T08:24:33+00:00

[ Upstream commit 22566c1603030f0a036ad564634b064ad1a55db2 ]

Because find_symbol_by_name() traverses the same lists as
read_symbols(), changing sym->name in place without copying it affects
the result of find_symbol_by_name().  In the case where a ".cold"
function precedes its parent in sec->symbol_list, it can result in a
function being considered a parent of itself. This leads to function
length being set to 0 and other consequent side-effects including a
segfault in add_switch_table().  The effects of this bug are only
visible when building with -ffunction-sections in KCFLAGS.

Fix by copying the search string instead of modifying it in place.

Signed-off-by: Artem Savkov 
Signed-off-by: Josh Poimboeuf 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Fixes: 13810435b9a7 ("objtool: Support GCC 8's cold subfunctions")
Link: http://lkml.kernel.org/r/910abd6b5a4945130fd44f787c24e07b9e07c8da.1542736240.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar 
Signed-off-by: Sasha Levin

objtool: Fix double-free in .cold detection error path

2018-12-17T08:24:33+00:00

[ Upstream commit 0b9301fb632f7111a3293a30cc5b20f1b82ed08d ]

If read_symbols() fails during second list traversal (the one dealing
with ".cold" subfunctions) it frees the symbol, but never deletes it
from the list/hash_table resulting in symbol being freed again in
elf_close(). Fix it by just returning an error, leaving cleanup to
elf_close().

Signed-off-by: Artem Savkov 
Signed-off-by: Josh Poimboeuf 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Fixes: 13810435b9a7 ("objtool: Support GCC 8's cold subfunctions")
Link: http://lkml.kernel.org/r/beac5a9b7da9e8be90223459dcbe07766ae437dd.1542736240.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar 
Signed-off-by: Sasha Levin

perf tools: Restore proper cwd on return from mnt namespace

2018-12-17T08:24:33+00:00

[ Upstream commit b01c1f69c8660eaeab7d365cd570103c5c073a02 ]

When reporting on 'record' server we try to retrieve/use the mnt
namespace of the profiled tasks. We use following API with cookie to
hold the return namespace, roughly:

  nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc)
    setns(newns, 0);
  ...
  new ns related open..
  ...
  nsinfo__mountns_exit(struct nscookie *nc)
    setns(nc->oldns)

Once finished we setns to old namespace, which also sets the current
working directory (cwd) to "/", trashing the cwd we had.

This is mostly fine, because we use absolute paths almost everywhere,
but it screws up 'perf diff':

  # perf diff
  failed to open perf.data: No such file or directory  (try 'perf record' first)
  ...

Adding the current working directory to be part of the cookie and
restoring it in the nsinfo__mountns_exit call.

Signed-off-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Krister Johansen 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Fixes: 843ff37bb59e ("perf symbols: Find symbols in different mount namespace")
Link: http://lkml.kernel.org/r/20181101170001.30019-1-jolsa@kernel.org
[ No need to check for NULL args for free(), use zfree() for struct members ]
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Sasha Levin