<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux.git/tools/testing, branch v4.19.59</title>
<subtitle>Clone of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git</subtitle>
<link rel='alternate' type='text/html' href='https://git.exis.tech/linux.git/'/>
<entry>
<title>selftests: fib_rule_tests: Fix icmp proto with ipv6</title>
<updated>2019-07-10T07:53:45+00:00</updated>
<author>
<name>David Ahern</name>
<email>dsahern@gmail.com</email>
</author>
<published>2019-04-29T17:30:09+00:00</published>
<link rel='alternate' type='text/html' href='https://git.exis.tech/linux.git/commit/?id=b91ec6ae14daab7a8614c96ac821aaf18f953b42'/>
<id>b91ec6ae14daab7a8614c96ac821aaf18f953b42</id>
<content type='text'>
[ Upstream commit 15d55bae4e3c43cd9f87fd93c73a263e172d34e1 ]

A recent commit returns an error if icmp is used as the ip-proto for
IPv6 fib rules. Update fib_rule_tests to send ipv6-icmp instead of icmp.

Fixes: 5e1a99eae8499 ("ipv4: Add ICMPv6 support when parse route ipproto")
Signed-off-by: David Ahern &lt;dsahern@gmail.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 15d55bae4e3c43cd9f87fd93c73a263e172d34e1 ]

A recent commit returns an error if icmp is used as the ip-proto for
IPv6 fib rules. Update fib_rule_tests to send ipv6-icmp instead of icmp.

Fixes: 5e1a99eae8499 ("ipv4: Add ICMPv6 support when parse route ipproto")
Signed-off-by: David Ahern &lt;dsahern@gmail.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>bpf: lpm_trie: check left child of last leftmost node for NULL</title>
<updated>2019-07-03T11:14:48+00:00</updated>
<author>
<name>Jonathan Lemon</name>
<email>jonathan.lemon@gmail.com</email>
</author>
<published>2019-06-08T19:54:19+00:00</published>
<link rel='alternate' type='text/html' href='https://git.exis.tech/linux.git/commit/?id=4992d4af588156a1b90853d6f61918d3b7ab5278'/>
<id>4992d4af588156a1b90853d6f61918d3b7ab5278</id>
<content type='text'>
commit da2577fdd0932ea4eefe73903f1130ee366767d2 upstream.

If the leftmost parent node of the tree has does not have a child
on the left side, then trie_get_next_key (and bpftool map dump) will
not look at the child on the right.  This leads to the traversal
missing elements.

Lookup is not affected.

Update selftest to handle this case.

Reproducer:

 bpftool map create /sys/fs/bpf/lpm type lpm_trie key 6 \
     value 1 entries 256 name test_lpm flags 1
 bpftool map update pinned /sys/fs/bpf/lpm key  8 0 0 0  0   0 value 1
 bpftool map update pinned /sys/fs/bpf/lpm key 16 0 0 0  0 128 value 2
 bpftool map dump   pinned /sys/fs/bpf/lpm

Returns only 1 element. (2 expected)

Fixes: b471f2f1de8b ("bpf: implement MAP_GET_NEXT_KEY command for LPM_TRIE")
Signed-off-by: Jonathan Lemon &lt;jonathan.lemon@gmail.com&gt;
Acked-by: Martin KaFai Lau &lt;kafai@fb.com&gt;
Signed-off-by: Daniel Borkmann &lt;daniel@iogearbox.net&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit da2577fdd0932ea4eefe73903f1130ee366767d2 upstream.

If the leftmost parent node of the tree has does not have a child
on the left side, then trie_get_next_key (and bpftool map dump) will
not look at the child on the right.  This leads to the traversal
missing elements.

Lookup is not affected.

Update selftest to handle this case.

Reproducer:

 bpftool map create /sys/fs/bpf/lpm type lpm_trie key 6 \
     value 1 entries 256 name test_lpm flags 1
 bpftool map update pinned /sys/fs/bpf/lpm key  8 0 0 0  0   0 value 1
 bpftool map update pinned /sys/fs/bpf/lpm key 16 0 0 0  0 128 value 2
 bpftool map dump   pinned /sys/fs/bpf/lpm

Returns only 1 element. (2 expected)

Fixes: b471f2f1de8b ("bpf: implement MAP_GET_NEXT_KEY command for LPM_TRIE")
Signed-off-by: Jonathan Lemon &lt;jonathan.lemon@gmail.com&gt;
Acked-by: Martin KaFai Lau &lt;kafai@fb.com&gt;
Signed-off-by: Daniel Borkmann &lt;daniel@iogearbox.net&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

</pre>
</div>
</content>
</entry>
<entry>
<title>selftests: vm: install test_vmalloc.sh for run_vmtests</title>
<updated>2019-06-25T03:35:56+00:00</updated>
<author>
<name>Naresh Kamboju</name>
<email>naresh.kamboju@linaro.org</email>
</author>
<published>2019-05-28T12:18:09+00:00</published>
<link rel='alternate' type='text/html' href='https://git.exis.tech/linux.git/commit/?id=bf51ec92a35e09c64ba024a9afd166712ef0a4f8'/>
<id>bf51ec92a35e09c64ba024a9afd166712ef0a4f8</id>
<content type='text'>
[ Upstream commit bc2cce3f2ebcae02aa4bb29e3436bf75ee674c32 ]

Add test_vmalloc.sh to TEST_FILES to make sure it gets installed for
run_vmtests.

Fixed below error:
./run_vmtests: line 217: ./test_vmalloc.sh: No such file or directory

Tested with: make TARGETS=vm install INSTALL_PATH=$PWD/x

Signed-off-by: Naresh Kamboju &lt;naresh.kamboju@linaro.org&gt;
Signed-off-by: Shuah Khan &lt;skhan@linuxfoundation.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit bc2cce3f2ebcae02aa4bb29e3436bf75ee674c32 ]

Add test_vmalloc.sh to TEST_FILES to make sure it gets installed for
run_vmtests.

Fixed below error:
./run_vmtests: line 217: ./test_vmalloc.sh: No such file or directory

Tested with: make TARGETS=vm install INSTALL_PATH=$PWD/x

Signed-off-by: Naresh Kamboju &lt;naresh.kamboju@linaro.org&gt;
Signed-off-by: Shuah Khan &lt;skhan@linuxfoundation.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>kselftest/cgroup: fix incorrect test_core skip</title>
<updated>2019-06-25T03:35:56+00:00</updated>
<author>
<name>Alex Shi</name>
<email>alex.shi@linux.alibaba.com</email>
</author>
<published>2019-05-27T06:28:07+00:00</published>
<link rel='alternate' type='text/html' href='https://git.exis.tech/linux.git/commit/?id=a0e8215eb9f8cc1b28b5c42ea559eece06e8391f'/>
<id>a0e8215eb9f8cc1b28b5c42ea559eece06e8391f</id>
<content type='text'>
[ Upstream commit f97f3f8839eb9de5843066d80819884f7722c8c5 ]

The test_core will skip the
test_cgcore_no_internal_process_constraint_on_threads test case if the
'cpu' controller missing in root's subtree_control. In fact we need to
set the 'cpu' in subtree_control, to make the testing meaningful.

./test_core
...
ok 4 # skip test_cgcore_no_internal_process_constraint_on_threads
...

Signed-off-by: Alex Shi &lt;alex.shi@linux.alibaba.com&gt;
Cc: Shuah Khan &lt;shuah@kernel.org&gt;
Cc: Tejun Heo &lt;tj@kernel.org&gt;
Cc: Roman Gushchin &lt;guro@fb.com&gt;
Cc: Claudio Zumbo &lt;claudioz@fb.com&gt;
Cc: Claudio &lt;claudiozumbo@gmail.com&gt;
Cc: linux-kselftest@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Roman Gushchin &lt;guro@fb.com&gt;
Acked-by: Tejun Heo &lt;tj@kernel.org&gt;
Signed-off-by: Shuah Khan &lt;skhan@linuxfoundation.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit f97f3f8839eb9de5843066d80819884f7722c8c5 ]

The test_core will skip the
test_cgcore_no_internal_process_constraint_on_threads test case if the
'cpu' controller missing in root's subtree_control. In fact we need to
set the 'cpu' in subtree_control, to make the testing meaningful.

./test_core
...
ok 4 # skip test_cgcore_no_internal_process_constraint_on_threads
...

Signed-off-by: Alex Shi &lt;alex.shi@linux.alibaba.com&gt;
Cc: Shuah Khan &lt;shuah@kernel.org&gt;
Cc: Tejun Heo &lt;tj@kernel.org&gt;
Cc: Roman Gushchin &lt;guro@fb.com&gt;
Cc: Claudio Zumbo &lt;claudioz@fb.com&gt;
Cc: Claudio &lt;claudiozumbo@gmail.com&gt;
Cc: linux-kselftest@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Roman Gushchin &lt;guro@fb.com&gt;
Acked-by: Tejun Heo &lt;tj@kernel.org&gt;
Signed-off-by: Shuah Khan &lt;skhan@linuxfoundation.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>kselftest/cgroup: fix unexpected testing failure on test_core</title>
<updated>2019-06-25T03:35:56+00:00</updated>
<author>
<name>Alex Shi</name>
<email>alex.shi@linux.alibaba.com</email>
</author>
<published>2019-05-27T06:28:06+00:00</published>
<link rel='alternate' type='text/html' href='https://git.exis.tech/linux.git/commit/?id=59243d6fb45c4a733f06a54c6c85d9d42085115e'/>
<id>59243d6fb45c4a733f06a54c6c85d9d42085115e</id>
<content type='text'>
[ Upstream commit 00e38a5d753d7788852f81703db804a60a84c26e ]

The cgroup testing relys on the root cgroup's subtree_control setting,
If the 'memory' controller isn't set, some test cases will be failed
as following:

$sudo  ./test_core
not ok 1 test_cgcore_internal_process_constraint
ok 2 test_cgcore_top_down_constraint_enable
not ok 3 test_cgcore_top_down_constraint_disable
...

To correct this unexpected failure, this patch write the 'memory' to
subtree_control of root to get a right result.

Signed-off-by: Alex Shi &lt;alex.shi@linux.alibaba.com&gt;
Cc: Shuah Khan &lt;shuah@kernel.org&gt;
Cc: Tejun Heo &lt;tj@kernel.org&gt;
Cc: Roman Gushchin &lt;guro@fb.com&gt;
Cc: Claudio Zumbo &lt;claudioz@fb.com&gt;
Cc: Claudio &lt;claudiozumbo@gmail.com&gt;
Cc: linux-kselftest@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Roman Gushchin &lt;guro@fb.com&gt;
Acked-by: Tejun Heo &lt;tj@kernel.org&gt;
Signed-off-by: Shuah Khan &lt;skhan@linuxfoundation.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 00e38a5d753d7788852f81703db804a60a84c26e ]

The cgroup testing relys on the root cgroup's subtree_control setting,
If the 'memory' controller isn't set, some test cases will be failed
as following:

$sudo  ./test_core
not ok 1 test_cgcore_internal_process_constraint
ok 2 test_cgcore_top_down_constraint_enable
not ok 3 test_cgcore_top_down_constraint_disable
...

To correct this unexpected failure, this patch write the 'memory' to
subtree_control of root to get a right result.

Signed-off-by: Alex Shi &lt;alex.shi@linux.alibaba.com&gt;
Cc: Shuah Khan &lt;shuah@kernel.org&gt;
Cc: Tejun Heo &lt;tj@kernel.org&gt;
Cc: Roman Gushchin &lt;guro@fb.com&gt;
Cc: Claudio Zumbo &lt;claudioz@fb.com&gt;
Cc: Claudio &lt;claudiozumbo@gmail.com&gt;
Cc: linux-kselftest@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Roman Gushchin &lt;guro@fb.com&gt;
Acked-by: Tejun Heo &lt;tj@kernel.org&gt;
Signed-off-by: Shuah Khan &lt;skhan@linuxfoundation.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>kselftest/cgroup: fix unexpected testing failure on test_memcontrol</title>
<updated>2019-06-25T03:35:56+00:00</updated>
<author>
<name>Alex Shi</name>
<email>alex.shi@linux.alibaba.com</email>
</author>
<published>2019-05-27T06:28:05+00:00</published>
<link rel='alternate' type='text/html' href='https://git.exis.tech/linux.git/commit/?id=9c2eebe31d756efd8106a0ed4be80e5bda16e179'/>
<id>9c2eebe31d756efd8106a0ed4be80e5bda16e179</id>
<content type='text'>
[ Upstream commit f6131f28057d4fd8922599339e701a2504e0f23d ]

The cgroup testing relies on the root cgroup's subtree_control setting,
If the 'memory' controller isn't set, all test cases will be failed
as following:

$ sudo ./test_memcontrol
not ok 1 test_memcg_subtree_control
not ok 2 test_memcg_current
ok 3 # skip test_memcg_min
not ok 4 test_memcg_low
not ok 5 test_memcg_high
not ok 6 test_memcg_max
not ok 7 test_memcg_oom_events
ok 8 # skip test_memcg_swap_max
not ok 9 test_memcg_sock
not ok 10 test_memcg_oom_group_leaf_events
not ok 11 test_memcg_oom_group_parent_events
not ok 12 test_memcg_oom_group_score_events

To correct this unexpected failure, this patch write the 'memory' to
subtree_control of root to get a right result.

Signed-off-by: Alex Shi &lt;alex.shi@linux.alibaba.com&gt;
Cc: Shuah Khan &lt;shuah@kernel.org&gt;
Cc: Roman Gushchin &lt;guro@fb.com&gt;
Cc: Tejun Heo &lt;tj@kernel.org&gt;
Cc: Mike Rapoport &lt;rppt@linux.vnet.ibm.com&gt;
Cc: Jay Kamat &lt;jgkamat@fb.com&gt;
Cc: linux-kselftest@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Roman Gushchin &lt;guro@fb.com&gt;
Acked-by: Tejun Heo &lt;tj@kernel.org&gt;
Signed-off-by: Shuah Khan &lt;skhan@linuxfoundation.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit f6131f28057d4fd8922599339e701a2504e0f23d ]

The cgroup testing relies on the root cgroup's subtree_control setting,
If the 'memory' controller isn't set, all test cases will be failed
as following:

$ sudo ./test_memcontrol
not ok 1 test_memcg_subtree_control
not ok 2 test_memcg_current
ok 3 # skip test_memcg_min
not ok 4 test_memcg_low
not ok 5 test_memcg_high
not ok 6 test_memcg_max
not ok 7 test_memcg_oom_events
ok 8 # skip test_memcg_swap_max
not ok 9 test_memcg_sock
not ok 10 test_memcg_oom_group_leaf_events
not ok 11 test_memcg_oom_group_parent_events
not ok 12 test_memcg_oom_group_score_events

To correct this unexpected failure, this patch write the 'memory' to
subtree_control of root to get a right result.

Signed-off-by: Alex Shi &lt;alex.shi@linux.alibaba.com&gt;
Cc: Shuah Khan &lt;shuah@kernel.org&gt;
Cc: Roman Gushchin &lt;guro@fb.com&gt;
Cc: Tejun Heo &lt;tj@kernel.org&gt;
Cc: Mike Rapoport &lt;rppt@linux.vnet.ibm.com&gt;
Cc: Jay Kamat &lt;jgkamat@fb.com&gt;
Cc: linux-kselftest@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Roman Gushchin &lt;guro@fb.com&gt;
Acked-by: Tejun Heo &lt;tj@kernel.org&gt;
Signed-off-by: Shuah Khan &lt;skhan@linuxfoundation.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>selftests: netfilter: missing error check when setting up veth interface</title>
<updated>2019-06-22T06:15:15+00:00</updated>
<author>
<name>Jeffrin Jose T</name>
<email>jeffrin@rajagiritech.edu.in</email>
</author>
<published>2019-05-15T06:44:04+00:00</published>
<link rel='alternate' type='text/html' href='https://git.exis.tech/linux.git/commit/?id=ef4ffa0f0b677e090a4176b19599922af20a43fa'/>
<id>ef4ffa0f0b677e090a4176b19599922af20a43fa</id>
<content type='text'>
[ Upstream commit 82ce6eb1dd13fd12e449b2ee2c2ec051e6f52c43 ]

A test for the basic NAT functionality uses ip command which needs veth
device. There is a condition where the kernel support for veth is not
compiled into the kernel and the test script breaks. This patch contains
code for reasonable error display and correct code exit.

Signed-off-by: Jeffrin Jose T &lt;jeffrin@rajagiritech.edu.in&gt;
Acked-by: Florian Westphal &lt;fw@strlen.de&gt;
Signed-off-by: Pablo Neira Ayuso &lt;pablo@netfilter.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 82ce6eb1dd13fd12e449b2ee2c2ec051e6f52c43 ]

A test for the basic NAT functionality uses ip command which needs veth
device. There is a condition where the kernel support for veth is not
compiled into the kernel and the test script breaks. This patch contains
code for reasonable error display and correct code exit.

Signed-off-by: Jeffrin Jose T &lt;jeffrin@rajagiritech.edu.in&gt;
Acked-by: Florian Westphal &lt;fw@strlen.de&gt;
Signed-off-by: Pablo Neira Ayuso &lt;pablo@netfilter.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>selftests/timers: Add missing fflush(stdout) calls</title>
<updated>2019-06-19T06:18:04+00:00</updated>
<author>
<name>Kees Cook</name>
<email>keescook@chromium.org</email>
</author>
<published>2019-05-20T22:37:49+00:00</published>
<link rel='alternate' type='text/html' href='https://git.exis.tech/linux.git/commit/?id=b64df8133c2e8263febbd6d279554d257b85417b'/>
<id>b64df8133c2e8263febbd6d279554d257b85417b</id>
<content type='text'>
[ Upstream commit fe48319243a626c860fd666ca032daacc2ba84a5 ]

When running under a pipe, some timer tests would not report output in
real-time because stdout flushes were missing after printf()s that lacked
a newline. This adds them to restore real-time status output that humans
can enjoy.

Signed-off-by: Kees Cook &lt;keescook@chromium.org&gt;
Signed-off-by: Shuah Khan &lt;skhan@linuxfoundation.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit fe48319243a626c860fd666ca032daacc2ba84a5 ]

When running under a pipe, some timer tests would not report output in
real-time because stdout flushes were missing after printf()s that lacked
a newline. This adds them to restore real-time status output that humans
can enjoy.

Signed-off-by: Kees Cook &lt;keescook@chromium.org&gt;
Signed-off-by: Shuah Khan &lt;skhan@linuxfoundation.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>selftests: fib_rule_tests: fix local IPv4 address typo</title>
<updated>2019-06-19T06:18:04+00:00</updated>
<author>
<name>Hangbin Liu</name>
<email>liuhangbin@gmail.com</email>
</author>
<published>2019-05-20T04:36:54+00:00</published>
<link rel='alternate' type='text/html' href='https://git.exis.tech/linux.git/commit/?id=3e1d7417b4d6c9980aa0abdcaeda2a190fcb0817'/>
<id>3e1d7417b4d6c9980aa0abdcaeda2a190fcb0817</id>
<content type='text'>
[ Upstream commit fc82d93e57e3d41f79eff19031588b262fc3d0b6 ]

The IPv4 testing address are all in 192.51.100.0 subnet. It doesn't make
sense to set a 198.51.100.1 local address. Should be a typo.

Fixes: 65b2b4939a64 ("selftests: net: initial fib rule tests")
Signed-off-by: Hangbin Liu &lt;liuhangbin@gmail.com&gt;
Reviewed-by: David Ahern &lt;dsahern@gmail.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit fc82d93e57e3d41f79eff19031588b262fc3d0b6 ]

The IPv4 testing address are all in 192.51.100.0 subnet. It doesn't make
sense to set a 198.51.100.1 local address. Should be a typo.

Fixes: 65b2b4939a64 ("selftests: net: initial fib rule tests")
Signed-off-by: Hangbin Liu &lt;liuhangbin@gmail.com&gt;
Reviewed-by: David Ahern &lt;dsahern@gmail.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>selftests/bpf: ksym_search won't check symbols exists</title>
<updated>2019-05-31T13:46:25+00:00</updated>
<author>
<name>Daniel T. Lee</name>
<email>danieltimlee@gmail.com</email>
</author>
<published>2019-04-03T22:17:55+00:00</published>
<link rel='alternate' type='text/html' href='https://git.exis.tech/linux.git/commit/?id=f8f54929bd239bd875c1004c997b1ffc450a45f4'/>
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[ Upstream commit 0979ff7992fb6f4eb837995b12f4071dcafebd2d ]

Currently, ksym_search located at trace_helpers won't check symbols are
existing or not.

In ksym_search, when symbol is not found, it will return &amp;syms[0](_stext).
But when the kernel symbols are not loaded, it will return NULL, which is
not a desired action.

This commit will add verification logic whether symbols are loaded prior
to the symbol search.

Signed-off-by: Daniel T. Lee &lt;danieltimlee@gmail.com&gt;
Signed-off-by: Daniel Borkmann &lt;daniel@iogearbox.net&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
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[ Upstream commit 0979ff7992fb6f4eb837995b12f4071dcafebd2d ]

Currently, ksym_search located at trace_helpers won't check symbols are
existing or not.

In ksym_search, when symbol is not found, it will return &amp;syms[0](_stext).
But when the kernel symbols are not loaded, it will return NULL, which is
not a desired action.

This commit will add verification logic whether symbols are loaded prior
to the symbol search.

Signed-off-by: Daniel T. Lee &lt;danieltimlee@gmail.com&gt;
Signed-off-by: Daniel Borkmann &lt;daniel@iogearbox.net&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
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