[DPDK/ethdev Bug 1694] mlx5: ASAN reports memory leaks with send_to_kernel

[DPDK/ethdev Bug 1694] mlx5: ASAN reports memory leaks with send_to_kernel

[bugzilla]

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https://bugs.dpdk.org/show_bug.cgi?id=1694

            Bug ID: 1694
           Summary: mlx5: ASAN reports memory leaks with send_to_kernel
           Product: DPDK
           Version: 24.11
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev@dpdk.org
          Reporter: brian90013@gmail.com
  Target Milestone: ---

Hello,

I am very pleased with the extensive DPDK flow support available with the mlx5
driver. However, when testing my own code compiled with ASAN, I notice many
(limited to 5000) reports of indirect memory leaks from libmlx5.so whenever the
send_to_kernel action is used. I can use other actions like DROP, QUEUE, JUMP,
and COUNT without seeing any leaks. I've repeated the test multiple times with
the same total volume of leaked memory each time.

Hardware:
* 42:00.0 Ethernet controller: Mellanox Technologies MT2892 Family [ConnectX-6
Dx]

Software stack:
* Debian 12.9 kernel 6.1.0-32-amd64
* DOCA-roce 2.10.0 
* DPDK 24.11.1
    * Configured with: meson build -Denable_kmods=true -Db_sanitize=address
-Db_lundef=false -Dbuildtype=debug


Test case:
* Using flow rule described in commit:
https://mails.dpdk.org/archives/dev/2022-September/251470.html

$ sudo dpdk-testpmd --in-memory -- -i
EAL: Detected CPU lcores: 48
EAL: Detected NUMA nodes: 1
EAL: Detected static linkage of DPDK
EAL: Selected IOVA mode 'VA'
EAL: No free 2048 kB hugepages reported on node 0
EAL: 16 hugepages of size 1073741824 reserved, but no mounted hugetlbfs found
for that size
Interactive-mode selected
Warning: NUMA should be configured manually by using --port-numa-config and
--ring-numa-config parameters along with --numa.
testpmd: Flow tunnel offload support might be limited or unavailable on port 0
testpmd: Flow tunnel offload support might be limited or unavailable on port 1
testpmd: create a new mbuf pool <mb_pool_0>: n=523456, size=2176, socket=0
testpmd: preferred mempool ops selected: ring_mp_mc
Configuring Port 0 (socket 0)
Port 0: XX:XX:XX:XX:XX:XX
Configuring Port 1 (socket 0)
Port 1: XX:XX:XX:XX:XX:XX
Checking link statuses...
Done
testpmd> flow create 0 ingress priority 0 group 1 pattern eth type spec 0x0800
type mask 0xffff / end actions send_to_kernel / end
Flow rule #0 created
testpmd> testpmd> quit

Stopping port 0...
Stopping ports...
Done

Stopping port 1...
Stopping ports...
Done

Shutting down port 0...
Closing ports...
Port 0 is closed
Done

Shutting down port 1...
Closing ports...
Port 1 is closed
Done

Bye...

=================================================================
==16057==ERROR: LeakSanitizer: detected memory leaks

Too many leaks! Only the first 5000 leaks encountered will be reported.
Indirect leak of 262184 byte(s) in 21 object(s) allocated from:
    #0 0x7f91436b83b7 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x7f914350693e  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x2493e)

Indirect leak of 4184 byte(s) in 21 object(s) allocated from:
    #0 0x7f91436b83b7 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x7f914350698e  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x2498e)

Indirect leak of 1792 byte(s) in 28 object(s) allocated from:
    #0 0x7f91436b83b7 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x7f9143541fed  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x5ffed)

Indirect leak of 1536 byte(s) in 24 object(s) allocated from:
    #0 0x7f91436b83b7 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x7f914350af81  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x28f81)

Indirect leak of 672 byte(s) in 14 object(s) allocated from:
    #0 0x7f91436b83b7 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x7f9143540ebf  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x5eebf)

Indirect leak of 560 byte(s) in 14 object(s) allocated from:
    #0 0x7f91436b83b7 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x7f91435417a3  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x5f7a3)
    #2 0x7f9143523ab4  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x41ab4)

Indirect leak of 560 byte(s) in 14 object(s) allocated from:
    #0 0x7f91436b83b7 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x7f91435417a3  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x5f7a3)
    #2 0x7f9143523ade  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x41ade)

Indirect leak of 288 byte(s) in 4 object(s) allocated from:
    #0 0x7f91436b83b7 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x7f9143524bae  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x42bae)
    #2 0x7ffc1f4f9bbf  ([stack]+0x1ebbf)

Indirect leak of 288 byte(s) in 4 object(s) allocated from:
    #0 0x7f91436b83b7 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x7f9143524ea6  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x42ea6)

Indirect leak of 256 byte(s) in 4 object(s) allocated from:
    #0 0x7f91436b83b7 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x7f914350b6b7  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x296b7)

Indirect leak of 192 byte(s) in 4 object(s) allocated from:
    #0 0x7f91436b83b7 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x7f9143540ebf  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x5eebf)
    #2 0xbffffffff  (<unknown module>)

Indirect leak of 112 byte(s) in 14 object(s) allocated from:
    #0 0x7f91436b7ffd in __interceptor_posix_memalign
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:145
    #1 0x7f9143523a85  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x41a85)

Indirect leak of 72 byte(s) in 1 object(s) allocated from:
    #0 0x7f91436b83b7 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x7f9143524bae  (/lib/x86_64-linux-gnu/libmlx5.so.1+0x42bae)
    #2 0x607000006f4f  (<unknown module>)


.... text removed for length


Indirect leak of 8 byte(s) in 1 object(s) allocated from:
    #0 0x7f91436b83b7 in __interceptor_calloc
../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:77
    #1 0x7f914350f19e in mlx5dv_dr_domain_create
(/lib/x86_64-linux-gnu/libmlx5.so.1+0x2d19e)

SUMMARY: AddressSanitizer: 631608 byte(s) leaked in 5154 allocation(s).

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