CVE-2023-53347

In case user switch a device from switchdev mode to legacy mode, mlx5 first unpair the E-switch and afterwards unload the uplink vport. From the other hand, in case user remove or reload a device, mlx5 first unload the uplink vport and afterwards unpair the E-switch.

The latter is causing a bug[1], hence, handle pairing of E-switch as part of uplink un/load APIs.

[1] In case VFLAG is used, every tc fdb flow is duplicated to the peer esw. However, the original esw keeps a pointer to this duplicated flow, not the peer esw. e.g.: if user create tc fdb flow over esw0, the flow is duplicated over esw1, in FW/HW, but in SW, esw0 keeps a pointer to the duplicated flow. During module unload while a peer tc fdb flow is still offloaded, in case the first device to be removed is the peer device (esw1 in the example above), the peer net-dev is destroyed, and so the mlx5epriv is memset to 0. Afterwards, the peer device is trying to unpair himself from the original device (esw0 in the example above). Unpair API invoke the original device to clear peer flow from its eswitch (esw0), but the peer flow, which is stored over the original eswitch (esw0), is trying to use the peer mlx5e_priv, which is memset to 0 and result in bellow kernel-oops.

[ 157.964081 ] BUG: unable to handle page fault for address: 000000000002ce60 [ 157.964662 ] #PF: supervisor read access in kernel mode [ 157.965123 ] #PF: errorcode(0x0000) - not-present page [ 157.965582 ] PGD 0 P4D 0 [ 157.965866 ] Oops: 0000 [#1] SMP [ 157.967670 ] RIP: 0010:mlx5etcdelfdbflow+0x48/0x460 [mlx5core] [ 157.976164 ] Call Trace: [ 157.976437 ] <TASK> [ 157.976690 ] _mlx5etcdelfdbpeerflow+0xe6/0x100 [mlx5core] [ 157.977230 ] mlx5etccleanfdbpeerflows+0x67/0x90 [mlx5core] [ 157.977767 ] mlx5eswoffloadsunpair+0x2d/0x1e0 [mlx5core] [ 157.984653 ] mlx5eswoffloadsdevcomevent+0xbf/0x130 [mlx5core] [ 157.985212 ] mlx5devcomsendevent+0xa3/0xb0 [mlx5core] [ 157.985714 ] eswoffloadsdisable+0x5a/0x110 [mlx5core] [ 157.986209 ] mlx5eswitchdisablelocked+0x152/0x170 [mlx5core] [ 157.986757 ] mlx5eswitchdisable+0x51/0x80 [mlx5core] [ 157.987248 ] mlx5unload+0x2a/0xb0 [mlx5core] [ 157.987678 ] mlx5uninitone+0x5f/0xd0 [mlx5core] [ 157.988127 ] removeone+0x64/0xe0 [mlx5core] [ 157.988549 ] pcideviceremove+0x31/0xa0 [ 157.988933 ] devicereleasedriverinternal+0x18f/0x1f0 [ 157.989402 ] driverdetach+0x3f/0x80 [ 157.989754 ] busremovedriver+0x70/0xf0 [ 157.990129 ] pciunregisterdriver+0x34/0x90 [ 157.990537 ] mlx5cleanup+0xc/0x1c [mlx5core] [ 157.990972 ] _x64sysdeletemodule+0x15a/0x250 [ 157.991398 ] ? exittousermodeprepare+0xea/0x110 [ 157.991840 ] dosyscall64+0x3d/0x90 [ 157.992198 ] entrySYSCALL64after_hwframe+0x46/0xb0

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

04de7dda7394fa9c2b0fc9cec65661d9b4f0d04d

Fixed

b17294e7aa8c39dbb9c3e28e2d1983c88b94b387

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

04de7dda7394fa9c2b0fc9cec65661d9b4f0d04d

Fixed

10cbfecc0f99f579fb170feee866c9efaab7ee47

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

04de7dda7394fa9c2b0fc9cec65661d9b4f0d04d

Fixed

2be5bd42a5bba1a05daedc86cf0e248210009669

Affected versions

v4.*

v4.20

v4.20-rc7

v5.*

v5.0

v5.0-rc1

v5.0-rc2

v5.0-rc3

v5.0-rc4

v5.0-rc5

v5.0-rc6

v5.0-rc7

v5.0-rc8

v5.1

v5.1-rc1

v5.1-rc2

v5.1-rc3

v5.1-rc4

v5.1-rc5

v5.1-rc6

v5.1-rc7

v5.10

v5.10-rc1

v5.10-rc2

v5.10-rc3

v5.10-rc4

v5.10-rc5

v5.10-rc6

v5.10-rc7

v5.11

v5.11-rc1

v5.11-rc2

v5.11-rc3

v5.11-rc4

v5.11-rc5

v5.11-rc6

v5.11-rc7

v5.12

v5.12-rc1

v5.12-rc1-dontuse

v5.12-rc2

v5.12-rc3

v5.12-rc4

v5.12-rc5

v5.12-rc6

v5.12-rc7

v5.12-rc8

v5.13

v5.13-rc1

v5.13-rc2

v5.13-rc3

v5.13-rc4

v5.13-rc5

v5.13-rc6

v5.13-rc7

v5.14

v5.14-rc1

v5.14-rc2

v5.14-rc3

v5.14-rc4

v5.14-rc5

v5.14-rc6

v5.14-rc7

v5.15

v5.15-rc1

v5.15-rc2

v5.15-rc3

v5.15-rc4

v5.15-rc5

v5.15-rc6

v5.15-rc7

v5.16

v5.16-rc1

v5.16-rc2

v5.16-rc3

v5.16-rc4

v5.16-rc5

v5.16-rc6

v5.16-rc7

v5.16-rc8

v5.17

v5.17-rc1

v5.17-rc2

v5.17-rc3

v5.17-rc4

v5.17-rc5

v5.17-rc6

v5.17-rc7

v5.17-rc8

v5.18

v5.18-rc1

v5.18-rc2

v5.18-rc3

v5.18-rc4

v5.18-rc5

v5.18-rc6

v5.18-rc7

v5.19

v5.19-rc1

v5.19-rc2

v5.19-rc3

v5.19-rc4

v5.19-rc5

v5.19-rc6

v5.19-rc7

v5.19-rc8

v5.2

v5.2-rc1

v5.2-rc2

v5.2-rc3

v5.2-rc4

v5.2-rc5

v5.2-rc6

v5.2-rc7

v5.3

v5.3-rc1

v5.3-rc2

v5.3-rc3

v5.3-rc4

v5.3-rc5

v5.3-rc6

v5.3-rc7

v5.3-rc8

v5.4

v5.4-rc1

v5.4-rc2

v5.4-rc3

v5.4-rc4

v5.4-rc5

v5.4-rc6

v5.4-rc7

v5.4-rc8

v5.5

v5.5-rc1

v5.5-rc2

v5.5-rc3

v5.5-rc4

v5.5-rc5

v5.5-rc6

v5.5-rc7

v5.6

v5.6-rc1

v5.6-rc2

v5.6-rc3

v5.6-rc4

v5.6-rc5

v5.6-rc6

v5.6-rc7

v5.7

v5.7-rc1

v5.7-rc2

v5.7-rc3

v5.7-rc4

v5.7-rc5

v5.7-rc6

v5.7-rc7

v5.8

v5.8-rc1

v5.8-rc2

v5.8-rc3

v5.8-rc4

v5.8-rc5

v5.8-rc6

v5.8-rc7

v5.9

v5.9-rc1

v5.9-rc2

v5.9-rc3

v5.9-rc4

v5.9-rc5

v5.9-rc6

v5.9-rc7

v5.9-rc8

v6.*

v6.0

v6.0-rc1

v6.0-rc2

v6.0-rc3

v6.0-rc4

v6.0-rc5

v6.0-rc6

v6.0-rc7

v6.1

v6.1-rc1

v6.1-rc2

v6.1-rc3

v6.1-rc4

v6.1-rc5

v6.1-rc6

v6.1-rc7

v6.1-rc8

v6.1.1

v6.1.10

v6.1.11

v6.1.12

v6.1.13

v6.1.14

v6.1.15

v6.1.16

v6.1.17

v6.1.18

v6.1.19

v6.1.2

v6.1.20

v6.1.21

v6.1.22

v6.1.23

v6.1.24

v6.1.25

v6.1.26

v6.1.27

v6.1.28

v6.1.29

v6.1.3

v6.1.30

v6.1.4

v6.1.5

v6.1.6

v6.1.7

v6.1.8

v6.1.9

v6.2

v6.2-rc1

v6.2-rc2

v6.2-rc3

v6.2-rc4

v6.2-rc5

v6.2-rc6

v6.2-rc7

v6.2-rc8

v6.3

v6.3-rc1

v6.3-rc2

v6.3-rc3

v6.3-rc4

v6.3-rc5

v6.3-rc6

v6.3-rc7

v6.3.1

v6.3.2

v6.3.3

v6.3.4

v6.4-rc1

v6.4-rc2

Database specific

vanir_signatures

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            "file": "drivers/net/ethernet/mellanox/mlx5/core/en_tc.c"
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        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b17294e7aa8c39dbb9c3e28e2d1983c88b94b387",
        "id": "CVE-2023-53347-8dfeecb1",
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        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@10cbfecc0f99f579fb170feee866c9efaab7ee47",
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            "function": "esw_offloads_devcom_init"
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        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@10cbfecc0f99f579fb170feee866c9efaab7ee47",
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        "id": "CVE-2023-53347-cca66e84",
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            "function": "esw_offloads_devcom_cleanup"
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        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@10cbfecc0f99f579fb170feee866c9efaab7ee47",
        "id": "CVE-2023-53347-d8f68927",
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        "digest": {
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        "target": {
            "file": "drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c",
            "function": "esw_offloads_enable"
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        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b17294e7aa8c39dbb9c3e28e2d1983c88b94b387",
        "id": "CVE-2023-53347-e93156b5",
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    {
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        "digest": {
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        "target": {
            "file": "drivers/net/ethernet/mellanox/mlx5/core/en_tc.c",
            "function": "mlx5e_tc_esw_init"
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        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@2be5bd42a5bba1a05daedc86cf0e248210009669",
        "id": "CVE-2023-53347-f2c3aba7",
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        "signature_version": "v1"
    }
]

Linux / Kernel

Package

Name: Kernel

Affected ranges

Type: ECOSYSTEM
Events: Introduced

5.0.0

Fixed

6.1.31

Type: ECOSYSTEM
Events: Introduced

6.2.0

Fixed

6.3.5