CVE-2025-40032

The fields dmachantx and dmachanrx of the struct pciepftest can be NULL even after EPF initialization. Then it is prudent to check that they have non-NULL values before releasing the channels. Add the checks in pciepftestcleandma_chan().

Without the checks, NULL pointer dereferences happen and they can lead to a kernel panic in some cases:

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000050 Call trace: dmareleasechannel+0x2c/0x120 (P) pciepftestepcdeinit+0x94/0xc0 [pciepftest] pciepcdeinitnotify+0x74/0xc0 tegrapcieeppexrstirq+0x250/0x5d8 irqthreadfn+0x34/0xb8 irqthread+0x18c/0x2e8 kthread+0x14c/0x210 retfrom_fork+0x10/0x20

[mani: trimmed the stack trace]

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

5ebf3fc59bd20d17df3ba26159787d13cf20d362

Fixed

6411f840a9b5c47c00ca8e004733de232553870d

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

5ebf3fc59bd20d17df3ba26159787d13cf20d362

Fixed

0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b

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

5ebf3fc59bd20d17df3ba26159787d13cf20d362

Fixed

fb54ffd60064c4e5139a3eb216e877b1acae1c8b

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

5ebf3fc59bd20d17df3ba26159787d13cf20d362

Fixed

57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba

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

5ebf3fc59bd20d17df3ba26159787d13cf20d362

Fixed

85afa9ea122dd9d4a2ead104a951d318975dcd25

Affected versions

v5.*

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

v5.6

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

v6.1.100

v6.1.101

v6.1.102

v6.1.103

v6.1.104

v6.1.105

v6.1.106

v6.1.107

v6.1.108

v6.1.109

v6.1.11

v6.1.110

v6.1.111

v6.1.112

v6.1.113

v6.1.114

v6.1.115

v6.1.116

v6.1.117

v6.1.118

v6.1.119

v6.1.12

v6.1.120

v6.1.121

v6.1.122

v6.1.123

v6.1.124

v6.1.125

v6.1.126

v6.1.127

v6.1.128

v6.1.129

v6.1.13

v6.1.130

v6.1.131

v6.1.132

v6.1.133

v6.1.134

v6.1.135

v6.1.136

v6.1.137

v6.1.138

v6.1.139

v6.1.14

v6.1.140

v6.1.141

v6.1.142

v6.1.143

v6.1.144

v6.1.145

v6.1.146

v6.1.147

v6.1.148

v6.1.149

v6.1.15

v6.1.150

v6.1.151

v6.1.152

v6.1.153

v6.1.154

v6.1.155

v6.1.156

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

v6.1.31

v6.1.32

v6.1.33

v6.1.34

v6.1.35

v6.1.36

v6.1.37

v6.1.38

v6.1.39

v6.1.4

v6.1.40

v6.1.41

v6.1.42

v6.1.43

v6.1.44

v6.1.45

v6.1.46

v6.1.47

v6.1.48

v6.1.49

v6.1.5

v6.1.50

v6.1.51

v6.1.52

v6.1.53

v6.1.54

v6.1.55

v6.1.56

v6.1.57

v6.1.58

v6.1.59

v6.1.6

v6.1.60

v6.1.61

v6.1.62

v6.1.63

v6.1.64

v6.1.65

v6.1.66

v6.1.67

v6.1.68

v6.1.69

v6.1.7

v6.1.70

v6.1.71

v6.1.72

v6.1.73

v6.1.74

v6.1.75

v6.1.76

v6.1.77

v6.1.78

v6.1.79

v6.1.8

v6.1.80

v6.1.81

v6.1.82

v6.1.83

v6.1.84

v6.1.85

v6.1.86

v6.1.87

v6.1.88

v6.1.89

v6.1.9

v6.1.90

v6.1.91

v6.1.92

v6.1.93

v6.1.94

v6.1.95

v6.1.96

v6.1.97

v6.1.98

v6.1.99

v6.10

v6.10-rc1

v6.10-rc2

v6.10-rc3

v6.10-rc4

v6.10-rc5

v6.10-rc6

v6.10-rc7

v6.11

v6.11-rc1

v6.11-rc2

v6.11-rc3

v6.11-rc4

v6.11-rc5

v6.11-rc6

v6.11-rc7

v6.12

v6.12-rc1

v6.12-rc2

v6.12-rc3

v6.12-rc4

v6.12-rc5

v6.12-rc6

v6.12-rc7

v6.12.1

v6.12.10

v6.12.11

v6.12.12

v6.12.13

v6.12.14

v6.12.15

v6.12.16

v6.12.17

v6.12.18

v6.12.19

v6.12.2

v6.12.20

v6.12.21

v6.12.22

v6.12.23

v6.12.24

v6.12.25

v6.12.26

v6.12.27

v6.12.28

v6.12.29

v6.12.3

v6.12.30

v6.12.31

v6.12.32

v6.12.33

v6.12.34

v6.12.35

v6.12.36

v6.12.37

v6.12.38

v6.12.39

v6.12.4

v6.12.40

v6.12.41

v6.12.42

v6.12.43

v6.12.44

v6.12.45

v6.12.46

v6.12.47

v6.12.48

v6.12.49

v6.12.5

v6.12.50

v6.12.51

v6.12.52

v6.12.53

v6.12.6

v6.12.7

v6.12.8

v6.12.9

v6.13

v6.13-rc1

v6.13-rc2

v6.13-rc3

v6.13-rc4

v6.13-rc5

v6.13-rc6

v6.13-rc7

v6.14

v6.14-rc1

v6.14-rc2

v6.14-rc3

v6.14-rc4

v6.14-rc5

v6.14-rc6

v6.14-rc7

v6.15

v6.15-rc1

v6.15-rc2

v6.15-rc3

v6.15-rc4

v6.15-rc5

v6.15-rc6

v6.15-rc7

v6.16

v6.16-rc1

v6.16-rc2

v6.16-rc3

v6.16-rc4

v6.16-rc5

v6.16-rc6

v6.16-rc7

v6.17

v6.17-rc1

v6.17-rc2

v6.17-rc3

v6.17-rc4

v6.17-rc5

v6.17-rc6

v6.17-rc7

v6.17.1

v6.17.2

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

v6.4

v6.4-rc1

v6.4-rc2

v6.4-rc3

v6.4-rc4

v6.4-rc5

v6.4-rc6

v6.4-rc7

v6.5

v6.5-rc1

v6.5-rc2

v6.5-rc3

v6.5-rc4

v6.5-rc5

v6.5-rc6

v6.5-rc7

v6.6

v6.6-rc1

v6.6-rc2

v6.6-rc3

v6.6-rc4

v6.6-rc5

v6.6-rc6

v6.6-rc7

v6.6.1

v6.6.10

v6.6.100

v6.6.101

v6.6.102

v6.6.103

v6.6.104

v6.6.105

v6.6.106

v6.6.107

v6.6.108

v6.6.109

v6.6.11

v6.6.110

v6.6.111

v6.6.112

v6.6.12

v6.6.13

v6.6.14

v6.6.15

v6.6.16

v6.6.17

v6.6.18

v6.6.19

v6.6.2

v6.6.20

v6.6.21

v6.6.22

v6.6.23

v6.6.24

v6.6.25

v6.6.26

v6.6.27

v6.6.28

v6.6.29

v6.6.3

v6.6.30

v6.6.31

v6.6.32

v6.6.33

v6.6.34

v6.6.35

v6.6.36

v6.6.37

v6.6.38

v6.6.39

v6.6.4

v6.6.40

v6.6.41

v6.6.42

v6.6.43

v6.6.44

v6.6.45

v6.6.46

v6.6.47

v6.6.48

v6.6.49

v6.6.5

v6.6.50

v6.6.51

v6.6.52

v6.6.53

v6.6.54

v6.6.55

v6.6.56

v6.6.57

v6.6.58

v6.6.59

v6.6.6

v6.6.60

v6.6.61

v6.6.62

v6.6.63

v6.6.64

v6.6.65

v6.6.66

v6.6.67

v6.6.68

v6.6.69

v6.6.7

v6.6.70

v6.6.71

v6.6.72

v6.6.73

v6.6.74

v6.6.75

v6.6.76

v6.6.77

v6.6.78

v6.6.79

v6.6.8

v6.6.80

v6.6.81

v6.6.82

v6.6.83

v6.6.84

v6.6.85

v6.6.86

v6.6.87

v6.6.88

v6.6.89

v6.6.9

v6.6.90

v6.6.91

v6.6.92

v6.6.93

v6.6.94

v6.6.95

v6.6.96

v6.6.97

v6.6.98

v6.6.99

v6.7

v6.7-rc1

v6.7-rc2

v6.7-rc3

v6.7-rc4

v6.7-rc5

v6.7-rc6

v6.7-rc7

v6.7-rc8

v6.8

v6.8-rc1

v6.8-rc2

v6.8-rc3

v6.8-rc4

v6.8-rc5

v6.8-rc6

v6.8-rc7

v6.9

v6.9-rc1

v6.9-rc2

v6.9-rc3

v6.9-rc4

v6.9-rc5

v6.9-rc6

v6.9-rc7

Database specific

vanir_signatures

[
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "function_hash": "21354816967218049354477074209518279104",
            "length": 311.0
        },
        "id": "CVE-2025-40032-026eeb9c",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b",
        "signature_type": "Function",
        "target": {
            "function": "pci_epf_test_clean_dma_chan",
            "file": "drivers/pci/endpoint/functions/pci-epf-test.c"
        }
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "88338841766157995827596874544722982704",
                "263431307928327410974748723613766239403",
                "326017850149172471781519232617685933718",
                "210676927539530588464029083280952117613",
                "23803278029740487989320947573853489140",
                "69851593220146005959690359714556192207",
                "211931654766101652462147383295876641610",
                "90478109281078936140143564163669095503",
                "209604917952259312821604324425572908138",
                "228443930959379456599711531975653939930",
                "111722646095343740760641917759186254234"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2025-40032-028530bb",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b",
        "signature_type": "Line",
        "target": {
            "file": "drivers/pci/endpoint/functions/pci-epf-test.c"
        }
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "88338841766157995827596874544722982704",
                "263431307928327410974748723613766239403",
                "326017850149172471781519232617685933718",
                "210676927539530588464029083280952117613",
                "23803278029740487989320947573853489140",
                "69851593220146005959690359714556192207",
                "211931654766101652462147383295876641610",
                "90478109281078936140143564163669095503",
                "209604917952259312821604324425572908138",
                "228443930959379456599711531975653939930",
                "111722646095343740760641917759186254234"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2025-40032-06997f51",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba",
        "signature_type": "Line",
        "target": {
            "file": "drivers/pci/endpoint/functions/pci-epf-test.c"
        }
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "function_hash": "21354816967218049354477074209518279104",
            "length": 311.0
        },
        "id": "CVE-2025-40032-09e4fd76",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@85afa9ea122dd9d4a2ead104a951d318975dcd25",
        "signature_type": "Function",
        "target": {
            "function": "pci_epf_test_clean_dma_chan",
            "file": "drivers/pci/endpoint/functions/pci-epf-test.c"
        }
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "88338841766157995827596874544722982704",
                "263431307928327410974748723613766239403",
                "326017850149172471781519232617685933718",
                "210676927539530588464029083280952117613",
                "23803278029740487989320947573853489140",
                "69851593220146005959690359714556192207",
                "211931654766101652462147383295876641610",
                "90478109281078936140143564163669095503",
                "209604917952259312821604324425572908138",
                "228443930959379456599711531975653939930",
                "111722646095343740760641917759186254234"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2025-40032-53e84d07",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@85afa9ea122dd9d4a2ead104a951d318975dcd25",
        "signature_type": "Line",
        "target": {
            "file": "drivers/pci/endpoint/functions/pci-epf-test.c"
        }
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "88338841766157995827596874544722982704",
                "263431307928327410974748723613766239403",
                "326017850149172471781519232617685933718",
                "210676927539530588464029083280952117613",
                "23803278029740487989320947573853489140",
                "69851593220146005959690359714556192207",
                "211931654766101652462147383295876641610",
                "90478109281078936140143564163669095503",
                "209604917952259312821604324425572908138",
                "228443930959379456599711531975653939930",
                "111722646095343740760641917759186254234"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2025-40032-5665cf98",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@fb54ffd60064c4e5139a3eb216e877b1acae1c8b",
        "signature_type": "Line",
        "target": {
            "file": "drivers/pci/endpoint/functions/pci-epf-test.c"
        }
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "function_hash": "21354816967218049354477074209518279104",
            "length": 311.0
        },
        "id": "CVE-2025-40032-6608a610",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@fb54ffd60064c4e5139a3eb216e877b1acae1c8b",
        "signature_type": "Function",
        "target": {
            "function": "pci_epf_test_clean_dma_chan",
            "file": "drivers/pci/endpoint/functions/pci-epf-test.c"
        }
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "function_hash": "21354816967218049354477074209518279104",
            "length": 311.0
        },
        "id": "CVE-2025-40032-9d0e6425",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@6411f840a9b5c47c00ca8e004733de232553870d",
        "signature_type": "Function",
        "target": {
            "function": "pci_epf_test_clean_dma_chan",
            "file": "drivers/pci/endpoint/functions/pci-epf-test.c"
        }
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "88338841766157995827596874544722982704",
                "263431307928327410974748723613766239403",
                "326017850149172471781519232617685933718",
                "210676927539530588464029083280952117613",
                "23803278029740487989320947573853489140",
                "69851593220146005959690359714556192207",
                "211931654766101652462147383295876641610",
                "90478109281078936140143564163669095503",
                "209604917952259312821604324425572908138",
                "329523941686747305592492529127657588259",
                "176578384990158174509748269150968244117"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2025-40032-dc6cd04d",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@6411f840a9b5c47c00ca8e004733de232553870d",
        "signature_type": "Line",
        "target": {
            "file": "drivers/pci/endpoint/functions/pci-epf-test.c"
        }
    },
    {
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "function_hash": "21354816967218049354477074209518279104",
            "length": 311.0
        },
        "id": "CVE-2025-40032-dd2370ed",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba",
        "signature_type": "Function",
        "target": {
            "function": "pci_epf_test_clean_dma_chan",
            "file": "drivers/pci/endpoint/functions/pci-epf-test.c"
        }
    }
]

Linux / Kernel

Package

Name: Kernel

Affected ranges

Type: ECOSYSTEM
Events: Introduced

5.7.0

Fixed

6.1.157

Type: ECOSYSTEM
Events: Introduced

6.2.0

Fixed

6.6.113

Type: ECOSYSTEM
Events: Introduced

6.7.0

Fixed

6.12.54

Type: ECOSYSTEM
Events: Introduced

6.13.0

Fixed

6.17.3