cve-2021-47455
Vulnerability from cvelistv5
Published
2024-05-22 06:19
Modified
2024-12-19 07:42
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ptp: Fix possible memory leak in ptp_clock_register() I got memory leak as follows when doing fault injection test: unreferenced object 0xffff88800906c618 (size 8): comm "i2c-idt82p33931", pid 4421, jiffies 4294948083 (age 13.188s) hex dump (first 8 bytes): 70 74 70 30 00 00 00 00 ptp0.... backtrace: [<00000000312ed458>] __kmalloc_track_caller+0x19f/0x3a0 [<0000000079f6e2ff>] kvasprintf+0xb5/0x150 [<0000000026aae54f>] kvasprintf_const+0x60/0x190 [<00000000f323a5f7>] kobject_set_name_vargs+0x56/0x150 [<000000004e35abdd>] dev_set_name+0xc0/0x100 [<00000000f20cfe25>] ptp_clock_register+0x9f4/0xd30 [ptp] [<000000008bb9f0de>] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33] When posix_clock_register() returns an error, the name allocated in dev_set_name() will be leaked, the put_device() should be used to give up the device reference, then the name will be freed in kobject_cleanup() and other memory will be freed in ptp_clock_release().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8
Impacted products
Vendor Product Version
Linux Linux Version: 5.5
Show details on NVD website

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    "dateReserved": "2024-05-21T14:58:30.833Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47455\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-22T07:15:10.530\",\"lastModified\":\"2024-11-21T06:36:10.873\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nptp: Fix possible memory leak in ptp_clock_register()\\n\\nI got memory leak as follows when doing fault injection test:\\n\\nunreferenced object 0xffff88800906c618 (size 8):\\n  comm \\\"i2c-idt82p33931\\\", pid 4421, jiffies 4294948083 (age 13.188s)\\n  hex dump (first 8 bytes):\\n    70 74 70 30 00 00 00 00                          ptp0....\\n  backtrace:\\n    [\u003c00000000312ed458\u003e] __kmalloc_track_caller+0x19f/0x3a0\\n    [\u003c0000000079f6e2ff\u003e] kvasprintf+0xb5/0x150\\n    [\u003c0000000026aae54f\u003e] kvasprintf_const+0x60/0x190\\n    [\u003c00000000f323a5f7\u003e] kobject_set_name_vargs+0x56/0x150\\n    [\u003c000000004e35abdd\u003e] dev_set_name+0xc0/0x100\\n    [\u003c00000000f20cfe25\u003e] ptp_clock_register+0x9f4/0xd30 [ptp]\\n    [\u003c000000008bb9f0de\u003e] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33]\\n\\nWhen posix_clock_register() returns an error, the name allocated\\nin dev_set_name() will be leaked, the put_device() should be used\\nto give up the device reference, then the name will be freed in\\nkobject_cleanup() and other memory will be freed in ptp_clock_release().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ptp: solucione una posible p\u00e9rdida de memoria en ptp_clock_register() Obtuve una p\u00e9rdida de memoria de la siguiente manera al realizar la prueba de inyecci\u00f3n de fallas: objeto sin referencia 0xffff88800906c618 (tama\u00f1o 8): comm \\\"i2c-idt82p33931\\\", pid 4421, jiffies 4294948083 (edad 13,188 s) volcado hexadecimal (primeros 8 bytes): 70 74 70 30 00 00 00 00 ptp0.... backtrace: [\u0026lt;00000000312ed458\u0026gt;] __kmalloc_track_caller+0x19f/0x3a0 [\u0026lt;0000 000079f6e2ff\u0026gt;] kvasprintf+0xb5 /0x150 [\u0026lt;0000000026aae54f\u0026gt;] kvasprintf_const+0x60/0x190 [\u0026lt;00000000f323a5f7\u0026gt;] kobject_set_name_vargs+0x56/0x150 [\u0026lt;000000004e35abdd\u0026gt;] dev_set_name+0xc0/0x100 0000000f20cfe25\u0026gt;] ptp_clock_register+0x9f4/0xd30 [ptp] [\u0026lt;000000008bb9f0de\u0026gt;] idt82p33_probe.cold+0x8b6/0x1561 [ptp_idt82p33] Cuando posix_clock_register() devuelve un error, el nombre asignado en dev_set_name() se filtrar\u00e1, se debe usar put_device() para renunciar a la referencia del dispositivo, luego el nombre se liberar\u00e1 kobject_cleanup() y otra memoria se liberar\u00e1n en ptp_clock_release().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4225fea1cb28370086e17e82c0f69bec2779dca0\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/95c0a0c5ec8839f8f21672be786e87a100319ca8\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
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