n the Linux kernel, the following vulnerability has been resolved: gpiolib: fix memory leak in gpiochip_setup_dev() Here is a backtrace report about memory leak detected in gpiochip_setup_dev(): unreferenced object 0xffff88810b406400 (size 512): comm "python3", pid 1682, jiffies 4295346908 (age 24.090s) backtrace: kmalloc_trace device_add device_private_init at drivers/base/core.c:3361 (inlined by) device_add at drivers/base/core.c:3411 cdev_device_add gpiolib_cdev_register gpiochip_setup_dev gpiochip_add_data_with_key gcdev_register() & gcdev_unregister() would call device_add() & device_del() (no matter CONFIG_GPIO_CDEV is enabled or not) to register/unregister device. However, if device_add() succeeds, some resource (like struct device_private allocated by device_private_init()) is not released by device_del(). Therefore, after device_add() succeeds by gcdev_register(), it needs to call put_device() to release resource in the error handle path. Here we move forward the register of release function, and let it release every piece of resource by put_device() instead of kfree(). While at it, fix another subtle issue, i.e. when gc->ngpio is equal to 0, we still call kcalloc() and, in case of further error, kfree() on the ZERO_PTR pointer, which is not NULL. It's not a bug per se, but rather waste of the resources and potentially wrong expectation about contents of the gdev->descs variable.
Configuration 1 (hide)
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25 Oct 2024, 18:48
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.1:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.1:rc8:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.1:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:* |
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| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CWE | CWE-401 | |
| First Time |
Linux
Linux linux Kernel |
|
| References | () https://git.kernel.org/stable/c/371363716398ed718e389bea8c5e9843a79dde4e - Patch | |
| References | () https://git.kernel.org/stable/c/6daaa84b621485fe28c401be18debf92ae8ef04a - Patch | |
| References | () https://git.kernel.org/stable/c/ec851b23084b3a0af8bf0f5e51d33a8d678bdc49 - Patch |
23 Oct 2024, 15:13
| Type | Values Removed | Values Added |
|---|---|---|
| Summary |
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21 Oct 2024, 20:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Published : 2024-10-21 20:15
Updated : 2024-10-25 18:48
NVD link : CVE-2022-48975
Mitre link : CVE-2022-48975
CVE.ORG link : CVE-2022-48975
JSON object : View
Missing Release of Memory after Effective Lifetime