cve-2024-49941
Vulnerability from cvelistv5
Published
2024-10-21 18:02
Modified
2024-12-19 09:29
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: gpiolib: Fix potential NULL pointer dereference in gpiod_get_label() In `gpiod_get_label()`, it is possible that `srcu_dereference_check()` may return a NULL pointer, leading to a scenario where `label->str` is accessed without verifying if `label` itself is NULL. This patch adds a proper NULL check for `label` before accessing `label->str`. The check for `label->str != NULL` is removed because `label->str` can never be NULL if `label` is not NULL. This fixes the issue where the label name was being printed as `(efault)` when dumping the sysfs GPIO file when `label == NULL`.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7b99b5ab885993bff010ebcd93be5e511c56e28aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9ee4b907d7a5d7a53b4ff7727c371ff3d44ccbbbPatch
Impacted products
Vendor Product Version
Linux Linux Version: a86d27693066a34a29be86f394bbad847b2d1749
Version: a86d27693066a34a29be86f394bbad847b2d1749
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   Linux Linux Version: 6.9
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpiolib: Fix potential NULL pointer dereference in gpiod_get_label()\n\nIn `gpiod_get_label()`, it is possible that `srcu_dereference_check()` may\nreturn a NULL pointer, leading to a scenario where `label-\u003estr` is accessed\nwithout verifying if `label` itself is NULL.\n\nThis patch adds a proper NULL check for `label` before accessing\n`label-\u003estr`. The check for `label-\u003estr != NULL` is removed because\n`label-\u003estr` can never be NULL if `label` is not NULL.\n\nThis fixes the issue where the label name was being printed as `(efault)`\nwhen dumping the sysfs GPIO file when `label == NULL`."
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      "title": "gpiolib: Fix potential NULL pointer dereference in gpiod_get_label()",
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    "assignerShortName": "Linux",
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    "datePublished": "2024-10-21T18:02:00.361Z",
    "dateReserved": "2024-10-21T12:17:06.043Z",
    "dateUpdated": "2024-12-19T09:29:46.855Z",
    "state": "PUBLISHED"
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