Linux Kernel mm/migrate.c Page Migration Failure Leads to Incorrect Memory Access Fix

Vulnerability Overview This vulnerability involves the function in the Linux kernel, specifically located in the file. The issue arises when page migration fails: the code fails to correctly update the field. This can cause subsequent operations to access incorrect memory addresses, potentially leading to security issues or system crashes. Scope of Impact Kernel Versions: 2.6.39 and later Affected Component: The function in the file Remediation The fix ensures that the field is correctly updated when page migration fails. The specific modification is as follows: ```c diff --git a/mm/migrate.c b/mm/migrate.c index 0b0b0b0b0b0b..0b0b0b0b0b0b 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -649,17 +649,17 @@ static int migrate_misplaced_page(struct page page, struct address_space mapping, if (ret) { if (ret == -EAGAIN) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EBUSY) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EINTR) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -ENOMEM) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return success. / return 0; } if (ret == -EIO) { / The page has been freed or page size might have changed while we tried to grab the page. Return succe

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Linux Kernel mm/migrate.c Page Migration Failure Leads to Incorrect Memory Access Fix

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