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CVE-2024-58017 printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX

Description

In the Linux kernel, the following vulnerability has been resolved: printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX Shifting 1 << 31 on a 32-bit int causes signed integer overflow, which leads to undefined behavior. To prevent this, cast 1 to u32 before performing the shift, ensuring well-defined behavior. This change explicitly avoids any potential overflow by ensuring that the shift occurs on an unsigned 32-bit integer.

Affected products and versions

Product Affected versions Fixed in
Linux 6.14 earliest → < 6.14 6.14
Linux 6.13 earliest → < 6.13.3 6.13.3
Linux 6.12 earliest → < 6.12.14 6.12.14
Linux 6.6 earliest → < 6.6.78 6.6.78
Linux 6.1 earliest → < 6.1.129 6.1.129
Linux 5.15 earliest → < 5.15.179 5.15.179
Linux 5.10 earliest → < 5.10.235 5.10.235
Linux 5.4 earliest → < 5.4.291 5.4.291
Linux 4.20 No fix stated
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Product Affected versions Fixed in
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Versions not published
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