CVE-2024-57930

In the Linux kernel, the following vulnerability has been resolved: tracing: Have process_string() also allow arrays In order to catch a common bug where a TRACE_EVENT() TP_fast_assign() assigns an address of an allocated string to the ring buffer and then references it in TP_printk(), which can be executed hours later when the string is free, the function test_event_printk() runs on all events as they are registered to make sure there's no unwanted dereferencing. It calls process_string() to handle cases in TP_printk() format that has "%s". It returns whether or not the string is safe. But it can have some false positives. For instance, xe_bo_move() has: TP_printk("move_lacks_source:%s, migrate object %p [size %zu] from %s to %s device_id:%s", __entry->move_lacks_source ? "yes" : "no", __entry->bo, __entry->size, xe_mem_type_to_name[__entry->old_placement], xe_mem_type_to_name[__entry->new_placement], __get_str(device_id)) Where the "%s" references into xe_mem_type_to_name[]. This is an array of pointers that should be safe for the event to access. Instead of flagging this as a bad reference, if a reference points to an array, where the record field is the index, consider it safe.

• https://git.kernel.org/stable/c/3bcdc9039a6e9e6e47ed689a37b8d57894a3c571Patch
• https://git.kernel.org/stable/c/631b1e09e213c86d5a4ce23d45c81af473bb0ac7Patch
• https://git.kernel.org/stable/c/92bd18c74624e5eb9f96e70076aa46293f4b626fPatch
• https://git.kernel.org/stable/c/a64e5295ebc4afdefe69cdf16cc286a60ff8ba4bPatch
• https://git.kernel.org/stable/c/afc6717628f959941d7b33728570568b4af1c4b8Patch
• https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

Published

Jan 21, 2025

Last Modified

Jun 17, 2026

Status

Modified

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