Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix subbuf resize races with trace_pipe_raw readers Concurrent subbuffer resizes may crash trace_pipe_raw readers or leak uninitialized memory to userspace due to stale size values. Modify ring_buffer_alloc_read_page() to handle the resizing of an existing buffer_data_read_page if necessary and add a new ring_buffer_read_page_size(). This new function enables ring-buffer buffer_data_read_page users to not call the racy ring_buffer_subbuf_size_get(). This makes the spare_size member of ftrace_buffer_info redundant. Finally, handle buffer_data_read_page/reader_page order discrepancy in ring_buffer_read_page(). On a mismatch simply copy manually the data to the buffer_data_read_page.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected bce761d757452ba5eb77e11fecc37a04b67494e7 before 574efd988d116bd56ac688ab2d64e06ba0da982a; affected bce761d757452ba5eb77e11fecc37a04b67494e7 before 3f30b2cd4eba45c05f822f03f1b0f4077d6d4dc3; affected bce761d757452ba5eb77e11fecc37a04b67494e7 before 75b37b8369778b69ce9738d1c97685a1615cb252; affected bce761d757452ba5eb77e11fecc37a04b67494e7 before dae8dda341d2d9034a90d59e8a7d502e1263813f |
| Linux / Linux | affected 6.8; unaffected 0 before 6.8; unaffected 6.12.114 through 6.12.*; unaffected 6.18.57 through 6.18.*; unaffected 7.2.7 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.