Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
bce761d757452ba5eb77e11fecc37a04b67494e7 to < 574efd988d116bd56ac688ab2d64e06ba0da982aaffectedbce761d757452ba5eb77e11fecc37a04b67494e7 to < 3f30b2cd4eba45c05f822f03f1b0f4077d6d4dc3affectedbce761d757452ba5eb77e11fecc37a04b67494e7 to < 75b37b8369778b69ce9738d1c97685a1615cb252affectedbce761d757452ba5eb77e11fecc37a04b67494e7 to < dae8dda341d2d9034a90d59e8a7d502e1263813faffected
Linux Linux
Default version status: affected
6.8affected0 to < 6.8unaffected6.12.114 to ≤ 6.12.*unaffected6.18.57 to ≤ 6.18.*unaffected7.2.7 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected