imrcpan/erofs-linux
1
0 Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git synced 2026-10-29 21:33:00 +01:00
Code Issues Packages Projects Releases Wiki Activity

ring-buffer: Fix to update per-subbuf entries of persistent ring buffer

Browse Source 
Since the validation loop in rb_meta_validate_events() updates the same
cpu_buffer->head_page->entries, the other subbuf entries are not updated.
Fix to use head_page to update the entries field, since it is the cursor
in this loop.

Cc: [email protected]
Cc: Mathieu Desnoyers <[email protected]>
Cc: Ian Rogers <[email protected]>
Fixes: 5f3b6e839f ("ring-buffer: Validate boot range memory events")
Link: https://patch.msgid.link/177391153882.193994.17158784065013676533.stgit@mhiramat.tok.corp.google.com
Signed-off-by: Masami Hiramatsu (Google) <[email protected]>
Signed-off-by: Steven Rostedt (Google) <[email protected]>
This commit is contained in:
Masami Hiramatsu (Google) authored and Steven Rostedt (Google) committed 2026-03-21 16:47:28 -04:00
1 parent 07183aac4a
commit f35dbac694
1 file changed
+1 -1
Download Patch File Download Diff File Expand all files Collapse all files
kernel/trace/ring_buffer.c
+1 -1
View File
@@ -2053,7 +2053,7 @@ static void rb_meta_validate_events(struct ring_buffer_per_cpu *cpu_buffer)
entries += ret;
entry_bytes += local_read(&head_page->page->commit);
local_set(&cpu_buffer->head_page->entries, ret);
local_set(&head_page->entries, ret);
if (head_page == cpu_buffer->commit_page)
break;