GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-06 06:21:31 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

tracing/probes: Fix to avoid double count of the string length on the array

Browse source 
[ Upstream commit 66bcf65d6c ]

If an array is specified with the ustring or symstr, the length of the
strings are accumlated on both of 'ret' and 'total', which means the
length is double counted.
Just set the length to the 'ret' value for avoiding double counting.

Link: https://lore.kernel.org/all/168908492917.123124.15076463491122036025.stgit@devnote2/

Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/all/8819b154-2ba1-43c3-98a2-cbde20892023@moroto.mountain/
Fixes: 88903c4643 ("tracing/probe: Add ustring type for user-space string")
Cc: stable@vger.kernel.org
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Masami Hiramatsu (Google) 2023-07-11 23:15:29 +09:00 • committed by Justin Hammond
parent 7817985328
commit 0ffd6da8f8
1 changed files with 2 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

4
kernel/trace/trace_probe_tmpl.h
View file

@ -136,11 +136,11 @@ stage3:
code++;
goto array;
case FETCH_OP_ST_USTRING:
ret += fetch_store_strlen_user(val + code->offset);
ret = fetch_store_strlen_user(val + code->offset);
code++;
goto array;
case FETCH_OP_ST_SYMSTR:
ret += fetch_store_symstrlen(val + code->offset);
ret = fetch_store_symstrlen(val + code->offset);
code++;
goto array;
default: