github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 09:36:22 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

perf tools: Use snprintf() in dso__read_running_kernel_build_id()

Browse Source 
dso__read_running_kernel_build_id() uses sprintf() to format a sysfs
path from machine->root_dir into a PATH_MAX buffer.  If root_dir is
close to PATH_MAX in length, appending "/sys/kernel/notes" (18 bytes)
overflows the stack buffer.

Switch to snprintf() with sizeof(path) to prevent the overflow.

Reported-by: sashiko-bot <sashiko-bot@kernel.org>
Fixes: cdd059d731 ("perf tools: Move dso_* related functions into dso object")
Cc: Jiri Olsa <jolsa@kernel.org>
Assisted-by: Claude:claude-opus-4.6
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2026-06-08 07:04:25 -03:00
parent 34d3d93fac
commit 2ea64782a4
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/perf/util/dso.c
View File

@ -1779,7 +1779,7 @@ void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine)
if (machine__is_default_guest(machine))
return;
sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
snprintf(path, sizeof(path), "%s/sys/kernel/notes", machine->root_dir);
sysfs__read_build_id(path, &bid);
dso__set_build_id(dso, &bid);
}