From: Oleg Nesterov oleg@redhat.com
mainline inclusion from mainline-v6.7-rc1 commit 7904e53ed5a20fc678c01d5d1b07ec486425bb6a category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9E2EL CVE: CVE-2024-26686
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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do/while_each_thread should be avoided when possible.
Link: https://lkml.kernel.org/r/20230909164501.GA11581@redhat.com Signed-off-by: Oleg Nesterov oleg@redhat.com Cc: Eric W. Biederman ebiederm@xmission.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Zhao Wenhui zhaowenhui8@huawei.com --- fs/proc/array.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/fs/proc/array.c b/fs/proc/array.c index ba0532f9a6f3..08de746fcc90 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -502,12 +502,13 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
/* add up live thread stats at the group level */ if (whole) { - struct task_struct *t = task; - do { + struct task_struct *t; + + __for_each_thread(sig, t) { min_flt += t->min_flt; maj_flt += t->maj_flt; gtime += task_gtime(t); - } while_each_thread(task, t); + }
min_flt += sig->min_flt; maj_flt += sig->maj_flt;