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kernel: don't umount for process in global namespace

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tiann
2023-05-12 12:32:35 +08:00
parent 009a479c17
commit 294d6fa05e
1 changed files with 6 additions and 0 deletions
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6
kernel/core_hook.c
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@@ -5,6 +5,7 @@
#include "linux/kernel.h" #include "linux/kernel.h"
#include "linux/kprobes.h" #include "linux/kprobes.h"
#include "linux/lsm_hooks.h" #include "linux/lsm_hooks.h"
#include "linux/nsproxy.h"
#include "linux/path.h" #include "linux/path.h"
#include "linux/printk.h" #include "linux/printk.h"
#include "linux/uaccess.h" #include "linux/uaccess.h"
@@ -364,6 +365,11 @@ static bool should_umount(struct path *path)
return false; return false;
} }
if (current->nsproxy->mnt_ns == init_nsproxy.mnt_ns) {
pr_info("ignore global mnt namespace process: %d\n", current_uid().val);
return false;
}
if (path->mnt && path->mnt->mnt_sb && path->mnt->mnt_sb->s_type) { if (path->mnt && path->mnt->mnt_sb && path->mnt->mnt_sb->s_type) {
const char *fstype = path->mnt->mnt_sb->s_type->name; const char *fstype = path->mnt->mnt_sb->s_type->name;
return strcmp(fstype, "overlay") == 0; return strcmp(fstype, "overlay") == 0;