I got the reproducer down to the following minimal code:
#define _GNU_SOURCE
#include <unistd.h>
#include <sched.h>
#include <sys/wait.h>
#include <sys/mount.h>
int loop(void *arg)
{
for (;;)
mount("/", "/", "", MS_BIND | MS_REC, 0);
return 0;
}
int main()
{
int pid, status;
char stack[65536];
pid = clone(loop, &stack[sizeof(stack)-8], CLONE_NEWUSER | CLONE_NEWNS
| CLONE_NEWPID, 0, 0);
while (waitpid(pid, &status, __WALL) != pid);
return 0;
}
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https://bugs.launchpad.net/bugs/1542010
Title:
add stressors for recursive mounts
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