On Thu, Jan 28, 2016 at 11:27:11AM +0100, Dmitry Vyukov wrote: > Hello, > > The following program triggers VM_BUG_ON_PAGE(PageTail(page)): > > // autogenerated by syzkaller (http://github.com/google/syzkaller) > #include <fcntl.h> > #include <numaif.h> > #include <sys/mman.h> > #include <unistd.h> > > int main() > { > int fd; > > mmap((void*)0x20000000, 4096, PROT_READ|PROT_WRITE, > MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0); > fd = open("/dev/sg1", O_RDONLY|O_SYNC|0x100000); > mmap((void*)0x20001000, 0x4000, PROT_READ|PROT_WRITE, > MAP_PRIVATE|MAP_FIXED, fd, 0); > mbind((void*)0x20000000, 0x4000, 0x8002, (void*)0x20002ff8, 3660, > MPOL_MF_STRICT|MPOL_MF_MOVE); > return 0; > } I don't have sg1 in my VM. I changed it to sg0 and it doesn't trigger an issue: mbind() returns -EINVAL as it supposed to. Hm.. -- Kirill A. Shutemov -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>