Hello, On commit 8005c49d9aea74d382f474ce11afbbc7d7130bec (Nov 15). The program is: // autogenerated by syzkaller (http://github.com/google/syzkaller) #include <syscall.h> #include <string.h> #include <stdint.h> int main() { long r0 = syscall(SYS_socket, 0x10ul, 0x2ul, 0x0ul, 0, 0, 0); long r1 = syscall(SYS_mmap, 0x20000000ul, 0x1000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); long r2 = syscall(SYS_mmap, 0x20001000ul, 0x1000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); *(uint64_t*)0x2000153f = 0x20001f99; *(uint64_t*)0x20001547 = 0x67; *(uint64_t*)0x2000154f = 0x20001fa5; *(uint64_t*)0x20001557 = 0x5b; *(uint64_t*)0x2000155f = 0x20001000; *(uint64_t*)0x20001567 = 0x6; long r9 = syscall(SYS_readv, r0, 0x2000153ful, 0x3ul, 0, 0, 0); long r10 = syscall(SYS_mmap, 0x20002000ul, 0x1000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); memcpy((void*)0x20002000, "\x65\x74\x68\x31\x00", 5); long r12 = syscall(SYS_memfd_create, 0x20002000ul, 0x1ul, 0, 0, 0, 0); long r13 = syscall(SYS_fallocate, r12, 0x0ul, 0x5616e07ul, 0x1ul, 0, 0); memcpy((void*)0x20000da2, "\x02\xbe\x98\x59\x88\xb1\x7b\xfd\xe6\x27\x95\xdc\x18\x4e\x04\x87\x28\x1a\xd0\x30\x52\xcd\xa5\xee\x09\x7f\xfa\x7a\x9b\x72\x17\xfa\x2a\xa1\xe1\x60\x09\xbb\xaf\xdd\x0b\x5c\xa8\x18\x81\x4b\x6d\x42\x11\x20\x4a\xd7\x9e\x86\x8b\x63\xd2\x36\xbf\x5f\xb0\x36\x13\x82\x79\xc8\x31\x3b\x3b\x1e", 70); memcpy((void*)0x200008b7, "\x0a\x00\x33\xe8\x3d\xe7\x4a\xcc\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\xbf\xce\xa1\x60", 28); long r16 = syscall(SYS_sendto, r0, 0x20000da2ul, 0x46ul, 0x8000ul, 0x200008b7ul, 0x1cul); long r17 = syscall(SYS_sendfile, r0, r12, 0x20000000ul, 0x4785d2c1ul, 0, 0); return 0; } It hangs in unkillable state. It is probably similar issue to the other reported issues related to sendfile: https://groups.google.com/forum/#!topic/syzkaller/zfuHHRXL7Zg https://groups.google.com/forum/#!topic/syzkaller/sjA9DrBQviw However this one also blankets dmesg with zillions of: [ 1682.801412] SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket [ 1682.803565] SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket [ 1682.804991] SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket The program should be killable. Thank you -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html