Use struct sctp_sack_info instead SELinux: unrecognized netlink message: protocol=0 nlmsg_type=123 sclass=netlink_route_socket pig=11518 comm=syz-executor0 ============================================ WARNING: possible recursive locking detected 4.13.0-rc6+ #29 Not tainted -------------------------------------------- syz-executor7/11523 is trying to acquire lock: (sk_lock-AF_KCM){+.+.+.}, at: [] lock_sock include/net/sock.h:1459 [inline] (sk_lock-AF_KCM){+.+.+.}, at: [] kcm_sendpage+0x16e/0x1880 net/kcm/kcmsock.c:774 but task is already holding lock: (sk_lock-AF_KCM){+.+.+.}, at: [] lock_sock include/net/sock.h:1459 [inline] (sk_lock-AF_KCM){+.+.+.}, at: [] kcm_sendmsg+0x1ec/0x2200 net/kcm/kcmsock.c:910 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(sk_lock-AF_KCM); lock(sk_lock-AF_KCM); *** DEADLOCK *** May be due to missing lock nesting notation 1 lock held by syz-executor7/11523: #0: (sk_lock-AF_KCM){+.+.+.}, at: [] lock_sock include/net/sock.h:1459 [inline] #0: (sk_lock-AF_KCM){+.+.+.}, at: [] kcm_sendmsg+0x1ec/0x2200 net/kcm/kcmsock.c:910 stack backtrace: CPU: 1 PID: 11523 Comm: syz-executor7 Not tainted 4.13.0-rc6+ #29 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 print_deadlock_bug kernel/locking/lockdep.c:1743 [inline] check_deadlock kernel/locking/lockdep.c:1787 [inline] validate_chain kernel/locking/lockdep.c:2265 [inline] __lock_acquire+0xfac/0x3dc0 kernel/locking/lockdep.c:3367 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3855 lock_sock_nested+0xc2/0x110 net/core/sock.c:2762 lock_sock include/net/sock.h:1459 [inline] kcm_sendpage+0x16e/0x1880 net/kcm/kcmsock.c:774 kernel_sendpage+0x8d/0xe0 net/socket.c:3387 kcm_write_msgs+0x404/0x1b80 net/kcm/kcmsock.c:646 kcm_sendmsg+0x1446/0x2200 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 sock_write_iter+0x31a/0x5d0 net/socket.c:912 call_write_iter include/linux/fs.h:1743 [inline] new_sync_write fs/read_write.c:457 [inline] __vfs_write+0x684/0x970 fs/read_write.c:470 vfs_write+0x189/0x510 fs/read_write.c:518 SYSC_write fs/read_write.c:565 [inline] SyS_write+0xef/0x220 fs/read_write.c:557 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4512e9 RSP: 002b:00007fe9c349ac08 EFLAGS: 00000216 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000007180a8 RCX: 00000000004512e9 RDX: 000000000000009a RSI: 0000000020ef4000 RDI: 000000000000001b RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b92ee R13: 00000000ffffffff R14: 000000000000001b R15: 00000000000089e0 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=11512 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=123 sclass=netlink_route_socket pig=11542 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=11553 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=11578 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=11604 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=11604 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=11627 comm=syz-executor0 selinux_nlmsg_perm: 14 callbacks suppressed SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=14111 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=14164 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=14194 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=14212 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=14277 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=14274 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=14324 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=14338 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=14360 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=14378 comm=syz-executor6