sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 program syz-executor4 is using a deprecated SCSI ioctl, please convert it to SG_IO sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0 ====================================================== [ INFO: possible circular locking dependency detected ] 4.9.110-g00a0bcb #4 Not tainted ------------------------------------------------------- syz-executor6/7558 is trying to acquire lock: (sk_lock-AF_INET){+.+.+.}, at: [] lock_sock include/net/sock.h:1404 [inline] (sk_lock-AF_INET){+.+.+.}, at: [] do_ip_setsockopt.isra.13+0x12a/0x2b10 net/ipv4/ip_sockglue.c:636 but task is already holding lock: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (rtnl_mutex){+.+.+.}: lock_acquire+0x130/0x3e0 kernel/locking/lockdep.c:3756 __mutex_lock_common kernel/locking/mutex.c:521 [inline] mutex_lock_nested+0xc0/0x870 kernel/locking/mutex.c:621 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70 mrtsock_destruct+0x3b/0x1e0 net/ipv4/ipmr.c:1231 ip_ra_control+0x2c2/0x420 net/ipv4/ip_sockglue.c:360 do_ip_setsockopt.isra.13+0x15ff/0x2b10 net/ipv4/ip_sockglue.c:1137 ip_setsockopt+0x3a/0xb0 net/ipv4/ip_sockglue.c:1240 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:833 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:2706 SYSC_setsockopt net/socket.c:1772 [inline] SyS_setsockopt+0x166/0x260 net/socket.c:1751 do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 entry_SYSCALL_64_after_swapgs+0x5d/0xdb -> #0 (sk_lock-AF_INET){+.+.+.}: check_prev_add kernel/locking/lockdep.c:1828 [inline] check_prevs_add kernel/locking/lockdep.c:1938 [inline] validate_chain kernel/locking/lockdep.c:2265 [inline] __lock_acquire+0x3019/0x4070 kernel/locking/lockdep.c:3345 lock_acquire+0x130/0x3e0 kernel/locking/lockdep.c:3756 lock_sock_nested+0xc6/0x120 net/core/sock.c:2511 lock_sock include/net/sock.h:1404 [inline] do_ip_setsockopt.isra.13+0x12a/0x2b10 net/ipv4/ip_sockglue.c:636 ip_setsockopt+0x3a/0xb0 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt+0x88/0xe0 net/ipv4/tcp.c:2758 sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:2706 SYSC_setsockopt net/socket.c:1772 [inline] SyS_setsockopt+0x166/0x260 net/socket.c:1751 do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 entry_SYSCALL_64_after_swapgs+0x5d/0xdb other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock(sk_lock-AF_INET); lock(rtnl_mutex); lock(sk_lock-AF_INET); *** DEADLOCK *** 1 lock held by syz-executor6/7558: #0: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70 stack backtrace: CPU: 1 PID: 7558 Comm: syz-executor6 Not tainted 4.9.110-g00a0bcb #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff88019db07748 ffffffff81eb2329 ffffffff855e79b0 ffffffff8559cef0 ffffffff855e79b0 ffff8801bc3cd0e8 ffff8801bc3cc800 ffff88019db07790 ffffffff814262d4 0000000000000001 00000000bc3cc800 0000000000000001 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_circular_bug.cold.51+0x1bd/0x27d kernel/locking/lockdep.c:1202 [] check_prev_add kernel/locking/lockdep.c:1828 [inline] [] check_prevs_add kernel/locking/lockdep.c:1938 [inline] [] validate_chain kernel/locking/lockdep.c:2265 [inline] [] __lock_acquire+0x3019/0x4070 kernel/locking/lockdep.c:3345 [] lock_acquire+0x130/0x3e0 kernel/locking/lockdep.c:3756 [] lock_sock_nested+0xc6/0x120 net/core/sock.c:2511 [] lock_sock include/net/sock.h:1404 [inline] [] do_ip_setsockopt.isra.13+0x12a/0x2b10 net/ipv4/ip_sockglue.c:636 [] ip_setsockopt+0x3a/0xb0 net/ipv4/ip_sockglue.c:1240 [] tcp_setsockopt+0x88/0xe0 net/ipv4/tcp.c:2758 [] sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:2706 [] SYSC_setsockopt net/socket.c:1772 [inline] [] SyS_setsockopt+0x166/0x260 net/socket.c:1751 [] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb binder: 7547:7556 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 7547:7556 got transaction to invalid handle binder: 7547:7556 transaction failed 29201/-22, size 0-0 line 3018 binder: 7547:7556 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 7547:7556 got transaction to invalid handle binder: 7547:7556 transaction failed 29201/-22, size 0-0 line 3018 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29201 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=75 sclass=netlink_route_socket pig=7511 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=49639 sclass=netlink_route_socket pig=7511 comm=syz-executor2 selinux_nlmsg_perm: 7621 callbacks suppressed SELinux: unrecognized netlink message: protocol=0 nlmsg_type=71 sclass=netlink_route_socket pig=7910 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=7910 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=13387 sclass=netlink_route_socket pig=7910 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=7910 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=7910 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=258 sclass=netlink_route_socket pig=7955 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65305 sclass=netlink_route_socket pig=7955 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=33929 sclass=netlink_route_socket pig=7955 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=11395 sclass=netlink_route_socket pig=7955 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=22333 sclass=netlink_route_socket pig=7955 comm=syz-executor2