sg_write: data in/out 12359/141 bytes for SCSI command 0xff-- guessing data in; program syz-executor0 not setting count and/or reply_len properly ====================================================== [ INFO: possible circular locking dependency detected ] 4.9.108-gb7d377b #47 Not tainted ------------------------------------------------------- syz-executor2/10133 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: 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 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-executor2/10133: #0: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70 stack backtrace: CPU: 1 PID: 10133 Comm: syz-executor2 Not tainted 4.9.108-gb7d377b #47 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff88018467f748 ffffffff81eb3e29 ffffffff855e7840 ffffffff8559cf30 ffffffff855e7840 ffff880184c188e8 ffff880184c18000 ffff88018467f790 ffffffff814262d4 0000000000000001 0000000084c18000 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 blk_update_request: 120 callbacks suppressed blk_update_request: I/O error, dev loop0, sector 0 buffer_io_error: 120 callbacks suppressed Buffer I/O error on dev loop0, logical block 0, lost async page write blk_update_request: I/O error, dev loop0, sector 8 Buffer I/O error on dev loop0, logical block 1, lost async page write blk_update_request: I/O error, dev loop0, sector 16 Buffer I/O error on dev loop0, logical block 2, lost async page write blk_update_request: I/O error, dev loop0, sector 24 Buffer I/O error on dev loop0, logical block 3, lost async page write blk_update_request: I/O error, dev loop0, sector 32 Buffer I/O error on dev loop0, logical block 4, lost async page write blk_update_request: I/O error, dev loop0, sector 40 Buffer I/O error on dev loop0, logical block 5, lost async page write blk_update_request: I/O error, dev loop0, sector 48 Buffer I/O error on dev loop0, logical block 6, lost async page write blk_update_request: I/O error, dev loop0, sector 56 Buffer I/O error on dev loop0, logical block 7, lost async page write blk_update_request: I/O error, dev loop0, sector 64 Buffer I/O error on dev loop0, logical block 8, lost async page write blk_update_request: I/O error, dev loop0, sector 72 Buffer I/O error on dev loop0, logical block 9, lost async page write raw_sendmsg: syz-executor5 forgot to set AF_INET. Fix it! netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. FAT-fs (loop0): bogus number of reserved sectors FAT-fs (loop0): Can't find a valid FAT filesystem FAT-fs (loop0): bogus number of reserved sectors FAT-fs (loop0): Can't find a valid FAT filesystem pktgen: kernel_thread() failed for cpu 0 pktgen: Cannot create thread for cpu 0 (-4) pktgen: kernel_thread() failed for cpu 1 pktgen: Cannot create thread for cpu 1 (-4) pktgen: Initialization failed for all threads IPVS: Creating netns size=2536 id=16 IPVS: Creating netns size=2536 id=17 netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready F2FS-fs (loop4): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop4): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop4): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop4): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop4): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop4): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop4): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'.