device gtp2 entered promiscuous mode IPv6: ADDRCONF(NETDEV_CHANGE): gtp2: link becomes ready ====================================================== WARNING: possible circular locking dependency detected 4.14.295-syzkaller #0 Not tainted ------------------------------------------------------ kworker/u4:4/2850 is trying to acquire lock: ((&(&cp->cp_send_w)->work)){+.+.}, at: [] flush_work+0x88/0x770 kernel/workqueue.c:2887 but task is already holding lock: (k-sk_lock-AF_INET){+.+.}, at: [] lock_sock include/net/sock.h:1473 [inline] (k-sk_lock-AF_INET){+.+.}, at: [] rds_tcp_reset_callbacks+0x181/0x450 net/rds/tcp.c:165 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (k-sk_lock-AF_INET){+.+.}: lock_sock_nested+0xb7/0x100 net/core/sock.c:2813 lock_sock include/net/sock.h:1473 [inline] do_tcp_setsockopt.constprop.0+0xfb/0x1c10 net/ipv4/tcp.c:2564 tcp_setsockopt net/ipv4/tcp.c:2832 [inline] tcp_setsockopt+0xa7/0xc0 net/ipv4/tcp.c:2824 kernel_setsockopt+0xfb/0x1b0 net/socket.c:3396 rds_tcp_cork net/rds/tcp_send.c:43 [inline] rds_tcp_xmit_path_prepare+0xaf/0xe0 net/rds/tcp_send.c:50 rds_send_xmit+0x1ae/0x1c00 net/rds/send.c:187 rds_send_worker+0x6d/0x240 net/rds/threads.c:189 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 -> #0 ((&(&cp->cp_send_w)->work)){+.+.}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 flush_work+0xad/0x770 kernel/workqueue.c:2890 __cancel_work_timer+0x321/0x460 kernel/workqueue.c:2965 rds_tcp_reset_callbacks+0x18d/0x450 net/rds/tcp.c:167 rds_tcp_accept_one+0x61a/0x8b0 net/rds/tcp_listen.c:194 rds_tcp_accept_worker+0x4d/0x70 net/rds/tcp.c:407 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(k-sk_lock-AF_INET); lock((&(&cp->cp_send_w)->work)); lock(k-sk_lock-AF_INET); lock((&(&cp->cp_send_w)->work)); *** DEADLOCK *** 4 locks held by kworker/u4:4/2850: #0: ("%s""krdsd"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: ((&rtn->rds_tcp_accept_w)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 #2: (&tc->t_conn_path_lock){+.+.}, at: [] rds_tcp_accept_one+0x502/0x8b0 net/rds/tcp_listen.c:186 #3: (k-sk_lock-AF_INET){+.+.}, at: [] lock_sock include/net/sock.h:1473 [inline] #3: (k-sk_lock-AF_INET){+.+.}, at: [] rds_tcp_reset_callbacks+0x181/0x450 net/rds/tcp.c:165 stack backtrace: CPU: 0 PID: 2850 Comm: kworker/u4:4 Not tainted 4.14.295-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: krdsd rds_tcp_accept_worker Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 flush_work+0xad/0x770 kernel/workqueue.c:2890 __cancel_work_timer+0x321/0x460 kernel/workqueue.c:2965 rds_tcp_reset_callbacks+0x18d/0x450 net/rds/tcp.c:167 rds_tcp_accept_one+0x61a/0x8b0 net/rds/tcp_listen.c:194 rds_tcp_accept_worker+0x4d/0x70 net/rds/tcp.c:407 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 REISERFS warning (device loop2): super-6502 reiserfs_getopt: unknown mount option "" REISERFS warning (device loop2): super-6502 reiserfs_getopt: unknown mount option "" REISERFS warning (device loop2): super-6502 reiserfs_getopt: unknown mount option "" REISERFS warning (device loop2): super-6502 reiserfs_getopt: unknown mount option "" BTRFS: device fsid 5bc4d2ca-4c15-4771-a955-a99d043db860 devid 1 transid 8 /dev/loop3 BTRFS info (device loop3): unrecognized mount option 'noenosqc_debuger' BTRFS error (device loop3): open_ctree failed BTRFS info (device loop3): using free space tree BTRFS info (device loop3): has skinny extents Unknown ioctl -1072131211 EXT4-fs: Warning: mounting with data=journal disables delayed allocation and O_DIRECT support! EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode EXT4-fs (loop0): Unsupported blocksize for fs encryption Unknown ioctl -1072131211 Unknown ioctl -1072131211 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root Unknown ioctl -1072131211 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root Unknown ioctl -1072131211 EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode Unknown ioctl -1072131211 BTRFS info (device loop3): unrecognized mount option 'noenosqc_debuger' EXT4-fs (loop0): Unsupported blocksize for fs encryption ISO 9660 Extensions: Microsoft Joliet Level 3 Unknown ioctl -1072131211 ISOFS: changing to secondary root BTRFS error (device loop3): open_ctree failed BTRFS info (device loop3): using free space tree BTRFS info (device loop3): has skinny extents EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root Unknown ioctl -1072131211 EXT4-fs (loop0): Unsupported blocksize for fs encryption BTRFS info (device loop3): using free space tree audit: type=1800 audit(1666091317.337:116): pid=13797 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="bus" dev="sda1" ino=14010 res=0 Unknown ioctl -1072131211 audit: type=1800 audit(1666091317.377:117): pid=13797 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="bus" dev="sda1" ino=14010 res=0 EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode EXT4-fs (loop0): Unsupported blocksize for fs encryption Unknown ioctl -1072131211 BTRFS info (device loop5): unrecognized mount option 'noenosqc_debuger' BTRFS error (device loop5): open_ctree failed audit: type=1800 audit(1666091317.767:118): pid=13842 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="bus" dev="sda1" ino=14026 res=0 audit: type=1800 audit(1666091317.767:119): pid=13842 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="bus" dev="sda1" ino=14026 res=0 BTRFS info (device loop5): unrecognized mount option 'noenosqc_debuger' audit: type=1800 audit(1666091317.777:120): pid=13843 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="bus" dev="sda1" ino=14025 res=0 audit: type=1800 audit(1666091317.777:121): pid=13843 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="bus" dev="sda1" ino=14025 res=0 audit: type=1800 audit(1666091317.847:122): pid=13851 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=14019 res=0 BTRFS error (device loop5): open_ctree failed audit: type=1800 audit(1666091317.847:123): pid=13851 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=14019 res=0 BTRFS info (device loop5): using free space tree BTRFS info (device loop5): has skinny extents audit: type=1800 audit(1666091317.927:124): pid=13864 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="bus" dev="sda1" ino=14030 res=0 audit: type=1800 audit(1666091317.927:125): pid=13864 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="bus" dev="sda1" ino=14030 res=0