Hello, syzbot found the following issue on: HEAD commit: a5541c0811a0 Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=15a11934480000 kernel config: https://syzkaller.appspot.com/x/.config?x=cbd4e584773e9397 dashboard link: https://syzkaller.appspot.com/bug?extid=2286d16a0b79933453e5 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14fe2f2a480000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10badc54480000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/4b7702208fb9/disk-a5541c08.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9ec0153ec051/vmlinux-a5541c08.xz kernel image: https://storage.googleapis.com/syzbot-assets/6f8725ad290a/Image-a5541c08.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2286d16a0b79933453e5@xxxxxxxxxxxxxxxxxxxxxxxxx ====================================================== WARNING: possible circular locking dependency detected 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Not tainted ------------------------------------------------------ syz-executor742/13012 is trying to acquire lock: ffff0000c7f2a100 (&rm->m_rs_lock){..-.}-{2:2}, at: rds_message_purge+0x4c/0x5c4 net/rds/message.c:138 but task is already holding lock: ffff0000cc450d70 (&rs->rs_recv_lock){...-}-{2:2}, at: rds_clear_recv_queue+0x34/0x1a4 net/rds/recv.c:761 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&rs->rs_recv_lock){...-}-{2:2}: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x7c/0xc4 kernel/locking/spinlock.c:236 rds_wake_sk_sleep+0x28/0x88 net/rds/af_rds.c:109 rds_send_remove_from_sock+0xcc/0x564 net/rds/send.c:634 rds_send_path_drop_acked+0x1ac/0x1e8 net/rds/send.c:710 rds_tcp_write_space+0xcc/0x2f0 net/rds/tcp_send.c:198 tcp_new_space net/ipv4/tcp_input.c:5471 [inline] tcp_check_space+0x178/0x1c0 net/ipv4/tcp_input.c:5490 tcp_data_snd_check net/ipv4/tcp_input.c:5499 [inline] tcp_rcv_established+0x6e4/0xa64 net/ipv4/tcp_input.c:6007 tcp_v4_do_rcv+0x4b8/0x51c net/ipv4/tcp_ipv4.c:1670 sk_backlog_rcv include/net/sock.h:1109 [inline] __release_sock+0xe4/0x1d0 net/core/sock.c:2906 release_sock+0x40/0x108 net/core/sock.c:3462 tcp_sock_set_cork+0xb4/0xc8 net/ipv4/tcp.c:3340 rds_tcp_xmit_path_complete+0x2c/0x3c net/rds/tcp_send.c:52 rds_send_xmit+0xa40/0xfcc net/rds/send.c:422 rds_sendmsg+0xd20/0xf28 net/rds/send.c:1382 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x1e4/0x280 net/socket.c:2117 __do_sys_sendto net/socket.c:2129 [inline] __se_sys_sendto net/socket.c:2125 [inline] __arm64_sys_sendto+0x30/0x44 net/socket.c:2125 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x140 arch/arm64/kernel/syscall.c:197 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 -> #0 (&rm->m_rs_lock){..-.}-{2:2}: check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x1530/0x3084 kernel/locking/lockdep.c:5055 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162 rds_message_purge+0x4c/0x5c4 net/rds/message.c:138 rds_message_put+0x88/0x120 net/rds/message.c:180 rds_loop_inc_free+0x20/0x30 net/rds/loop.c:115 rds_inc_put net/rds/recv.c:82 [inline] rds_clear_recv_queue+0xf0/0x1a4 net/rds/recv.c:767 rds_release+0x54/0x19c net/rds/af_rds.c:73 __sock_release net/socket.c:650 [inline] sock_close+0x50/0xf0 net/socket.c:1365 __fput+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1132 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rs->rs_recv_lock); lock(&rm->m_rs_lock); lock(&rs->rs_recv_lock); lock(&rm->m_rs_lock); *** DEADLOCK *** 2 locks held by syz-executor742/13012: #0: ffff0000ce4baa50 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #0: ffff0000ce4baa50 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:649 [inline] #0: ffff0000ce4baa50 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x40/0xf0 net/socket.c:1365 #1: ffff0000cc450d70 (&rs->rs_recv_lock){...-}-{2:2}, at: rds_clear_recv_queue+0x34/0x1a4 net/rds/recv.c:761 stack backtrace: CPU: 0 PID: 13012 Comm: syz-executor742 Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:156 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:163 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_circular_bug+0x2c4/0x2c8 kernel/locking/lockdep.c:2055 check_noncircular+0x14c/0x154 kernel/locking/lockdep.c:2177 check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x1530/0x3084 kernel/locking/lockdep.c:5055 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162 rds_message_purge+0x4c/0x5c4 net/rds/message.c:138 rds_message_put+0x88/0x120 net/rds/message.c:180 rds_loop_inc_free+0x20/0x30 net/rds/loop.c:115 rds_inc_put net/rds/recv.c:82 [inline] rds_clear_recv_queue+0xf0/0x1a4 net/rds/recv.c:767 rds_release+0x54/0x19c net/rds/af_rds.c:73 __sock_release net/socket.c:650 [inline] sock_close+0x50/0xf0 net/socket.c:1365 __fput+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1132 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 --- This report is generated by a bot. 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