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=124dd2a2480000 kernel config: https://syzkaller.appspot.com/x/.config?x=cbd4e584773e9397 dashboard link: https://syzkaller.appspot.com/bug?extid=52866e24647f9a23403f 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=10d322e0480000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1208adc4480000 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+52866e24647f9a23403f@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ Looking for class "l2tp_sock" with key l2tp_socket_class, but found a different class "slock-AF_INET6" with the same key WARNING: CPU: 0 PID: 24577 at kernel/locking/lockdep.c:940 look_up_lock_class+0x158/0x160 Modules linked in: CPU: 0 PID: 24577 Comm: syz-executor105 Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : look_up_lock_class+0x158/0x160 lr : look_up_lock_class+0x154/0x160 kernel/locking/lockdep.c:937 sp : ffff800014a7b980 x29: ffff800014a7b980 x28: 0000000000000000 x27: 0000000000000000 x26: ffff0000d0864bb0 x25: ffff80000b22ff14 x24: 0000000000000000 x23: ffff80000eec8000 x22: 0000000000000001 x21: ffff80000f1c3018 x20: 0000000000000000 x19: ffff80000dc27c18 x18: 0000000000000000 x17: 6f6620747562202c x16: 7373616c635f7465 x15: 6b636f735f707432 x14: 6c2079656b206874 x13: 205d373735343254 x12: 5b5d313634303832 x11: ff808000081c4d64 x10: 0000000000000000 x9 : ad3022ef6adb7200 x8 : ad3022ef6adb7200 x7 : 545b5d3136343038 x6 : ffff80000c091ebc x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000100000201 x0 : ffff80000dc27c18 Call trace: look_up_lock_class+0x158/0x160 register_lock_class+0x4c/0x2f8 kernel/locking/lockdep.c:1289 __lock_acquire+0xa8/0x3084 kernel/locking/lockdep.c:4934 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x54/0x6c kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:355 [inline] lock_sock_nested+0x88/0xd8 net/core/sock.c:3450 lock_sock include/net/sock.h:1721 [inline] inet_autobind net/ipv4/af_inet.c:177 [inline] inet_send_prepare+0x70/0xf4 net/ipv4/af_inet.c:813 inet6_sendmsg+0x30/0x80 net/ipv6/af_inet6.c:660 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 irq event stamp: 162 hardirqs last enabled at (161): [<ffff800008038a7c>] local_daif_restore arch/arm64/include/asm/daifflags.h:75 [inline] hardirqs last enabled at (161): [<ffff800008038a7c>] el0_svc_common+0x40/0x220 arch/arm64/kernel/syscall.c:107 hardirqs last disabled at (160): [<ffff80000c0844f4>] el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 softirqs last enabled at (156): [<ffff80000801c82c>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (162): [<ffff80000b22ff14>] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (162): [<ffff80000b22ff14>] lock_sock_nested+0x88/0xd8 net/core/sock.c:3450 ---[ end trace 0000000000000000 ]--- --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
