Hello, syzbot found the following issue on: HEAD commit: 95b39f07 net: ethernet: mtk-star-emac: fix wrong unmap in .. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=13658a5cd00000 kernel config: https://syzkaller.appspot.com/x/.config?x=e2d5ba72abae4f14 dashboard link: https://syzkaller.appspot.com/bug?extid=582be673ab4f59f68c5e Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+582be673ab4f59f68c5e@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xf7775c0000001777: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0xbbbb00000000bbb8-0xbbbb00000000bbbf] CPU: 0 PID: 6057 Comm: kworker/0:6 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events l2cap_chan_timeout RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51 Code: 0f 84 af d4 08 05 48 b8 22 01 00 00 00 00 ad de 49 39 c4 0f 84 b0 d4 08 05 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 67 d4 08 05 49 8d 7d RSP: 0018:ffffc90002bafb28 EFLAGS: 00010a06 RAX: dffffc0000000000 RBX: ffff8880283424b8 RCX: 0000000000000000 RDX: 1777600000001777 RSI: ffffffff87ebecff RDI: ffff8880283424c0 RBP: ffff8880283424b8 R08: ffffffff8a7af760 R09: ffffffff87f99626 R10: 0000000000000004 R11: 0000000000000005 R12: bbbb00000000bbbb R13: bb00000000000000 R14: ffff888028341020 R15: 0000000000000005 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002349848 CR3: 0000000018f19000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry include/linux/list.h:132 [inline] list_del_init include/linux/list.h:204 [inline] bt_accept_unlink+0x35/0x2f0 net/bluetooth/af_bluetooth.c:187 l2cap_sock_teardown_cb+0x197/0x660 net/bluetooth/l2cap_sock.c:1542 l2cap_chan_del+0xbc/0xa80 net/bluetooth/l2cap_core.c:618 l2cap_chan_close+0x1bc/0xaf0 net/bluetooth/l2cap_core.c:823 l2cap_chan_timeout+0x17e/0x2f0 net/bluetooth/l2cap_core.c:436 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Modules linked in: ---[ end trace 7d7f7782958a606a ]--- RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51 Code: 0f 84 af d4 08 05 48 b8 22 01 00 00 00 00 ad de 49 39 c4 0f 84 b0 d4 08 05 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 67 d4 08 05 49 8d 7d RSP: 0018:ffffc90002bafb28 EFLAGS: 00010a06 RAX: dffffc0000000000 RBX: ffff8880283424b8 RCX: 0000000000000000 RDX: 1777600000001777 RSI: ffffffff87ebecff RDI: ffff8880283424c0 RBP: ffff8880283424b8 R08: ffffffff8a7af760 R09: ffffffff87f99626 R10: 0000000000000004 R11: 0000000000000005 R12: bbbb00000000bbbb R13: bb00000000000000 R14: ffff888028341020 R15: 0000000000000005 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f53667bf000 CR3: 000000002623d000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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.
