Dear syzbot, Please explain why you are spamming me with all these reports - four so far. I don't understand why you think I should be doing anything with these. Thanks. On Mon, Aug 03, 2020 at 08:05:21AM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 5a30a789 Merge tag 'x86-urgent-2020-08-02' of git://git.ke.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=11cd21cc900000 > kernel config: https://syzkaller.appspot.com/x/.config?x=c0cfcf935bcc94d2 > dashboard link: https://syzkaller.appspot.com/bug?extid=24ebd650e20bd263ca01 > compiler: gcc (GCC) 10.1.0-syz 20200507 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10fd4504900000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14aa36a4900000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+24ebd650e20bd263ca01@xxxxxxxxxxxxxxxxxxxxxxxxx > > Bluetooth: hci0: unknown advertising packet type: 0x2b > ================================================================== > BUG: KASAN: slab-out-of-bounds in hci_le_direct_adv_report_evt net/bluetooth/hci_event.c:5850 [inline] > BUG: KASAN: slab-out-of-bounds in hci_le_meta_evt+0x380c/0x3eb0 net/bluetooth/hci_event.c:5914 > Read of size 1 at addr ffff8880a727de0c by task kworker/u5:0/1535 > > CPU: 1 PID: 1535 Comm: kworker/u5:0 Not tainted 5.8.0-rc7-syzkaller #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > Workqueue: hci0 hci_rx_work > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x18f/0x20d lib/dump_stack.c:118 > print_address_description.constprop.0.cold+0xae/0x436 mm/kasan/report.c:383 > __kasan_report mm/kasan/report.c:513 [inline] > kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 > hci_le_direct_adv_report_evt net/bluetooth/hci_event.c:5850 [inline] > hci_le_meta_evt+0x380c/0x3eb0 net/bluetooth/hci_event.c:5914 > hci_event_packet+0x245a/0x86f5 net/bluetooth/hci_event.c:6167 > hci_rx_work+0x22e/0xb10 net/bluetooth/hci_core.c:4705 > process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 > worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 > kthread+0x3b5/0x4a0 kernel/kthread.c:291 > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 > > Allocated by task 6834: > save_stack+0x1b/0x40 mm/kasan/common.c:48 > set_track mm/kasan/common.c:56 [inline] > __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494 > __kmalloc_reserve net/core/skbuff.c:142 [inline] > __alloc_skb+0xae/0x550 net/core/skbuff.c:210 > alloc_skb include/linux/skbuff.h:1083 [inline] > bt_skb_alloc include/net/bluetooth/bluetooth.h:377 [inline] > vhci_get_user drivers/bluetooth/hci_vhci.c:165 [inline] > vhci_write+0xbd/0x450 drivers/bluetooth/hci_vhci.c:285 > call_write_iter include/linux/fs.h:1908 [inline] > new_sync_write+0x422/0x650 fs/read_write.c:503 > vfs_write+0x59d/0x6b0 fs/read_write.c:578 > ksys_write+0x12d/0x250 fs/read_write.c:631 > do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 > entry_SYSCALL_64_after_hwframe+0x44/0xa9 > > Freed by task 6627: > save_stack+0x1b/0x40 mm/kasan/common.c:48 > set_track mm/kasan/common.c:56 [inline] > kasan_set_free_info mm/kasan/common.c:316 [inline] > __kasan_slab_free+0xf5/0x140 mm/kasan/common.c:455 > __cache_free mm/slab.c:3426 [inline] > kfree+0x103/0x2c0 mm/slab.c:3757 > tomoyo_find_next_domain+0x81d/0x1f77 security/tomoyo/domain.c:885 > tomoyo_bprm_check_security security/tomoyo/tomoyo.c:101 [inline] > tomoyo_bprm_check_security+0x121/0x1a0 security/tomoyo/tomoyo.c:91 > security_bprm_check+0x45/0xa0 security/security.c:840 > search_binary_handler fs/exec.c:1737 [inline] > exec_binprm fs/exec.c:1790 [inline] > __do_execve_file+0x1577/0x2ee0 fs/exec.c:1926 > do_execveat_common fs/exec.c:1980 [inline] > do_execve+0x35/0x50 fs/exec.c:1997 > __do_sys_execve fs/exec.c:2073 [inline] > __se_sys_execve fs/exec.c:2068 [inline] > __x64_sys_execve+0x7c/0xa0 fs/exec.c:2068 > do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 > entry_SYSCALL_64_after_hwframe+0x44/0xa9 > > The buggy address belongs to the object at ffff8880a727dc00 > which belongs to the cache kmalloc-512 of size 512 > The buggy address is located 12 bytes to the right of > 512-byte region [ffff8880a727dc00, ffff8880a727de00) > The buggy address belongs to the page: > page:ffffea00029c9f40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 > flags: 0xfffe0000000200(slab) > raw: 00fffe0000000200 ffffea00029e3848 ffffea0002731b88 ffff8880aa000a80 > raw: 0000000000000000 ffff8880a727d000 0000000100000004 0000000000000000 > page dumped because: kasan: bad access detected > > Memory state around the buggy address: > ffff8880a727dd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ffff8880a727dd80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > >ffff8880a727de00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ^ > ffff8880a727de80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8880a727df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ================================================================== > > > --- > 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 > -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
