| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2022-49111: Bluetooth: Fix use after free in hci_send_acl |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| Bluetooth: Fix use after free in hci_send_acl |
| |
| This fixes the following trace caused by receiving |
| HCI_EV_DISCONN_PHY_LINK_COMPLETE which does call hci_conn_del without |
| first checking if conn->type is in fact AMP_LINK and in case it is |
| do properly cleanup upper layers with hci_disconn_cfm: |
| |
| ================================================================== |
| BUG: KASAN: use-after-free in hci_send_acl+0xaba/0xc50 |
| Read of size 8 at addr ffff88800e404818 by task bluetoothd/142 |
| |
| CPU: 0 PID: 142 Comm: bluetoothd Not tainted |
| 5.17.0-rc5-00006-gda4022eeac1a #7 |
| Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS |
| rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 |
| Call Trace: |
| <TASK> |
| dump_stack_lvl+0x45/0x59 |
| print_address_description.constprop.0+0x1f/0x150 |
| kasan_report.cold+0x7f/0x11b |
| hci_send_acl+0xaba/0xc50 |
| l2cap_do_send+0x23f/0x3d0 |
| l2cap_chan_send+0xc06/0x2cc0 |
| l2cap_sock_sendmsg+0x201/0x2b0 |
| sock_sendmsg+0xdc/0x110 |
| sock_write_iter+0x20f/0x370 |
| do_iter_readv_writev+0x343/0x690 |
| do_iter_write+0x132/0x640 |
| vfs_writev+0x198/0x570 |
| do_writev+0x202/0x280 |
| do_syscall_64+0x38/0x90 |
| entry_SYSCALL_64_after_hwframe+0x44/0xae |
| RSP: 002b:00007ffce8a099b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 |
| Code: 0f 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 |
| 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 14 00 00 00 0f 05 |
| <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 |
| RDX: 0000000000000001 RSI: 00007ffce8a099e0 RDI: 0000000000000015 |
| RAX: ffffffffffffffda RBX: 00007ffce8a099e0 RCX: 00007f788fc3cf77 |
| R10: 00007ffce8af7080 R11: 0000000000000246 R12: 000055e4ccf75580 |
| RBP: 0000000000000015 R08: 0000000000000002 R09: 0000000000000001 |
| </TASK> |
| R13: 000055e4ccf754a0 R14: 000055e4ccf75cd0 R15: 000055e4ccf4a6b0 |
| |
| Allocated by task 45: |
| kasan_save_stack+0x1e/0x40 |
| __kasan_kmalloc+0x81/0xa0 |
| hci_chan_create+0x9a/0x2f0 |
| l2cap_conn_add.part.0+0x1a/0xdc0 |
| l2cap_connect_cfm+0x236/0x1000 |
| le_conn_complete_evt+0x15a7/0x1db0 |
| hci_le_conn_complete_evt+0x226/0x2c0 |
| hci_le_meta_evt+0x247/0x450 |
| hci_event_packet+0x61b/0xe90 |
| hci_rx_work+0x4d5/0xc50 |
| process_one_work+0x8fb/0x15a0 |
| worker_thread+0x576/0x1240 |
| kthread+0x29d/0x340 |
| ret_from_fork+0x1f/0x30 |
| |
| Freed by task 45: |
| kasan_save_stack+0x1e/0x40 |
| kasan_set_track+0x21/0x30 |
| kasan_set_free_info+0x20/0x30 |
| __kasan_slab_free+0xfb/0x130 |
| kfree+0xac/0x350 |
| hci_conn_cleanup+0x101/0x6a0 |
| hci_conn_del+0x27e/0x6c0 |
| hci_disconn_phylink_complete_evt+0xe0/0x120 |
| hci_event_packet+0x812/0xe90 |
| hci_rx_work+0x4d5/0xc50 |
| process_one_work+0x8fb/0x15a0 |
| worker_thread+0x576/0x1240 |
| kthread+0x29d/0x340 |
| ret_from_fork+0x1f/0x30 |
| |
| The buggy address belongs to the object at ffff88800c0f0500 |
| The buggy address is located 24 bytes inside of |
| which belongs to the cache kmalloc-128 of size 128 |
| The buggy address belongs to the page: |
| 128-byte region [ffff88800c0f0500, ffff88800c0f0580) |
| flags: 0x100000000000200(slab|node=0|zone=1) |
| page:00000000fe45cd86 refcount:1 mapcount:0 |
| mapping:0000000000000000 index:0x0 pfn:0xc0f0 |
| raw: 0000000000000000 0000000080100010 00000001ffffffff |
| 0000000000000000 |
| raw: 0100000000000200 ffffea00003a2c80 dead000000000004 |
| ffff8880078418c0 |
| page dumped because: kasan: bad access detected |
| ffff88800c0f0400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc |
| Memory state around the buggy address: |
| >ffff88800c0f0500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb |
| ffff88800c0f0480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc |
| ffff88800c0f0580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc |
| ^ |
| ================================================================== |
| ffff88800c0f0600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb |
| |
| The Linux kernel CVE team has assigned CVE-2022-49111 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.9.311 with commit c41de54b0a963e59e4dd04c029a4a6d73f45ef9c |
| Fixed in 4.14.276 with commit 643a6c26bd32e339d00ad97b8822b6db009e803c |
| Fixed in 4.19.238 with commit 684e505406abaeabe0058e9776f9210bf2747953 |
| Fixed in 5.4.189 with commit 3803d896ddd97c7c16689a5381c0960040727647 |
| Fixed in 5.10.111 with commit 2cc803804ec9a296b3156855d6c8c4ca1c6b84be |
| Fixed in 5.15.34 with commit d404765dffdbd8dcd14758695d0c96c52fb2e624 |
| Fixed in 5.16.20 with commit 4da302b90b96c309987eb9b37c8547f939f042d2 |
| Fixed in 5.17.3 with commit b3c2ea1fd444b3bb7b82bfd2c3a45418f85c2502 |
| Fixed in 5.18 with commit f63d24baff787e13b723d86fe036f84bdbc35045 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2022-49111 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/bluetooth/hci_event.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/c41de54b0a963e59e4dd04c029a4a6d73f45ef9c |
| https://git.kernel.org/stable/c/643a6c26bd32e339d00ad97b8822b6db009e803c |
| https://git.kernel.org/stable/c/684e505406abaeabe0058e9776f9210bf2747953 |
| https://git.kernel.org/stable/c/3803d896ddd97c7c16689a5381c0960040727647 |
| https://git.kernel.org/stable/c/2cc803804ec9a296b3156855d6c8c4ca1c6b84be |
| https://git.kernel.org/stable/c/d404765dffdbd8dcd14758695d0c96c52fb2e624 |
| https://git.kernel.org/stable/c/4da302b90b96c309987eb9b37c8547f939f042d2 |
| https://git.kernel.org/stable/c/b3c2ea1fd444b3bb7b82bfd2c3a45418f85c2502 |
| https://git.kernel.org/stable/c/f63d24baff787e13b723d86fe036f84bdbc35045 |
