| 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-2022-48728: IB/hfi1: Fix AIP early init panic |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| IB/hfi1: Fix AIP early init panic |
| |
| An early failure in hfi1_ipoib_setup_rn() can lead to the following panic: |
| |
| BUG: unable to handle kernel NULL pointer dereference at 00000000000001b0 |
| PGD 0 P4D 0 |
| Oops: 0002 [#1] SMP NOPTI |
| Workqueue: events work_for_cpu_fn |
| RIP: 0010:try_to_grab_pending+0x2b/0x140 |
| Code: 1f 44 00 00 41 55 41 54 55 48 89 d5 53 48 89 fb 9c 58 0f 1f 44 00 00 48 89 c2 fa 66 0f 1f 44 00 00 48 89 55 00 40 84 f6 75 77 <f0> 48 0f ba 2b 00 72 09 31 c0 5b 5d 41 5c 41 5d c3 48 89 df e8 6c |
| RSP: 0018:ffffb6b3cf7cfa48 EFLAGS: 00010046 |
| RAX: 0000000000000246 RBX: 00000000000001b0 RCX: 0000000000000000 |
| RDX: 0000000000000246 RSI: 0000000000000000 RDI: 00000000000001b0 |
| RBP: ffffb6b3cf7cfa70 R08: 0000000000000f09 R09: 0000000000000001 |
| R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 |
| R13: ffffb6b3cf7cfa90 R14: ffffffff9b2fbfc0 R15: ffff8a4fdf244690 |
| FS: 0000000000000000(0000) GS:ffff8a527f400000(0000) knlGS:0000000000000000 |
| CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 |
| CR2: 00000000000001b0 CR3: 00000017e2410003 CR4: 00000000007706f0 |
| DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 |
| DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 |
| PKRU: 55555554 |
| Call Trace: |
| __cancel_work_timer+0x42/0x190 |
| ? dev_printk_emit+0x4e/0x70 |
| iowait_cancel_work+0x15/0x30 [hfi1] |
| hfi1_ipoib_txreq_deinit+0x5a/0x220 [hfi1] |
| ? dev_err+0x6c/0x90 |
| hfi1_ipoib_netdev_dtor+0x15/0x30 [hfi1] |
| hfi1_ipoib_setup_rn+0x10e/0x150 [hfi1] |
| rdma_init_netdev+0x5a/0x80 [ib_core] |
| ? hfi1_ipoib_free_rdma_netdev+0x20/0x20 [hfi1] |
| ipoib_intf_init+0x6c/0x350 [ib_ipoib] |
| ipoib_intf_alloc+0x5c/0xc0 [ib_ipoib] |
| ipoib_add_one+0xbe/0x300 [ib_ipoib] |
| add_client_context+0x12c/0x1a0 [ib_core] |
| enable_device_and_get+0xdc/0x1d0 [ib_core] |
| ib_register_device+0x572/0x6b0 [ib_core] |
| rvt_register_device+0x11b/0x220 [rdmavt] |
| hfi1_register_ib_device+0x6b4/0x770 [hfi1] |
| do_init_one.isra.20+0x3e3/0x680 [hfi1] |
| local_pci_probe+0x41/0x90 |
| work_for_cpu_fn+0x16/0x20 |
| process_one_work+0x1a7/0x360 |
| ? create_worker+0x1a0/0x1a0 |
| worker_thread+0x1cf/0x390 |
| ? create_worker+0x1a0/0x1a0 |
| kthread+0x116/0x130 |
| ? kthread_flush_work_fn+0x10/0x10 |
| ret_from_fork+0x1f/0x40 |
| |
| The panic happens in hfi1_ipoib_txreq_deinit() because there is a NULL |
| deref when hfi1_ipoib_netdev_dtor() is called in this error case. |
| |
| hfi1_ipoib_txreq_init() and hfi1_ipoib_rxq_init() are self unwinding so |
| fix by adjusting the error paths accordingly. |
| |
| Other changes: |
| - hfi1_ipoib_free_rdma_netdev() is deleted including the free_netdev() |
| since the netdev core code deletes calls free_netdev() |
| - The switch to the accelerated entrances is moved to the success path. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48728 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.8 with commit d99dc602e2a55a99940ba9506a7126dfa54d54ea and fixed in 5.10.99 with commit 4a9bd1e6780fc59f81466ec3489d5ad535a37190 |
| Issue introduced in 5.8 with commit d99dc602e2a55a99940ba9506a7126dfa54d54ea and fixed in 5.15.22 with commit a3dd4d2682f2a796121609e5f3bbeb1243198c53 |
| Issue introduced in 5.8 with commit d99dc602e2a55a99940ba9506a7126dfa54d54ea and fixed in 5.16.8 with commit 1899c3cad265c4583658aed5293d02e8af84276b |
| Issue introduced in 5.8 with commit d99dc602e2a55a99940ba9506a7126dfa54d54ea and fixed in 5.17 with commit 5f8f55b92edd621f056bdf09e572092849fabd83 |
| |
| 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-2022-48728 |
| 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: |
| drivers/infiniband/hw/hfi1/ipoib_main.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/4a9bd1e6780fc59f81466ec3489d5ad535a37190 |
| https://git.kernel.org/stable/c/a3dd4d2682f2a796121609e5f3bbeb1243198c53 |
| https://git.kernel.org/stable/c/1899c3cad265c4583658aed5293d02e8af84276b |
| https://git.kernel.org/stable/c/5f8f55b92edd621f056bdf09e572092849fabd83 |
