| 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-2022-48823: scsi: qedf: Fix refcount issue when LOGO is received during TMF |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| scsi: qedf: Fix refcount issue when LOGO is received during TMF |
| |
| Hung task call trace was seen during LOGO processing. |
| |
| [ 974.309060] [0000:00:00.0]:[qedf_eh_device_reset:868]: 1:0:2:0: LUN RESET Issued... |
| [ 974.309065] [0000:00:00.0]:[qedf_initiate_tmf:2422]: tm_flags 0x10 sc_cmd 00000000c16b930f op = 0x2a target_id = 0x2 lun=0 |
| [ 974.309178] [0000:00:00.0]:[qedf_initiate_tmf:2431]: portid=016900 tm_flags =LUN RESET |
| [ 974.309222] [0000:00:00.0]:[qedf_initiate_tmf:2438]: orig io_req = 00000000ec78df8f xid = 0x180 ref_cnt = 1. |
| [ 974.309625] host1: rport 016900: Received LOGO request while in state Ready |
| [ 974.309627] host1: rport 016900: Delete port |
| [ 974.309642] host1: rport 016900: work event 3 |
| [ 974.309644] host1: rport 016900: lld callback ev 3 |
| [ 974.313243] [0000:61:00.2]:[qedf_execute_tmf:2383]:1: fcport is uploading, not executing flush. |
| [ 974.313295] [0000:61:00.2]:[qedf_execute_tmf:2400]:1: task mgmt command success... |
| [ 984.031088] INFO: task jbd2/dm-15-8:7645 blocked for more than 120 seconds. |
| [ 984.031136] Not tainted 4.18.0-305.el8.x86_64 #1 |
| |
| [ 984.031166] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. |
| [ 984.031209] jbd2/dm-15-8 D 0 7645 2 0x80004080 |
| [ 984.031212] Call Trace: |
| [ 984.031222] __schedule+0x2c4/0x700 |
| [ 984.031230] ? unfreeze_partials.isra.83+0x16e/0x1a0 |
| [ 984.031233] ? bit_wait_timeout+0x90/0x90 |
| [ 984.031235] schedule+0x38/0xa0 |
| [ 984.031238] io_schedule+0x12/0x40 |
| [ 984.031240] bit_wait_io+0xd/0x50 |
| [ 984.031243] __wait_on_bit+0x6c/0x80 |
| [ 984.031248] ? free_buffer_head+0x21/0x50 |
| [ 984.031251] out_of_line_wait_on_bit+0x91/0xb0 |
| [ 984.031257] ? init_wait_var_entry+0x50/0x50 |
| [ 984.031268] jbd2_journal_commit_transaction+0x112e/0x19f0 [jbd2] |
| [ 984.031280] kjournald2+0xbd/0x270 [jbd2] |
| [ 984.031284] ? finish_wait+0x80/0x80 |
| [ 984.031291] ? commit_timeout+0x10/0x10 [jbd2] |
| [ 984.031294] kthread+0x116/0x130 |
| [ 984.031300] ? kthread_flush_work_fn+0x10/0x10 |
| [ 984.031305] ret_from_fork+0x1f/0x40 |
| |
| There was a ref count issue when LOGO is received during TMF. This leads to |
| one of the I/Os hanging with the driver. Fix the ref count. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48823 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.4.180 with commit 7cc32ff0cd6c44a3c26de5faecfe8b5546198fad |
| Fixed in 5.10.101 with commit 87f187e5265bc8e3b38faef8b9db864cdd61dde7 |
| Fixed in 5.15.24 with commit 6be8eaad75ca73131e2a697f0270dc8ee73814a8 |
| Fixed in 5.16.10 with commit 7fcbed38503bb34c6e6538b6a9482d1c6bead1e8 |
| Fixed in 5.17 with commit 5239ab63f17cee643bd4bf6addfedebaa7d4f41e |
| |
| 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-2022-48823 |
| 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/scsi/qedf/qedf_io.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/7cc32ff0cd6c44a3c26de5faecfe8b5546198fad |
| https://git.kernel.org/stable/c/87f187e5265bc8e3b38faef8b9db864cdd61dde7 |
| https://git.kernel.org/stable/c/6be8eaad75ca73131e2a697f0270dc8ee73814a8 |
| https://git.kernel.org/stable/c/7fcbed38503bb34c6e6538b6a9482d1c6bead1e8 |
| https://git.kernel.org/stable/c/5239ab63f17cee643bd4bf6addfedebaa7d4f41e |
