Updated:
Description:
In the Linux kernel, the following vulnerability has been resolved: crypto: pcrypt - Fix hungtask for PADATA_RESET We found a hungtask bug in test_aead_vec_cfg as follows: INFO: task cryptomgr_test:391009 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Call trace: __switch_to+0x98/0xe0 __schedule+0x6c4/0xf40 schedule+0xd8/0x1b4 schedule_timeout+0x474/0x560 wait_for_common+0x368/0x4e0 wait_for_completion+0x20/0x30 wait_for_completion+0x20/0x30 test_aead_vec_cfg+0xab4/0xd50 test_aead+0x144/0x1f0 alg_test_aead+0xd8/0x1e0 alg_test+0x634/0x890 cryptomgr_test+0x40/0x70 kthread+0x1e0/0x220 ret_from_fork+0x10/0x18 Kernel panic - not syncing: hung_task: blocked tasks For padata_do_parallel, when the return err is 0 or -EBUSY, it will call wait_for_completion(&wait->completion) in test_aead_vec_cfg. In normal case, aead_request_complete() will be called in pcrypt_aead_serial and the return err is 0 for padata_do_parallel. But, when pinst->flags is PADATA_RESET, the return err is -EBUSY for padata_do_parallel, and it won't call aead_request_complete(). Therefore, test_aead_vec_cfg will hung at wait_for_completion(&wait->completion), which will cause hungtask. The problem comes as following: (padata_do_parallel) | rcu_read_lock_bh(); | err = -EINVAL; | (padata_replace) | pinst->flags |= PADATA_RESET; err = -EBUSY | if (pinst->flags & PADATA_RESET) | rcu_read_unlock_bh() | return err In order to resolve the problem, we replace the return err -EBUSY with -EAGAIN, which means parallel_data is changing, and the caller should call it again. v3: remove retry and just change the return err. v2: introduce padata_try_do_parallel() in pcrypt_aead_encrypt and pcrypt_aead_decrypt to solve the hungtask.
CVSS3: 5.5
| OS | Vendor version | Errata |
|---|---|---|
| Oracle Linux 6 UEK 4 | 4.1.12-124.88.3.el6uek | ELSA-2024-12570 |
| Oracle Linux 7 UEK 4 | 4.1.12-124.88.3.el7uek | ELSA-2024-12571 |
| RHEL 8 | 4.18.0-553.8.1.el8_10 | RHSA-2024:4211 |
| Oracle Linux 8 | 4.18.0-553.8.1.el8_10 | ELSA-2024-4211 |
| AlmaLinux 8 | 4.18.0-553.8.1.el8_10 | ALSA-2024:4211 |
| Rocky Linux 8 | 4.18.0-553.8.1.el8_10 | RLSA-2024:4211 |
| RHEL 9 | 5.14.0-503.11.1.el9_5 | RHSA-2024:9315 |
| Oracle Linux 9 | 5.14.0-503.11.1.el9_5 | ELSA-2024-9315 |
| Rocky Linux 9 | 5.14.0-503.11.1.el9_5 | RLSA-2024:9315 |
| Amazon Linux 2 5.4 | 5.4.265-176.364.amzn2 | ALASKERNEL-5.4-2024-057 |
| Amazon Linux 2 5.10 | 5.10.205-195.804.amzn2 | ALASKERNEL-5.10-2024-045 |
| OS | Original kernel version | State |
|---|---|---|
| Oracle Linux 6 UEK 4 | |
Planned |
| Oracle Linux 7 UEK 4 | |
Planned |
| RHEL 8 |
4.18.0-147.el8
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| Oracle Linux 8 |
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| CloudLinux OS 8 |
4.18.0-147.3.1.el8.lve.1
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| CloudLinux OS 7h |
4.18.0-553.5.1.lve.1.el7h
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4.18.0-305.3.1.el8_4
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Released |
| RHEL 9 |
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Released |
| Oracle Linux 9 |
5.14.0-70.13.1.0.3.el9_0
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5.14.0-427.13.1.el9_4
5.14.0-427.16.1.el9_4
5.14.0-362.24.1.0.2.el9_3
5.14.0-427.18.1.el9_4
5.14.0-427.20.1.el9_4
5.14.0-427.22.1.el9_4
5.14.0-427.24.1.el9_4
5.14.0-427.26.1.el9_4
5.14.0-427.28.1.el9_4
5.14.0-427.31.1.el9_4
5.14.0-427.33.1.el9_4
5.14.0-427.35.1.el9_4
5.14.0-427.37.1.el9_4
5.14.0-427.40.1.el9_4
5.14.0-427.42.1.el9_4
|
Released |
| Rocky Linux 9 |
5.14.0-162.6.1.el9_1
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hide all
5.14.0-70.26.1.el9_0
5.14.0-70.30.1.el9_0
5.14.0-70.22.1.el9_0
5.14.0-162.6.1.el9_1.0.1
5.14.0-162.18.1.el9_1
5.14.0-162.12.1.el9_1.0.1
5.14.0-162.12.1.el9_1.0.2
5.14.0-162.22.2.el9_1
5.14.0-162.23.1.el9_1
5.14.0-284.30.1.el9_2
5.14.0-362.8.1.el9_3
5.14.0-362.13.1.el9_3
5.14.0-362.18.1.el9_3
5.14.0-362.24.1.el9_3
5.14.0-362.18.1.el9_3.0.1
5.14.0-427.16.1.el9_4
5.14.0-362.24.1.el9_3.0.1
5.14.0-427.18.1.el9_4
5.14.0-427.20.1.el9_4
5.14.0-427.24.1.el9_4
5.14.0-427.26.1.el9_4
5.14.0-427.28.1.el9_4
5.14.0-427.20.1.el9_4.0.1
5.14.0-427.22.1.el9_4
5.14.0-427.31.1.el9_4
5.14.0-427.33.1.el9_4
5.14.0-427.35.1.el9_4
5.14.0-427.37.1.el9_4
5.14.0-427.40.1.el9_4
5.14.0-427.42.1.el9_4
|
Released |
| Amazon Linux 2 5.4 |
5.4.196-108.356.amzn2
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5.4.188-104.359.amzn2
5.4.186-102.354.amzn2
5.4.181-99.354.amzn2
5.4.176-91.338.amzn2
5.4.172-90.336.amzn2
5.4.156-83.273.amzn2
5.4.162-86.275.amzn2
5.4.105-48.177.amzn2
5.4.117-58.216.amzn2
5.4.110-54.182.amzn2
5.4.209-116.367.amzn2
5.4.149-73.259.amzn2
5.4.190-107.353.amzn2
5.4.110-54.189.amzn2
5.4.217-126.408.amzn2
5.4.219-126.411.amzn2
5.4.226-129.415.amzn2
5.4.228-131.415.amzn2
5.4.231-137.341.amzn2
5.4.235-144.344.amzn2
5.4.257-170.359.amzn2
5.4.253-167.359.amzn2
5.4.250-166.369.amzn2
5.4.249-163.359.amzn2
5.4.247-161.349.amzn2
5.4.241-150.347.amzn2
5.4.242-156.349.amzn2
5.4.242-155.348.amzn2
5.4.254-169.358.amzn2
5.4.247-162.350.amzn2
5.4.258-171.360.amzn2
5.4.259-173.361.amzn2
5.4.228-132.418.amzn2
5.4.238-148.347.amzn2
5.4.242-159.350.amzn2
5.4.254-170.358.amzn2
5.4.261-174.360.amzn2
|
Released |
| Amazon Linux 2 5.10 | |
Planned |