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CVE-2024-36478

Status Candidate

Overview

In the Linux kernel, the following vulnerability has been resolved: null_blk: fix null-ptr-dereference while configuring 'power' and 'submit_queues' Writing 'power' and 'submit_queues' concurrently will trigger kernel panic: Test script: modprobe null_blk nr_devices=0 mkdir -p /sys/kernel/config/nullb/nullb0 while true; do echo 1 > submit_queues; echo 4 > submit_queues; done & while true; do echo 1 > power; echo 0 > power; done Test result: BUG: kernel NULL pointer dereference, address: 0000000000000148 Oops: 0000 [#1] PREEMPT SMP RIP: 0010:__lock_acquire+0x41d/0x28f0 Call Trace: <TASK> lock_acquire+0x121/0x450 down_write+0x5f/0x1d0 simple_recursive_removal+0x12f/0x5c0 blk_mq_debugfs_unregister_hctxs+0x7c/0x100 blk_mq_update_nr_hw_queues+0x4a3/0x720 nullb_update_nr_hw_queues+0x71/0xf0 [null_blk] nullb_device_submit_queues_store+0x79/0xf0 [null_blk] configfs_write_iter+0x119/0x1e0 vfs_write+0x326/0x730 ksys_write+0x74/0x150 This is because del_gendisk() can concurrent with blk_mq_update_nr_hw_queues(): nullb_device_power_store nullb_apply_submit_queues null_del_dev del_gendisk nullb_update_nr_hw_queues if (!dev->nullb) // still set while gendisk is deleted return 0 blk_mq_update_nr_hw_queues dev->nullb = NULL Fix this problem by resuing the global mutex to protect nullb_device_power_store() and nullb_update_nr_hw_queues() from configfs.

Related Files

Ubuntu Security Notice USN-7005-1
Posted Sep 12, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 7005-1 - Chenyuan Yang discovered that the CEC driver driver in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the JFS file system contained an out-of-bounds read vulnerability when printing xattr debug information. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-48772, CVE-2023-52884, CVE-2024-23848, CVE-2024-32936, CVE-2024-33619, CVE-2024-33621, CVE-2024-33847, CVE-2024-34027, CVE-2024-34030, CVE-2024-34777, CVE-2024-36015, CVE-2024-36270, CVE-2024-36286, CVE-2024-36478
SHA-256 | 16a95e0e8f80dad3e90b963e7b53b6853ba6f934f88bd2470c901fc0b1d3144e
Ubuntu Security Notice USN-7004-1
Posted Sep 12, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 7004-1 - Chenyuan Yang discovered that the CEC driver driver in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the JFS file system contained an out-of-bounds read vulnerability when printing xattr debug information. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-48772, CVE-2024-23848, CVE-2024-32936, CVE-2024-33619, CVE-2024-33621, CVE-2024-34027, CVE-2024-36015, CVE-2024-36244, CVE-2024-36286, CVE-2024-36288, CVE-2024-36478, CVE-2024-36479, CVE-2024-36484, CVE-2024-36489
SHA-256 | 431af02c0d9e5c558fd6375749c474c2ba15897d474ed112193b050613cb07f8
Ubuntu Security Notice USN-6999-1
Posted Sep 12, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6999-1 - Chenyuan Yang discovered that the CEC driver driver in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the JFS file system contained an out-of-bounds read vulnerability when printing xattr debug information. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-48772, CVE-2024-23848, CVE-2024-32936, CVE-2024-34027, CVE-2024-35247, CVE-2024-36015, CVE-2024-36244, CVE-2024-36270, CVE-2024-36286, CVE-2024-36288, CVE-2024-36477, CVE-2024-36478, CVE-2024-36479, CVE-2024-36484
SHA-256 | f2f3af31e74d781983843453894ecb4650b3d835bf822cc772b1ad0341cc9292
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