{ "cveId": "CVE-2022-50752", "url": "https://patchblox.com/security/cve/CVE-2022-50752", "summary": "CVE-2022-50752 is fixed in 47 products on 1 platform, first by RHSA-2023:2458, released May 9, 2023. It is not reported as exploited. Patch Radar priority: High.", "title": "linux: In the Linux kernel, the following vulnerability has been resolved: md/raid5: Remove unnecessary bio_put() in raid5_...", "description": "In the Linux kernel, the following vulnerability has been resolved: md/raid5: Remove unnecessary bio_put() in raid5_read_one_chunk() When running chunk-sized reads on disks with badblocks duplicate bio free/puts are observed: ============================================================================= BUG bio-200 (Not tainted): Object already free ----------------------------------------------------------------------------- Allocated in mempool_alloc_slab\u002B0x17/0x20 age=3 cpu=2 pid=7504 __slab_alloc.constprop.0\u002B0x5a/0xb0 kmem_cache_alloc\u002B0x31e/0x330 mempool_alloc_slab\u002B0x17/0x20 mempool_alloc\u002B0x100/0x2b0 bio_alloc_bioset\u002B0x181/0x460 do_mpage_readpage\u002B0x776/0xd00 mpage_readahead\u002B0x166/0x320 blkdev_readahead\u002B0x15/0x20 read_pages\u002B0x13f/0x5f0 page_cache_ra_unbounded\u002B0x18d/0x220 force_page_cache_ra\u002B0x181/0x1c0 page_cache_sync_ra\u002B0x65/0xb0 filemap_get_pages\u002B0x1df/0xaf0 filemap_read\u002B0x1e1/0x700 blkdev_read_iter\u002B0x1e5/0x330 vfs_read\u002B0x42a/0x570 Freed in mempool_free_slab\u002B0x17/0x20 age=3 cpu=2 pid=7504 kmem_cache_free\u002B0x46d/0x490 mempool_free_slab\u002B0x17/0x20 mempool_free\u002B0x66/0x190 bio_free\u002B0x78/0x90 bio_put\u002B0x100/0x1a0 raid5_make_request\u002B0x2259/0x2450 md_handle_request\u002B0x402/0x600 md_submit_bio\u002B0xd9/0x120 __submit_bio\u002B0x11f/0x1b0 submit_bio_noacct_nocheck\u002B0x204/0x480 submit_bio_noacct\u002B0x32e/0xc70 submit_bio\u002B0x98/0x1a0 mpage_readahead\u002B0x250/0x320 blkdev_readahead\u002B0x15/0x20 read_pages\u002B0x13f/0x5f0 page_cache_ra_unbounded\u002B0x18d/0x220 Slab 0xffffea000481b600 objects=21 used=0 fp=0xffff8881206d8940 flags=0x17ffffc0010201(locked|slab|head|node=0|zone=2|lastcpupid=0x1fffff) CPU: 0 PID: 34525 Comm: kworker/u24:2 Not tainted 6.0.0-rc2-localyes-265166-gf11c5343fa3f #143 Hardware name: QEMU Standard PC (Q35 \u002B ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Workqueue: raid5wq raid5_do_work Call Trace: \u003CTASK\u003E dump_stack_lvl\u002B0x5a/0x78 dump_stack\u002B0x10/0x16 print_trailer\u002B0x158/0x165 object_err\u002B0x35/0x50 free_debug_processing.cold\u002B0xb7/0xbe __slab_free\u002B0x1ae/0x330 kmem_cache_free\u002B0x46d/0x490 mempool_free_slab\u002B0x17/0x20 mempool_free\u002B0x66/0x190 bio_free\u002B0x78/0x90 bio_put\u002B0x100/0x1a0 mpage_end_io\u002B0x36/0x150 bio_endio\u002B0x2fd/0x360 md_end_io_acct\u002B0x7e/0x90 bio_endio\u002B0x2fd/0x360 handle_failed_stripe\u002B0x960/0xb80 handle_stripe\u002B0x1348/0x3760 handle_active_stripes.constprop.0\u002B0x72a/0xaf0 raid5_do_work\u002B0x177/0x330 process_one_work\u002B0x616/0xb20 worker_thread\u002B0x2bd/0x6f0 kthread\u002B0x179/0x1b0 ret_from_fork\u002B0x22/0x30 \u003C/TASK\u003E The double free is caused by an unnecessary bio_put() in the if(is_badblock(...)) error path in raid5_read_one_chunk(). The error path was moved ahead of bio_alloc_clone() in c82aa1b76787c (\u0022md/raid5: move checking badblock before clone bio in raid5_read_one_chunk\u0022). The previous code checked and freed align_bio which required a bio_put. After the move that is no longer needed as raid_bio is returned to the control of the common io path which performs its own endio resulting in a double free on bad device blocks.", "published": "2023-05-09T00:00:00Z", "severity": "high", "cvss": 7.8, "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "epss": 0.00196, "epssPercentile": 0.09338, "priority": "High", "priorityTier": 3, "exploited": false, "vendorExploited": false, "disclosed": false, "fixes": [ { "platform": "linux", "product": "bpftool", "release": "RHEL 8", "fixedVersion": "0:4.18.0-477.10.1.el8_8", "fix": "RHSA-2023:2951", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2951", "released": "2023-05-16T00:00:00Z" }, { "platform": "linux", "product": "bpftool", "release": "RHEL 9", "fixedVersion": "0:7.0.0-284.11.1.el9_2", "fix": "RHSA-2023:2458", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2458", "released": "2023-05-09T00:00:00Z" }, { "platform": "linux", "product": "kernel", "release": "RHEL 8", "fixedVersion": "0:4.18.0-477.10.1.el8_8", "fix": "RHSA-2023:2951", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2951", "released": "2023-05-16T00:00:00Z" }, { "platform": "linux", "product": "kernel", "release": "RHEL 9", "fixedVersion": "0:5.14.0-284.11.1.el9_2", "fix": "RHSA-2023:2458", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2458", "released": "2023-05-09T00:00:00Z" }, { "platform": "linux", "product": "kernel-64k", "release": "RHEL 9", "fixedVersion": "0:5.14.0-284.11.1.el9_2", "fix": "RHSA-2023:2458", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2458", "released": "2023-05-09T00:00:00Z" }, { "platform": "linux", "product": "kernel-64k-core", "release": "RHEL 9", "fixedVersion": "0:5.14.0-284.11.1.el9_2", "fix": "RHSA-2023:2458", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2458", "released": "2023-05-09T00:00:00Z" }, { "platform": "linux", "product": "kernel-64k-debug", "release": "RHEL 9", "fixedVersion": "0:5.14.0-284.11.1.el9_2", "fix": "RHSA-2023:2458", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2458", "released": "2023-05-09T00:00:00Z" }, { "platform": "linux", "product": "kernel-64k-debug-core", "release": "RHEL 9", "fixedVersion": "0:5.14.0-284.11.1.el9_2", "fix": "RHSA-2023:2458", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2458", "released": "2023-05-09T00:00:00Z" }, { "platform": "linux", "product": "kernel-64k-debug-devel", "release": "RHEL 9", "fixedVersion": "0:5.14.0-284.11.1.el9_2", "fix": "RHSA-2023:2458", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2458", "released": "2023-05-09T00:00:00Z" }, { "platform": "linux", "product": "kernel-64k-debug-devel-matched", "release": "RHEL 9", "fixedVersion": "0:5.14.0-284.11.1.el9_2", "fix": "RHSA-2023:2458", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2458", "released": "2023-05-09T00:00:00Z" }, { "platform": "linux", "product": "kernel-64k-debug-modules", 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"kernel-modules-core", "release": "RHEL 9", "fixedVersion": "0:5.14.0-284.11.1.el9_2", "fix": "RHSA-2023:2458", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2458", "released": "2023-05-09T00:00:00Z" }, { "platform": "linux", "product": "kernel-modules-extra", "release": "RHEL 8", "fixedVersion": "0:4.18.0-477.10.1.el8_8", "fix": "RHSA-2023:2951", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2951", "released": "2023-05-16T00:00:00Z" }, { "platform": "linux", "product": "kernel-modules-extra", "release": "RHEL 9", "fixedVersion": "0:5.14.0-284.11.1.el9_2", "fix": "RHSA-2023:2458", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2458", "released": "2023-05-09T00:00:00Z" }, { "platform": "linux", "product": "kernel-tools", "release": "RHEL 8", "fixedVersion": "0:4.18.0-477.10.1.el8_8", "fix": "RHSA-2023:2951", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2951", "released": "2023-05-16T00:00:00Z" }, { "platform": "linux", "product": "kernel-tools", "release": "RHEL 9", "fixedVersion": "0:5.14.0-284.11.1.el9_2", "fix": "RHSA-2023:2458", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2458", "released": "2023-05-09T00:00:00Z" }, { "platform": "linux", "product": "kernel-tools-libs", "release": "RHEL 8", "fixedVersion": "0:4.18.0-477.10.1.el8_8", "fix": "RHSA-2023:2951", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2951", "released": "2023-05-16T00:00:00Z" }, { "platform": "linux", "product": "kernel-tools-libs", "release": "RHEL 9", "fixedVersion": "0:5.14.0-284.11.1.el9_2", "fix": "RHSA-2023:2458", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2458", "released": "2023-05-09T00:00:00Z" }, { "platform": "linux", "product": "kernel-tools-libs-devel", "release": "RHEL 8", "fixedVersion": "0:4.18.0-477.10.1.el8_8", "fix": "RHSA-2023:2951", "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2951", "released": "2023-05-16T00:00:00Z" }, { "platform": "linux", "product": 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