{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"MEDIUM" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: do not clear page dirty inside extent_write_locked_range()\n\n[BUG]\nFor subpage + zoned case, the following workload can lead to rsv data\nleak at unmount time:\n\n # mkfs.btrfs -f -s 4k $dev\n # mount $dev $mnt\n # fsstress -w -n 8 -d $mnt -s 1709539240\n 0/0: fiemap - no filename\n 0/1: copyrange read - no filename\n 0/2: write - no filename\n 0/3: rename - no source filename\n 0/4: creat f0 x:0 0 0\n 0/4: creat add id=0,parent=-1\n 0/5: writev f0[259 1 0 0 0 0] [778052,113,965] 0\n 0/6: ioctl(FIEMAP) f0[259 1 0 0 224 887097] [1294220,2291618343991484791,0x10000] -1\n 0/7: dwrite - xfsctl(XFS_IOC_DIOINFO) f0[259 1 0 0 224 887097] return 25, fallback to stat()\n 0/7: dwrite f0[259 1 0 0 224 887097] [696320,102400] 0\n # umount $mnt\n\nThe dmesg includes the following rsv leak detection warning (all call\ntrace skipped):\n\n ------------[ cut here ]------------\n WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8653 btrfs_destroy_inode+0x1e0/0x200 [btrfs]\n ---[ end trace 0000000000000000 ]---\n ------------[ cut here ]------------\n WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8654 btrfs_destroy_inode+0x1a8/0x200 [btrfs]\n ---[ end trace 0000000000000000 ]---\n ------------[ cut here ]------------\n WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8660 btrfs_destroy_inode+0x1a0/0x200 [btrfs]\n ---[ end trace 0000000000000000 ]---\n BTRFS info (device sda): last unmount of filesystem 1b4abba9-de34-4f07-9e7f-157cf12a18d6\n ------------[ cut here ]------------\n WARNING: CPU: 3 PID: 4528 at fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs]\n ---[ end trace 0000000000000000 ]---\n BTRFS info (device sda): space_info DATA has 268218368 free, is not full\n BTRFS info (device sda): space_info total=268435456, used=204800, pinned=0, reserved=0, may_use=12288, readonly=0 zone_unusable=0\n BTRFS info (device sda): global_block_rsv: size 0 reserved 0\n BTRFS info (device sda): trans_block_rsv: size 0 reserved 0\n BTRFS info (device sda): chunk_block_rsv: size 0 reserved 0\n BTRFS info (device sda): delayed_block_rsv: size 0 reserved 0\n BTRFS info (device sda): delayed_refs_rsv: size 0 reserved 0\n ------------[ cut here ]------------\n WARNING: CPU: 3 PID: 4528 at fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs]\n ---[ end trace 0000000000000000 ]---\n BTRFS info (device sda): space_info METADATA has 267796480 free, is not full\n BTRFS info (device sda): space_info total=268435456, used=131072, pinned=0, reserved=0, may_use=262144, readonly=0 zone_unusable=245760\n BTRFS info (device sda): global_block_rsv: size 0 reserved 0\n BTRFS info (device sda): trans_block_rsv: size 0 reserved 0\n BTRFS info (device sda): chunk_block_rsv: size 0 reserved 0\n BTRFS info (device sda): delayed_block_rsv: size 0 reserved 0\n BTRFS info (device sda): delayed_refs_rsv: size 0 reserved 0\n\nAbove $dev is a tcmu-runner emulated zoned HDD, which has a max zone\nappend size of 64K, and the system has 64K page size.\n\n[CAUSE]\nI have added several trace_printk() to show the events (header skipped):\n\n > btrfs_dirty_pages: r/i=5/259 dirty start=774144 len=114688\n > btrfs_dirty_pages: r/i=5/259 dirty part of page=720896 off_in_page=53248 len_in_page=12288\n > btrfs_dirty_pages: r/i=5/259 dirty part of page=786432 off_in_page=0 len_in_page=65536\n > btrfs_dirty_pages: r/i=5/259 dirty part of page=851968 off_in_page=0 len_in_page=36864\n\nThe above lines show our buffered write has dirtied 3 pages of inode\n259 of root 5:\n\n 704K 768K 832K 896K\n I |////I/////////////////I///////////| I\n 756K 868K\n\n |///| is the dirtied range using subpage bitmaps. and 'I' is the page\n boundary.\n\n Meanwhile all three pages (704K, 768K, 832K) have their PageDirty\n flag set.\n\n > btrfs_direct_write: r/i=5/259 start dio filepos=696320 len=102400\n\nThen direct IO writ\n---truncated---", "category":"general", "title":"Synopsis" } ], "publisher":{ "issuing_authority":"openEuler security committee", "name":"openEuler", "namespace":"https://www.openeuler.org", "contact_details":"openeuler-security@openeuler.org", "category":"vendor" }, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2024-44972" }, { "summary":"CVE-2024-44972 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2024/csaf-openeuler-cve-2024-44972.json" }, { "summary":"openEuler-SA-2025-1097", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1097" }, { "summary":"CVE-2024-44972", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2024-44972&packageName=kernel" } ], "title":"openEuler cve CVE-2024-44972", "tracking":{ "initial_release_date":"2025-02-08T20:33:46+08:00", "revision_history":[ { "date":"2025-02-08T20:33:46+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2025-02-08T20:33:46+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2025-02-08T20:33:46+08:00", "id":"CVE-2024-44972", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS" }, "product_id":"openEuler-24.03-LTS", "name":"openEuler-24.03-LTS" }, "name":"openEuler-24.03-LTS", "category":"product_version" } ], "category":"product_name" }, { "name":"aarch64", "branches":[ { "product":{ "product_identification_helper":{ 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subpage + zoned case, the following workload can lead to rsv data\nleak at unmount time:\n\n # mkfs.btrfs -f -s 4k $dev\n # mount $dev $mnt\n # fsstress -w -n 8 -d $mnt -s 1709539240\n 0/0: fiemap - no filename\n 0/1: copyrange read - no filename\n 0/2: write - no filename\n 0/3: rename - no source filename\n 0/4: creat f0 x:0 0 0\n 0/4: creat add id=0,parent=-1\n 0/5: writev f0[259 1 0 0 0 0] [778052,113,965] 0\n 0/6: ioctl(FIEMAP) f0[259 1 0 0 224 887097] [1294220,2291618343991484791,0x10000] -1\n 0/7: dwrite - xfsctl(XFS_IOC_DIOINFO) f0[259 1 0 0 224 887097] return 25, fallback to stat()\n 0/7: dwrite f0[259 1 0 0 224 887097] [696320,102400] 0\n # umount $mnt\n\nThe dmesg includes the following rsv leak detection warning (all call\ntrace skipped):\n\n ------------[ cut here ]------------\n WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8653 btrfs_destroy_inode+0x1e0/0x200 [btrfs]\n ---[ end trace 0000000000000000 ]---\n ------------[ cut here ]------------\n WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8654 btrfs_destroy_inode+0x1a8/0x200 [btrfs]\n ---[ end trace 0000000000000000 ]---\n ------------[ cut here ]------------\n WARNING: CPU: 2 PID: 4528 at fs/btrfs/inode.c:8660 btrfs_destroy_inode+0x1a0/0x200 [btrfs]\n ---[ end trace 0000000000000000 ]---\n BTRFS info (device sda): last unmount of filesystem 1b4abba9-de34-4f07-9e7f-157cf12a18d6\n ------------[ cut here ]------------\n WARNING: CPU: 3 PID: 4528 at fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs]\n ---[ end trace 0000000000000000 ]---\n BTRFS info (device sda): space_info DATA has 268218368 free, is not full\n BTRFS info (device sda): space_info total=268435456, used=204800, pinned=0, reserved=0, may_use=12288, readonly=0 zone_unusable=0\n BTRFS info (device sda): global_block_rsv: size 0 reserved 0\n BTRFS info (device sda): trans_block_rsv: size 0 reserved 0\n BTRFS info (device sda): chunk_block_rsv: size 0 reserved 0\n BTRFS info (device sda): delayed_block_rsv: size 0 reserved 0\n BTRFS info (device sda): delayed_refs_rsv: size 0 reserved 0\n ------------[ cut here ]------------\n WARNING: CPU: 3 PID: 4528 at fs/btrfs/block-group.c:4434 btrfs_free_block_groups+0x338/0x500 [btrfs]\n ---[ end trace 0000000000000000 ]---\n BTRFS info (device sda): space_info METADATA has 267796480 free, is not full\n BTRFS info (device sda): space_info total=268435456, used=131072, pinned=0, reserved=0, may_use=262144, readonly=0 zone_unusable=245760\n BTRFS info (device sda): global_block_rsv: size 0 reserved 0\n BTRFS info (device sda): trans_block_rsv: size 0 reserved 0\n BTRFS info (device sda): chunk_block_rsv: size 0 reserved 0\n BTRFS info (device sda): delayed_block_rsv: size 0 reserved 0\n BTRFS info (device sda): delayed_refs_rsv: size 0 reserved 0\n\nAbove $dev is a tcmu-runner emulated zoned HDD, which has a max zone\nappend size of 64K, and the system has 64K page size.\n\n[CAUSE]\nI have added several trace_printk() to show the events (header skipped):\n\n > btrfs_dirty_pages: r/i=5/259 dirty start=774144 len=114688\n > btrfs_dirty_pages: r/i=5/259 dirty part of page=720896 off_in_page=53248 len_in_page=12288\n > btrfs_dirty_pages: r/i=5/259 dirty part of page=786432 off_in_page=0 len_in_page=65536\n > btrfs_dirty_pages: r/i=5/259 dirty part of page=851968 off_in_page=0 len_in_page=36864\n\nThe above lines show our buffered write has dirtied 3 pages of inode\n259 of root 5:\n\n 704K 768K 832K 896K\n I |////I/////////////////I///////////| I\n 756K 868K\n\n |///| is the dirtied range using subpage bitmaps. and 'I' is the page\n boundary.\n\n Meanwhile all three pages (704K, 768K, 832K) have their PageDirty\n flag set.\n\n > btrfs_direct_write: r/i=5/259 start dio filepos=696320 len=102400\n\nThen direct IO writ\n---truncated---", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS:bpftool-6.6.0-76.0.0.69.oe2403.aarch64", 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