{"id":"CVE-2022-49880","state":"PUBLISHED","title":"ext4: fix warning in 'ext4_da_release_space'","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix warning in 'ext4_da_release_space'\n\nSyzkaller report issue as follows:\nEXT4-fs (loop0): Free/Dirty block details\nEXT4-fs (loop0): free_blocks=0\nEXT4-fs (loop0): dirty_blocks=0\nEXT4-fs (loop0): Block reservation details\nEXT4-fs (loop0): i_reserved_data_blocks=0\nEXT4-fs warning (device loop0): ext4_da_release_space:1527: ext4_da_release_space: ino 18, to_free 1 with only 0 reserved data blocks\n------------[ cut here ]------------\nWARNING: CPU: 0 PID: 92 at fs/ext4/inode.c:1528 ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1524\nModules linked in:\nCPU: 0 PID: 92 Comm: kworker/u4:4 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022\nWorkqueue: writeback wb_workfn (flush-7:0)\nRIP: 0010:ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1528\nRSP: 0018:ffffc900015f6c90 EFLAGS: 00010296\nRAX: 42215896cd52ea00 RBX: 0000000000000000 RCX: 42215896cd52ea00\nRDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000\nRBP: 1ffff1100e907d96 R08: ffffffff816aa79d R09: fffff520002bece5\nR10: fffff520002bece5 R11: 1ffff920002bece4 R12: ffff888021fd2000\nR13: ffff88807483ecb0 R14: 0000000000000001 R15: ffff88807483e740\nFS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00005555569ba628 CR3: 000000000c88e000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n ext4_es_remove_extent+0x1ab/0x260 fs/ext4/extents_status.c:1461\n mpage_release_unused_pages+0x24d/0xef0 fs/ext4/inode.c:1589\n ext4_writepages+0x12eb/0x3be0 fs/ext4/inode.c:2852\n do_writepages+0x3c3/0x680 mm/page-writeback.c:2469\n __writeback_single_inode+0xd1/0x670 fs/fs-writeback.c:1587\n writeback_sb_inodes+0xb3b/0x18f0 fs/fs-writeback.c:1870\n wb_writeback+0x41f/0x7b0 fs/fs-writeback.c:2044\n wb_do_writeback fs/fs-writeback.c:2187 [inline]\n wb_workfn+0x3cb/0xef0 fs/fs-writeback.c:2227\n process_one_work+0x877/0xdb0 kernel/workqueue.c:2289\n worker_thread+0xb14/0x1330 kernel/workqueue.c:2436\n kthread+0x266/0x300 kernel/kthread.c:376\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n </TASK>\n\nAbove issue may happens as follows:\next4_da_write_begin\n  ext4_create_inline_data\n    ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);\n    ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA);\n__ext4_ioctl\n  ext4_ext_migrate -> will lead to eh->eh_entries not zero, and set extent flag\next4_da_write_begin\n  ext4_da_convert_inline_data_to_extent\n    ext4_da_write_inline_data_begin\n      ext4_da_map_blocks\n        ext4_insert_delayed_block\n\t  if (!ext4_es_scan_clu(inode, &ext4_es_is_delonly, lblk))\n\t    if (!ext4_es_scan_clu(inode, &ext4_es_is_mapped, lblk))\n\t      ext4_clu_mapped(inode, EXT4_B2C(sbi, lblk)); -> will return 1\n\t       allocated = true;\n          ext4_es_insert_delayed_block(inode, lblk, allocated);\next4_writepages\n  mpage_map_and_submit_extent(handle, &mpd, &give_up_on_write); -> return -ENOSPC\n  mpage_release_unused_pages(&mpd, give_up_on_write); -> give_up_on_write == 1\n    ext4_es_remove_extent\n      ext4_da_release_space(inode, reserved);\n        if (unlikely(to_free > ei->i_reserved_data_blocks))\n\t  -> to_free == 1  but ei->i_reserved_data_blocks == 0\n\t  -> then trigger warning as above\n\nTo solve above issue, forbid inode do migrate which has inline data.","publishedAt":"2025-05-01T14:10:27.947Z","updatedAt":"2026-05-11T19:08:31.908Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"0de5ee103747fd3a24f1c010c79caabe35e8f0bb","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"c3bf1e95cfa7d950dc3c064d0c2e3d06b427bc63","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"890d738f569fa9412b70ba09f15407f17a52da20","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"72743d5598b9096950bbfd6a9b7f173d156eea97","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"5370b965b7a945bb8f48b9ee23d83a76a947902e","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"0a43c015e98121c91a76154edf42280ce1a8a883","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"89bee03d2fb8c54119b38ac6c24e7d60fae036b6","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"1b8f787ef547230a3249bcf897221ef0cc78481b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/migrate.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.8","versionType":"semver"},{"version":"4.9.333","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.299","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.265","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.224","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.154","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.78","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.8","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/migrate.c"]}],"references":["https://git.kernel.org/stable/c/0de5ee103747fd3a24f1c010c79caabe35e8f0bb","https://git.kernel.org/stable/c/c3bf1e95cfa7d950dc3c064d0c2e3d06b427bc63","https://git.kernel.org/stable/c/890d738f569fa9412b70ba09f15407f17a52da20","https://git.kernel.org/stable/c/72743d5598b9096950bbfd6a9b7f173d156eea97","https://git.kernel.org/stable/c/5370b965b7a945bb8f48b9ee23d83a76a947902e","https://git.kernel.org/stable/c/0a43c015e98121c91a76154edf42280ce1a8a883","https://git.kernel.org/stable/c/89bee03d2fb8c54119b38ac6c24e7d60fae036b6","https://git.kernel.org/stable/c/1b8f787ef547230a3249bcf897221ef0cc78481b"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49880.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49880","state":"PUBLISHED","datePublished":"2025-05-01T14:10:27.947Z","dateUpdated":"2026-05-11T19:08:31.908Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-05-01T14:05:17.239Z"},"containers":{"cna":{"title":"ext4: fix warning in 'ext4_da_release_space'","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix warning in 'ext4_da_release_space'\n\nSyzkaller report issue as follows:\nEXT4-fs (loop0): Free/Dirty block details\nEXT4-fs (loop0): free_blocks=0\nEXT4-fs (loop0): dirty_blocks=0\nEXT4-fs (loop0): Block reservation details\nEXT4-fs (loop0): i_reserved_data_blocks=0\nEXT4-fs warning (device loop0): ext4_da_release_space:1527: ext4_da_release_space: ino 18, to_free 1 with only 0 reserved data blocks\n------------[ cut here ]------------\nWARNING: CPU: 0 PID: 92 at fs/ext4/inode.c:1528 ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1524\nModules linked in:\nCPU: 0 PID: 92 Comm: kworker/u4:4 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022\nWorkqueue: writeback wb_workfn (flush-7:0)\nRIP: 0010:ext4_da_release_space+0x25e/0x370 fs/ext4/inode.c:1528\nRSP: 0018:ffffc900015f6c90 EFLAGS: 00010296\nRAX: 42215896cd52ea00 RBX: 0000000000000000 RCX: 42215896cd52ea00\nRDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000\nRBP: 1ffff1100e907d96 R08: ffffffff816aa79d R09: fffff520002bece5\nR10: fffff520002bece5 R11: 1ffff920002bece4 R12: ffff888021fd2000\nR13: ffff88807483ecb0 R14: 0000000000000001 R15: ffff88807483e740\nFS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00005555569ba628 CR3: 000000000c88e000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n ext4_es_remove_extent+0x1ab/0x260 fs/ext4/extents_status.c:1461\n mpage_release_unused_pages+0x24d/0xef0 fs/ext4/inode.c:1589\n ext4_writepages+0x12eb/0x3be0 fs/ext4/inode.c:2852\n do_writepages+0x3c3/0x680 mm/page-writeback.c:2469\n __writeback_single_inode+0xd1/0x670 fs/fs-writeback.c:1587\n writeback_sb_inodes+0xb3b/0x18f0 fs/fs-writeback.c:1870\n wb_writeback+0x41f/0x7b0 fs/fs-writeback.c:2044\n wb_do_writeback fs/fs-writeback.c:2187 [inline]\n wb_workfn+0x3cb/0xef0 fs/fs-writeback.c:2227\n process_one_work+0x877/0xdb0 kernel/workqueue.c:2289\n worker_thread+0xb14/0x1330 kernel/workqueue.c:2436\n kthread+0x266/0x300 kernel/kthread.c:376\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n </TASK>\n\nAbove issue may happens as follows:\next4_da_write_begin\n  ext4_create_inline_data\n    ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);\n    ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA);\n__ext4_ioctl\n  ext4_ext_migrate -> will lead to eh->eh_entries not zero, and set extent flag\next4_da_write_begin\n  ext4_da_convert_inline_data_to_extent\n    ext4_da_write_inline_data_begin\n      ext4_da_map_blocks\n        ext4_insert_delayed_block\n\t  if (!ext4_es_scan_clu(inode, &ext4_es_is_delonly, lblk))\n\t    if (!ext4_es_scan_clu(inode, &ext4_es_is_mapped, lblk))\n\t      ext4_clu_mapped(inode, EXT4_B2C(sbi, lblk)); -> will return 1\n\t       allocated = true;\n          ext4_es_insert_delayed_block(inode, lblk, allocated);\next4_writepages\n  mpage_map_and_submit_extent(handle, &mpd, &give_up_on_write); -> return -ENOSPC\n  mpage_release_unused_pages(&mpd, give_up_on_write); -> give_up_on_write == 1\n    ext4_es_remove_extent\n      ext4_da_release_space(inode, reserved);\n        if (unlikely(to_free > ei->i_reserved_data_blocks))\n\t  -> to_free == 1  but ei->i_reserved_data_blocks == 0\n\t  -> then trigger warning as above\n\nTo solve above issue, forbid inode do migrate which has inline data."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"0de5ee103747fd3a24f1c010c79caabe35e8f0bb","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"c3bf1e95cfa7d950dc3c064d0c2e3d06b427bc63","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"890d738f569fa9412b70ba09f15407f17a52da20","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"72743d5598b9096950bbfd6a9b7f173d156eea97","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"5370b965b7a945bb8f48b9ee23d83a76a947902e","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"0a43c015e98121c91a76154edf42280ce1a8a883","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"89bee03d2fb8c54119b38ac6c24e7d60fae036b6","versionType":"git"},{"version":"67cf5b09a46f72e048501b84996f2f77bc42e947","status":"affected","lessThan":"1b8f787ef547230a3249bcf897221ef0cc78481b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/migrate.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.8","versionType":"semver"},{"version":"4.9.333","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.299","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.265","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.224","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.154","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.78","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.8","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/migrate.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/0de5ee103747fd3a24f1c010c79caabe35e8f0bb"},{"url":"https://git.kernel.org/stable/c/c3bf1e95cfa7d950dc3c064d0c2e3d06b427bc63"},{"url":"https://git.kernel.org/stable/c/890d738f569fa9412b70ba09f15407f17a52da20"},{"url":"https://git.kernel.org/stable/c/72743d5598b9096950bbfd6a9b7f173d156eea97"},{"url":"https://git.kernel.org/stable/c/5370b965b7a945bb8f48b9ee23d83a76a947902e"},{"url":"https://git.kernel.org/stable/c/0a43c015e98121c91a76154edf42280ce1a8a883"},{"url":"https://git.kernel.org/stable/c/89bee03d2fb8c54119b38ac6c24e7d60fae036b6"},{"url":"https://git.kernel.org/stable/c/1b8f787ef547230a3249bcf897221ef0cc78481b"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:08:31.908Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"4.9.333"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"4.14.299"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"4.19.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"5.4.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"5.10.154"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"5.15.78"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.0.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.8","versionEndExcluding":"6.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-10-01T16:11:11.330119Z","id":"CVE-2022-49880","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"type":"CWE","lang":"en","description":"CWE-noinfo Not enough information"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-01T16:11:13.897Z"}}]}}}