{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50089", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-06-18T10:57:27.410Z", "datePublished": "2025-06-18T11:02:29.451Z", "dateUpdated": "2026-05-11T19:12:36.948Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:12:36.948Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: ensure pages are unlocked on cow_file_range() failure\n\nThere is a hung_task report on zoned btrfs like below.\n\nhttps://github.com/naota/linux/issues/59\n\n [726.328648] INFO: task rocksdb:high0:11085 blocked for more than 241 seconds.\n [726.329839] Not tainted 5.16.0-rc1+ #1\n [726.330484] \"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n [726.331603] task:rocksdb:high0 state:D stack: 0 pid:11085 ppid: 11082 flags:0x00000000\n [726.331608] Call Trace:\n [726.331611] \n [726.331614] __schedule+0x2e5/0x9d0\n [726.331622] schedule+0x58/0xd0\n [726.331626] io_schedule+0x3f/0x70\n [726.331629] __folio_lock+0x125/0x200\n [726.331634] ? find_get_entries+0x1bc/0x240\n [726.331638] ? filemap_invalidate_unlock_two+0x40/0x40\n [726.331642] truncate_inode_pages_range+0x5b2/0x770\n [726.331649] truncate_inode_pages_final+0x44/0x50\n [726.331653] btrfs_evict_inode+0x67/0x480\n [726.331658] evict+0xd0/0x180\n [726.331661] iput+0x13f/0x200\n [726.331664] do_unlinkat+0x1c0/0x2b0\n [726.331668] __x64_sys_unlink+0x23/0x30\n [726.331670] do_syscall_64+0x3b/0xc0\n [726.331674] entry_SYSCALL_64_after_hwframe+0x44/0xae\n [726.331677] RIP: 0033:0x7fb9490a171b\n [726.331681] RSP: 002b:00007fb943ffac68 EFLAGS: 00000246 ORIG_RAX: 0000000000000057\n [726.331684] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb9490a171b\n [726.331686] RDX: 00007fb943ffb040 RSI: 000055a6bbe6ec20 RDI: 00007fb94400d300\n [726.331687] RBP: 00007fb943ffad00 R08: 0000000000000000 R09: 0000000000000000\n [726.331688] R10: 0000000000000031 R11: 0000000000000246 R12: 00007fb943ffb000\n [726.331690] R13: 00007fb943ffb040 R14: 0000000000000000 R15: 00007fb943ffd260\n [726.331693] \n\nWhile we debug the issue, we found running fstests generic/551 on 5GB\nnon-zoned null_blk device in the emulated zoned mode also had a\nsimilar hung issue.\n\nAlso, we can reproduce the same symptom with an error injected\ncow_file_range() setup.\n\nThe hang occurs when cow_file_range() fails in the middle of\nallocation. cow_file_range() called from do_allocation_zoned() can\nsplit the give region ([start, end]) for allocation depending on\ncurrent block group usages. When btrfs can allocate bytes for one part\nof the split regions but fails for the other region (e.g. because of\n-ENOSPC), we return the error leaving the pages in the succeeded regions\nlocked. Technically, this occurs only when @unlock == 0. Otherwise, we\nunlock the pages in an allocated region after creating an ordered\nextent.\n\nConsidering the callers of cow_file_range(unlock=0) won't write out\nthe pages, we can unlock the pages on error exit from\ncow_file_range(). So, we can ensure all the pages except @locked_page\nare unlocked on error case.\n\nIn summary, cow_file_range now behaves like this:\n\n- page_started == 1 (return value)\n - All the pages are unlocked. IO is started.\n- unlock == 1\n - All the pages except @locked_page are unlocked in any case\n- unlock == 0\n - On success, all the pages are locked for writing out them\n - On failure, all the pages except @locked_page are unlocked" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/btrfs/inode.c" ], "versions": [ { "version": "42c011000963442ce533d92a492c4a057b2f5a46", "lessThan": "b367f125c80fa838eae49e3b138dc67dfc9f46ef", "status": "affected", "versionType": "git" }, { "version": "42c011000963442ce533d92a492c4a057b2f5a46", "lessThan": "9535ec371d741fa037e37eddc0a5b25ba82d0027", "status": "affected", "versionType": "git" }, { "version": "42c011000963442ce533d92a492c4a057b2f5a46", "lessThan": "e160aa87c87a9c4e0c8d1430235f715a3a91e2cd", "status": "affected", "versionType": "git" }, { "version": "42c011000963442ce533d92a492c4a057b2f5a46", "lessThan": "9ce7466f372d83054c7494f6b3e4b9abaf3f0355", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/btrfs/inode.c" ], "versions": [ { "version": "5.12", "status": "affected" }, { "version": "0", "lessThan": "5.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.61", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.18", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.2", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "5.15.61" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "5.18.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "5.19.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b367f125c80fa838eae49e3b138dc67dfc9f46ef" }, { "url": "https://git.kernel.org/stable/c/9535ec371d741fa037e37eddc0a5b25ba82d0027" }, { "url": "https://git.kernel.org/stable/c/e160aa87c87a9c4e0c8d1430235f715a3a91e2cd" }, { "url": "https://git.kernel.org/stable/c/9ce7466f372d83054c7494f6b3e4b9abaf3f0355" } ], "title": "btrfs: ensure pages are unlocked on cow_file_range() failure", "x_generator": { "engine": "bippy-1.2.0" } } } }