{"id":"CVE-2022-49068","aliases":["DEBIAN-CVE-2022-49068","EUVD-2022-55136","GHSA-vm76-7cfx-c7v2","UBUNTU-CVE-2022-49068"],"status":"published","title":"btrfs: release correct delalloc amount in direct IO write path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: release correct delalloc amount in direct IO write path\n\nRunning generic/406 causes the following WARNING in btrfs_destroy_inode()\nwhich tells there are outstanding extents left.\n\nIn btrfs_get_blocks_direct_write(), we reserve a temporary outstanding\nextents with btrfs_delalloc_reserve_metadata() (or indirectly from\nbtrfs_delalloc_reserve_space(()). We then release the outstanding extents\nwith btrfs_delalloc_release_extents(). However, the \"len\" can be modified\nin the COW case, which releases fewer outstanding extents than expected.\n\nFix it by calling btrfs_delalloc_release_extents() for the original length.\n\nTo reproduce the warning, the filesystem should be 1 GiB.  It's\ntriggering a short-write, due to not being able to allocate a large\nextent and instead allocating a smaller one.\n\n  WARNING: CPU: 0 PID: 757 at fs/btrfs/inode.c:8848 btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n  Modules linked in: btrfs blake2b_generic xor lzo_compress\n  lzo_decompress raid6_pq zstd zstd_decompress zstd_compress xxhash zram\n  zsmalloc\n  CPU: 0 PID: 757 Comm: umount Not tainted 5.17.0-rc8+ #101\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS d55cb5a 04/01/2014\n  RIP: 0010:btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n  RSP: 0018:ffffc9000327bda8 EFLAGS: 00010206\n  RAX: 0000000000000000 RBX: ffff888100548b78 RCX: 0000000000000000\n  RDX: 0000000000026900 RSI: 0000000000000000 RDI: ffff888100548b78\n  RBP: ffff888100548940 R08: 0000000000000000 R09: ffff88810b48aba8\n  R10: 0000000000000001 R11: ffff8881004eb240 R12: ffff88810b48a800\n  R13: ffff88810b48ec08 R14: ffff88810b48ed00 R15: ffff888100490c68\n  FS:  00007f8549ea0b80(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 00007f854a09e733 CR3: 000000010a2e9003 CR4: 0000000000370eb0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  Call Trace:\n   \u003cTASK\u003e\n   destroy_inode+0x33/0x70\n   dispose_list+0x43/0x60\n   evict_inodes+0x161/0x1b0\n   generic_shutdown_super+0x2d/0x110\n   kill_anon_super+0xf/0x20\n   btrfs_kill_super+0xd/0x20 [btrfs]\n   deactivate_locked_super+0x27/0x90\n   cleanup_mnt+0x12c/0x180\n   task_work_run+0x54/0x80\n   exit_to_user_mode_prepare+0x152/0x160\n   syscall_exit_to_user_mode+0x12/0x30\n   do_syscall_64+0x42/0x80\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n   RIP: 0033:0x7f854a000fb7","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00258,"percentile":0.17673,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2025-02-26T01:54:35Z","modified":"2026-10-28T02:30:30Z","fixes":[{"ecosystem":"Linux","package":"Kernel","fixed_in":["5.15.35","5.17.4"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"linux","fixed_in":["5.17.6-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"linux","fixed_in":["5.17.6-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"linux","fixed_in":["5.17.6-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-azure-5.15","fixed_in":["5.15.0-1008.9~20.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-hwe-5.15","fixed_in":["5.15.0-41.44~20.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"linux-lowlatency-hwe-5.15","fixed_in":["5.15.0-42.45~20.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"linux","fixed_in":["5.15.0-37.39"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"linux-aws","fixed_in":["5.15.0-1011.14"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"linux-azure","fixed_in":["5.15.0-1010.12"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"linux-gcp","fixed_in":["5.15.0-1008.12"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"linux-gke","fixed_in":["5.15.0-1008.10"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"linux-ibm","fixed_in":["5.15.0-1007.8"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"linux-intel-iotg","fixed_in":["5.15.0-1008.11"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"linux-kvm","fixed_in":["5.15.0-1010.11"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"linux-lowlatency","fixed_in":["5.15.0-37.39"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"linux-oracle","fixed_in":["5.15.0-1009.12"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"linux-raspi","fixed_in":["5.15.0-1011.13"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:Realtime:22.04:LTS","package":"linux-realtime","fixed_in":["5.15.0-1014.14"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Linux","package":"Kernel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.35"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"5.17.4"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.17.6-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.17.6-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.17.6-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"linux-hwe-edge","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.0-28.30~16.04.1","4.8.0-30.32~16.04.1","4.8.0-32.34~16.04.1","4.8.0-34.36~16.04.1","4.10.0-14.16~16.04.1","4.10.0-19.21~16.04.1","4.10.0-20.22~16.04.1","4.10.0-21.23~16.04.1","4.10.0-22.24~16.04.1","4.10.0-24.28~16.04.1","4.10.0-26.30~16.04.1","4.11.0-13.19~16.04.1","4.11.0-14.20~16.04.1","4.13.0-16.19~16.04.3","4.13.0-17.20~16.04.1","4.13.0-19.22~16.04.1","4.13.0-21.24~16.04.1","4.13.0-25.29~16.04.2","4.15.0-13.14~16.04.1","4.15.0-15.16~16.04.1","4.15.0-20.21~16.04.1","4.15.0-22.24~16.04.1","4.15.0-23.25~16.04.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-aws-5.0","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.0-1021.24~18.04.1","5.0.0-1022.25~18.04.1","5.0.0-1023.26~18.04.1","5.0.0-1024.27~18.04.1","5.0.0-1025.28","5.0.0-1027.30"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-aws-5.3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.0-1016.17~18.04.1","5.3.0-1017.18~18.04.1","5.3.0-1019.21~18.04.1","5.3.0-1023.25~18.04.1","5.3.0-1028.30~18.04.1","5.3.0-1030.32~18.04.1","5.3.0-1032.34~18.04.2","5.3.0-1033.35","5.3.0-1034.36","5.3.0-1035.37"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-azure","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.15.0-1002.2","4.15.0-1003.3","4.15.0-1004.4","4.15.0-1008.8","4.15.0-1009.9","4.15.0-1012.12","4.15.0-1013.13","4.15.0-1014.14","4.15.0-1018.18","4.15.0-1019.19","4.15.0-1021.21","4.15.0-1022.23","4.15.0-1023.24","4.15.0-1025.26","4.15.0-1028.29","4.15.0-1030.31","4.15.0-1031.32","4.15.0-1032.33","4.15.0-1035.36","4.15.0-1036.38","4.15.0-1037.39","4.18.0-1011.11~18.04.1","4.18.0-1013.13~18.04.1","4.18.0-1014.14~18.04.1","4.18.0-1018.18~18.04.1","4.18.0-1019.19~18.04.1","4.18.0-102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release correct delalloc amount in direct IO write path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: release correct delalloc amount in direct IO write path\n\nRunning generic/406 causes the following WARNING in btrfs_destroy_inode()\nwhich tells there are outstanding extents left.\n\nIn btrfs_get_blocks_direct_write(), we reserve a temporary outstanding\nextents with btrfs_delalloc_reserve_metadata() (or indirectly from\nbtrfs_delalloc_reserve_space(()). We then release the outstanding extents\nwith btrfs_delalloc_release_extents(). However, the \"len\" can be modified\nin the COW case, which releases fewer outstanding extents than expected.\n\nFix it by calling btrfs_delalloc_release_extents() for the original length.\n\nTo reproduce the warning, the filesystem should be 1 GiB.  It's\ntriggering a short-write, due to not being able to allocate a large\nextent and instead allocating a smaller one.\n\n  WARNING: CPU: 0 PID: 757 at fs/btrfs/inode.c:8848 btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n  Modules linked in: btrfs blake2b_generic xor lzo_compress\n  lzo_decompress raid6_pq zstd zstd_decompress zstd_compress xxhash zram\n  zsmalloc\n  CPU: 0 PID: 757 Comm: umount Not tainted 5.17.0-rc8+ #101\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS d55cb5a 04/01/2014\n  RIP: 0010:btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n  RSP: 0018:ffffc9000327bda8 EFLAGS: 00010206\n  RAX: 0000000000000000 RBX: ffff888100548b78 RCX: 0000000000000000\n  RDX: 0000000000026900 RSI: 0000000000000000 RDI: ffff888100548b78\n  RBP: ffff888100548940 R08: 0000000000000000 R09: ffff88810b48aba8\n  R10: 0000000000000001 R11: ffff8881004eb240 R12: ffff88810b48a800\n  R13: ffff88810b48ec08 R14: ffff88810b48ed00 R15: ffff888100490c68\n  FS:  00007f8549ea0b80(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 00007f854a09e733 CR3: 000000010a2e9003 CR4: 0000000000370eb0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  Call Trace:\n   \u003cTASK\u003e\n   destroy_inode+0x33/0x70\n   dispose_list+0x43/0x60\n   evict_inodes+0x161/0x1b0\n   generic_shutdown_super+0x2d/0x110\n   kill_anon_super+0xf/0x20\n   btrfs_kill_super+0xd/0x20 [btrfs]\n   deactivate_locked_super+0x27/0x90\n   cleanup_mnt+0x12c/0x180\n   task_work_run+0x54/0x80\n   exit_to_user_mode_prepare+0x152/0x160\n   syscall_exit_to_user_mode+0x12/0x30\n   do_syscall_64+0x42/0x80\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n   RIP: 0033:0x7f854a000fb7","status":"published","published":"2025-02-26T01:54:35.34Z","modified":"2026-05-23T15:21:30.12Z","updated_at":"2026-11-02T14:34:23.516065Z"}],"euvd":[{"id":"EUVD-2022-55136","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: release correct delalloc amount in direct IO write path\n\nRunning generic/406 causes the following WARNING in btrfs_destroy_inode()\nwhich tells there are outstanding extents left.\n\nIn btrfs_get_blocks_direct_write(), we reserve a temporary outstanding\nextents with btrfs_delalloc_reserve_metadata() (or indirectly from\nbtrfs_delalloc_reserve_space(()). We then release the outstanding extents\nwith btrfs_delalloc_release_extents(). However, the \"len\" can be modified\nin the COW case, which releases fewer outstanding extents than expected.\n\nFix it by calling btrfs_delalloc_release_extents() for the original length.\n\nTo reproduce the warning, the filesystem should be 1 GiB.  It's\ntriggering a short-write, due to not being able to allocate a large\nextent and instead allocating a smaller one.\n\n  WARNING: CPU: 0 PID: 757 at fs/btrfs/inode.c:8848 btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n  Modules linked in: btrfs blake2b_generic xor lzo_compress\n  lzo_decompress raid6_pq zstd zstd_decompress zstd_compress xxhash zram\n  zsmalloc\n  CPU: 0 PID: 757 Comm: umount Not tainted 5.17.0-rc8+ #101\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS d55cb5a 04/01/2014\n  RIP: 0010:btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n  RSP: 0018:ffffc9000327bda8 EFLAGS: 00010206\n  RAX: 0000000000000000 RBX: ffff888100548b78 RCX: 0000000000000000\n  RDX: 0000000000026900 RSI: 0000000000000000 RDI: ffff888100548b78\n  RBP: ffff888100548940 R08: 0000000000000000 R09: ffff88810b48aba8\n  R10: 0000000000000001 R11: ffff8881004eb240 R12: ffff88810b48a800\n  R13: ffff88810b48ec08 R14: ffff88810b48ed00 R15: ffff888100490c68\n  FS:  00007f8549ea0b80(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 00007f854a09e733 CR3: 000000010a2e9003 CR4: 0000000000370eb0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  Call Trace:\n   \u003cTASK\u003e\n   destroy_inode+0x33/0x70\n   dispose_list+0x43/0x60\n   evict_inodes+0x161/0x1b0\n   generic_shutdown_super+0x2d/0x110\n   kill_anon_super+0xf/0x20\n   btrfs_kill_super+0xd/0x20 [btrfs]\n   deactivate_locked_super+0x27/0x90\n   cleanup_mnt+0x12c/0x180\n   task_work_run+0x54/0x80\n   exit_to_user_mode_prepare+0x152/0x160\n   syscall_exit_to_user_mode+0x12/0x30\n   do_syscall_64+0x42/0x80\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n   RIP: 0033:0x7f854a000fb7","status":"published","published":"2025-02-26T01:54:35Z","modified":"2026-05-23T15:21:30Z","updated_at":"2026-11-02T18:21:11.700694Z"}],"ghsa":[{"id":"GHSA-vm76-7cfx-c7v2","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: release correct...","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: release correct delalloc amount in direct IO write path\n\nRunning generic/406 causes the following WARNING in btrfs_destroy_inode()\nwhich tells there are outstanding extents left.\n\nIn btrfs_get_blocks_direct_write(), we reserve a temporary outstanding\nextents with btrfs_delalloc_reserve_metadata() (or indirectly from\nbtrfs_delalloc_reserve_space(()). We then release the outstanding extents\nwith btrfs_delalloc_release_extents(). However, the \"len\" can be modified\nin the COW case, which releases fewer outstanding extents than expected.\n\nFix it by calling btrfs_delalloc_release_extents() for the original length.\n\nTo reproduce the warning, the filesystem should be 1 GiB.  It's\ntriggering a short-write, due to not being able to allocate a large\nextent and instead allocating a smaller one.\n\n  WARNING: CPU: 0 PID: 757 at fs/btrfs/inode.c:8848 btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n  Modules linked in: btrfs blake2b_generic xor lzo_compress\n  lzo_decompress raid6_pq zstd zstd_decompress zstd_compress xxhash zram\n  zsmalloc\n  CPU: 0 PID: 757 Comm: umount Not tainted 5.17.0-rc8+ #101\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS d55cb5a 04/01/2014\n  RIP: 0010:btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n  RSP: 0018:ffffc9000327bda8 EFLAGS: 00010206\n  RAX: 0000000000000000 RBX: ffff888100548b78 RCX: 0000000000000000\n  RDX: 0000000000026900 RSI: 0000000000000000 RDI: ffff888100548b78\n  RBP: ffff888100548940 R08: 0000000000000000 R09: ffff88810b48aba8\n  R10: 0000000000000001 R11: ffff8881004eb240 R12: ffff88810b48a800\n  R13: ffff88810b48ec08 R14: ffff88810b48ed00 R15: ffff888100490c68\n  FS:  00007f8549ea0b80(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 00007f854a09e733 CR3: 000000010a2e9003 CR4: 0000000000370eb0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  Call Trace:\n   \u003cTASK\u003e\n   destroy_inode+0x33/0x70\n   dispose_list+0x43/0x60\n   evict_inodes+0x161/0x1b0\n   generic_shutdown_super+0x2d/0x110\n   kill_anon_super+0xf/0x20\n   btrfs_kill_super+0xd/0x20 [btrfs]\n   deactivate_locked_super+0x27/0x90\n   cleanup_mnt+0x12c/0x180\n   task_work_run+0x54/0x80\n   exit_to_user_mode_prepare+0x152/0x160\n   syscall_exit_to_user_mode+0x12/0x30\n   do_syscall_64+0x42/0x80\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n   RIP: 0033:0x7f854a000fb7","status":"published","published":"2025-10-14T21:30:25Z","modified":"2025-10-14T21:30:32Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:03:58.523415Z"}],"nvd":[{"id":"CVE-2022-49068","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: release correct delalloc amount in direct IO write path\n\nRunning generic/406 causes the following WARNING in btrfs_destroy_inode()\nwhich tells there are outstanding extents left.\n\nIn btrfs_get_blocks_direct_write(), we reserve a temporary outstanding\nextents with btrfs_delalloc_reserve_metadata() (or indirectly from\nbtrfs_delalloc_reserve_space(()). We then release the outstanding extents\nwith btrfs_delalloc_release_extents(). However, the \"len\" can be modified\nin the COW case, which releases fewer outstanding extents than expected.\n\nFix it by calling btrfs_delalloc_release_extents() for the original length.\n\nTo reproduce the warning, the filesystem should be 1 GiB.  It's\ntriggering a short-write, due to not being able to allocate a large\nextent and instead allocating a smaller one.\n\n  WARNING: CPU: 0 PID: 757 at fs/btrfs/inode.c:8848 btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n  Modules linked in: btrfs blake2b_generic xor lzo_compress\n  lzo_decompress raid6_pq zstd zstd_decompress zstd_compress xxhash zram\n  zsmalloc\n  CPU: 0 PID: 757 Comm: umount Not tainted 5.17.0-rc8+ #101\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS d55cb5a 04/01/2014\n  RIP: 0010:btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n  RSP: 0018:ffffc9000327bda8 EFLAGS: 00010206\n  RAX: 0000000000000000 RBX: ffff888100548b78 RCX: 0000000000000000\n  RDX: 0000000000026900 RSI: 0000000000000000 RDI: ffff888100548b78\n  RBP: ffff888100548940 R08: 0000000000000000 R09: ffff88810b48aba8\n  R10: 0000000000000001 R11: ffff8881004eb240 R12: ffff88810b48a800\n  R13: ffff88810b48ec08 R14: ffff88810b48ed00 R15: ffff888100490c68\n  FS:  00007f8549ea0b80(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 00007f854a09e733 CR3: 000000010a2e9003 CR4: 0000000000370eb0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  Call Trace:\n   \u003cTASK\u003e\n   destroy_inode+0x33/0x70\n   dispose_list+0x43/0x60\n   evict_inodes+0x161/0x1b0\n   generic_shutdown_super+0x2d/0x110\n   kill_anon_super+0xf/0x20\n   btrfs_kill_super+0xd/0x20 [btrfs]\n   deactivate_locked_super+0x27/0x90\n   cleanup_mnt+0x12c/0x180\n   task_work_run+0x54/0x80\n   exit_to_user_mode_prepare+0x152/0x160\n   syscall_exit_to_user_mode+0x12/0x30\n   do_syscall_64+0x42/0x80\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n   RIP: 0033:0x7f854a000fb7","status":"published","published":"2025-02-26T07:00:44.027Z","modified":"2026-06-17T05:16:59.537Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:40.977475Z"}],"osv":[{"id":"DEBIAN-CVE-2022-49068","description":"In the Linux kernel, the following vulnerability has been resolved:  btrfs: release correct delalloc amount in direct IO write path  Running generic/406 causes the following WARNING in btrfs_destroy_inode() which tells there are outstanding extents left.  In btrfs_get_blocks_direct_write(), we reserve a temporary outstanding extents with btrfs_delalloc_reserve_metadata() (or indirectly from btrfs_delalloc_reserve_space(()). We then release the outstanding extents with btrfs_delalloc_release_extents(). However, the \"len\" can be modified in the COW case, which releases fewer outstanding extents than expected.  Fix it by calling btrfs_delalloc_release_extents() for the original length.  To reproduce the warning, the filesystem should be 1 GiB.  It's triggering a short-write, due to not being able to allocate a large extent and instead allocating a smaller one.    WARNING: CPU: 0 PID: 757 at fs/btrfs/inode.c:8848 btrfs_destroy_inode+0x1e6/0x210 [btrfs]   Modules linked in: btrfs blake2b_generic xor lzo_compress   lzo_decompress raid6_pq zstd zstd_decompress zstd_compress xxhash zram   zsmalloc   CPU: 0 PID: 757 Comm: umount Not tainted 5.17.0-rc8+ #101   Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS d55cb5a 04/01/2014   RIP: 0010:btrfs_destroy_inode+0x1e6/0x210 [btrfs]   RSP: 0018:ffffc9000327bda8 EFLAGS: 00010206   RAX: 0000000000000000 RBX: ffff888100548b78 RCX: 0000000000000000   RDX: 0000000000026900 RSI: 0000000000000000 RDI: ffff888100548b78   RBP: ffff888100548940 R08: 0000000000000000 R09: ffff88810b48aba8   R10: 0000000000000001 R11: ffff8881004eb240 R12: ffff88810b48a800   R13: ffff88810b48ec08 R14: ffff88810b48ed00 R15: ffff888100490c68   FS:  00007f8549ea0b80(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033   CR2: 00007f854a09e733 CR3: 000000010a2e9003 CR4: 0000000000370eb0   DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000   DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400   Call Trace:    \u003cTASK\u003e    destroy_inode+0x33/0x70    dispose_list+0x43/0x60    evict_inodes+0x161/0x1b0    generic_shutdown_super+0x2d/0x110    kill_anon_super+0xf/0x20    btrfs_kill_super+0xd/0x20 [btrfs]    deactivate_locked_super+0x27/0x90    cleanup_mnt+0x12c/0x180    task_work_run+0x54/0x80    exit_to_user_mode_prepare+0x152/0x160    syscall_exit_to_user_mode+0x12/0x30    do_syscall_64+0x42/0x80    entry_SYSCALL_64_after_hwframe+0x44/0xae    RIP: 0033:0x7f854a000fb7","status":"published","published":"2025-02-26T07:00:44.027Z","modified":"2026-11-03T08:04:13.701161656Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T08:22:41.604773Z"},{"id":"UBUNTU-CVE-2022-49068","description":"In the Linux kernel, the following vulnerability has been resolved: btrfs: release correct delalloc amount in direct IO write path Running generic/406 causes the following WARNING in btrfs_destroy_inode() which tells there are outstanding extents left. In btrfs_get_blocks_direct_write(), we reserve a temporary outstanding extents with btrfs_delalloc_reserve_metadata() (or indirectly from btrfs_delalloc_reserve_space(()). We then release the outstanding extents with btrfs_delalloc_release_extents(). However, the \"len\" can be modified in the COW case, which releases fewer outstanding extents than expected. Fix it by calling btrfs_delalloc_release_extents() for the original length. To reproduce the warning, the filesystem should be 1 GiB.  It's triggering a short-write, due to not being able to allocate a large extent and instead allocating a smaller one.   WARNING: CPU: 0 PID: 757 at fs/btrfs/inode.c:8848 btrfs_destroy_inode+0x1e6/0x210 [btrfs]   Modules linked in: btrfs blake2b_generic xor lzo_compress   lzo_decompress raid6_pq zstd zstd_decompress zstd_compress xxhash zram   zsmalloc   CPU: 0 PID: 757 Comm: umount Not tainted 5.17.0-rc8+ #101   Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS d55cb5a 04/01/2014   RIP: 0010:btrfs_destroy_inode+0x1e6/0x210 [btrfs]   RSP: 0018:ffffc9000327bda8 EFLAGS: 00010206   RAX: 0000000000000000 RBX: ffff888100548b78 RCX: 0000000000000000   RDX: 0000000000026900 RSI: 0000000000000000 RDI: ffff888100548b78   RBP: ffff888100548940 R08: 0000000000000000 R09: ffff88810b48aba8   R10: 0000000000000001 R11: ffff8881004eb240 R12: ffff88810b48a800   R13: ffff88810b48ec08 R14: ffff88810b48ed00 R15: ffff888100490c68   FS:  00007f8549ea0b80(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033   CR2: 00007f854a09e733 CR3: 000000010a2e9003 CR4: 0000000000370eb0   DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000   DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400   Call Trace:    \u003cTASK\u003e    destroy_inode+0x33/0x70    dispose_list+0x43/0x60    evict_inodes+0x161/0x1b0    generic_shutdown_super+0x2d/0x110    kill_anon_super+0xf/0x20    btrfs_kill_super+0xd/0x20 [btrfs]    deactivate_locked_super+0x27/0x90    cleanup_mnt+0x12c/0x180    task_work_run+0x54/0x80    exit_to_user_mode_prepare+0x152/0x160    syscall_exit_to_user_mode+0x12/0x30    do_syscall_64+0x42/0x80    entry_SYSCALL_64_after_hwframe+0x44/0xae    RIP: 0033:0x7f854a000fb7","status":"published","published":"2025-02-26T07:00:00Z","modified":"2026-04-22T13:37:39.529182Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:53:58.967204Z"},{"id":"CVE-2022-49068","title":"btrfs: release correct delalloc amount in direct IO write path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: release correct delalloc amount in direct IO write path\n\nRunning generic/406 causes the following WARNING in btrfs_destroy_inode()\nwhich tells there are outstanding extents left.\n\nIn btrfs_get_blocks_direct_write(), we reserve a temporary outstanding\nextents with btrfs_delalloc_reserve_metadata() (or indirectly from\nbtrfs_delalloc_reserve_space(()). We then release the outstanding extents\nwith btrfs_delalloc_release_extents(). However, the \"len\" can be modified\nin the COW case, which releases fewer outstanding extents than expected.\n\nFix it by calling btrfs_delalloc_release_extents() for the original length.\n\nTo reproduce the warning, the filesystem should be 1 GiB.  It's\ntriggering a short-write, due to not being able to allocate a large\nextent and instead allocating a smaller one.\n\n  WARNING: CPU: 0 PID: 757 at fs/btrfs/inode.c:8848 btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n  Modules linked in: btrfs blake2b_generic xor lzo_compress\n  lzo_decompress raid6_pq zstd zstd_decompress zstd_compress xxhash zram\n  zsmalloc\n  CPU: 0 PID: 757 Comm: umount Not tainted 5.17.0-rc8+ #101\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS d55cb5a 04/01/2014\n  RIP: 0010:btrfs_destroy_inode+0x1e6/0x210 [btrfs]\n  RSP: 0018:ffffc9000327bda8 EFLAGS: 00010206\n  RAX: 0000000000000000 RBX: ffff888100548b78 RCX: 0000000000000000\n  RDX: 0000000000026900 RSI: 0000000000000000 RDI: ffff888100548b78\n  RBP: ffff888100548940 R08: 0000000000000000 R09: ffff88810b48aba8\n  R10: 0000000000000001 R11: ffff8881004eb240 R12: ffff88810b48a800\n  R13: ffff88810b48ec08 R14: ffff88810b48ed00 R15: ffff888100490c68\n  FS:  00007f8549ea0b80(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 00007f854a09e733 CR3: 000000010a2e9003 CR4: 0000000000370eb0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  Call Trace:\n   \u003cTASK\u003e\n   destroy_inode+0x33/0x70\n   dispose_list+0x43/0x60\n   evict_inodes+0x161/0x1b0\n   generic_shutdown_super+0x2d/0x110\n   kill_anon_super+0xf/0x20\n   btrfs_kill_super+0xd/0x20 [btrfs]\n   deactivate_locked_super+0x27/0x90\n   cleanup_mnt+0x12c/0x180\n   task_work_run+0x54/0x80\n   exit_to_user_mode_prepare+0x152/0x160\n   syscall_exit_to_user_mode+0x12/0x30\n   do_syscall_64+0x42/0x80\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n   RIP: 0033:0x7f854a000fb7","status":"published","published":"2025-02-26T01:54:35.34Z","modified":"2026-10-28T02:30:30.556110317Z","updated_at":"2026-11-02T15:44:28.090335Z"}]}}