| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix bug_on in ext4_writepages\n\nwe got issue as follows:\nEXT4-fs error (device loop0): ext4_mb_generate_buddy:1141: group 0, block bitmap and bg descriptor inconsistent: 25 vs 31513 free cls\n------------[ cut here ]------------\nkernel BUG at fs/ext4/inode.c:2708!\ninvalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\nCPU: 2 PID: 2147 Comm: rep Not tainted 5.18.0-rc2-next-20220413+ #155\nRIP: 0010:ext4_writepages+0x1977/0x1c10\nRSP: 0018:ffff88811d3e7880 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff88811c098000\nRDX: 0000000000000000 RSI: ffff88811c098000 RDI: 0000000000000002\nRBP: ffff888128140f50 R08: ffffffffb1ff6387 R09: 0000000000000000\nR10: 0000000000000007 R11: ffffed10250281ea R12: 0000000000000001\nR13: 00000000000000a4 R14: ffff88811d3e7bb8 R15: ffff888128141028\nFS: 00007f443aed9740(0000) GS:ffff8883aef00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000020007200 CR3: 000000011c2a4000 CR4: 00000000000006e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n do_writepages+0x130/0x3a0\n filemap_fdatawrite_wbc+0x83/0xa0\n filemap_flush+0xab/0xe0\n ext4_alloc_da_blocks+0x51/0x120\n __ext4_ioctl+0x1534/0x3210\n __x64_sys_ioctl+0x12c/0x170\n do_syscall_64+0x3b/0x90\n\nIt may happen as follows:\n1. write inline_data inode\nvfs_write\n new_sync_write\n ext4_file_write_iter\n ext4_buffered_write_iter\n generic_perform_write\n ext4_da_write_begin\n ext4_da_write_inline_data_begin -> If inline data size too\n small will allocate block to write, then mapping will has\n dirty page\n ext4_da_convert_inline_data_to_extent ->clear EXT4_STATE_MAY_INLINE_DATA\n2. fallocate\ndo_vfs_ioctl\n ioctl_preallocate\n vfs_fallocate\n ext4_fallocate\n ext4_convert_inline_data\n ext4_convert_inline_data_nolock\n ext4_map_blocks -> fail will goto restore data\n ext4_restore_inline_data\n ext4_create_inline_data\n ext4_write_inline_data\n ext4_set_inode_state -> set inode EXT4_STATE_MAY_INLINE_DATA\n3. writepages\n__ext4_ioctl\n ext4_alloc_da_blocks\n filemap_flush\n filemap_fdatawrite_wbc\n do_writepages\n ext4_writepages\n if (ext4_has_inline_data(inode))\n BUG_ON(ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA))\n\nThe root cause of this issue is we destory inline data until call\next4_writepages under delay allocation mode. But there maybe already\nconvert from inline to extent. To solve this issue, we call\nfilemap_flush first.." |
| } |
| ], |
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| { |
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| "product": "Linux", |
| "vendor": "Linux", |
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| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "fs/ext4/inline.c" |
| ], |
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| { |
| "nodes": [ |
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| "operator": "OR", |
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| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/19918ec7717d87d5ab825884a46b26b21375d7ce" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/b2b78f5bf2d453dda3903955efee059260787a42" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/de1732b5c1693ad489c5d254f124f67cb775f37d" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/73fd5b19285197078ee8a2e651d75d5b094a4de9" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/1b061af037646c9cdb0afd8a8d2f1e1c06285866" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/18a759f7f99f0b65a08ff5b7e745fc405a42bde4" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/1cde35417edc0370fb0179a4e38b78a15350a8d0" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/013f12bdedb96816aaa27ee04349f4433d361f52" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/ef09ed5d37b84d18562b30cf7253e57062d0db05" |
| } |
| ], |
| "title": "ext4: fix bug_on in ext4_writepages", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2022-49347", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
