{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2023-52900", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix general protection fault in nilfs_btree_insert()\n\nIf nilfs2 reads a corrupted disk image and tries to reads a b-tree node\nblock by calling __nilfs_btree_get_block() against an invalid virtual\nblock address, it returns -ENOENT because conversion of the virtual block\naddress to a disk block address fails. However, this return value is the\nsame as the internal code that b-tree lookup routines return to indicate\nthat the block being searched does not exist, so functions that operate on\nthat b-tree may misbehave.\n\nWhen nilfs_btree_insert() receives this spurious 'not found' code from\nnilfs_btree_do_lookup(), it misunderstands that the 'not found' check was\nsuccessful and continues the insert operation using incomplete lookup path\ndata, causing the following crash:\n\n general protection fault, probably for non-canonical address\n 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN\n KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]\n ...\n RIP: 0010:nilfs_btree_get_nonroot_node fs/nilfs2/btree.c:418 [inline]\n RIP: 0010:nilfs_btree_prepare_insert fs/nilfs2/btree.c:1077 [inline]\n RIP: 0010:nilfs_btree_insert+0x6d3/0x1c10 fs/nilfs2/btree.c:1238\n Code: bc 24 80 00 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89\n ff e8 4b 02 92 fe 4d 8b 3f 49 83 c7 28 4c 89 f8 48 c1 e8 03 <42> 80 3c\n 28 00 74 08 4c 89 ff e8 2e 02 92 fe 4d 8b 3f 49 83 c7 02\n ...\n Call Trace:\n \n nilfs_bmap_do_insert fs/nilfs2/bmap.c:121 [inline]\n nilfs_bmap_insert+0x20d/0x360 fs/nilfs2/bmap.c:147\n nilfs_get_block+0x414/0x8d0 fs/nilfs2/inode.c:101\n __block_write_begin_int+0x54c/0x1a80 fs/buffer.c:1991\n __block_write_begin fs/buffer.c:2041 [inline]\n block_write_begin+0x93/0x1e0 fs/buffer.c:2102\n nilfs_write_begin+0x9c/0x110 fs/nilfs2/inode.c:261\n generic_perform_write+0x2e4/0x5e0 mm/filemap.c:3772\n __generic_file_write_iter+0x176/0x400 mm/filemap.c:3900\n generic_file_write_iter+0xab/0x310 mm/filemap.c:3932\n call_write_iter include/linux/fs.h:2186 [inline]\n new_sync_write fs/read_write.c:491 [inline]\n vfs_write+0x7dc/0xc50 fs/read_write.c:584\n ksys_write+0x177/0x2a0 fs/read_write.c:637\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n ...\n \n\nThis patch fixes the root cause of this problem by replacing the error\ncode that __nilfs_btree_get_block() returns on block address conversion\nfailure from -ENOENT to another internal code -EINVAL which means that the\nb-tree metadata is corrupted.\n\nBy returning -EINVAL, it propagates without glitches, and for all relevant\nb-tree operations, functions in the upper bmap layer output an error\nmessage indicating corrupted b-tree metadata via\nnilfs_bmap_convert_error(), and code -EIO will be eventually returned as\nit should be." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "1da177e4c3f4", "version_value": "3c2a2ff67d46" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "4.14.304", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "custom" }, { "version": "4.19.271", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.230", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.165", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.90", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.8", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/3c2a2ff67d46106715c2132021b98bd057c27545", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/3c2a2ff67d46106715c2132021b98bd057c27545" }, { "url": "https://git.kernel.org/stable/c/d9fde9eab1766170ff2ade67d09178d2cfd78749", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/d9fde9eab1766170ff2ade67d09178d2cfd78749" }, { "url": "https://git.kernel.org/stable/c/b0ba060d3287108eba17603bee3810e4cf2c272d", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/b0ba060d3287108eba17603bee3810e4cf2c272d" }, { "url": "https://git.kernel.org/stable/c/712bd74eccb9d3626a0a236641962eca8e11a243", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/712bd74eccb9d3626a0a236641962eca8e11a243" }, { "url": "https://git.kernel.org/stable/c/45627a1a6450662e1e0f8174ef07b05710a20062", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/45627a1a6450662e1e0f8174ef07b05710a20062" }, { "url": "https://git.kernel.org/stable/c/0bf463939c09e5b2c35c71ed74a5fd60a74d6a04", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/0bf463939c09e5b2c35c71ed74a5fd60a74d6a04" }, { "url": "https://git.kernel.org/stable/c/7633355e5c7f29c049a9048e461427d1d8ed3051", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/7633355e5c7f29c049a9048e461427d1d8ed3051" } ] }, "generator": { "engine": "bippy-c9c4e1df01b2" } }