mirror of
https://github.com/CVEProject/cvelist.git
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158 lines
10 KiB
JSON
158 lines
10 KiB
JSON
{
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"data_version": "4.0",
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"data_type": "CVE",
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"data_format": "MITRE",
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"CVE_data_meta": {
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"ID": "CVE-2024-49868",
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"ASSIGNER": "cve@kernel.org",
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"STATE": "PUBLIC"
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},
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix a NULL pointer dereference when failed to start a new trasacntion\n\n[BUG]\nSyzbot reported a NULL pointer dereference with the following crash:\n\n FAULT_INJECTION: forcing a failure.\n start_transaction+0x830/0x1670 fs/btrfs/transaction.c:676\n prepare_to_relocate+0x31f/0x4c0 fs/btrfs/relocation.c:3642\n relocate_block_group+0x169/0xd20 fs/btrfs/relocation.c:3678\n ...\n BTRFS info (device loop0): balance: ended with status: -12\n Oops: general protection fault, probably for non-canonical address 0xdffffc00000000cc: 0000 [#1] PREEMPT SMP KASAN NOPTI\n KASAN: null-ptr-deref in range [0x0000000000000660-0x0000000000000667]\n RIP: 0010:btrfs_update_reloc_root+0x362/0xa80 fs/btrfs/relocation.c:926\n Call Trace:\n <TASK>\n commit_fs_roots+0x2ee/0x720 fs/btrfs/transaction.c:1496\n btrfs_commit_transaction+0xfaf/0x3740 fs/btrfs/transaction.c:2430\n del_balance_item fs/btrfs/volumes.c:3678 [inline]\n reset_balance_state+0x25e/0x3c0 fs/btrfs/volumes.c:3742\n btrfs_balance+0xead/0x10c0 fs/btrfs/volumes.c:4574\n btrfs_ioctl_balance+0x493/0x7c0 fs/btrfs/ioctl.c:3673\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:907 [inline]\n __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n[CAUSE]\nThe allocation failure happens at the start_transaction() inside\nprepare_to_relocate(), and during the error handling we call\nunset_reloc_control(), which makes fs_info->balance_ctl to be NULL.\n\nThen we continue the error path cleanup in btrfs_balance() by calling\nreset_balance_state() which will call del_balance_item() to fully delete\nthe balance item in the root tree.\n\nHowever during the small window between set_reloc_contrl() and\nunset_reloc_control(), we can have a subvolume tree update and created a\nreloc_root for that subvolume.\n\nThen we go into the final btrfs_commit_transaction() of\ndel_balance_item(), and into btrfs_update_reloc_root() inside\ncommit_fs_roots().\n\nThat function checks if fs_info->reloc_ctl is in the merge_reloc_tree\nstage, but since fs_info->reloc_ctl is NULL, it results a NULL pointer\ndereference.\n\n[FIX]\nJust add extra check on fs_info->reloc_ctl inside\nbtrfs_update_reloc_root(), before checking\nfs_info->reloc_ctl->merge_reloc_tree.\n\nThat DEAD_RELOC_TREE handling is to prevent further modification to the\nreloc tree during merge stage, but since there is no reloc_ctl at all,\nwe do not need to bother that."
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}
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]
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "n/a"
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}
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]
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}
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]
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"vendor_name": "Linux",
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"product": {
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"product_data": [
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{
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"product_name": "Linux",
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"version": {
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"version_data": [
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{
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"version_affected": "<",
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"version_name": "1da177e4c3f4",
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"version_value": "1282f001cbf5"
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},
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"versions": [
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{
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"version": "5.4.285",
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"lessThanOrEqual": "5.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.227",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.168",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.113",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.55",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.10.14",
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"lessThanOrEqual": "6.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.11.3",
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"lessThanOrEqual": "6.11.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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],
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"defaultStatus": "affected"
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}
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}
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]
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}
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}
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]
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}
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}
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]
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}
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},
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"references": {
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"reference_data": [
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{
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"url": "https://git.kernel.org/stable/c/1282f001cbf56e5dd6e90a18e205a566793f4be0",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/1282f001cbf56e5dd6e90a18e205a566793f4be0"
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},
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{
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"url": "https://git.kernel.org/stable/c/d73d48acf36f57362df7e4f9d76568168bf5e944",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/d73d48acf36f57362df7e4f9d76568168bf5e944"
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},
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{
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"url": "https://git.kernel.org/stable/c/37fee9c220b92c3b7bf22b51c51dde5364e7590b",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/37fee9c220b92c3b7bf22b51c51dde5364e7590b"
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},
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{
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"url": "https://git.kernel.org/stable/c/d13249c0df7aab885acb149695f82c54c0822a70",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/d13249c0df7aab885acb149695f82c54c0822a70"
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},
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{
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"url": "https://git.kernel.org/stable/c/7ad0c5868f2f0418619089513d95230c66cb7eb4",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/7ad0c5868f2f0418619089513d95230c66cb7eb4"
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},
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{
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"url": "https://git.kernel.org/stable/c/dc02c1440705e3451abd1c2c8114a5c1bb188e9f",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/dc02c1440705e3451abd1c2c8114a5c1bb188e9f"
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},
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{
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"url": "https://git.kernel.org/stable/c/39356ec0e319ed07627b3a0f402d0608546509e6",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/39356ec0e319ed07627b3a0f402d0608546509e6"
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},
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{
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"url": "https://git.kernel.org/stable/c/c3b47f49e83197e8dffd023ec568403bcdbb774b",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/c3b47f49e83197e8dffd023ec568403bcdbb774b"
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}
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]
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},
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"generator": {
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"engine": "bippy-8e903de6a542"
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} |