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cvelist/2025/21xxx/CVE-2025-21754.json
CVE Team 1e04d332ba
"-Synchronized-Data."
2025-02-27 03:00:47 +00:00

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{
"data_version": "4.0",
"data_type": "CVE",
"data_format": "MITRE",
"CVE_data_meta": {
"ID": "CVE-2025-21754",
"ASSIGNER": "cve@kernel.org",
"STATE": "PUBLIC"
},
"description": {
"description_data": [
{
"lang": "eng",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix assertion failure when splitting ordered extent after transaction abort\n\nIf while we are doing a direct IO write a transaction abort happens, we\nmark all existing ordered extents with the BTRFS_ORDERED_IOERR flag (done\nat btrfs_destroy_ordered_extents()), and then after that if we enter\nbtrfs_split_ordered_extent() and the ordered extent has bytes left\n(meaning we have a bio that doesn't cover the whole ordered extent, see\ndetails at btrfs_extract_ordered_extent()), we will fail on the following\nassertion at btrfs_split_ordered_extent():\n\n ASSERT(!(flags & ~BTRFS_ORDERED_TYPE_FLAGS));\n\nbecause the BTRFS_ORDERED_IOERR flag is set and the definition of\nBTRFS_ORDERED_TYPE_FLAGS is just the union of all flags that identify the\ntype of write (regular, nocow, prealloc, compressed, direct IO, encoded).\n\nFix this by returning an error from btrfs_extract_ordered_extent() if we\nfind the BTRFS_ORDERED_IOERR flag in the ordered extent. The error will\nbe the error that resulted in the transaction abort or -EIO if no\ntransaction abort happened.\n\nThis was recently reported by syzbot with the following trace:\n\n FAULT_INJECTION: forcing a failure.\n name failslab, interval 1, probability 0, space 0, times 1\n CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted 6.13.0-rc5-syzkaller #0\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\n Call Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120\n fail_dump lib/fault-inject.c:53 [inline]\n should_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:154\n should_failslab+0xac/0x100 mm/failslab.c:46\n slab_pre_alloc_hook mm/slub.c:4072 [inline]\n slab_alloc_node mm/slub.c:4148 [inline]\n __do_kmalloc_node mm/slub.c:4297 [inline]\n __kmalloc_noprof+0xdd/0x4c0 mm/slub.c:4310\n kmalloc_noprof include/linux/slab.h:905 [inline]\n kzalloc_noprof include/linux/slab.h:1037 [inline]\n btrfs_chunk_alloc_add_chunk_item+0x244/0x1100 fs/btrfs/volumes.c:5742\n reserve_chunk_space+0x1ca/0x2c0 fs/btrfs/block-group.c:4292\n check_system_chunk fs/btrfs/block-group.c:4319 [inline]\n do_chunk_alloc fs/btrfs/block-group.c:3891 [inline]\n btrfs_chunk_alloc+0x77b/0xf80 fs/btrfs/block-group.c:4187\n find_free_extent_update_loop fs/btrfs/extent-tree.c:4166 [inline]\n find_free_extent+0x42d1/0x5810 fs/btrfs/extent-tree.c:4579\n btrfs_reserve_extent+0x422/0x810 fs/btrfs/extent-tree.c:4672\n btrfs_new_extent_direct fs/btrfs/direct-io.c:186 [inline]\n btrfs_get_blocks_direct_write+0x706/0xfa0 fs/btrfs/direct-io.c:321\n btrfs_dio_iomap_begin+0xbb7/0x1180 fs/btrfs/direct-io.c:525\n iomap_iter+0x697/0xf60 fs/iomap/iter.c:90\n __iomap_dio_rw+0xeb9/0x25b0 fs/iomap/direct-io.c:702\n btrfs_dio_write fs/btrfs/direct-io.c:775 [inline]\n btrfs_direct_write+0x610/0xa30 fs/btrfs/direct-io.c:880\n btrfs_do_write_iter+0x2a0/0x760 fs/btrfs/file.c:1397\n do_iter_readv_writev+0x600/0x880\n vfs_writev+0x376/0xba0 fs/read_write.c:1050\n do_pwritev fs/read_write.c:1146 [inline]\n __do_sys_pwritev2 fs/read_write.c:1204 [inline]\n __se_sys_pwritev2+0x196/0x2b0 fs/read_write.c:1195\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 RIP: 0033:0x7f1281f85d29\n RSP: 002b:00007f12819fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148\n RAX: ffffffffffffffda RBX: 00007f1282176080 RCX: 00007f1281f85d29\n RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000005\n RBP: 00007f12819fe090 R08: 0000000000000000 R09: 0000000000000003\n R10: 0000000000007000 R11: 0000000000000246 R12: 0000000000000002\n R13: 0000000000000000 R14: 00007f1282176080 R15: 00007ffcb9e23328\n </TASK>\n BTRFS error (device loop0 state A): Transaction aborted (error -12)\n BTRFS: error (device loop0 state A\n---truncated---"
}
]
},
"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": "52b1fdca23ac0fbcad363a1a5b426bf0d56b715a",
"version_value": "927b930f117bbae730a853c1dc43da8afe8380fa"
},
{
"version_value": "not down converted",
"x_cve_json_5_version_data": {
"versions": [
{
"version": "6.5",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.5",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.78",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.14",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.13.3",
"lessThanOrEqual": "6.13.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.14-rc2",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
],
"defaultStatus": "affected"
}
}
]
}
}
]
}
}
]
}
},
"references": {
"reference_data": [
{
"url": "https://git.kernel.org/stable/c/927b930f117bbae730a853c1dc43da8afe8380fa",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/927b930f117bbae730a853c1dc43da8afe8380fa"
},
{
"url": "https://git.kernel.org/stable/c/0ff88c2a742a7cbaa4d08507d864737d099b435a",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/0ff88c2a742a7cbaa4d08507d864737d099b435a"
},
{
"url": "https://git.kernel.org/stable/c/8ea8db4216d1029527ab4666f730650419451e32",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/8ea8db4216d1029527ab4666f730650419451e32"
},
{
"url": "https://git.kernel.org/stable/c/0d85f5c2dd91df6b5da454406756f463ba923b69",
"refsource": "MISC",
"name": "https://git.kernel.org/stable/c/0d85f5c2dd91df6b5da454406756f463ba923b69"
}
]
},
"generator": {
"engine": "bippy-5f407fcff5a0"
}
}
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