ghsa-qq62-42pv-vwvh
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix warning in ext4_handle_inode_extension
We got issue as follows: EXT4-fs error (device loop0) in ext4_reserve_inode_write:5741: Out of memory EXT4-fs error (device loop0): ext4_setattr:5462: inode #13: comm syz-executor.0: mark_inode_dirty error EXT4-fs error (device loop0) in ext4_setattr:5519: Out of memory EXT4-fs error (device loop0): ext4_ind_map_blocks:595: inode #13: comm syz-executor.0: Can't allocate blocks for non-extent mapped inodes with bigalloc ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4361 at fs/ext4/file.c:301 ext4_file_write_iter+0x11c9/0x1220 Modules linked in: CPU: 1 PID: 4361 Comm: syz-executor.0 Not tainted 5.10.0+ #1 RIP: 0010:ext4_file_write_iter+0x11c9/0x1220 RSP: 0018:ffff924d80b27c00 EFLAGS: 00010282 RAX: ffffffff815a3379 RBX: 0000000000000000 RCX: 000000003b000000 RDX: ffff924d81601000 RSI: 00000000000009cc RDI: 00000000000009cd RBP: 000000000000000d R08: ffffffffbc5a2c6b R09: 0000902e0e52a96f R10: ffff902e2b7c1b40 R11: ffff902e2b7c1b40 R12: 000000000000000a R13: 0000000000000001 R14: ffff902e0e52aa10 R15: ffffffffffffff8b FS: 00007f81a7f65700(0000) GS:ffff902e3bc80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000012db88001 CR4: 00000000003706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_iter_readv_writev+0x2e5/0x360 do_iter_write+0x112/0x4c0 do_pwritev+0x1e5/0x390 __x64_sys_pwritev2+0x7e/0xa0 do_syscall_64+0x37/0x50 entry_SYSCALL_64_after_hwframe+0x44/0xa9
Above issue may happen as follows: Assume inode.i_size=4096 EXT4_I(inode)->i_disksize=4096
step 1: set inode->i_isize = 8192 ext4_setattr if (attr->ia_size != inode->i_size) EXT4_I(inode)->i_disksize = attr->ia_size; rc = ext4_mark_inode_dirty ext4_reserve_inode_write ext4_get_inode_loc __ext4_get_inode_loc sb_getblk --> return -ENOMEM ... if (!error) ->will not update i_size i_size_write(inode, attr->ia_size); Now: inode.i_size=4096 EXT4_I(inode)->i_disksize=8192
step 2: Direct write 4096 bytes ext4_file_write_iter ext4_dio_write_iter iomap_dio_rw ->return error if (extend) ext4_handle_inode_extension WARN_ON_ONCE(i_size_read(inode) < EXT4_I(inode)->i_disksize); ->Then trigger warning.
To solve above issue, if mark inode dirty failed in ext4_setattr just set 'EXT4_I(inode)->i_disksize' with old value.
{
"affected": [],
"aliases": [
"CVE-2022-49352"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-26T07:01:11Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix warning in ext4_handle_inode_extension\n\nWe got issue as follows:\nEXT4-fs error (device loop0) in ext4_reserve_inode_write:5741: Out of memory\nEXT4-fs error (device loop0): ext4_setattr:5462: inode #13: comm syz-executor.0: mark_inode_dirty error\nEXT4-fs error (device loop0) in ext4_setattr:5519: Out of memory\nEXT4-fs error (device loop0): ext4_ind_map_blocks:595: inode #13: comm syz-executor.0: Can\u0027t allocate blocks for non-extent mapped inodes with bigalloc\n------------[ cut here ]------------\nWARNING: CPU: 1 PID: 4361 at fs/ext4/file.c:301 ext4_file_write_iter+0x11c9/0x1220\nModules linked in:\nCPU: 1 PID: 4361 Comm: syz-executor.0 Not tainted 5.10.0+ #1\nRIP: 0010:ext4_file_write_iter+0x11c9/0x1220\nRSP: 0018:ffff924d80b27c00 EFLAGS: 00010282\nRAX: ffffffff815a3379 RBX: 0000000000000000 RCX: 000000003b000000\nRDX: ffff924d81601000 RSI: 00000000000009cc RDI: 00000000000009cd\nRBP: 000000000000000d R08: ffffffffbc5a2c6b R09: 0000902e0e52a96f\nR10: ffff902e2b7c1b40 R11: ffff902e2b7c1b40 R12: 000000000000000a\nR13: 0000000000000001 R14: ffff902e0e52aa10 R15: ffffffffffffff8b\nFS: 00007f81a7f65700(0000) GS:ffff902e3bc80000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffffffff600400 CR3: 000000012db88001 CR4: 00000000003706e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n do_iter_readv_writev+0x2e5/0x360\n do_iter_write+0x112/0x4c0\n do_pwritev+0x1e5/0x390\n __x64_sys_pwritev2+0x7e/0xa0\n do_syscall_64+0x37/0x50\n entry_SYSCALL_64_after_hwframe+0x44/0xa9\n\nAbove issue may happen as follows:\nAssume\ninode.i_size=4096\nEXT4_I(inode)-\u003ei_disksize=4096\n\nstep 1: set inode-\u003ei_isize = 8192\next4_setattr\n if (attr-\u003eia_size != inode-\u003ei_size)\n EXT4_I(inode)-\u003ei_disksize = attr-\u003eia_size;\n rc = ext4_mark_inode_dirty\n ext4_reserve_inode_write\n ext4_get_inode_loc\n __ext4_get_inode_loc\n sb_getblk --\u003e return -ENOMEM\n ...\n if (!error) -\u003ewill not update i_size\n i_size_write(inode, attr-\u003eia_size);\nNow:\ninode.i_size=4096\nEXT4_I(inode)-\u003ei_disksize=8192\n\nstep 2: Direct write 4096 bytes\next4_file_write_iter\n ext4_dio_write_iter\n iomap_dio_rw -\u003ereturn error\n if (extend)\n ext4_handle_inode_extension\n WARN_ON_ONCE(i_size_read(inode) \u003c EXT4_I(inode)-\u003ei_disksize);\n-\u003eThen trigger warning.\n\nTo solve above issue, if mark inode dirty failed in ext4_setattr just\nset \u0027EXT4_I(inode)-\u003ei_disksize\u0027 with old value.",
"id": "GHSA-qq62-42pv-vwvh",
"modified": "2025-06-19T15:30:30Z",
"published": "2025-06-19T15:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49352"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1bcce88da60eccc946c0f4ed942b0f08cd565778"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/adf490083ca52ebfb0b2fe64ff1ead00c0452dd7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b81d2ff6885e38fc745eeaf9565775055778fc0b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e383c2aa5f02ab571530dc5c5696479672478c25"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f4534c9fc94d22383f187b9409abb3f9df2e3db3"
}
],
"schema_version": "1.4.0",
"severity": []
}
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