ghsa-q637-fwgw-hj6c
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to don't dirty inode for readonly filesystem
syzbot reports f2fs bug as below:
kernel BUG at fs/f2fs/inode.c:933! RIP: 0010:f2fs_evict_inode+0x1576/0x1590 fs/f2fs/inode.c:933 Call Trace: evict+0x2a4/0x620 fs/inode.c:664 dispose_list fs/inode.c:697 [inline] evict_inodes+0x5f8/0x690 fs/inode.c:747 generic_shutdown_super+0x9d/0x2c0 fs/super.c:675 kill_block_super+0x44/0x90 fs/super.c:1667 kill_f2fs_super+0x303/0x3b0 fs/f2fs/super.c:4894 deactivate_locked_super+0xc1/0x130 fs/super.c:484 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1256 task_work_run+0x24a/0x300 kernel/task_work.c:180 ptrace_notify+0x2cd/0x380 kernel/signal.c:2399 ptrace_report_syscall include/linux/ptrace.h:411 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:473 [inline] syscall_exit_work kernel/entry/common.c:251 [inline] syscall_exit_to_user_mode_prepare kernel/entry/common.c:278 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x15c/0x280 kernel/entry/common.c:296 do_syscall_64+0x50/0x110 arch/x86/entry/common.c:88 entry_SYSCALL_64_after_hwframe+0x63/0x6b
The root cause is: - do_sys_open - f2fs_lookup - __f2fs_find_entry - f2fs_i_depth_write - f2fs_mark_inode_dirty_sync - f2fs_dirty_inode - set_inode_flag(inode, FI_DIRTY_INODE)
- umount
- kill_f2fs_super
- kill_block_super
- generic_shutdown_super
- sync_filesystem : sb is readonly, skip sync_filesystem()
- evict_inodes
- iput
- f2fs_evict_inode
- f2fs_bug_on(sbi, is_inode_flag_set(inode, FI_DIRTY_INODE)) : trigger kernel panic
When we try to repair i_current_depth in readonly filesystem, let's skip dirty inode to avoid panic in later f2fs_evict_inode().
{
"affected": [],
"aliases": [
"CVE-2024-42297"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-08-17T09:15:10Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to don\u0027t dirty inode for readonly filesystem\n\nsyzbot reports f2fs bug as below:\n\nkernel BUG at fs/f2fs/inode.c:933!\nRIP: 0010:f2fs_evict_inode+0x1576/0x1590 fs/f2fs/inode.c:933\nCall Trace:\n evict+0x2a4/0x620 fs/inode.c:664\n dispose_list fs/inode.c:697 [inline]\n evict_inodes+0x5f8/0x690 fs/inode.c:747\n generic_shutdown_super+0x9d/0x2c0 fs/super.c:675\n kill_block_super+0x44/0x90 fs/super.c:1667\n kill_f2fs_super+0x303/0x3b0 fs/f2fs/super.c:4894\n deactivate_locked_super+0xc1/0x130 fs/super.c:484\n cleanup_mnt+0x426/0x4c0 fs/namespace.c:1256\n task_work_run+0x24a/0x300 kernel/task_work.c:180\n ptrace_notify+0x2cd/0x380 kernel/signal.c:2399\n ptrace_report_syscall include/linux/ptrace.h:411 [inline]\n ptrace_report_syscall_exit include/linux/ptrace.h:473 [inline]\n syscall_exit_work kernel/entry/common.c:251 [inline]\n syscall_exit_to_user_mode_prepare kernel/entry/common.c:278 [inline]\n __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]\n syscall_exit_to_user_mode+0x15c/0x280 kernel/entry/common.c:296\n do_syscall_64+0x50/0x110 arch/x86/entry/common.c:88\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nThe root cause is:\n- do_sys_open\n - f2fs_lookup\n - __f2fs_find_entry\n - f2fs_i_depth_write\n - f2fs_mark_inode_dirty_sync\n - f2fs_dirty_inode\n - set_inode_flag(inode, FI_DIRTY_INODE)\n\n- umount\n - kill_f2fs_super\n - kill_block_super\n - generic_shutdown_super\n - sync_filesystem\n : sb is readonly, skip sync_filesystem()\n - evict_inodes\n - iput\n - f2fs_evict_inode\n - f2fs_bug_on(sbi, is_inode_flag_set(inode, FI_DIRTY_INODE))\n : trigger kernel panic\n\nWhen we try to repair i_current_depth in readonly filesystem, let\u0027s\nskip dirty inode to avoid panic in later f2fs_evict_inode().",
"id": "GHSA-q637-fwgw-hj6c",
"modified": "2024-09-30T15:30:43Z",
"published": "2024-08-17T09:30:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42297"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/192b8fb8d1c8ca3c87366ebbef599fa80bb626b8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2434344559f6743efb3ac15d11af9a0db9543bd3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2d2916516577f2239b3377d9e8d12da5e6ccdfcf"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/54162974aea37a8cae00742470a78c7f6bd6f915"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/54bc4e88447e385c4d4ffa85d93e0dce628fcfa6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9ce8135accf103f7333af472709125878704fdd4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e62ff092a42f4a1bae3b310cf46673b4f3aac3b5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ec56571b4b146a1cfbedab49d5fcaf19fe8bf4f1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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