[Forgot Password]
Login  Register Subscribe

30481

 
 

423868

 
 

255116

 
 

909

 
 

198683

 
 

282

Paid content will be excluded from the download.


Download | Alert*
CVE
view JSON

CVE-2023-52848Date: (C)2024-05-22   (M)2024-06-07


In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to drop meta_inode's page cache in f2fs_put_super() syzbot reports a kernel bug as below: F2FS-fs (loop1): detect filesystem reference count leak during umount, type: 10, count: 1 kernel BUG at fs/f2fs/super.c:1639! CPU: 0 PID: 15451 Comm: syz-executor.1 Not tainted 6.5.0-syzkaller-09338-ge0152e7481c6 #0 RIP: 0010:f2fs_put_super+0xce1/0xed0 fs/f2fs/super.c:1639 Call Trace: generic_shutdown_super+0x161/0x3c0 fs/super.c:693 kill_block_super+0x3b/0x70 fs/super.c:1646 kill_f2fs_super+0x2b7/0x3d0 fs/f2fs/super.c:4879 deactivate_locked_super+0x9a/0x170 fs/super.c:481 deactivate_super+0xde/0x100 fs/super.c:514 cleanup_mnt+0x222/0x3d0 fs/namespace.c:1254 task_work_run+0x14d/0x240 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd In f2fs_put_super(), it tries to do sanity check on dirty and IO reference count of f2fs, once there is any reference count leak, it will trigger panic. The root case is, during f2fs_put_super(), if there is any IO error in f2fs_wait_on_all_pages(), we missed to truncate meta_inode's page cache later, result in panic, fix this case.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 5.5CVSS Score :
Exploit Score: Exploit Score:
Impact Score: Impact Score:
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: Access Vector:
Attack Complexity: Access Complexity:
Privileges Required: Authentication:
User Interaction: Confidentiality:
Scope: Integrity:
Confidentiality: Availability:
Integrity:  
Availability:  
  
Reference:
https://git.kernel.org/stable/c/10b2a6c0dade67b5a2b2d17fb75c457ea1985fad
https://git.kernel.org/stable/c/a4639380bbe66172df329f8b54aa7d2e943f0f64
https://git.kernel.org/stable/c/eb42e1862aa7934c2c21890097ce4993c5e0d192

© SecPod Technologies