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CVE-2024-47660 In the Linux kernel, the following vulnerability has been resolved: fsnotify: clear PARENT_WATCHED flags lazily In…

Description

In the Linux kernel, the following vulnerability has been resolved: fsnotify: clear PARENT_WATCHED flags lazily In some setups directories can have many (usually negative) dentries. Hence __fsnotify_update_child_dentry_flags() function can take a significant amount of time. Since the bulk of this function happens under inode->i_lock this causes a significant contention on the lock when we remove the watch from the directory as the __fsnotify_update_child_dentry_flags() call from fsnotify_recalc_mask() races with __fsnotify_update_child_dentry_flags() calls from __fsnotify_parent() happening on children. This can lead upto softlockup reports reported by users. Fix the problem by calling fsnotify_update_children_dentry_flags() to set PARENT_WATCHED flags only when parent starts watching children. When parent stops watching children, clear false positive PARENT_WATCHED flags lazily in __fsnotify_parent() for each accessed child.

Produits et versions touchés

Produit Versions touchées Corrigé en
Linux 6.11 premières → < 6.11 6.11
Linux 6.10 premières → < 6.10.9 6.10.9
Linux 6.6 premières → < 6.6.50 6.6.50
Linux 6.1 premières → < 6.1.109 6.1.109
Linux 5.15 premières → < 5.15.167 5.15.167
Linux 5.10 premières → < 5.10.226 5.10.226
Linux 2.6.38 Pas de correctif indiqué
RUGGEDCOM RST2428P 3.2 premières → < 3.2 3.2
SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family 3.2 premières → < 3.2 3.2
Afficher les 2 autres branches
Produit Versions touchées Corrigé en
SCALANCE XCM-/XRM-/XCH-/XRH-300 family 3.2 premières → < 3.2 3.2
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem 1.1 premières → < 1.1.1 1.1.1

Références

Chronologie

  1. Publiée
  2. Dernière modification

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