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| H A D | ext2_vfsops.c | diff 343517 Mon Jan 28 02:13:52 MST 2019 pfg MFC r343459: (parcial) ext2fs: Add some extra consistency checks for the superblock. Maliciously formed, or badly corrupted, filesystems can cause kernel panics. In general, such acts of foot-shooting can only be accomplished by root, but in a world with VM images that is moving towards automated mounts it is important to have some form of prevention. Reported by: Christopher Krah, Thomas Barabosch, and Jan-Niclas Hilgert of Fraunhofer FKIE. Incidentaly this should also fix a memory corruption issue reported by Dr Silvio Cesare of InfoSect. Huge thanks to all reseachers for making us aware of the issue. Note: for the MFC to stable/11 several changes had to made. admbug: 872, 891 Reviewed by: fsu Obtained from: NetBSD (with changes) |
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