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2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
27 lines
849 B
C
27 lines
849 B
C
#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/grinternal.h>
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int
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gr_handle_fifo(const struct dentry *dentry, const struct vfsmount *mnt,
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const struct dentry *dir, const int flag, const int acc_mode)
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{
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#ifdef CONFIG_GRKERNSEC_FIFO
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const struct cred *cred = current_cred();
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struct inode *inode = d_backing_inode(dentry);
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struct inode *dir_inode = d_backing_inode(dir);
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if (grsec_enable_fifo && S_ISFIFO(inode->i_mode) &&
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!(flag & O_EXCL) && (dir_inode->i_mode & S_ISVTX) &&
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!uid_eq(inode->i_uid, dir_inode->i_uid) &&
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!uid_eq(cred->fsuid, inode->i_uid)) {
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if (!inode_permission(inode, acc_mode))
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gr_log_fs_int2(GR_DONT_AUDIT, GR_FIFO_MSG, dentry, mnt, GR_GLOBAL_UID(inode->i_uid), GR_GLOBAL_GID(inode->i_gid));
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return -EACCES;
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}
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#endif
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return 0;
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}
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