mirror of https://gitee.com/openkylin/linux.git
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro:
"Fix for my braino in replace_fd(), dhowell's fix for the fallout from
over-enthusiastic bo^Wdeclaration movements plus crapectomy that
should've happened a long time ago (SEL_... definitions)."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
bury SEL_{IN,OUT,EX}
Unexport some bits of linux/fs.h
fix a leak in replace_fd() users
This commit is contained in:
Linus Torvalds
commit
ecb2ecd9c2
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@ -450,11 +450,12 @@ static int umh_pipe_setup(struct subprocess_info *info, struct cred *new)
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cp->file = files[1];
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replace_fd(0, files[0], 0);
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err = replace_fd(0, files[0], 0);
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fput(files[0]);
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/* and disallow core files too */
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current->signal->rlim[RLIMIT_CORE] = (struct rlimit){1, 1};
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return 0;
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return err;
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}
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void do_coredump(siginfo_t *siginfo, struct pt_regs *regs)
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@ -64,6 +64,73 @@ typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
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ssize_t bytes, void *private, int ret,
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bool is_async);
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#define MAY_EXEC 0x00000001
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#define MAY_WRITE 0x00000002
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#define MAY_READ 0x00000004
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#define MAY_APPEND 0x00000008
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#define MAY_ACCESS 0x00000010
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#define MAY_OPEN 0x00000020
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#define MAY_CHDIR 0x00000040
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/* called from RCU mode, don't block */
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#define MAY_NOT_BLOCK 0x00000080
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/*
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* flags in file.f_mode. Note that FMODE_READ and FMODE_WRITE must correspond
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* to O_WRONLY and O_RDWR via the strange trick in __dentry_open()
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*/
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/* file is open for reading */
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#define FMODE_READ ((__force fmode_t)0x1)
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/* file is open for writing */
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#define FMODE_WRITE ((__force fmode_t)0x2)
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/* file is seekable */
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#define FMODE_LSEEK ((__force fmode_t)0x4)
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/* file can be accessed using pread */
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#define FMODE_PREAD ((__force fmode_t)0x8)
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/* file can be accessed using pwrite */
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#define FMODE_PWRITE ((__force fmode_t)0x10)
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/* File is opened for execution with sys_execve / sys_uselib */
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#define FMODE_EXEC ((__force fmode_t)0x20)
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/* File is opened with O_NDELAY (only set for block devices) */
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#define FMODE_NDELAY ((__force fmode_t)0x40)
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/* File is opened with O_EXCL (only set for block devices) */
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#define FMODE_EXCL ((__force fmode_t)0x80)
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/* File is opened using open(.., 3, ..) and is writeable only for ioctls
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(specialy hack for floppy.c) */
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#define FMODE_WRITE_IOCTL ((__force fmode_t)0x100)
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/* 32bit hashes as llseek() offset (for directories) */
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#define FMODE_32BITHASH ((__force fmode_t)0x200)
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/* 64bit hashes as llseek() offset (for directories) */
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#define FMODE_64BITHASH ((__force fmode_t)0x400)
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/*
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* Don't update ctime and mtime.
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*
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* Currently a special hack for the XFS open_by_handle ioctl, but we'll
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* hopefully graduate it to a proper O_CMTIME flag supported by open(2) soon.
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*/
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#define FMODE_NOCMTIME ((__force fmode_t)0x800)
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/* Expect random access pattern */
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#define FMODE_RANDOM ((__force fmode_t)0x1000)
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/* File is huge (eg. /dev/kmem): treat loff_t as unsigned */
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#define FMODE_UNSIGNED_OFFSET ((__force fmode_t)0x2000)
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/* File is opened with O_PATH; almost nothing can be done with it */
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#define FMODE_PATH ((__force fmode_t)0x4000)
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/* File was opened by fanotify and shouldn't generate fanotify events */
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#define FMODE_NONOTIFY ((__force fmode_t)0x1000000)
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/*
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* Flag for rw_copy_check_uvector and compat_rw_copy_check_uvector
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* that indicates that they should check the contents of the iovec are
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* valid, but not check the memory that the iovec elements
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* points too.
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*/
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#define CHECK_IOVEC_ONLY -1
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/*
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* The below are the various read and write types that we support. Some of
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* them include behavioral modifiers that send information down to the
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@ -1556,6 +1623,60 @@ struct super_operations {
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void (*free_cached_objects)(struct super_block *, int);
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};
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/*
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* Inode flags - they have no relation to superblock flags now
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*/
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#define S_SYNC 1 /* Writes are synced at once */
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#define S_NOATIME 2 /* Do not update access times */
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#define S_APPEND 4 /* Append-only file */
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#define S_IMMUTABLE 8 /* Immutable file */
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#define S_DEAD 16 /* removed, but still open directory */
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#define S_NOQUOTA 32 /* Inode is not counted to quota */
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#define S_DIRSYNC 64 /* Directory modifications are synchronous */
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#define S_NOCMTIME 128 /* Do not update file c/mtime */
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#define S_SWAPFILE 256 /* Do not truncate: swapon got its bmaps */
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#define S_PRIVATE 512 /* Inode is fs-internal */
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#define S_IMA 1024 /* Inode has an associated IMA struct */
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#define S_AUTOMOUNT 2048 /* Automount/referral quasi-directory */
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#define S_NOSEC 4096 /* no suid or xattr security attributes */
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/*
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* Note that nosuid etc flags are inode-specific: setting some file-system
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* flags just means all the inodes inherit those flags by default. It might be
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* possible to override it selectively if you really wanted to with some
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* ioctl() that is not currently implemented.
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*
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* Exception: MS_RDONLY is always applied to the entire file system.
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*
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* Unfortunately, it is possible to change a filesystems flags with it mounted
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* with files in use. This means that all of the inodes will not have their
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* i_flags updated. Hence, i_flags no longer inherit the superblock mount
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* flags, so these have to be checked separately. -- rmk@arm.uk.linux.org
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*/
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#define __IS_FLG(inode, flg) ((inode)->i_sb->s_flags & (flg))
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#define IS_RDONLY(inode) ((inode)->i_sb->s_flags & MS_RDONLY)
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#define IS_SYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS) || \
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((inode)->i_flags & S_SYNC))
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#define IS_DIRSYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS|MS_DIRSYNC) || \
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((inode)->i_flags & (S_SYNC|S_DIRSYNC)))
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#define IS_MANDLOCK(inode) __IS_FLG(inode, MS_MANDLOCK)
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#define IS_NOATIME(inode) __IS_FLG(inode, MS_RDONLY|MS_NOATIME)
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#define IS_I_VERSION(inode) __IS_FLG(inode, MS_I_VERSION)
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#define IS_NOQUOTA(inode) ((inode)->i_flags & S_NOQUOTA)
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#define IS_APPEND(inode) ((inode)->i_flags & S_APPEND)
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#define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)
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#define IS_POSIXACL(inode) __IS_FLG(inode, MS_POSIXACL)
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#define IS_DEADDIR(inode) ((inode)->i_flags & S_DEAD)
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#define IS_NOCMTIME(inode) ((inode)->i_flags & S_NOCMTIME)
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#define IS_SWAPFILE(inode) ((inode)->i_flags & S_SWAPFILE)
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#define IS_PRIVATE(inode) ((inode)->i_flags & S_PRIVATE)
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#define IS_IMA(inode) ((inode)->i_flags & S_IMA)
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#define IS_AUTOMOUNT(inode) ((inode)->i_flags & S_AUTOMOUNT)
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#define IS_NOSEC(inode) ((inode)->i_flags & S_NOSEC)
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/*
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* Inode state bits. Protected by inode->i_lock
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*
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@ -1688,6 +1809,11 @@ int sync_inode_metadata(struct inode *inode, int wait);
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struct file_system_type {
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const char *name;
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int fs_flags;
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#define FS_REQUIRES_DEV 1
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#define FS_BINARY_MOUNTDATA 2
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#define FS_HAS_SUBTYPE 4
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#define FS_REVAL_DOT 16384 /* Check the paths ".", ".." for staleness */
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#define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move() during rename() internally. */
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struct dentry *(*mount) (struct file_system_type *, int,
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const char *, void *);
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void (*kill_sb) (struct super_block *);
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@ -57,85 +57,6 @@ struct inodes_stat_t {
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#define NR_FILE 8192 /* this can well be larger on a larger system */
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#define MAY_EXEC 0x00000001
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#define MAY_WRITE 0x00000002
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#define MAY_READ 0x00000004
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#define MAY_APPEND 0x00000008
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#define MAY_ACCESS 0x00000010
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#define MAY_OPEN 0x00000020
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#define MAY_CHDIR 0x00000040
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/* called from RCU mode, don't block */
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#define MAY_NOT_BLOCK 0x00000080
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/*
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* flags in file.f_mode. Note that FMODE_READ and FMODE_WRITE must correspond
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* to O_WRONLY and O_RDWR via the strange trick in __dentry_open()
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*/
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/* file is open for reading */
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#define FMODE_READ ((__force fmode_t)0x1)
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/* file is open for writing */
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#define FMODE_WRITE ((__force fmode_t)0x2)
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/* file is seekable */
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#define FMODE_LSEEK ((__force fmode_t)0x4)
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/* file can be accessed using pread */
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#define FMODE_PREAD ((__force fmode_t)0x8)
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/* file can be accessed using pwrite */
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#define FMODE_PWRITE ((__force fmode_t)0x10)
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/* File is opened for execution with sys_execve / sys_uselib */
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#define FMODE_EXEC ((__force fmode_t)0x20)
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/* File is opened with O_NDELAY (only set for block devices) */
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#define FMODE_NDELAY ((__force fmode_t)0x40)
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/* File is opened with O_EXCL (only set for block devices) */
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#define FMODE_EXCL ((__force fmode_t)0x80)
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/* File is opened using open(.., 3, ..) and is writeable only for ioctls
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(specialy hack for floppy.c) */
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#define FMODE_WRITE_IOCTL ((__force fmode_t)0x100)
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/* 32bit hashes as llseek() offset (for directories) */
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#define FMODE_32BITHASH ((__force fmode_t)0x200)
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/* 64bit hashes as llseek() offset (for directories) */
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#define FMODE_64BITHASH ((__force fmode_t)0x400)
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/*
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* Don't update ctime and mtime.
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*
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* Currently a special hack for the XFS open_by_handle ioctl, but we'll
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* hopefully graduate it to a proper O_CMTIME flag supported by open(2) soon.
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*/
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#define FMODE_NOCMTIME ((__force fmode_t)0x800)
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/* Expect random access pattern */
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#define FMODE_RANDOM ((__force fmode_t)0x1000)
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/* File is huge (eg. /dev/kmem): treat loff_t as unsigned */
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#define FMODE_UNSIGNED_OFFSET ((__force fmode_t)0x2000)
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/* File is opened with O_PATH; almost nothing can be done with it */
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#define FMODE_PATH ((__force fmode_t)0x4000)
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/* File was opened by fanotify and shouldn't generate fanotify events */
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#define FMODE_NONOTIFY ((__force fmode_t)0x1000000)
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/*
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* Flag for rw_copy_check_uvector and compat_rw_copy_check_uvector
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* that indicates that they should check the contents of the iovec are
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* valid, but not check the memory that the iovec elements
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* points too.
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*/
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#define CHECK_IOVEC_ONLY -1
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#define SEL_IN 1
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#define SEL_OUT 2
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#define SEL_EX 4
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/* public flags for file_system_type */
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#define FS_REQUIRES_DEV 1
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#define FS_BINARY_MOUNTDATA 2
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#define FS_HAS_SUBTYPE 4
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#define FS_REVAL_DOT 16384 /* Check the paths ".", ".." for staleness */
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#define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move()
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* during rename() internally.
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*/
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/*
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* These are the fs-independent mount-flags: up to 32 flags are supported
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@ -181,59 +102,6 @@ struct inodes_stat_t {
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#define MS_MGC_VAL 0xC0ED0000
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#define MS_MGC_MSK 0xffff0000
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/* Inode flags - they have nothing to superblock flags now */
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#define S_SYNC 1 /* Writes are synced at once */
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#define S_NOATIME 2 /* Do not update access times */
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#define S_APPEND 4 /* Append-only file */
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#define S_IMMUTABLE 8 /* Immutable file */
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#define S_DEAD 16 /* removed, but still open directory */
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#define S_NOQUOTA 32 /* Inode is not counted to quota */
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#define S_DIRSYNC 64 /* Directory modifications are synchronous */
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#define S_NOCMTIME 128 /* Do not update file c/mtime */
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#define S_SWAPFILE 256 /* Do not truncate: swapon got its bmaps */
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#define S_PRIVATE 512 /* Inode is fs-internal */
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#define S_IMA 1024 /* Inode has an associated IMA struct */
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#define S_AUTOMOUNT 2048 /* Automount/referral quasi-directory */
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#define S_NOSEC 4096 /* no suid or xattr security attributes */
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|
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/*
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* Note that nosuid etc flags are inode-specific: setting some file-system
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* flags just means all the inodes inherit those flags by default. It might be
|
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* possible to override it selectively if you really wanted to with some
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* ioctl() that is not currently implemented.
|
||||
*
|
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* Exception: MS_RDONLY is always applied to the entire file system.
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*
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* Unfortunately, it is possible to change a filesystems flags with it mounted
|
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* with files in use. This means that all of the inodes will not have their
|
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* i_flags updated. Hence, i_flags no longer inherit the superblock mount
|
||||
* flags, so these have to be checked separately. -- rmk@arm.uk.linux.org
|
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*/
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#define __IS_FLG(inode,flg) ((inode)->i_sb->s_flags & (flg))
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#define IS_RDONLY(inode) ((inode)->i_sb->s_flags & MS_RDONLY)
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#define IS_SYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS) || \
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((inode)->i_flags & S_SYNC))
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#define IS_DIRSYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS|MS_DIRSYNC) || \
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((inode)->i_flags & (S_SYNC|S_DIRSYNC)))
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#define IS_MANDLOCK(inode) __IS_FLG(inode, MS_MANDLOCK)
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#define IS_NOATIME(inode) __IS_FLG(inode, MS_RDONLY|MS_NOATIME)
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#define IS_I_VERSION(inode) __IS_FLG(inode, MS_I_VERSION)
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#define IS_NOQUOTA(inode) ((inode)->i_flags & S_NOQUOTA)
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#define IS_APPEND(inode) ((inode)->i_flags & S_APPEND)
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#define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)
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#define IS_POSIXACL(inode) __IS_FLG(inode, MS_POSIXACL)
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#define IS_DEADDIR(inode) ((inode)->i_flags & S_DEAD)
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#define IS_NOCMTIME(inode) ((inode)->i_flags & S_NOCMTIME)
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#define IS_SWAPFILE(inode) ((inode)->i_flags & S_SWAPFILE)
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#define IS_PRIVATE(inode) ((inode)->i_flags & S_PRIVATE)
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#define IS_IMA(inode) ((inode)->i_flags & S_IMA)
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#define IS_AUTOMOUNT(inode) ((inode)->i_flags & S_AUTOMOUNT)
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#define IS_NOSEC(inode) ((inode)->i_flags & S_NOSEC)
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||||
/* the read-only stuff doesn't really belong here, but any other place is
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||||
probably as bad and I don't want to create yet another include file. */
|
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||||
|
|
|
|||
|
|
@ -2132,18 +2132,14 @@ static inline void flush_unauthorized_files(const struct cred *cred,
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|||
return;
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||||
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||||
devnull = dentry_open(&selinux_null, O_RDWR, cred);
|
||||
if (!IS_ERR(devnull)) {
|
||||
/* replace all the matching ones with this */
|
||||
do {
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||||
replace_fd(n - 1, get_file(devnull), 0);
|
||||
} while ((n = iterate_fd(files, n, match_file, cred)) != 0);
|
||||
if (IS_ERR(devnull))
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||||
devnull = NULL;
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||||
/* replace all the matching ones with this */
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||||
do {
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||||
replace_fd(n - 1, devnull, 0);
|
||||
} while ((n = iterate_fd(files, n, match_file, cred)) != 0);
|
||||
if (devnull)
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||||
fput(devnull);
|
||||
} else {
|
||||
/* just close all the matching ones */
|
||||
do {
|
||||
replace_fd(n - 1, NULL, 0);
|
||||
} while ((n = iterate_fd(files, n, match_file, cred)) != 0);
|
||||
}
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||||
}
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||||
|
||||
/*
|
||||
|
|
|
|||
Loading…
Reference in New Issue