From d17a360d9f1c607d7f893e80f7afeb6e81eec8dc Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Sat, 17 Oct 2015 16:15:18 -0400 Subject: [PATCH] ext4: reserve code points for the project quota feature Signed-off-by: Theodore Ts'o (cherry picked from commit 8b4953e13f4c5d9a3c869f5fca7d51e1700e7db0) Orabug: 25802481 CVE-2016-10208 Signed-off-by: Kirtikar Kashyap Reviewed-by: Jack Vogel --- fs/ext4/ext4.h | 8 +++++++- include/uapi/linux/fs.h | 1 + 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 74973f7a16b4..23b6523a705a 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -378,6 +378,7 @@ struct flex_groups { #define EXT4_EA_INODE_FL 0x00200000 /* Inode used for large EA */ #define EXT4_EOFBLOCKS_FL 0x00400000 /* Blocks allocated beyond EOF */ #define EXT4_INLINE_DATA_FL 0x10000000 /* Inode has inline data. */ +#define EXT4_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ #define EXT4_RESERVED_FL 0x80000000 /* reserved for ext4 lib */ #define EXT4_FL_USER_VISIBLE 0x004BDFFF /* User visible flags */ @@ -435,6 +436,7 @@ enum { EXT4_INODE_EA_INODE = 21, /* Inode used for large EA */ EXT4_INODE_EOFBLOCKS = 22, /* Blocks allocated beyond EOF */ EXT4_INODE_INLINE_DATA = 28, /* Data in inode. */ + EXT4_INODE_PROJINHERIT = 29, /* Create with parents projid */ EXT4_INODE_RESERVED = 31, /* reserved for ext4 lib */ }; @@ -479,6 +481,7 @@ static inline void ext4_check_flag_values(void) CHECK_FLAG_VALUE(EA_INODE); CHECK_FLAG_VALUE(EOFBLOCKS); CHECK_FLAG_VALUE(INLINE_DATA); + CHECK_FLAG_VALUE(PROJINHERIT); CHECK_FLAG_VALUE(RESERVED); } @@ -696,6 +699,7 @@ struct ext4_inode { __le32 i_crtime; /* File Creation time */ __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */ __le32 i_version_hi; /* high 32 bits for 64-bit version */ + __le32 i_projid; /* Project ID */ }; struct move_extent { @@ -1216,7 +1220,8 @@ struct ext4_super_block { __u8 s_encrypt_algos[4]; /* Encryption algorithms in use */ __u8 s_encrypt_pw_salt[16]; /* Salt used for string2key algorithm */ __le32 s_lpf_ino; /* Location of the lost+found inode */ - __le32 s_reserved[100]; /* Padding to the end of the block */ + __le32 s_prj_quota_inum; /* inode for tracking project quota */ + __le32 s_reserved[99]; /* Padding to the end of the block */ __le32 s_checksum; /* crc32c(superblock) */ }; @@ -1601,6 +1606,7 @@ static inline int ext4_encrypted_inode(struct inode *inode) */ #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400 #define EXT4_FEATURE_RO_COMPAT_READONLY 0x1000 +#define EXT4_FEATURE_RO_COMPAT_PROJECT 0x2000 #define EXT4_FEATURE_INCOMPAT_COMPRESSION 0x0001 #define EXT4_FEATURE_INCOMPAT_FILETYPE 0x0002 diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index 9b964a5920af..f15d980249b5 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -197,6 +197,7 @@ struct inodes_stat_t { #define FS_EXTENT_FL 0x00080000 /* Extents */ #define FS_DIRECTIO_FL 0x00100000 /* Use direct i/o */ #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ +#define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */ #define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ #define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ -- 2.50.1