Messages in this thread Patch in this message |  | | Date | Tue, 09 Jan 2001 21:40:46 -0500 | From | Chris Mason <> | Subject | Re: [reiserfs-list] major security bug in reiserfs (may affect SuSE Linux) |
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On Wednesday, January 10, 2001 02:32:09 AM +0100 Marc Lehmann <pcg@goof.com> wrote: >>> EIP; c013f911 <filldir+20b/221> <===== > Trace; c013f706 <filldir+0/221> > Trace; c0136e01 <reiserfs_getblk+2a/16d> >
Here is a patch against our 2.4 code (3.6.25) that does the same as the patch posted for 3.5.29:
-chris
--- linux/include/linux/reiserfs_fs.h.1 Tue Jan 9 21:22:27 2001 +++ linux/include/linux/reiserfs_fs.h Tue Jan 9 21:22:55 2001 @@ -926,8 +926,7 @@ //((block_size - BLKH_SIZE - IH_SIZE - DEH_SIZE * 2) / 2) // two entries per block (at least) -#define REISERFS_MAX_NAME_LEN(block_size) \ -((block_size - BLKH_SIZE - IH_SIZE - DEH_SIZE)) +#define REISERFS_MAX_NAME_LEN(block_size) 255 --- linux/fs/reiserfs/dir.c.1 Tue Jan 9 21:22:19 2001 +++ linux/fs/reiserfs/dir.c Tue Jan 9 21:21:02 2001 @@ -142,6 +142,10 @@ if (!d_name[d_reclen - 1]) d_reclen = strlen (d_name); + if (d_reclen > REISERFS_MAX_NAME_LEN(inode->i_sb->s_blocksize)){ + /* too big to send back to VFS */ + continue ; + } d_off = deh_offset (deh); filp->f_pos = d_off ; d_ino = deh_objectid (deh);
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