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* jfs: Avoid field-overflowing memcpy()Kees Cook2021-06-231-4/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation for FORTIFY_SOURCE performing compile-time and run-time field array bounds checking for memcpy(), memmove(), and memset(), avoid intentionally writing across neighboring fields. Introduce more unions to cover the full inline data section, so that the entire 256 bytes can be addressed by memcpy() without thinking it is crossing field boundaries. Additionally adjusts dir memcpy() to use existing union names to get the same coverage. diffoscope shows there are no binary differences before/after excepting the name of the initcall, which is line number based: $ diffoscope --exclude-directory-metadata yes before/fs after/fs --- before/fs +++ after/fs │ --- before/fs/jfs ├── +++ after/fs/jfs │ │ --- before/fs/jfs/super.o │ ├── +++ after/fs/jfs/super.o │ │ ├── readelf --wide --symbols {} │ │ │ @@ -2,15 +2,15 @@ │ │ │ Symbol table '.symtab' contains 158 entries: │ │ │ Num: Value Size Type Bind Vis Ndx Name ... │ │ │ - 5: 0000000000000000 0 NOTYPE LOCAL DEFAULT 6 __initcall__kmod_jfs__319_1049_ini t_jfs_fs6 │ │ │ + 5: 0000000000000000 0 NOTYPE LOCAL DEFAULT 6 __initcall__kmod_jfs__319_1050_ini t_jfs_fs6 ... Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
* jfs: convert to fileattrMiklos Szeredi2021-04-121-7/+0
| | | | | | | | Use the fileattr API to let the VFS handle locking, permission checking and conversion. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Cc: Dave Kleikamp <shaggy@kernel.org>
* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156Thomas Gleixner2019-05-301-14/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* jfs: Fix usercopy whitelist for inline inode dataKees Cook2018-08-041-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | Bart Massey reported what turned out to be a usercopy whitelist false positive in JFS when symlink contents exceeded 128 bytes. The inline inode data (i_inline) is actually designed to overflow into the "extended area" following it (i_inline_ea) when needed. So the whitelist needed to be expanded to include both i_inline and i_inline_ea (the whole size of which is calculated internally using IDATASIZE, 256, instead of sizeof(i_inline), 128). $ cd /mnt/jfs $ touch $(perl -e 'print "B" x 250') $ ln -s B* b $ ls -l >/dev/null [ 249.436410] Bad or missing usercopy whitelist? Kernel memory exposure attempt detected from SLUB object 'jfs_ip' (offset 616, size 250)! Reported-by: Bart Massey <bart.massey@gmail.com> Fixes: 8d2704d382a9 ("jfs: Define usercopy region in jfs_ip slab cache") Cc: Dave Kleikamp <shaggy@kernel.org> Cc: jfs-discussion@lists.sourceforge.net Cc: stable@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org>
* BKL-removal: Implement a compat_ioctl handler for JFSAndi Kleen2008-02-071-0/+2
| | | | | | | | The ioctls were already compatible except for the actual values so this was fairly easy to do. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
* JFS: Whitespace cleanup and remove some dead codeDave Kleikamp2007-06-061-21/+21
| | | | Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
* JFS: White space cleanupDave Kleikamp2006-10-021-4/+4
| | | | | | | | Removed trailing spaces & tabs, and spaces preceding tabs. Also a couple very minor comment cleanups. Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com> (cherry picked from f74156539964d7b3d5164fdf8848e6a682f75b97 commit)
* JFS: ext2 inode attributes for jfsHerbert Poetzl2006-02-091-4/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ext2 inode attributes with relevance for jfs: 'a' EXT2_APPEND_FL -> append only 'i' EXT2_IMMUTABLE_FL -> immutable file 's' EXT2_SECRM_FL -> zero file 'u' EXT2_UNRM_FL -> allow for unrm 'A' EXT2_NOATIME_FL -> no access time 'D' EXT2_DIRSYNC_FL -> dirsync 'S' EXT2_SYNC_FL -> sync overview of jfs flags (partially for OS/2) value (OS/2) Linux ext2 attrs ------------------------------------------------ 0x00010000 IFJOURNAL - 0x00020000 ISPARSE used 0x00040000 INLINEEA used 0x00080000 - - JFS_NOATIME_FL 0x00100000 - - JFS_DIRSYNC_FL 0x00200000 - - JFS_SYNC_FL 0x00400000 - - JFS_SECRM_FL 0x00800000 ISWAPFILE - JFS_UNRM_FL 0x01000000 - - JFS_APPEND_FL 0x02000000 IREADONLY - JFS_IMMUTABLE_FL 0x04000000 IHIDDEN - - 0x08000000 ISYSTEM - - 0x10000000 - - 0x20000000 IDIRECTORY used 0x40000000 IARCHIVE - 0x80000000 INEWNAME - the implementation is straight forward, except for the fact that the attributes have to be mapped to match with the ext2 ones to avoid a separate tool for manipulating them (this could be avoided when using a separate flag field in the on-disk representation, but the overhead is minimal) a special jfs_ioctl is added to allow for the new JFS_IOC_GETFLAGS and JFS_IOC_SETFLAGS calls. a helper function jfs_set_inode_flags() to transfer the flags from the on-disk version to the inode minor changes to allow flag inheritance on inode creation, as well as a cleanup of the on-disk flags (including the new ones) beforementioned helper to map between ext2 and jfs versions of the new flags ... the JFS_SECRM_FL and JFS_UNRM_FL are not done yet and I'm not 100% sure they are worth the effort, the rest seems to work out of the box ... Signed-off-by: Herbert Poetzl <herbert@13thfloor.at> Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-161-0/+151
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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