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2019-04-17udf: fix an uninitialized read bug and remove dead codeWenwen Wang1-15/+0
In udf_lookup(), the pointer 'fi' is a local variable initialized by the return value of the function call udf_find_entry(). However, if the macro 'UDF_RECOVERY' is defined, this variable will become uninitialized if the else branch is not taken, which can potentially cause incorrect results in the following execution. To fix this issue, this patch drops the whole code in the ifdef 'UDF_RECOVERY' region, as it is dead code. Signed-off-by: Wenwen Wang <wang6495@umn.edu> Signed-off-by: Jan Kara <jack@suse.cz>
2018-08-13Merge branch 'work.mkdir' of ↵Linus Torvalds1-8/+4
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs icache updates from Al Viro: - NFS mkdir/open_by_handle race fix - analogous solution for FUSE, replacing the one currently in mainline - new primitive to be used when discarding halfway set up inodes on failed object creation; gives sane warranties re icache lookups not returning such doomed by still not freed inodes. A bunch of filesystems switched to that animal. - Miklos' fix for last cycle regression in iget5_locked(); -stable will need a slightly different variant, unfortunately. - misc bits and pieces around things icache-related (in adfs and jfs). * 'work.mkdir' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: jfs: don't bother with make_bad_inode() in ialloc() adfs: don't put inodes into icache new helper: inode_fake_hash() vfs: don't evict uninitialized inode jfs: switch to discard_new_inode() ext2: make sure that partially set up inodes won't be returned by ext2_iget() udf: switch to discard_new_inode() ufs: switch to discard_new_inode() btrfs: switch to discard_new_inode() new primitive: discard_new_inode() kill d_instantiate_no_diralias() nfs_instantiate(): prevent multiple aliases for directory inode
2018-08-03udf: switch to discard_new_inode()Al Viro1-8/+4
we don't want open-by-handle to pick an in-core inode that has failed setup halfway through. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-06-20udf: Provide function for calculating dir entry lengthJan Kara1-11/+3
Provide function for calculating directory entry length and use to reduce code duplication. Signed-off-by: Jan Kara <jack@suse.cz>
2018-05-11do d_instantiate/unlock_new_inode combinations safelyAl Viro1-4/+2
For anything NFS-exported we do _not_ want to unlock new inode before it has grown an alias; original set of fixes got the ordering right, but missed the nasty complication in case of lockdep being enabled - unlock_new_inode() does lockdep_annotate_inode_mutex_key(inode) which can only be done before anyone gets a chance to touch ->i_mutex. Unfortunately, flipping the order and doing unlock_new_inode() before d_instantiate() opens a window when mkdir can race with open-by-fhandle on a guessed fhandle, leading to multiple aliases for a directory inode and all the breakage that follows from that. Correct solution: a new primitive (d_instantiate_new()) combining these two in the right order - lockdep annotate, then d_instantiate(), then the rest of unlock_new_inode(). All combinations of d_instantiate() with unlock_new_inode() should be converted to that. Cc: stable@kernel.org # 2.6.29 and later Tested-by: Mike Marshall <hubcap@omnibond.com> Reviewed-by: Andreas Dilger <adilger@dilger.ca> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2017-10-17udf: Fix signed/unsigned format specifiersSteve Magnani1-2/+2
Fix problems noted in compilion with -Wformat=2 -Wformat-signedness. In particular, a mismatch between the signedness of a value and the signedness of its format specifier can result in unsigned values being printed as negative numbers, e.g.: Partition (0 type 1511) starts at physical 460, block length -1779968542 ...which occurs when mounting a large (> 1 TiB) UDF partition. Changes since V1: * Fixed additional issues noted in udf_bitmap_free_blocks(), udf_get_fileident(), udf_show_options() Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Signed-off-by: Jan Kara <jack@suse.cz>
2017-10-17udf: Fix 64-bit sign extension issues affecting blocks > 0x7FFFFFFFSteve Magnani1-4/+5
Large (> 1 TiB) UDF filesystems appear subject to several problems when mounted on 64-bit systems: * readdir() can fail on a directory containing File Identifiers residing above 0x7FFFFFFF. This manifests as a 'ls' command failing with EIO. * FIBMAP on a file block located above 0x7FFFFFFF can return a negative value. The low 32 bits are correct, but applications that don't mask the high 32 bits of the result can perform incorrectly. Per suggestion by Jan Kara, introduce a udf_pblk_t type for representation of UDF block addresses. Ultimately, all driver functions that manipulate UDF block addresses should use this type; for now, deployment is limited to functions with actual or potential sign extension issues. Changes to udf_readdir() and udf_block_map() address the issues noted above; other changes address potential similar issues uncovered during audit of the driver code. Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Signed-off-by: Jan Kara <jack@suse.cz>
2017-08-16fs-udf: Improve six size determinationsMarkus Elfring1-1/+1
Replace the specification of data structures by variable references as the parameter for the operator "sizeof" to make the corresponding size determination a bit safer according to the Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Jan Kara <jack@suse.cz>
2017-04-24udf: use octal for permissionsFabian Frederick1-1/+1
According to commit f90774e1fd27 ("checkpatch: look for symbolic permissions and suggest octal instead") Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Jan Kara <jack@suse.cz>
2017-01-05udf: Make stat on symlink report symlink length as st_sizeJan Kara1-1/+1
UDF encodes symlinks in a more complex fashion and thus i_size of a symlink does not match the lenght of a string returned by readlink(2). This confuses some applications (see bug 191241) and may be considered a violation of POSIX. Fix the problem by reading the link into page cache in response to stat(2) call and report the length of the decoded path. Signed-off-by: Jan Kara <jack@suse.cz>
2016-10-10Merge remote-tracking branch 'ovl/rename2' into for-linusAl Viro1-1/+5
2016-09-27fs: Replace current_fs_time() with current_time()Deepa Dinamani1-10/+10
current_fs_time() uses struct super_block* as an argument. As per Linus's suggestion, this is changed to take struct inode* as a parameter instead. This is because the function is primarily meant for vfs inode timestamps. Also the function was renamed as per Arnd's suggestion. Change all calls to current_fs_time() to use the new current_time() function instead. current_fs_time() will be deleted. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-09-27fs: rename "rename2" i_op to "rename"Miklos Szeredi1-1/+1
Generated patch: sed -i "s/\.rename2\t/\.rename\t\t/" `git grep -wl rename2` sed -i "s/\brename2\b/rename/g" `git grep -wl rename2` Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2016-09-27fs: support RENAME_NOREPLACE for local filesystemsMiklos Szeredi1-2/+6
This is trivial to do: - add flags argument to foo_rename() - check if flags doesn't have any other than RENAME_NOREPLACE - assign foo_rename() to .rename2 instead of .rename Filesystems converted: affs, bfs, exofs, ext2, hfs, hfsplus, jffs2, jfs, logfs, minix, msdos, nilfs2, omfs, reiserfs, sysvfs, ubifs, udf, ufs, vfat. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Acked-by: Boaz Harrosh <ooo@electrozaur.com> Acked-by: Richard Weinberger <richard@nod.at> Acked-by: Bob Copeland <me@bobcopeland.com> Acked-by: Jan Kara <jack@suse.cz> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Jaegeuk Kim <jaegeuk@kernel.org> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: Mikulas Patocka <mpatocka@redhat.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Dave Kleikamp <shaggy@kernel.org> Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Christoph Hellwig <hch@infradead.org>
2016-04-10don't bother with ->d_inode->i_sb - it's always equal to ->d_sbAl Viro1-1/+1
... and neither can ever be NULL Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-02-09udf: Use separate buffer for copying split namesJan Kara1-2/+11
Code in udf_find_entry() and udf_readdir() used the same buffer for storing filename that was split among blocks and for the resulting filename in utf8. This worked because udf_get_filename() first internally copied the name into a different buffer and only then performed a conversion into the destination buffer. However we want to get rid of intermediate buffers so use separate buffer for converted name and name split between blocks so that we don't have the same source and destination buffer when converting split names. Signed-off-by: Jan Kara <jack@suse.cz>
2016-02-09udf: Adjust UDF_NAME_LEN to better reflect actual restrictionsAndrew Gabbasov1-5/+5
Actual name length restriction is 254 bytes, this is used in 'ustr' structure, and this is what fits into UDF File Ident structures. And in most cases the constant is used as UDF_NAME_LEN-2. So, it's better to just modify the constant to make it closer to reality. Also, in some cases it's useful to have a separate constant for the maximum length of file name field in CS0 encoding in UDF File Ident structures. Also, remove the unused UDF_PATH_LEN constant. Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com> Signed-off-by: Jan Kara <jack@suse.cz>
2016-02-09udf: Parameterize output length in udf_put_filenameAndrew Gabbasov1-4/+6
Make the desired output length a parameter rather than have it hard-coded to UDF_NAME_LEN. Although all call sites still have this length the same, this parameterization will make the function more universal and also consistent with udf_get_filename. Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com> Signed-off-by: Jan Kara <jack@suse.cz>
2015-12-08don't put symlink bodies in pagecache into highmemAl Viro1-0/+1
kmap() in page_follow_link_light() needed to go - allowing to hold an arbitrary number of kmaps for long is a great way to deadlocking the system. new helper (inode_nohighmem(inode)) needs to be used for pagecache symlinks inodes; done for all in-tree cases. page_follow_link_light() instrumented to yell about anything missed. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-12-06udf: don't duplicate page_symlink_inode_operationsAl Viro1-6/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-05-18UDF: support NFSv2 exportNeilBrown1-2/+2
The "fh_len" passed to ->fh_to_* is not guaranteed to be that same as that returned by encode_fh - it may be larger. With NFSv2, the filehandle is fixed length, so it may appear longer than expected and be zero-padded. So we must test that fh_len is at least some value, not exactly equal to it. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Jan Kara <jack@suse.cz>
2015-05-18udf: Return error from udf_find_entry()Fabian Frederick1-20/+71
Return appropriate error from udf_find_entry() instead of just NULL. That way we can distinguish the fact that some error happened when looking up filename (and return error to userspace) from the fact that we just didn't find the filename. Also update callers of udf_find_entry() accordingly. [JK: Improved udf_find_entry() documentation] Suggested-by: Jan Kara <jack@suse.cz> Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Jan Kara <jack@suse.cz>
2015-05-18udf: Return -ENOMEM when allocation fails in udf_get_filename()Fabian Frederick1-1/+1
Return -ENOMEM when allocation fails in udf_get_filename(). Update udf_pc_to_char(), udf_readdir(), and udf_find_entry() to handle the error appropriately. This allows us to pass appropriate error to userspace instead of corrupting symlink contents by omitting some path elements. Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Jan Kara <jack@suse.cz>
2015-04-26Merge branch 'for-linus' of ↵Linus Torvalds1-8/+8
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull fourth vfs update from Al Viro: "d_inode() annotations from David Howells (sat in for-next since before the beginning of merge window) + four assorted fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: RCU pathwalk breakage when running into a symlink overmounting something fix I_DIO_WAKEUP definition direct-io: only inc/dec inode->i_dio_count for file systems fs/9p: fix readdir() VFS: assorted d_backing_inode() annotations VFS: fs/inode.c helpers: d_inode() annotations VFS: fs/cachefiles: d_backing_inode() annotations VFS: fs library helpers: d_inode() annotations VFS: assorted weird filesystems: d_inode() annotations VFS: normal filesystems (and lustre): d_inode() annotations VFS: security/: d_inode() annotations VFS: security/: d_backing_inode() annotations VFS: net/: d_inode() annotations VFS: net/unix: d_backing_inode() annotations VFS: kernel/: d_inode() annotations VFS: audit: d_backing_inode() annotations VFS: Fix up some ->d_inode accesses in the chelsio driver VFS: Cachefiles should perform fs modifications on the top layer only VFS: AF_UNIX sockets should call mknod on the top layer only
2015-04-15VFS: normal filesystems (and lustre): d_inode() annotationsDavid Howells1-8/+8
that's the bulk of filesystem drivers dealing with inodes of their own Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-04-01udf: Update ctime and mtime when directory is modifiedJan Kara1-2/+7
We failed to update ctime & mtime of a directory when new entry was created in it during rename, link, create, etc. Fix that. Reported-by: Taesoo Kim <tsgatesv@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
2015-03-14udf: remove redundant buffer_head.h includesFabian Frederick1-1/+0
buffer_head.h was already included in udfdecl.h Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Jan Kara <jack@suse.cz>
2014-12-21udf: Reduce repeated dereferencesJan Kara1-9/+9
Replace repeated dereferences like dir->i_sb by storing superblock pointer in a variable and using that. Signed-off-by: Jan Kara <jack@suse.cz>
2014-12-19udf: Check path length when reading symlinkJan Kara1-1/+2
Symlink reading code does not check whether the resulting path fits into the page provided by the generic code. This isn't as easy as just checking the symlink size because of various encoding conversions we perform on path. So we have to check whether there is still enough space in the buffer on the fly. CC: stable@vger.kernel.org Reported-by: Carl Henrik Lunde <chlunde@ping.uio.no> Signed-off-by: Jan Kara <jack@suse.cz>
2014-09-04udf: saner calling conventions for udf_new_inode()Al Viro1-28/+16
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jan Kara <jack@suse.cz>
2014-09-04udf: fix the udf_iget() vs. udf_new_inode() racesAl Viro1-0/+7
Currently udf_iget() (triggered by NFS) can race with udf_new_inode() leading to two inode structures with the same inode number: nfsd: iget_locked() creates inode nfsd: try to read from disk, block on that. udf_new_inode(): allocate inode with that inumber udf_new_inode(): insert it into icache, set it up and dirty udf_write_inode(): write inode into buffer cache nfsd: get CPU again, look into buffer cache, see nice and sane on-disk inode, set the in-core inode from it Fix the problem by putting inode into icache in locked state (I_NEW set) and unlocking it only after it's fully set up. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jan Kara <jack@suse.cz>
2014-09-04udf: merge the pieces inserting a new non-directory object into directoryAl Viro1-69/+29
boilerplate code in udf_{create,mknod,symlink} taken to new helper symlink case converted to unique id calculated by udf_new_inode() - no point finding a new one. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jan Kara <jack@suse.cz>
2014-09-04udf: Make udf_read_inode() and udf_iget() return errorJan Kara1-13/+9
Currently __udf_read_inode() wasn't returning anything and we found out whether we succeeded reading inode by checking whether inode is bad or not. udf_iget() returned NULL on failure and inode pointer otherwise. Make these two functions properly propagate errors up the call stack and use the return value in callers. Signed-off-by: Jan Kara <jack@suse.cz>
2014-08-19udf: avoid unneeded up_write when fail to add entry in ->symlinkChao Yu1-1/+2
We have released the ->i_data_sem before invoking udf_add_entry(), so in following error path, we should not release this lock again. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jan Kara <jack@suse.cz>
2013-12-23udf: Fix lockdep warning from udf_symlink()Jan Kara1-1/+1
Lockdep is complaining about UDF: ============================================= [ INFO: possible recursive locking detected ] 3.12.0+ #16 Not tainted --------------------------------------------- ln/7386 is trying to acquire lock: (&ei->i_data_sem){+.+...}, at: [<ffffffff8142f06d>] udf_get_block+0x8d/0x130 but task is already holding lock: (&ei->i_data_sem){+.+...}, at: [<ffffffff81431a8d>] udf_symlink+0x8d/0x690 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&ei->i_data_sem); lock(&ei->i_data_sem); *** DEADLOCK *** This is because we hold i_data_sem of the symlink inode while calling udf_add_entry() for the directory. I don't think this can ever lead to deadlocks since we never hold i_data_sem for two inodes in any other place. The fix is simple - move unlock of i_data_sem for symlink inode up. We don't need it for anything when linking symlink inode to directory. Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Jan Kara <jack@suse.cz>
2013-06-29udf: provide ->tmpfile()Al Viro1-0/+24
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-26fs: encode_fh: return FILEID_INVALID if invalid fid_typeNamjae Jeon1-2/+2
This patch is a follow up on below patch: [PATCH] exportfs: add FILEID_INVALID to indicate invalid fid_type commit: 216b6cbdcbd86b1db0754d58886b466ae31f5a63 Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Vivek Trivedi <t.vivek@samsung.com> Acked-by: Steven Whitehouse <swhiteho@redhat.com> Acked-by: Sage Weil <sage@inktank.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-24Merge branch 'for_linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs Pull misc udf, ext2, ext3, and isofs fixes from Jan Kara: "Assorted, mostly trivial, fixes for udf, ext2, ext3, and isofs. I'm on vacation and scarcely checking email since we are expecting baby any day now but these fixes should be safe to go in and I don't want to delay them unnecessarily." * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: udf: avoid info leak on export isofs: avoid info leak on export udf: Improve table length check to avoid possible overflow ext3: Check return value of blkdev_issue_flush() jbd: Check return value of blkdev_issue_flush() udf: Do not decrement i_blocks when freeing indirect extent block udf: Fix memory leak when mounting ext2: cleanup the confused goto label UDF: Remove unnecessary variable "offset" from udf_fill_inode udf: stop using s_dirt ext3: force ro mount if ext3_setup_super() fails quota: fix checkpatch.pl warning by replacing <asm/uaccess.h> with <linux/uaccess.h>
2012-07-14don't pass nameidata to ->create()Al Viro1-1/+1
boolean "does it have to be exclusive?" flag is passed instead; Local filesystem should just ignore it - the object is guaranteed not to be there yet. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-14stop passing nameidata to ->lookup()Al Viro1-1/+1
Just the flags; only NFS cares even about that, but there are legitimate uses for such argument. And getting rid of that completely would require splitting ->lookup() into a couple of methods (at least), so let's leave that alone for now... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-07-13udf: avoid info leak on exportMathias Krause1-0/+1
For type 0x51 the udf.parent_partref member in struct fid gets copied uninitialized to userland. Fix this by initializing it to 0. Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Jan Kara <jack@suse.cz>
2012-05-29->encode_fh() API changeAl Viro1-9/+5
pass inode + parent's inode or NULL instead of dentry + bool saying whether we want the parent or not. NOTE: that needs ceph fix folded in. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-10vfs: make it possible to access the dentry hash/len as one 64-bit entryLinus Torvalds1-1/+1
This allows comparing hash and len in one operation on 64-bit architectures. Right now only __d_lookup_rcu() takes advantage of this, since that is the case we care most about. The use of anonymous struct/unions hides the alternate 64-bit approach from most users, the exception being a few cases where we initialize a 'struct qstr' with a static initializer. This makes the problematic cases use a new QSTR_INIT() helper function for that (but initializing just the name pointer with a "{ .name = xyzzy }" initializer remains valid, as does just copying another qstr structure). Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-20vfs: check i_nlink limits in vfs_{mkdir,rename_dir,link}Al Viro1-13/+0
New field of struct super_block - ->s_max_links. Maximal allowed value of ->i_nlink or 0; in the latter case all checks still need to be done in ->link/->mkdir/->rename instances. Note that this limit applies both to directoris and to non-directories. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-03switch ->mknod() to umode_tAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-03switch ->create() to umode_tAl Viro1-1/+1
vfs_create() ignores everything outside of 16bit subset of its mode argument; switching it to umode_t is obviously equivalent and it's the only caller of the method Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-03switch vfs_mkdir() and ->mkdir() to umode_tAl Viro1-1/+1
vfs_mkdir() gets int, but immediately drops everything that might not fit into umode_t and that's the only caller of ->mkdir()... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-11-02Merge branch 'for-next' of ↵Linus Torvalds1-9/+6
git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs-queue * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs-queue: vfs: add d_prune dentry operation vfs: protect i_nlink filesystems: add set_nlink() filesystems: add missing nlink wrappers logfs: remove unnecessary nlink setting ocfs2: remove unnecessary nlink setting jfs: remove unnecessary nlink setting hypfs: remove unnecessary nlink setting vfs: ignore error on forced remount readlinkat: ensure we return ENOENT for the empty pathname for normal lookups vfs: fix dentry leak in simple_fill_super()
2011-11-02filesystems: add set_nlink()Miklos Szeredi1-2/+2
Replace remaining direct i_nlink updates with a new set_nlink() updater function. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Tested-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2011-11-02filesystems: add missing nlink wrappersMiklos Szeredi1-7/+4
Replace direct i_nlink updates with the respective updater function (inc_nlink, drop_nlink, clear_nlink, inode_dec_link_count). Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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