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* mm: remove the pgprot argument to __vmallocChristoph Hellwig2020-06-024-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The pgprot argument to __vmalloc is always PAGE_KERNEL now, so remove it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> [hyperv] Acked-by: Gao Xiang <xiang@kernel.org> [erofs] Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Wei Liu <wei.liu@kernel.org> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Airlie <airlied@linux.ie> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Sakari Ailus <sakari.ailus@linux.intel.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will@kernel.org> Link: http://lkml.kernel.org/r/20200414131348.444715-22-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'linus' of ↵Linus Torvalds2020-06-013-34/+9
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 Pull crypto updates from Herbert Xu: "API: - Introduce crypto_shash_tfm_digest() and use it wherever possible. - Fix use-after-free and race in crypto_spawn_alg. - Add support for parallel and batch requests to crypto_engine. Algorithms: - Update jitter RNG for SP800-90B compliance. - Always use jitter RNG as seed in drbg. Drivers: - Add Arm CryptoCell driver cctrng. - Add support for SEV-ES to the PSP driver in ccp" * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (114 commits) crypto: hisilicon - fix driver compatibility issue with different versions of devices crypto: engine - do not requeue in case of fatal error crypto: cavium/nitrox - Fix a typo in a comment crypto: hisilicon/qm - change debugfs file name from qm_regs to regs crypto: hisilicon/qm - add DebugFS for xQC and xQE dump crypto: hisilicon/zip - add debugfs for Hisilicon ZIP crypto: hisilicon/hpre - add debugfs for Hisilicon HPRE crypto: hisilicon/sec2 - add debugfs for Hisilicon SEC crypto: hisilicon/qm - add debugfs to the QM state machine crypto: hisilicon/qm - add debugfs for QM crypto: stm32/crc32 - protect from concurrent accesses crypto: stm32/crc32 - don't sleep in runtime pm crypto: stm32/crc32 - fix multi-instance crypto: stm32/crc32 - fix run-time self test issue. crypto: stm32/crc32 - fix ext4 chksum BUG_ON() crypto: hisilicon/zip - Use temporary sqe when doing work crypto: hisilicon - add device error report through abnormal irq crypto: hisilicon - remove codes of directly report device errors through MSI crypto: hisilicon - QM memory management optimization crypto: hisilicon - unify initial value assignment into QM ...
| * ubifs: use crypto_shash_tfm_digest()Eric Biggers2020-05-083-34/+9
| | | | | | | | | | | | | | | | | | | | Instead of manually allocating a 'struct shash_desc' on the stack and calling crypto_shash_digest(), switch to using the new helper function crypto_shash_tfm_digest() which does this for us. Cc: linux-mtd@lists.infradead.org Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* | ubifs: fix wrong use of crypto_shash_descsize()Eric Biggers2020-05-172-24/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | crypto_shash_descsize() returns the size of the shash_desc context needed to compute the hash, not the size of the hash itself. crypto_shash_digestsize() would be correct, or alternatively using c->hash_len and c->hmac_desc_len which already store the correct values. But actually it's simpler to just use stack arrays, so do that instead. Fixes: 49525e5eecca ("ubifs: Add helper functions for authentication support") Fixes: da8ef65f9573 ("ubifs: Authenticate replayed journal") Cc: <stable@vger.kernel.org> # v4.20+ Cc: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Eric Biggers <ebiggers@google.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
* | ubifs: remove broken lazytime supportChristoph Hellwig2020-04-091-5/+1
|/ | | | | | | | | | | | | | When "ubifs: introduce UBIFS_ATIME_SUPPORT to ubifs" introduced atime support to ubifs, it also added lazytime support. As far as I can tell the lazytime support is terminally broken, as it causes mark_inode_dirty_sync to be called from __writeback_single_inode, which will then trigger the locking assert in ubifs_dirty_inode. Just remove the broken lazytime support for now, it can be added back later, especially as some infrastructure changes should make that easier soon. Fixes: 8c1c5f263833 ("ubifs: introduce UBIFS_ATIME_SUPPORT to ubifs") Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Richard Weinberger <richard@nod.at>
* Merge tag 'for-linus-5.7-rc1' of ↵Linus Torvalds2020-04-073-6/+24
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs Pull UBI and UBIFS updates from Richard Weinberger: - Fix for memory leaks around UBIFS orphan handling - Fix for memory leaks around UBI fastmap - Remove zero-length array from ubi-media.h - Fix for TNC lookup in UBIFS orphan code * tag 'for-linus-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs: ubi: ubi-media.h: Replace zero-length array with flexible-array member ubifs: Fix out-of-bounds memory access caused by abnormal value of node_len ubi: fastmap: Only produce the initial anchor PEB when fastmap is used ubi: fastmap: Free unused fastmap anchor peb during detach ubifs: ubifs_add_orphan: Fix a memory leak bug ubifs: ubifs_jnl_write_inode: Fix a memory leak bug ubifs: Fix ubifs_tnc_lookup() usage in do_kill_orphans()
| * ubifs: Fix out-of-bounds memory access caused by abnormal value of node_lenLiu Song2020-03-301-2/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In “ubifs_check_node”, when the value of "node_len" is abnormal, the code will goto label of "out_len" for execution. Then, in the following "ubifs_dump_node", if inode type is "UBIFS_DATA_NODE", in "print_hex_dump", an out-of-bounds access may occur due to the wrong "ch->len". Therefore, when the value of "node_len" is abnormal, data length should to be adjusted to a reasonable safe range. At this time, structured data is not credible, so dump the corrupted data directly for analysis. Signed-off-by: Liu Song <liu.song11@zte.com.cn> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: ubifs_add_orphan: Fix a memory leak bugZhihao Cheng2020-03-301-2/+7
| | | | | | | | | | | | | | | | | | Memory leak occurs when files with extended attributes are added to orphan list. Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Fixes: 988bec41318f3fa897e2f8 ("ubifs: orphan: Handle xattrs like files") Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: ubifs_jnl_write_inode: Fix a memory leak bugZhihao Cheng2020-03-301-0/+1
| | | | | | | | | | | | | | | | | | When inodes with extended attributes are evicted, xent is not freed in one exit branch. Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Fixes: 9ca2d732644484488db3112 ("ubifs: Limit number of xattrs per inode") Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Fix ubifs_tnc_lookup() usage in do_kill_orphans()Richard Weinberger2020-03-301-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | Orphans are allowed to point to deleted inodes. So -ENOENT is not a fatal error. Reported-by: Кочетков Максим <fido_max@inbox.ru> Reported-and-tested-by: "Christian Berger" <Christian.Berger@de.bosch.com> Tested-by: Karl Olsen <karl@micro-technic.com> Tested-by: Jef Driesen <jef.driesen@niko.eu> Fixes: ee1438ce5dc4 ("ubifs: Check link count of inodes when killing orphans.") Signed-off-by: Richard Weinberger <richard@nod.at>
* | ubifs: wire up FS_IOC_GET_ENCRYPTION_NONCEEric Biggers2020-03-191-0/+4
|/ | | | | | | | This new ioctl retrieves a file's encryption nonce, which is useful for testing. See the corresponding fs/crypto/ patch for more details. Link: https://lore.kernel.org/r/20200314205052.93294-5-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
* Merge branch 'imm.timestamp' of ↵Linus Torvalds2020-02-052-19/+10
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs timestamp updates from Al Viro: "More 64bit timestamp work" * 'imm.timestamp' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: kernfs: don't bother with timestamp truncation fs: Do not overload update_time fs: Delete timespec64_trunc() fs: ubifs: Eliminate timespec64_trunc() usage fs: ceph: Delete timespec64_trunc() usage fs: cifs: Delete usage of timespec64_trunc fs: fat: Eliminate timespec64_trunc() usage utimes: Clamp the timestamps in notify_change()
| * fs: ubifs: Eliminate timespec64_trunc() usageDeepa Dinamani2019-12-081-7/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | DEFAULT_TIME_GRAN is seconds granularity. We can just drop the nsec while creating the default root node. Delete the unneeded call to timespec64_trunc(). Also update the ktime_get_* api to match the one used in current_time(). This allows for the timestamps to be updated by using the same ktime_get_* api always. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Cc: richard@nod.at Cc: linux-mtd@lists.infradead.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * utimes: Clamp the timestamps in notify_change()Amir Goldstein2019-12-081-12/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Push clamping timestamps into notify_change(), so in-kernel callers like nfsd and overlayfs will get similar timestamp set behavior as utimes. AV: get rid of clamping in ->setattr() instances; we don't need to bother with that there, with notify_change() doing normalization in all cases now (it already did for implicit case, since current_time() clamps). Suggested-by: Miklos Szeredi <mszeredi@redhat.com> Fixes: 42e729b9ddbb ("utimes: Clamp the timestamps before update") Cc: stable@vger.kernel.org # v5.4 Cc: Deepa Dinamani <deepa.kernel@gmail.com> Cc: Jeff Layton <jlayton@kernel.org> Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge tag 'upstream-5.6-rc1' of ↵Linus Torvalds2020-01-305-7/+19
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs Pull UBI/UBIFS updates from Miquel Raynal: "This pull request contains mostly fixes for UBI and UBIFS: UBI: - Fixes for memory leaks in error paths - Fix for an logic error in a fastmap selfcheck UBIFS: - Fix for FS_IOC_SETFLAGS related to fscrypt flag - Support for FS_ENCRYPT_FL - Fix for a dead lock in bulk-read mode" Sent on behalf of Richard Weinberger who is traveling. * tag 'upstream-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs: ubi: Fix an error pointer dereference in error handling code ubifs: Fix memory leak from c->sup_node ubifs: Fix ino_t format warnings in orphan_delete() ubifs: Fix deadlock in concurrent bulk-read and writepage ubifs: Fix wrong memory allocation ubi: Free the normal volumes in error paths of ubi_attach_mtd_dev() ubi: Check the presence of volume before call ubi_fastmap_destroy_checkmap() ubifs: Add support for FS_ENCRYPT_FL ubifs: Fix FS_IOC_SETFLAGS unexpectedly clearing encrypt flag ubi: wl: Remove set but not used variable 'prev_e' ubi: fastmap: Fix inverted logic in seen selfcheck
| * | ubifs: Fix memory leak from c->sup_nodeQuanyang Wang2020-01-191-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The c->sup_node is allocated in function ubifs_read_sb_node but is not freed. This will cause memory leak as below: unreferenced object 0xbc9ce000 (size 4096): comm "mount", pid 500, jiffies 4294952946 (age 315.820s) hex dump (first 32 bytes): 31 18 10 06 06 7b f1 11 02 00 00 00 00 00 00 00 1....{.......... 00 10 00 00 06 00 00 00 00 00 00 00 08 00 00 00 ................ backtrace: [<d1c503cd>] ubifs_read_superblock+0x48/0xebc [<a20e14bd>] ubifs_mount+0x974/0x1420 [<8589ecc3>] legacy_get_tree+0x2c/0x50 [<5f1fb889>] vfs_get_tree+0x28/0xfc [<bbfc7939>] do_mount+0x4f8/0x748 [<4151f538>] ksys_mount+0x78/0xa0 [<d59910a9>] ret_fast_syscall+0x0/0x54 [<1cc40005>] 0x7ea02790 Free it in ubifs_umount and in the error path of mount_ubifs. Fixes: fd6150051bec ("ubifs: Store read superblock node") Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com> Signed-off-by: Richard Weinberger <richard@nod.at>
| * | ubifs: Fix ino_t format warnings in orphan_delete()Geert Uytterhoeven2020-01-171-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On alpha and s390x: fs/ubifs/debug.h:158:11: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 4 has type ‘ino_t {aka unsigned int}’ [-Wformat=] ... fs/ubifs/orphan.c:132:3: note: in expansion of macro ‘dbg_gen’ dbg_gen("deleted twice ino %lu", orph->inum); ... fs/ubifs/orphan.c:140:3: note: in expansion of macro ‘dbg_gen’ dbg_gen("delete later ino %lu", orph->inum); __kernel_ino_t is "unsigned long" on most architectures, but not on alpha and s390x, where it is "unsigned int". Hence when printing an ino_t, it should always be cast to "unsigned long" first. Fix this by re-adding the recently removed casts. Fixes: 8009ce956c3d2802 ("ubifs: Don't leak orphans on memory during commit") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Richard Weinberger <richard@nod.at>
| * | ubifs: Fix deadlock in concurrent bulk-read and writepageZhihao Cheng2020-01-161-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In ubifs, concurrent execution of writepage and bulk read on the same file may cause ABBA deadlock, for example (Reproduce method see Link): Process A(Bulk-read starts from page4) Process B(write page4 back) vfs_read wb_workfn or fsync ... ... generic_file_buffered_read write_cache_pages ubifs_readpage LOCK(page4) ubifs_bulk_read ubifs_writepage LOCK(ui->ui_mutex) ubifs_write_inode ubifs_do_bulk_read LOCK(ui->ui_mutex) find_or_create_page(alloc page4) ↑ LOCK(page4) <-- ABBA deadlock occurs! In order to ensure the serialization execution of bulk read, we can't remove the big lock 'ui->ui_mutex' in ubifs_bulk_read(). Instead, we allow ubifs_do_bulk_read() to lock page failed by replacing find_or_create_page(FGP_LOCK) with pagecache_get_page(FGP_LOCK | FGP_NOWAIT). Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Suggested-by: zhangyi (F) <yi.zhang@huawei.com> Cc: <Stable@vger.kernel.org> Fixes: 4793e7c5e1c ("UBIFS: add bulk-read facility") Link: https://bugzilla.kernel.org/show_bug.cgi?id=206153 Signed-off-by: Richard Weinberger <richard@nod.at>
| * | ubifs: Fix wrong memory allocationSascha Hauer2020-01-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In create_default_filesystem() when we allocate the idx node we must use the idx_node_size we calculated just one line before, not tmp, which contains completely other data. Fixes: c4de6d7e4319 ("ubifs: Refactor create_default_filesystem()") Cc: stable@vger.kernel.org # v4.20+ Reported-by: Naga Sureshkumar Relli <nagasure@xilinx.com> Tested-by: Naga Sureshkumar Relli <nagasure@xilinx.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
| * | ubifs: Add support for FS_ENCRYPT_FLEric Biggers2020-01-161-3/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the FS_IOC_GETFLAGS ioctl on ubifs return the FS_ENCRYPT_FL flag on encrypted files, like ext4 and f2fs do. Also make this flag be ignored by FS_IOC_SETFLAGS, like ext4 and f2fs do, since it's a recognized flag but is not directly settable. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Richard Weinberger <richard@nod.at>
| * | ubifs: Fix FS_IOC_SETFLAGS unexpectedly clearing encrypt flagEric Biggers2020-01-161-1/+2
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | UBIFS's implementation of FS_IOC_SETFLAGS fails to preserve existing inode flags that aren't settable by FS_IOC_SETFLAGS, namely the encrypt flag. This causes the encrypt flag to be unexpectedly cleared. Fix it by preserving existing unsettable flags, like ext4 and f2fs do. Test case with kvm-xfstests shell: FSTYP=ubifs KEYCTL_PROG=keyctl . fs/ubifs/config . ~/xfstests/common/encrypt dev=$(__blkdev_to_ubi_volume /dev/vdc) ubiupdatevol -t $dev mount $dev /mnt -t ubifs k=$(_generate_session_encryption_key) mkdir /mnt/edir xfs_io -c "set_encpolicy $k" /mnt/edir echo contents > /mnt/edir/file chattr +i /mnt/edir/file chattr -i /mnt/edir/file With the bug, the following errors occur on the last command: [ 18.081559] fscrypt (ubifs, inode 67): Inconsistent encryption context (parent directory: 65) chattr: Operation not permitted while reading flags on /mnt/edir/file Fixes: d475a507457b ("ubifs: Add skeleton for fscrypto") Cc: <stable@vger.kernel.org> # v4.10+ Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* | ubifs: allow both hash and disk name to be provided in no-key namesEric Biggers2020-01-223-6/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to support a new dirhash method that is a secret-keyed hash over the plaintext filenames (which will be used by encrypted+casefolded directories on ext4 and f2fs), fscrypt will be switching to a new no-key name format that always encodes the dirhash in the name. UBIFS isn't happy with this because it has assertions that verify that either the hash or the disk name is provided, not both. Change it to use the disk name if one is provided, even if a hash is available too; else use the hash. Link: https://lore.kernel.org/r/20200120223201.241390-6-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
* | ubifs: don't trigger assertion on invalid no-key filenameEric Biggers2020-01-221-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If userspace provides an invalid fscrypt no-key filename which encodes a hash value with any of the UBIFS node type bits set (i.e. the high 3 bits), gracefully report ENOENT rather than triggering ubifs_assert(). Test case with kvm-xfstests shell: . fs/ubifs/config . ~/xfstests/common/encrypt dev=$(__blkdev_to_ubi_volume /dev/vdc) ubiupdatevol $dev -t mount $dev /mnt -t ubifs mkdir /mnt/edir xfs_io -c set_encpolicy /mnt/edir rm /mnt/edir/_,,,,,DAAAAAAAAAAAAAAAAAAAAAAAAAA With the bug, the following assertion fails on the 'rm' command: [ 19.066048] UBIFS error (ubi0:0 pid 379): ubifs_assert_failed: UBIFS assert failed: !(hash & ~UBIFS_S_KEY_HASH_MASK), in fs/ubifs/key.h:170 Fixes: f4f61d2cc6d8 ("ubifs: Implement encrypted filenames") Cc: <stable@vger.kernel.org> # v4.10+ Link: https://lore.kernel.org/r/20200120223201.241390-5-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
* | ubifs: use IS_ENCRYPTED() instead of ubifs_crypt_is_encrypted()Eric Biggers2020-01-204-16/+9
| | | | | | | | | | | | | | | | | | | | | | There's no need for the ubifs_crypt_is_encrypted() function anymore. Just use IS_ENCRYPTED() instead, like ext4 and f2fs do. IS_ENCRYPTED() checks the VFS-level flag instead of the UBIFS-specific flag, but it shouldn't change any behavior since the flags are kept in sync. Link: https://lore.kernel.org/r/20191209212721.244396-1-ebiggers@kernel.org Acked-by: Richard Weinberger <richard@nod.at> Signed-off-by: Eric Biggers <ebiggers@google.com>
* | fscrypt: Allow modular crypto algorithmsHerbert Xu2019-12-311-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The commit 643fa9612bf1 ("fscrypt: remove filesystem specific build config option") removed modular support for fs/crypto. This causes the Crypto API to be built-in whenever fscrypt is enabled. This makes it very difficult for me to test modular builds of the Crypto API without disabling fscrypt which is a pain. As fscrypt is still evolving and it's developing new ties with the fs layer, it's hard to build it as a module for now. However, the actual algorithms are not required until a filesystem is mounted. Therefore we can allow them to be built as modules. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Link: https://lore.kernel.org/r/20191227024700.7vrzuux32uyfdgum@gondor.apana.org.au Signed-off-by: Eric Biggers <ebiggers@google.com>
* | fscrypt: don't check for ENOKEY from fscrypt_get_encryption_info()Eric Biggers2019-12-311-1/+1
|/ | | | | | | | fscrypt_get_encryption_info() returns 0 if the encryption key is unavailable; it never returns ENOKEY. So remove checks for ENOKEY. Link: https://lore.kernel.org/r/20191209212348.243331-1-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com>
* ubifs: ubifs_tnc_start_commit: Fix OOB in layout_in_gapsZhihao Cheng2019-11-171-7/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Running stress-test test_2 in mtd-utils on ubi device, sometimes we can get following oops message: BUG: unable to handle page fault for address: ffffffff00000140 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 280a067 P4D 280a067 PUD 0 Oops: 0000 [#1] SMP CPU: 0 PID: 60 Comm: kworker/u16:1 Kdump: loaded Not tainted 5.2.0 #13 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0 -0-ga698c8995f-prebuilt.qemu.org 04/01/2014 Workqueue: writeback wb_workfn (flush-ubifs_0_0) RIP: 0010:rb_next_postorder+0x2e/0xb0 Code: 80 db 03 01 48 85 ff 0f 84 97 00 00 00 48 8b 17 48 83 05 bc 80 db 03 01 48 83 e2 fc 0f 84 82 00 00 00 48 83 05 b2 80 db 03 01 <48> 3b 7a 10 48 89 d0 74 02 f3 c3 48 8b 52 08 48 83 05 a3 80 db 03 RSP: 0018:ffffc90000887758 EFLAGS: 00010202 RAX: ffff888129ae4700 RBX: ffff888138b08400 RCX: 0000000080800001 RDX: ffffffff00000130 RSI: 0000000080800024 RDI: ffff888138b08400 RBP: ffff888138b08400 R08: ffffea0004a6b920 R09: 0000000000000000 R10: ffffc90000887740 R11: 0000000000000001 R12: ffff888128d48000 R13: 0000000000000800 R14: 000000000000011e R15: 00000000000007c8 FS: 0000000000000000(0000) GS:ffff88813ba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff00000140 CR3: 000000013789d000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: destroy_old_idx+0x5d/0xa0 [ubifs] ubifs_tnc_start_commit+0x4fe/0x1380 [ubifs] do_commit+0x3eb/0x830 [ubifs] ubifs_run_commit+0xdc/0x1c0 [ubifs] Above Oops are due to the slab-out-of-bounds happened in do-while of function layout_in_gaps indirectly called by ubifs_tnc_start_commit. In function layout_in_gaps, there is a do-while loop placing index nodes into the gaps created by obsolete index nodes in non-empty index LEBs until rest index nodes can totally be placed into pre-allocated empty LEBs. @c->gap_lebs points to a memory area(integer array) which records LEB numbers used by 'in-the-gaps' method. Whenever a fitable index LEB is found, corresponding lnum will be incrementally written into the memory area pointed by @c->gap_lebs. The size ((@c->lst.idx_lebs + 1) * sizeof(int)) of memory area is allocated before do-while loop and can not be changed in the loop. But @c->lst.idx_lebs could be increased by function ubifs_change_lp (called by layout_leb_in_gaps->ubifs_find_dirty_idx_leb->get_idx_gc_leb) during the loop. So, sometimes oob happens when number of cycles in do-while loop exceeds the original value of @c->lst.idx_lebs. See detail in https://bugzilla.kernel.org/show_bug.cgi?id=204229. This patch fixes oob in layout_in_gaps. Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* ubifs: do_kill_orphans: Fix a memory leak bugZhihao Cheng2019-11-171-7/+10
| | | | | | | | | | | If there are more than one valid snod on the sleb->nodes list, do_kill_orphans will malloc ino more than once without releasing previous ino's memory. Finally, it will trigger memory leak. Fixes: ee1438ce5dc4 ("ubifs: Check link count of inodes when...") Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Signed-off-by: zhangyi (F) <yi.zhang@huawei.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* Revert "ubifs: Fix memory leak bug in alloc_ubifs_info() error path"Richard Weinberger2019-11-171-3/+1
| | | | | | | | | | | | | | | This reverts commit 9163e0184bd7d5f779934d34581843f699ad2ffd. At the point when ubifs_fill_super() runs, we have already a reference to the super block. So upon deactivate_locked_super() c will get free()'ed via ->kill_sb(). Cc: Wenwen Wang <wenwen@cs.uga.edu> Fixes: 9163e0184bd7 ("ubifs: Fix memory leak bug in alloc_ubifs_info() error path") Reported-by: https://twitter.com/grsecurity/status/1180609139359277056 Signed-off-by: Richard Weinberger <richard@nod.at> Tested-by: Romain Izard <romain.izard.pro@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* ubifs: Fix type of sup->hash_algoBen Dooks (Codethink)2019-11-171-1/+1
| | | | | | | | | | | | | | The sup->hash_algo is a __le16, and whilst 0xffff is the same in __le16 and u16, it would be better to use cpu_to_le16() anyway (which should deal with constants) and silence the following sparse warning: fs/ubifs/sb.c:187:32: warning: incorrect type in assignment (different base types) fs/ubifs/sb.c:187:32: expected restricted __le16 [usertype] hash_algo fs/ubifs/sb.c:187:32: got int Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
* ubifs: Fixed missed le64_to_cpu() in journalBen Dooks (Codethink)2019-11-171-1/+1
| | | | | | | | | | | | | | | | | In the ubifs_jnl_write_inode() functon, it calls ubifs_iget() with xent->inum. The xent->inum is __le64, but the ubifs_iget() takes native cpu endian. I think that this should be changed to passing le64_to_cpu(xent->inum) to fix the following sparse warning: fs/ubifs/journal.c:902:58: warning: incorrect type in argument 2 (different base types) fs/ubifs/journal.c:902:58: expected unsigned long inum fs/ubifs/journal.c:902:58: got restricted __le64 [usertype] inum Fixes: 7959cf3a7506 ("ubifs: journal: Handle xattrs like files") Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
* ubifs: Force prandom result to __le32Ben Dooks (Codethink)2019-11-171-1/+1
| | | | | | | | | | | | | In set_dent_cookie() the result of prandom_u32() is assinged to an __le32 type. Make this a forced conversion to remove the following sparse warning: fs/ubifs/journal.c:506:30: warning: incorrect type in assignment (different base types) fs/ubifs/journal.c:506:30: expected restricted __le32 [usertype] cookie fs/ubifs/journal.c:506:30: got unsigned int Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
* ubifs: Remove obsolete TODO from dfs_file_write()Richard Weinberger2019-11-171-12/+0
| | | | | | | | | | AFAICT this kind of problems are no longer possible since debugfs gained file removal protection via e9117a5a4bf6 ("debugfs: implement per-file removal protection"). Cc: Christoph Hellwig <hch@lst.de> Cc: Nicolai Stange <nicstange@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* Merge tag 'upstream-5.4-rc1' of ↵Linus Torvalds2019-09-214-3/+7
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs Pull UBI, UBIFS and JFFS2 updates from Richard Weinberger: "UBI: - Be less stupid when placing a fastmap anchor - Try harder to get an empty PEB in case of contention - Make ubiblock to warn if image is not a multiple of 512 UBIFS: - Various fixes in error paths JFFS2: - Various fixes in error paths" * tag 'upstream-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs: jffs2: Fix memory leak in jffs2_scan_eraseblock() error path jffs2: Remove jffs2_gc_fetch_page and jffs2_gc_release_page jffs2: Fix possible null-pointer dereferences in jffs2_add_frag_to_fragtree() ubi: block: Warn if volume size is not multiple of 512 ubifs: Fix memory leak bug in alloc_ubifs_info() error path ubifs: Fix memory leak in __ubifs_node_verify_hmac error path ubifs: Fix memory leak in read_znode() error path ubi: ubi_wl_get_peb: Increase the number of attempts while getting PEB ubi: Don't do anchor move within fastmap area ubifs: Remove redundant assignment to pointer fname
| * ubifs: Fix memory leak bug in alloc_ubifs_info() error pathWenwen Wang2019-09-151-1/+3
| | | | | | | | | | | | | | | | | | | | | | In ubifs_mount(), 'c' is allocated through kzalloc() in alloc_ubifs_info(). However, it is not deallocated in the following execution if ubifs_fill_super() fails, leading to a memory leak bug. To fix this issue, free 'c' before going to the 'out_deact' label. Fixes: 1e51764a3c2a ("UBIFS: add new flash file system") Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Fix memory leak in __ubifs_node_verify_hmac error pathWenwen Wang2019-09-151-1/+3
| | | | | | | | | | | | | | | | | | | | | | In __ubifs_node_verify_hmac(), 'hmac' is allocated through kmalloc(). However, it is not deallocated in the following execution if ubifs_node_calc_hmac() fails, leading to a memory leak bug. To fix this issue, free 'hmac' before returning the error. Fixes: 49525e5eecca ("ubifs: Add helper functions for authentication support") Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Fix memory leak in read_znode() error pathWenwen Wang2019-09-151-0/+1
| | | | | | | | | | | | | | | | | | | | | | In read_znode(), the indexing node 'idx' is allocated by kmalloc(). However, it is not deallocated in the following execution if ubifs_node_check_hash() fails, leading to a memory leak bug. To fix this issue, free 'idx' before returning the error. Fixes: 16a26b20d2af ("ubifs: authentication: Add hashes to index nodes") Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Remove redundant assignment to pointer fnameColin Ian King2019-09-151-1/+0
| | | | | | | | | | | | | | | | | | | | The pointer fname is being assigned with a value that is never read because the function returns after the assignment. The assignment is redundant and can be removed. Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* | Merge tag 'y2038-vfs' of ↵Linus Torvalds2019-09-191-9/+12
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground Pull y2038 vfs updates from Arnd Bergmann: "Add inode timestamp clamping. This series from Deepa Dinamani adds a per-superblock minimum/maximum timestamp limit for a file system, and clamps timestamps as they are written, to avoid random behavior from integer overflow as well as having different time stamps on disk vs in memory. At mount time, a warning is now printed for any file system that can represent current timestamps but not future timestamps more than 30 years into the future, similar to the arbitrary 30 year limit that was added to settimeofday(). This was picked as a compromise to warn users to migrate to other file systems (e.g. ext4 instead of ext3) when they need the file system to survive beyond 2038 (or similar limits in other file systems), but not get in the way of normal usage" * tag 'y2038-vfs' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground: ext4: Reduce ext4 timestamp warnings isofs: Initialize filesystem timestamp ranges pstore: fs superblock limits fs: omfs: Initialize filesystem timestamp ranges fs: hpfs: Initialize filesystem timestamp ranges fs: ceph: Initialize filesystem timestamp ranges fs: sysv: Initialize filesystem timestamp ranges fs: affs: Initialize filesystem timestamp ranges fs: fat: Initialize filesystem timestamp ranges fs: cifs: Initialize filesystem timestamp ranges fs: nfs: Initialize filesystem timestamp ranges ext4: Initialize timestamps limits 9p: Fill min and max timestamps in sb fs: Fill in max and min timestamps in superblock utimes: Clamp the timestamps before update mount: Add mount warning for impending timestamp expiry timestamp_truncate: Replace users of timespec64_trunc vfs: Add timestamp_truncate() api vfs: Add file timestamp range support
| * | timestamp_truncate: Replace users of timespec64_truncDeepa Dinamani2019-08-301-9/+12
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update the inode timestamp updates to use timestamp_truncate() instead of timespec64_trunc(). The change was mostly generated by the following coccinelle script. virtual context virtual patch @r1 depends on patch forall@ struct inode *inode; identifier i_xtime =~ "^i_[acm]time$"; expression e; @@ inode->i_xtime = - timespec64_trunc( + timestamp_truncate( ..., - e); + inode); Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Jeff Layton <jlayton@kernel.org> Cc: adrian.hunter@intel.com Cc: dedekind1@gmail.com Cc: gregkh@linuxfoundation.org Cc: hch@lst.de Cc: jaegeuk@kernel.org Cc: jlbec@evilplan.org Cc: richard@nod.at Cc: tj@kernel.org Cc: yuchao0@huawei.com Cc: linux-f2fs-devel@lists.sourceforge.net Cc: linux-ntfs-dev@lists.sourceforge.net Cc: linux-mtd@lists.infradead.org
* | Merge tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscryptLinus Torvalds2019-09-182-0/+31
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull fscrypt updates from Eric Biggers: "This is a large update to fs/crypto/ which includes: - Add ioctls that add/remove encryption keys to/from a filesystem-level keyring. These fix user-reported issues where e.g. an encrypted home directory can break NetworkManager, sshd, Docker, etc. because they don't get access to the needed keyring. These ioctls also provide a way to lock encrypted directories that doesn't use the vm.drop_caches sysctl, so is faster, more reliable, and doesn't always need root. - Add a new encryption policy version ("v2") which switches to a more standard, secure, and flexible key derivation function, and starts verifying that the correct key was supplied before using it. The key derivation improvement is needed for its own sake as well as for ongoing feature work for which the current way is too inflexible. Work is in progress to update both Android and the 'fscrypt' userspace tool to use both these features. (Working patches are available and just need to be reviewed+merged.) Chrome OS will likely use them too. This has also been tested on ext4, f2fs, and ubifs with xfstests -- both the existing encryption tests, and the new tests for this. This has also been in linux-next since Aug 16 with no reported issues. I'm also using an fscrypt v2-encrypted home directory on my personal desktop" * tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt: (27 commits) ext4 crypto: fix to check feature status before get policy fscrypt: document the new ioctls and policy version ubifs: wire up new fscrypt ioctls f2fs: wire up new fscrypt ioctls ext4: wire up new fscrypt ioctls fscrypt: require that key be added when setting a v2 encryption policy fscrypt: add FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS ioctl fscrypt: allow unprivileged users to add/remove keys for v2 policies fscrypt: v2 encryption policy support fscrypt: add an HKDF-SHA512 implementation fscrypt: add FS_IOC_GET_ENCRYPTION_KEY_STATUS ioctl fscrypt: add FS_IOC_REMOVE_ENCRYPTION_KEY ioctl fscrypt: add FS_IOC_ADD_ENCRYPTION_KEY ioctl fscrypt: rename keyinfo.c to keysetup.c fscrypt: move v1 policy key setup to keysetup_v1.c fscrypt: refactor key setup code in preparation for v2 policies fscrypt: rename fscrypt_master_key to fscrypt_direct_key fscrypt: add ->ci_inode to fscrypt_info fscrypt: use FSCRYPT_* definitions, not FS_* fscrypt: use FSCRYPT_ prefix for uapi constants ...
| * ubifs: wire up new fscrypt ioctlsEric Biggers2019-08-122-0/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Wire up the new ioctls for adding and removing fscrypt keys to/from the filesystem, and the new ioctl for retrieving v2 encryption policies. The key removal ioctls also required making UBIFS use fscrypt_drop_inode(). For more details see Documentation/filesystems/fscrypt.rst and the fscrypt patches that added the implementation of these ioctls. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Eric Biggers <ebiggers@google.com>
* | ubifs: Limit the number of pages in shrink_liabilityLiu Song2019-08-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | If the number of dirty pages to be written back is large, then writeback_inodes_sb will block waiting for a long time, causing hung task detection alarm. Therefore, we should limit the maximum number of pages written back this time, which let the budget be completed faster. The remaining dirty pages tend to rely on the writeback mechanism to complete the synchronization. Fixes: b6e51316daed ("writeback: separate starting of sync vs opportunistic writeback") Signed-off-by: Liu Song <liu.song11@zte.com.cn> Signed-off-by: Richard Weinberger <richard@nod.at>
* | ubifs: Correctly initialize c->min_log_bytesRichard Weinberger2019-08-221-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently on a freshly mounted UBIFS, c->min_log_bytes is 0. This can lead to a log overrun and make commits fail. Recent kernels will report the following assert: UBIFS assert failed: c->lhead_lnum != c->ltail_lnum, in fs/ubifs/log.c:412 c->min_log_bytes can have two states, 0 and c->leb_size. It controls how much bytes of the log area are reserved for non-bud nodes such as commit nodes. After a commit it has to be set to c->leb_size such that we have always enough space for a commit. While a commit runs it can be 0 to make the remaining bytes of the log available to writers. Having it set to 0 right after mount is wrong since no space for commits is reserved. Fixes: 1e51764a3c2ac ("UBIFS: add new flash file system") Reported-and-tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Richard Weinberger <richard@nod.at>
* | ubifs: Fix double unlock around orphan_delete()Richard Weinberger2019-08-221-2/+0
|/ | | | | | | | | We unlock after orphan_delete(), so no need to unlock in the function too. Reported-by: Han Xu <han.xu@nxp.com> Fixes: 8009ce956c3d ("ubifs: Don't leak orphans on memory during commit") Signed-off-by: Richard Weinberger <richard@nod.at>
* mm: migrate: remove unused mode argumentKeith Busch2019-07-181-1/+1
| | | | | | | | | | | | migrate_page_move_mapping() doesn't use the mode argument. Remove it and update callers accordingly. Link: http://lkml.kernel.org/r/20190508210301.8472-1-keith.busch@intel.com Signed-off-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Zi Yan <ziy@nvidia.com> Cc: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge tag 'upstream-5.3-rc1' of ↵Linus Torvalds2019-07-1412-92/+338
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs Pull UBIFS updates from Richard Weinberger: - Support for zstd compression - Support for offline signed filesystems - Various fixes for regressions * tag 'upstream-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs: ubifs: Don't leak orphans on memory during commit ubifs: Check link count of inodes when killing orphans. ubifs: Add support for zstd compression. ubifs: support offline signed images ubifs: remove unnecessary check in ubifs_log_start_commit ubifs: Fix typo of output in get_cs_sqnum ubifs: Simplify redundant code ubifs: Correctly use tnc_next() in search_dh_cookie()
| * ubifs: Don't leak orphans on memory during commitRichard Weinberger2019-07-081-26/+24
| | | | | | | | | | | | | | | | | | | | | | If an orphan has child orphans (xattrs), and due to a commit the parent orpahn cannot get free()'ed immediately, put also all child orphans on the erase list. Otherwise UBIFS will free() them only upon unmount and we waste memory. Fixes: 988bec41318f ("ubifs: orphan: Handle xattrs like files") Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Check link count of inodes when killing orphans.Richard Weinberger2019-07-081-9/+35
| | | | | | | | | | | | | | | | | | | | O_TMPFILE files can change their link count back to non-zero. This corner case needs to get addressed in the orphans subsystem too. Fixes: 474b93704f32 ("ubifs: Implement O_TMPFILE") Reported-by: Lars Persson <lists@bofh.nu> Signed-off-by: Richard Weinberger <richard@nod.at>
| * ubifs: Add support for zstd compression.Michele Dionisio2019-07-084-1/+40
| | | | | | | | | | | | | | | | | | | | zstd shows a good compression rate and is faster than lzo, also on slow ARM cores. Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Signed-off-by: Michele Dionisio <michele.dionisio@gmail.com> [rw: rewrote commit message] Signed-off-by: Richard Weinberger <richard@nod.at>
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