linux.git/fs/cifs, branch master

cifs: initialize file_info_lock

2017-01-14T20:58:29+00:00

Reviewed-by: Jeff Layton CC: Stable file_info_lock is not initalized in initiate_cifs_search(), leading to the following splat after a simple "mount.cifs ... dir && ls dir/": BUG: spinlock bad magic on CPU#0, ls/486 lock: 0xffff880009301110, .magic: 00000000, .owner: /-1, .owner_cpu: 0 CPU: 0 PID: 486 Comm: ls Not tainted 4.9.0 #27 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) ffffc900042f3db0 ffffffff81327533 0000000000000000 ffff880009301110 ffffc900042f3dd0 ffffffff810baf75 ffff880009301110 ffffffff817ae077 ffffc900042f3df0 ffffffff810baff6 ffff880009301110 ffff880008d69900 Call Trace: [] dump_stack+0x65/0x92 [] spin_dump+0x85/0xe0 [] spin_bug+0x26/0x30 [] do_raw_spin_lock+0xe9/0x130 [] _raw_spin_lock+0x1f/0x30 [] cifs_closedir+0x4d/0x100 [] __fput+0x5d/0x160 [] ____fput+0xe/0x10 [] task_work_run+0x7e/0xa0 [] exit_to_usermode_loop+0x92/0xa0 [] syscall_return_slowpath+0x49/0x50 [] entry_SYSCALL_64_fastpath+0xa7/0xa9 Fixes: 3afca265b5f53a0 ("Clarify locking of cifs file and tcon structures and make more granular") Signed-off-by: Rabin Vincent Signed-off-by: Steve French

Replace with globally

2016-12-24T19:46:01+00:00

This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*' sed -i -e "s!$PATT!#include !" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro Signed-off-by: Linus Torvalds

Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6

2016-12-24T19:37:18+00:00

Pull cifs fixes from Steve French: "This ncludes various cifs/smb3 bug fixes, mostly for stable as well. In the next week I expect that Germano will have some reconnection fixes, and also I expect to have the remaining pieces of the snapshot enablement and SMB3 ACLs, but wanted to get this set of bug fixes in" * 'for-next' of git://git.samba.org/sfrench/cifs-2.6: cifs_get_root shouldn't use path with tree name Fix default behaviour for empty domains and add domainauto option cifs: use %16phN for formatting md5 sum cifs: Fix smbencrypt() to stop pointing a scatterlist at the stack CIFS: Fix a possible double locking of mutex during reconnect CIFS: Fix a possible memory corruption during reconnect CIFS: Fix a possible memory corruption in push locks CIFS: Fix missing nls unload in smb2_reconnect() CIFS: Decrease verbosity of ioctl call SMB3: parsing for new snapshot timestamp mount parm

Merge uncontroversial parts of branch 'readlink' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs

2016-12-18T03:16:12+00:00

Pull partial readlink cleanups from Miklos Szeredi. This is the uncontroversial part of the readlink cleanup patch-set that simplifies the default readlink handling. Miklos and Al are still discussing the rest of the series. * git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs: vfs: make generic_readlink() static vfs: remove ".readlink = generic_readlink" assignments vfs: default to generic_readlink() vfs: replace calling i_op->readlink with vfs_readlink() proc/self: use generic_readlink ecryptfs: use vfs_get_link() bad_inode: add missing i_op initializers

cifs_get_root shouldn't use path with tree name

2016-12-15T07:42:54+00:00

When a server returns the optional flag SMB_SHARE_IS_IN_DFS in response to a tree connect, cifs_build_path_to_root() will return a pathname which includes the hostname. This causes problems with cifs_get_root() which separates each component and does a lookup for each component of the path which in this case will incorrectly include looking up the hostname component as a path component. We encountered a problem with dfs shares hosted by a Netapp. When connecting to nodes pointed to by the DFS share. The tree connect for these nodes return SMB_SHARE_IS_IN_DFS resulting failures in lookup in cifs_get_root(). RH bz: 1373153 The patch was tested against a Netapp simulator and by a user using an actual Netapp server. Signed-off-by: Sachin Prabhu Reported-by: Pierguido Lambri Reviewed-by: Jeff Layton Signed-off-by: Steve French

Fix default behaviour for empty domains and add domainauto option

2016-12-15T07:42:38+00:00

With commit 2b149f119 many things have been fixed/introduced. However, the default behaviour for RawNTLMSSP authentication seems to be wrong in case the domain is not passed on the command line. The main points (see below) of the patch are: - It alignes behaviour with Windows clients - It fixes backward compatibility - It fixes UPN I compared this behavour with the one from a Windows 10 command line client. When no domains are specified on the command line, I traced the packets and observed that the client does send an empty domain to the server. In the linux kernel case, the empty domain is replaced by the primary domain communicated by the SMB server. This means that, if the credentials are valid against the local server but that server is part of a domain, then the kernel module will ask to authenticate against that domain and we will get LOGON failure. I compared the packet trace from the smbclient when no domain is passed and, in that case, a default domain from the client smb.conf is taken. Apparently, connection succeeds anyway, because when the domain passed is not valid (in my case WORKGROUP), then the local one is tried and authentication succeeds. I tried with any kind of invalid domain and the result was always a connection. So, trying to interpret what to do and picking a valid domain if none is passed, seems the wrong thing to do. To this end, a new option "domainauto" has been added in case the user wants a mechanism for guessing. Without this patch, backward compatibility also is broken. With kernel 3.10, the default auth mechanism was NTLM. One of our testing servers accepted NTLM and, because no domains are passed, authentication was local. Moving to RawNTLMSSP forced us to change our command line to add a fake domain to pass to prevent this mechanism to kick in. For the same reasons, UPN is broken because the domain is specified in the username. The SMB server will work out the domain from the UPN and authenticate against the right server. Without the patch, though, given the domain is empty, it gets replaced with another domain that could be the wrong one for the authentication. Signed-off-by: Germano Percossi Acked-by: Pavel Shilovsky Signed-off-by: Steve French

cifs: use %16phN for formatting md5 sum

2016-12-15T06:21:37+00:00

Passing a gazillion arguments takes a lot of code: add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-253 (-253) Signed-off-by: Rasmus Villemoes Reviewed-by: Pavel Shilovsky Signed-off-by: Steve French

cifs: Fix smbencrypt() to stop pointing a scatterlist at the stack

2016-12-14T07:44:16+00:00

smbencrypt() points a scatterlist to the stack, which is breaks if CONFIG_VMAP_STACK=y. Fix it by switching to crypto_cipher_encrypt_one(). The new code should be considerably faster as an added benefit. This code is nearly identical to some code that Eric Biggers suggested. Cc: stable@vger.kernel.org # 4.9 only Reported-by: Eric Biggers Signed-off-by: Andy Lutomirski Acked-by: Jeff Layton Signed-off-by: Steve French

Merge branch 'for-4.10/block' of git://git.kernel.dk/linux-block

2016-12-13T18:19:16+00:00

Pull block layer updates from Jens Axboe: "This is the main block pull request this series. Contrary to previous release, I've kept the core and driver changes in the same branch. We always ended up having dependencies between the two for obvious reasons, so makes more sense to keep them together. That said, I'll probably try and keep more topical branches going forward, especially for cycles that end up being as busy as this one. The major parts of this pull request is: - Improved support for O_DIRECT on block devices, with a small private implementation instead of using the pig that is fs/direct-io.c. From Christoph. - Request completion tracking in a scalable fashion. This is utilized by two components in this pull, the new hybrid polling and the writeback queue throttling code. - Improved support for polling with O_DIRECT, adding a hybrid mode that combines pure polling with an initial sleep. From me. - Support for automatic throttling of writeback queues on the block side. This uses feedback from the device completion latencies to scale the queue on the block side up or down. From me. - Support from SMR drives in the block layer and for SD. From Hannes and Shaun. - Multi-connection support for nbd. From Josef. - Cleanup of request and bio flags, so we have a clear split between which are bio (or rq) private, and which ones are shared. From Christoph. - A set of patches from Bart, that improve how we handle queue stopping and starting in blk-mq. - Support for WRITE_ZEROES from Chaitanya. - Lightnvm updates from Javier/Matias. - Supoort for FC for the nvme-over-fabrics code. From James Smart. - A bunch of fixes from a whole slew of people, too many to name here" * 'for-4.10/block' of git://git.kernel.dk/linux-block: (182 commits) blk-stat: fix a few cases of missing batch flushing blk-flush: run the queue when inserting blk-mq flush elevator: make the rqhash helpers exported blk-mq: abstract out blk_mq_dispatch_rq_list() helper blk-mq: add blk_mq_start_stopped_hw_queue() block: improve handling of the magic discard payload blk-wbt: don't throttle discard or write zeroes nbd: use dev_err_ratelimited in io path nbd: reset the setup task for NBD_CLEAR_SOCK nvme-fabrics: Add FC LLDD loopback driver to test FC-NVME nvme-fabrics: Add target support for FC transport nvme-fabrics: Add host support for FC transport nvme-fabrics: Add FC transport LLDD api definitions nvme-fabrics: Add FC transport FC-NVME definitions nvme-fabrics: Add FC transport error codes to nvme.h Add type 0x28 NVME type code to scsi fc headers nvme-fabrics: patch target code in prep for FC transport support nvme-fabrics: set sqe.command_id in core not transports parser: add u64 number parser nvme-rdma: align to generic ib_event logging helper ...

vfs: remove ".readlink = generic_readlink" assignments

2016-12-09T15:45:04+00:00

If .readlink == NULL implies generic_readlink(). Generated by: to_del="\.readlink.*=.*generic_readlink" for i in `git grep -l $to_del`; do sed -i "/$to_del"/d $i; done Signed-off-by: Miklos Szeredi