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* nfsd: Fix oops when parsing a 0 length exportSasha Levin2012-01-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit b2ea70afade7080360ac55c4e64ff7a5fafdb67b upstream. expkey_parse() oopses when handling a 0 length export. This is easily triggerable from usermode by writing 0 bytes into '/proc/[proc id]/net/rpc/nfsd.fh/channel'. Below is the log: [ 1402.286893] BUG: unable to handle kernel paging request at ffff880077c49fff [ 1402.287632] IP: [<ffffffff812b4b99>] expkey_parse+0x28/0x2e1 [ 1402.287632] PGD 2206063 PUD 1fdfd067 PMD 1ffbc067 PTE 8000000077c49160 [ 1402.287632] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 1402.287632] CPU 1 [ 1402.287632] Pid: 20198, comm: trinity Not tainted 3.2.0-rc2-sasha-00058-gc65cd37 #6 [ 1402.287632] RIP: 0010:[<ffffffff812b4b99>] [<ffffffff812b4b99>] expkey_parse+0x28/0x2e1 [ 1402.287632] RSP: 0018:ffff880077f0fd68 EFLAGS: 00010292 [ 1402.287632] RAX: ffff880077c49fff RBX: 00000000ffffffea RCX: 0000000001043400 [ 1402.287632] RDX: 0000000000000000 RSI: ffff880077c4a000 RDI: ffffffff82283de0 [ 1402.287632] RBP: ffff880077f0fe18 R08: 0000000000000001 R09: ffff880000000000 [ 1402.287632] R10: 0000000000000000 R11: 0000000000000001 R12: ffff880077c4a000 [ 1402.287632] R13: ffffffff82283de0 R14: 0000000001043400 R15: ffffffff82283de0 [ 1402.287632] FS: 00007f25fec3f700(0000) GS:ffff88007d400000(0000) knlGS:0000000000000000 [ 1402.287632] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 1402.287632] CR2: ffff880077c49fff CR3: 0000000077e1d000 CR4: 00000000000406e0 [ 1402.287632] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1402.287632] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 1402.287632] Process trinity (pid: 20198, threadinfo ffff880077f0e000, task ffff880077db17b0) [ 1402.287632] Stack: [ 1402.287632] ffff880077db17b0 ffff880077c4a000 ffff880077f0fdb8 ffffffff810b411e [ 1402.287632] ffff880000000000 ffff880077db17b0 ffff880077c4a000 ffffffff82283de0 [ 1402.287632] 0000000001043400 ffffffff82283de0 ffff880077f0fde8 ffffffff81111f63 [ 1402.287632] Call Trace: [ 1402.287632] [<ffffffff810b411e>] ? lock_release+0x1af/0x1bc [ 1402.287632] [<ffffffff81111f63>] ? might_fault+0x97/0x9e [ 1402.287632] [<ffffffff81111f1a>] ? might_fault+0x4e/0x9e [ 1402.287632] [<ffffffff81a8bcf2>] cache_do_downcall+0x3e/0x4f [ 1402.287632] [<ffffffff81a8c950>] cache_write.clone.16+0xbb/0x130 [ 1402.287632] [<ffffffff81a8c9df>] ? cache_write_pipefs+0x1a/0x1a [ 1402.287632] [<ffffffff81a8c9f8>] cache_write_procfs+0x19/0x1b [ 1402.287632] [<ffffffff8118dc54>] proc_reg_write+0x8e/0xad [ 1402.287632] [<ffffffff8113fe81>] vfs_write+0xaa/0xfd [ 1402.287632] [<ffffffff8114142d>] ? fget_light+0x35/0x9e [ 1402.287632] [<ffffffff8113ff8b>] sys_write+0x48/0x6f [ 1402.287632] [<ffffffff81bbdb92>] system_call_fastpath+0x16/0x1b [ 1402.287632] Code: c0 c9 c3 55 48 63 d2 48 89 e5 48 8d 44 32 ff 41 57 41 56 41 55 41 54 53 bb ea ff ff ff 48 81 ec 88 00 00 00 48 89 b5 58 ff ff ff [ 1402.287632] 38 0a 0f 85 89 02 00 00 c6 00 00 48 8b 3d 44 4a e5 01 48 85 [ 1402.287632] RIP [<ffffffff812b4b99>] expkey_parse+0x28/0x2e1 [ 1402.287632] RSP <ffff880077f0fd68> [ 1402.287632] CR2: ffff880077c49fff [ 1402.287632] ---[ end trace 368ef53ff773a5e3 ]--- Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Cc: linux-nfs@vger.kernel.org Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* nfsd4: ignore WANT bits in open downgradeJ. Bruce Fields2011-11-111-0/+2
| | | | | | | | | | | commit c30e92df30d7d5fe65262fbce5d1b7de675fe34e upstream. We don't use WANT bits yet--and sending them can probably trigger a BUG() further down. Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* nfsd4: fix open downgrade, againJ. Bruce Fields2011-11-111-3/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 3d02fa29dec920c597dd7b7db608a4bc71f088ce upstream. Yet another open-management regression: - nfs4_file_downgrade() doesn't remove the BOTH access bit on downgrade, so the server's idea of the stateid's access gets out of sync with the client's. If we want to keep an O_RDWR open in this case, we should do that in the file_put_access logic rather than here. - We forgot to convert v4 access to an open mode here. This logic has proven too hard to get right. In the future we may consider: - reexamining the lock/openowner relationship (locks probably don't really need to take their own references here). - adding open upgrade/downgrade support to the vfs. - removing the atomic operations. They're redundant as long as this is all under some other lock. Also, maybe some kind of additional static checking would help catch O_/NFS4_SHARE_ACCESS confusion. Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* nfsd4: permit read opens of executable-only filesJ. Bruce Fields2011-11-113-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit a043226bc140a2c1dde162246d68a67e5043e6b2 upstream. A client that wants to execute a file must be able to read it. Read opens over nfs are therefore implicitly allowed for executable files even when those files are not readable. NFSv2/v3 get this right by using a passed-in NFSD_MAY_OWNER_OVERRIDE on read requests, but NFSv4 has gotten this wrong ever since dc730e173785e29b297aa605786c94adaffe2544 "nfsd4: fix owner-override on open", when we realized that the file owner shouldn't override permissions on non-reclaim NFSv4 opens. So we can't use NFSD_MAY_OWNER_OVERRIDE to tell nfsd_permission to allow reads of executable files. So, do the same thing we do whenever we encounter another weird NFS permission nit: define yet another NFSD_MAY_* flag. The industry's future standardization on 128-bit processors will be motivated primarily by the need for integers with enough bits for all the NFSD_MAY_* flags. Reported-by: Leonardo Borda <leonardoborda@gmail.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* nfsd4: fix seqid_mutating_errorJ. Bruce Fields2011-11-112-6/+12
| | | | | | | | | | | | | | commit 576163005de286bbd418fcb99cfd0971523a0c6d upstream. The set of errors here does *not* agree with the set of errors specified in the rfc! While we're there, turn this macros into a function, for the usual reasons, and move it to the one place where it's actually used. Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* nfsd4: stop using nfserr_resource for transitory errorsJ. Bruce Fields2011-11-113-9/+9
| | | | | | | | | | | | | commit 3e77246393c0a433247631a1f0e9ec98d3d78a1c upstream. The server is returning nfserr_resource for both permanent errors and for errors (like allocation failures) that might be resolved by retrying later. Save nfserr_resource for the former and use delay/jukebox for the latter. Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* nfsd4: Remove check for a 32-bit cookie in nfsd4_readdir()Bernd Schubert2011-11-111-1/+1
| | | | | | | | | | | | | | | commit 832023bffb4b493f230be901f681020caf3ed1f8 upstream. Fan Yong <yong.fan@whamcloud.com> noticed setting FMODE_32bithash wouldn't work with nfsd v4, as nfsd4_readdir() checks for 32 bit cookies. However, according to RFC 3530 cookies have a 64 bit type and cookies are also defined as u64 in 'struct nfsd4_readdir'. So remove the test for >32-bit values. Signed-off-by: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* nfsd4: fix file leak on open_downgradeJ. Bruce Fields2011-08-041-23/+8
| | | | | | | | | | | | | | | | | | | | | | | commit f197c27196a5e7631b89e2e92daa096fcf7c302c upstream. Stateid's hold a read reference for a read open, a write reference for a write open, and an additional one of each for each read+write open. The latter wasn't getting put on a downgrade, so something like: open RW open R downgrade to R was resulting in a file leak. Also fix an imbalance in an error path. Regression from 7d94784293096c0a46897acdb83be5abd9278ece "nfsd4: fix downgrade/lock logic". Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* nfsd4: remember to put RW access on stateid destructionJ. Bruce Fields2011-08-041-11/+6
| | | | | | | | | | | | | | | | | | | commit 499f3edc23ca0431f3a0a6736b3a40944c81bf3b upstream. Without this, for example, open read open read+write close will result in a struct file leak. Regression from 7d94784293096c0a46897acdb83be5abd9278ece "nfsd4: fix downgrade/lock logic". Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* nfsd: don't break lease on CLAIM_DELEGATE_CURCasey Bodley2011-08-041-6/+12
| | | | | | | | | | | | | | | | | commit 0c12eaffdf09466f36a9ffe970dda8f4aeb6efc0 upstream. CLAIM_DELEGATE_CUR is used in response to a broken lease; allowing it to break the lease and return EAGAIN leaves the client unable to make progress in returning the delegation nfs4_get_vfs_file() now takes struct nfsd4_open for access to the claim type, and calls nfsd_open() with NFSD_MAY_NOT_BREAK_LEASE when claim type is CLAIM_DELEGATE_CUR Signed-off-by: Casey Bodley <cbodley@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* nfsd4: fix break_lease flags on nfsd openJ. Bruce Fields2011-06-201-6/+9
| | | | | | | | | | Thanks to Casey Bodley for pointing out that on a read open we pass 0, instead of O_RDONLY, to break_lease, with the result that a read open is treated like a write open for the purposes of lease breaking! Reported-by: Casey Bodley <cbodley@citi.umich.edu> Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: link returns nfserr_delay when breaking leaseCasey Bodley2011-06-061-1/+3
| | | | | | | | | | | | | | fix for commit 4795bb37effb7b8fe77e2d2034545d062d3788a8, nfsd: break lease on unlink, link, and rename if the LINK operation breaks a delegation, it returns NFS4ERR_NOENT (which is not a valid error in rfc 5661) instead of NFS4ERR_DELAY. the return value of nfsd_break_lease() in nfsd_link() must be converted from host_err to err Signed-off-by: Casey Bodley <cbodley@citi.umich.edu> Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: v4 support requires CRYPTORandy Dunlap2011-06-061-0/+1
| | | | | | | | | | | | | nfsd V4 support uses crypto interfaces, so select CRYPTO to fix build errors in 2.6.39: ERROR: "crypto_destroy_tfm" [fs/nfsd/nfsd.ko] undefined! ERROR: "crypto_alloc_base" [fs/nfsd/nfsd.ko] undefined! Reported-by: Wakko Warner <wakko@animx.eu.org> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* nfsd: fix dependency of nfsd on auth_rpcgssJ. Bruce Fields2011-06-061-13/+6
| | | | | | | | | | | | | | | Commit b0b0c0a26e84 "nfsd: add proc file listing kernel's gss_krb5 enctypes" added an nunnecessary dependency of nfsd on the auth_rpcgss module. It's a little ad hoc, but since the only piece of information nfsd needs from rpcsec_gss_krb5 is a single static string, one solution is just to share it with an include file. Cc: stable@kernel.org Reported-by: Michael Guntsche <mike@it-loops.com> Cc: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* Merge branch 'for-2.6.40' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2011-05-299-48/+129
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-2.6.40' of git://linux-nfs.org/~bfields/linux: (22 commits) nfsd: make local functions static NFSD: Remove unused variable from nfsd4_decode_bind_conn_to_session() NFSD: Check status from nfsd4_map_bcts_dir() NFSD: Remove setting unused variable in nfsd_vfs_read() nfsd41: error out on repeated RECLAIM_COMPLETE nfsd41: compare request's opcnt with session's maxops at nfsd4_sequence nfsd v4.1 lOCKT clientid field must be ignored nfsd41: add flag checking for create_session nfsd41: make sure nfs server process OPEN with EXCLUSIVE4_1 correctly nfsd4: fix wrongsec handling for PUTFH + op cases nfsd4: make fh_verify responsibility of nfsd_lookup_dentry caller nfsd4: introduce OPDESC helper nfsd4: allow fh_verify caller to skip pseudoflavor checks nfsd: distinguish functions of NFSD_MAY_* flags svcrpc: complete svsk processing on cb receive failure svcrpc: take advantage of tcp autotuning SUNRPC: Don't wait for full record to receive tcp data svcrpc: copy cb reply instead of pages svcrpc: close connection if client sends short packet svcrpc: note network-order types in svc_process_calldir ...
| * nfsd: make local functions staticDaniel Mack2011-05-183-4/+4
| | | | | | | | | | | | | | | | | | | | This also fixes a number of sparse warnings. Signed-off-by: Daniel Mack <zonque@gmail.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * NFSD: Remove unused variable from nfsd4_decode_bind_conn_to_session()Bryan Schumaker2011-04-291-5/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Compiling gave me this warning: fs/nfsd/nfs4xdr.c: In function ‘nfsd4_decode_bind_conn_to_session’: fs/nfsd/nfs4xdr.c:427:6: warning: variable ‘dummy’ set but not used [-Wunused-but-set-variable] The local variable "dummy" wasn't being used past the READ32() macro that set it. READ_BUF() should ensure that the xdr buffer is pushed past the data read into dummy already, so nothing needs to be read in. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> [bfields@redhat.com: minor comment fixup.] Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * NFSD: Check status from nfsd4_map_bcts_dir()Bryan Schumaker2011-04-291-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | Compiling gave me this warning: fs/nfsd/nfs4state.c: In function ‘nfsd4_bind_conn_to_session’: fs/nfsd/nfs4state.c:1623:9: warning: variable ‘status’ set but not used [-Wunused-but-set-variable] The local variable "status" was being set by nfsd4_map_bcts_dir() and then ignored before calling nfsd4_new_conn(). Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * NFSD: Remove setting unused variable in nfsd_vfs_read()Bryan Schumaker2011-04-291-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Compiling gave me this warning: fs/nfsd/vfs.c: In function ‘nfsd_vfs_read’: fs/nfsd/vfs.c:880:16: warning: variable ‘inode’ set but not used [-Wunused-but-set-variable] I discovered that a local variable "inode" was being set towards the beginning of nfsd_vfs_read() and then ignored for the rest of the function. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd41: error out on repeated RECLAIM_COMPLETEMi Jinlong2011-04-291-5/+14
| | | | | | | | | | | | | | | | Servers are supposed to return nfserr_complete_already to clients that attempt to send multiple RECLAIM_COMPLETEs. Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd41: compare request's opcnt with session's maxops at nfsd4_sequenceMi Jinlong2011-04-291-0/+11
| | | | | | | | | | | | | | | | | | Make sure nfs server errors out if request contains more ops than channel allows. Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> [bfields@redhat.com: use helper function] Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd v4.1 lOCKT clientid field must be ignoredAndy Adamson2011-04-291-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | RFC 5661 Section 18.11.3 The clientid field of the owner MAY be set to any value by the client and MUST be ignored by the server. The reason the server MUST ignore the clientid field is that the server MUST derive the client ID from the session ID from the SEQUENCE operation of the COMPOUND request. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd41: add flag checking for create_sessionMi Jinlong2011-04-291-0/+3
| | | | | | | | | | | | | | | | | | Teach the NFS server to reject invalid create_session flags. Also do some minor formatting adjustments. Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd41: make sure nfs server process OPEN with EXCLUSIVE4_1 correctlyMi Jinlong2011-04-294-8/+20
| | | | | | | | | | | | | | | | | | | | | | The NFS server uses nfsd_create_v3 to handle EXCLUSIVE4_1 opens, but that function is not prepared to handle them. Rename nfsd_create_v3() to do_nfsd_create(), and add handling of EXCLUSIVE4_1. Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd4: fix wrongsec handling for PUTFH + op casesJ. Bruce Fields2011-04-292-11/+54
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When PUTFH is followed by an operation that uses the filehandle, and when the current client is using a security flavor that is inconsistent with the given filehandle, we have a choice: we can return WRONGSEC either when the current filehandle is set using the PUTFH, or when the filehandle is first used by the following operation. Follow the recommendations of RFC 5661 in making this choice. (Our current behavior prevented the client from doing security negotiation by returning WRONGSEC on PUTFH+SECINFO_NO_NAME.) Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd4: make fh_verify responsibility of nfsd_lookup_dentry callerJ. Bruce Fields2011-04-112-6/+6
| | | | | | | | | | | | The secinfo caller actually won't want this. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd4: introduce OPDESC helperJ. Bruce Fields2011-04-111-1/+6
| | | | | | | | Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd4: allow fh_verify caller to skip pseudoflavor checksJ. Bruce Fields2011-04-112-1/+2
| | | | | | | | Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * nfsd: distinguish functions of NFSD_MAY_* flagsJ. Bruce Fields2011-04-112-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | Most of the NFSD_MAY_* flags actually request permissions, but over the years we've accreted a few that modify the behavior of the permission or open code in other ways. Distinguish the two cases a little more. In particular, allow the shortcut at the start of nfsd_permission to ignore the non-permission-requesting bits. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * Merge branch 'for-2.6.39' into for-2.6.40J. Bruce Fields2011-04-071-1/+0
| |\
* | | treewide: fix a few typos in commentsJustin P. Mattock2011-05-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - kenrel -> kernel - whetehr -> whether - ttt -> tt - sss -> ss Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | | Open with O_CREAT flag set fails to open existing files on non writable ↵Sachin Prabhu2011-04-201-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | directories An open on a NFS4 share using the O_CREAT flag on an existing file for which we have permissions to open but contained in a directory with no write permissions will fail with EACCES. A tcpdump shows that the client had set the open mode to UNCHECKED which indicates that the file should be created if it doesn't exist and encountering an existing flag is not an error. Since in this case the file exists and can be opened by the user, the NFS server is wrong in attempting to check create permissions on the parent directory. The patch adds a conditional statement to check for create permissions only if the file doesn't exist. Signed-off-by: Sachin S. Prabhu <sprabhu@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* | | nfsd4: Fix filp leakOGAWA Hirofumi2011-04-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 23fcf2ec93fb8573a653408316af599939ff9a8e (nfsd4: fix oops on lock failure) The above patch breaks free path for stp->st_file. If stp was inserted into sop->so_stateids, we have to free stp->st_file refcount. Because stp->st_file refcount itself is taken whether or not any refcounts are taken on the stp->st_file->fi_fds[]. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* | | nfsd4: fix struct file leak on delegationJ. Bruce Fields2011-04-181-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Introduced by acfdf5c383b38f7f4dddae41b97c97f1ae058f49. Cc: stable@kernel.org Reported-by: Gerhard Heift <ml-nfs-linux-20110412-ef47@gheift.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* | | Merge branch 'for-2.6.39' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2011-04-112-4/+6
|\ \ \ | | | | | | | | | | | | | | | | | | | | * 'for-2.6.39' of git://linux-nfs.org/~bfields/linux: nfsd4: fix oops on lock failure nfsd: fix auth_domain reference leak on nlm operations
| * | | nfsd4: fix oops on lock failureJ. Bruce Fields2011-04-101-3/+6
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Lock stateid's can have access_bmap 0 if they were only partially initialized (due to a failed lock request); handle that case in free_generic_stateid. ------------[ cut here ]------------ kernel BUG at fs/nfsd/nfs4state.c:380! invalid opcode: 0000 [#1] SMP last sysfs file: /sys/kernel/mm/ksm/run Modules linked in: nfs fscache md4 nls_utf8 cifs ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat bridge stp llc nfsd lockd nfs_acl auth_rpcgss sunrpc ipv6 ppdev parport_pc parport pcnet32 mii pcspkr microcode i2c_piix4 BusLogic floppy [last unloaded: mperf] Pid: 1468, comm: nfsd Not tainted 2.6.38+ #120 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform EIP: 0060:[<e24f180d>] EFLAGS: 00010297 CPU: 0 EIP is at nfs4_access_to_omode+0x1c/0x29 [nfsd] EAX: ffffffff EBX: dd758120 ECX: 00000000 EDX: 00000004 ESI: dd758120 EDI: ddfe657c EBP: dd54dde0 ESP: dd54dde0 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 Process nfsd (pid: 1468, ti=dd54c000 task=ddc92580 task.ti=dd54c000) Stack: dd54ddf0 e24f19ca 00000000 ddfe6560 dd54de08 e24f1a5d dd758130 deee3a20 ddfe6560 31270000 dd54df1c e24f52fd 0000000f dd758090 e2505dd0 0be304cf dbb51d68 0000000e ddfe657c ddcd8020 dd758130 dd758128 dd7580d8 dd54de68 Call Trace: [<e24f19ca>] free_generic_stateid+0x1c/0x3e [nfsd] [<e24f1a5d>] release_lockowner+0x71/0x8a [nfsd] [<e24f52fd>] nfsd4_lock+0x617/0x66c [nfsd] [<e24e57b6>] ? nfsd_setuser+0x199/0x1bb [nfsd] [<e24e056c>] ? nfsd_setuser_and_check_port+0x65/0x81 [nfsd] [<c07a0052>] ? _cond_resched+0x8/0x1c [<c04ca61f>] ? slab_pre_alloc_hook.clone.33+0x23/0x27 [<c04cac01>] ? kmem_cache_alloc+0x1a/0xd2 [<c04835a0>] ? __call_rcu+0xd7/0xdd [<e24e0dfb>] ? fh_verify+0x401/0x452 [nfsd] [<e24f0b61>] ? nfsd4_encode_operation+0x52/0x117 [nfsd] [<e24ea0d7>] ? nfsd4_putfh+0x33/0x3b [nfsd] [<e24f4ce6>] ? nfsd4_delegreturn+0xd4/0xd4 [nfsd] [<e24ea2c9>] nfsd4_proc_compound+0x1ea/0x33e [nfsd] [<e24de6ee>] nfsd_dispatch+0xd1/0x1a5 [nfsd] [<e1d6e1c7>] svc_process_common+0x282/0x46f [sunrpc] [<e1d6e578>] svc_process+0xdc/0xfa [sunrpc] [<e24de0fa>] nfsd+0xd6/0x115 [nfsd] [<e24de024>] ? nfsd_shutdown+0x24/0x24 [nfsd] [<c0454322>] kthread+0x62/0x67 [<c04542c0>] ? kthread_worker_fn+0x114/0x114 [<c07a6ebe>] kernel_thread_helper+0x6/0x10 Code: eb 05 b8 00 00 27 4f 8d 65 f4 5b 5e 5f 5d c3 83 e0 03 55 83 f8 02 89 e5 74 17 83 f8 03 74 05 48 75 09 eb 09 b8 02 00 00 00 eb 0b <0f> 0b 31 c0 eb 05 b8 01 00 00 00 5d c3 55 89 e5 57 56 89 d6 8d EIP: [<e24f180d>] nfs4_access_to_omode+0x1c/0x29 [nfsd] SS:ESP 0068:dd54dde0 ---[ end trace 2b0bf6c6557cb284 ]--- The trace route is: -> nfsd4_lock() -> if (lock->lk_is_new) { -> alloc_init_lock_stateid() 3739: stp->st_access_bmap = 0; ->if (status && lock->lk_is_new && lock_sop) -> release_lockowner() -> free_generic_stateid() -> nfs4_access_bmap_to_omode() -> nfs4_access_to_omode() 380: BUG(); ***** This problem was introduced by 0997b173609b9229ece28941c118a2a9b278796e. Reported-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Tested-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | nfsd: fix auth_domain reference leak on nlm operationsJ. Bruce Fields2011-03-241-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This was noticed by users who performed more than 2^32 lock operations and hence made this counter overflow (eventually leading to use-after-free's). Setting rq_client to NULL here means that it won't later get auth_domain_put() when it should be. Appears to have been introduced in 2.5.42 by "[PATCH] kNFSd: Move auth domain lookup into svcauth" which moved most of the rq_client handling to common svcauth code, but left behind this one line. Cc: Neil Brown <neilb@suse.de> Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* | | Fix common misspellingsLucas De Marchi2011-03-313-4/+4
| |/ |/| | | | | | | | | Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
* | Merge branch 'for-2.6.39' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2011-03-248-95/+125
|\ \ | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-2.6.39' of git://linux-nfs.org/~bfields/linux: SUNRPC: Remove resource leak in svc_rdma_send_error() nfsd: wrong index used in inner loop nfsd4: fix comment and remove unused nfsd4_file fields nfs41: make sure nfs server return right ca_maxresponsesize_cached nfsd: fix compile error svcrpc: fix bad argument in unix_domain_find nfsd4: fix struct file leak nfsd4: minor nfs4state.c reshuffling svcrpc: fix rare race on unix_domain creation nfsd41: modify the members value of nfsd4_op_flags nfsd: add proc file listing kernel's gss_krb5 enctypes gss:krb5 only include enctype numbers in gm_upcall_enctypes NFSD, VFS: Remove dead code in nfsd_rename() nfsd: kill unused macro definition locks: use assign_type()
| * nfsd: wrong index used in inner loopMi Jinlong2011-03-171-4/+1
| | | | | | | | | | | | | | | | | | | | We must not use dummy for index. After the first index, READ32(dummy) will change dummy!!!! Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> [bfields@redhat.com: Trond points out READ_BUF alone is sufficient.] Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * Merge create_session decoding fix into for-2.6.39J. Bruce Fields2011-03-173-9/+10
| |\ | | | | | | | | | This needs a further fixup!
| * | nfsd4: fix comment and remove unused nfsd4_file fieldsJ. Bruce Fields2011-03-171-8/+4
| | | | | | | | | | | | | | | | | | | | | A couple fields here were left over from a previous version of a patch, and are no longer used. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | nfs41: make sure nfs server return right ca_maxresponsesize_cachedMi Jinlong2011-03-161-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to rfc5661, ca_maxresponsesize_cached: Like ca_maxresponsesize, but the maximum size of a reply that will be stored in the reply cache (Section 2.10.6.1). For each channel, the server MAY decrease this value, but MUST NOT increase it. the latest kernel(2.6.38-rc8) may increase the value for ignoring request's ca_maxresponsesize_cached value. We should not ignore it. Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | nfsd: fix compile errorJ. Bruce Fields2011-03-141-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "fs/built-in.o: In function `supported_enctypes_show': nfsctl.c:(.text+0x7beb0): undefined reference to `gss_mech_get_by_name' nfsctl.c:(.text+0x7bebc): undefined reference to `gss_mech_put' " Reported-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | nfsd4: fix struct file leakJ. Bruce Fields2011-03-081-11/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make sure we properly reference count the struct files that a lock depends on, and release them when the lock stateid is released. This fixes a major leak of struct files when using locking over nfsv4. Cc: stable@kernel.org Reported-by: Rick Koshi <nfs-bug-report@more-right-rudder.com> Tested-by: Ivo Přikryl <prikryl@eurosat.cz> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | nfsd4: minor nfs4state.c reshufflingJ. Bruce Fields2011-03-081-64/+61
| | | | | | | | | | | | | | | | | | | | | | | | Minor cleanup in preparation for a bugfix--moving some code to avoid forward references, etc. No change in functionality. Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | nfsd41: modify the members value of nfsd4_op_flagsMi Jinlong2011-03-071-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The members of nfsd4_op_flags, (ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS) equals to ALLOWED_AS_FIRST_OP, maybe that's not what we want. OP_PUTROOTFH with op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, can't appears as the first operation with out SEQUENCE ops. This patch modify the wrong value of ALLOWED_WITHOUT_FH etc which was introduced by f9bb94c4. Cc: stable@kernel.org Reviewed-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | nfsd: add proc file listing kernel's gss_krb5 enctypesKevin Coffman2011-03-071-1/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a new proc file which lists the encryption types supported by the kernel's gss_krb5 code. Newer MIT Kerberos libraries support the assertion of acceptor subkeys. This enctype information allows user-land (svcgssd) to request that the Kerberos libraries limit the encryption types that it uses when generating the subkeys. Signed-off-by: Kevin Coffman <kwc@citi.umich.edu> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | NFSD, VFS: Remove dead code in nfsd_rename()Jesper Juhl2011-03-071-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we have the following code in fs/nfsd/vfs.c::nfsd_rename() : ... host_err = nfsd_break_lease(odentry->d_inode); if (host_err) goto out_drop_write; if (ndentry->d_inode) { host_err = nfsd_break_lease(ndentry->d_inode); if (host_err) goto out_drop_write; } if (host_err) goto out_drop_write; ... 'host_err' is guaranteed to be 0 by the time we test 'ndentry->d_inode'. If 'host_err' becomes != 0 inside the 'if' statement, then we goto 'out_drop_write'. So, after the 'if' statement there is no way that 'host_err' can be anything but 0, so the test afterwards is just dead code. This patch removes the dead code. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | nfsd: kill unused macro definitionShan Wei2011-03-073-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | These macros had never been used for several years. So, remove them. Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
generated by cgit v1.1 at 2024-12-26 00:51:46 +0000