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  1. 29 4月, 2008 1 次提交
  3. 16 4月, 2008 1 次提交
  5. 16 2月, 2008 2 次提交
  7. 14 2月, 2008 1 次提交
    • S
      [CIFS] fixup prefixpaths which contain multiple path components · 03a143c9
      由 Steve French 提交于 
      Currently, when we get a prefixpath as part of mount, the kernel only
changes the first character to be a '/' or '\' depending on whether
posix extensions are enabled. This is problematic as it expects
mount.cifs to pass in the correct delimiter in the rest of the
prefixpath. But, mount.cifs may not know *what* the correct delimiter
is. It's a chicken and egg problem.

Note that mount.cifs should not do conversion of the
prefixpath - if we want posix behavior then '\' is legal in a path
(and we have had bugs in the distant path to prove to me that
customers sometimes have apps that require '\').  The kernel code
assumes that the path passed in is posix (and current code will handle
the first path component fine but was broken for Windows mounts
for "deep" prefixpaths unless the user specified a prefixpath with '\'
deep in it.   So e.g. with current kernel code:

1) mount to //server/share/dir1 will work to all server types
2) mount to //server/share/dir1/subdir1 will work to Samba
3) mount to //server/share/dir1\\subdir1 will work to Windows

But case two would fail to Windows without the fix.
With the kernel cifs module fix case two now works.

First analyzed by Jeff Layton and Simo Sorce

CC: Jeff Layton <jlayton@redhat.com>
CC: Simo Sorce <simo@samba.org>
Signed-off-by: NSteve French <sfrench@us.ibm.com>
      03a143c9
  9. 13 2月, 2008 1 次提交
  11. 25 1月, 2008 1 次提交
  13. 04 1月, 2008 1 次提交
  15. 31 12月, 2007 1 次提交
    • J
      [CIFS] redo existing session setup if needed in cifs_mount · 1d9a8852
      由 Jeff Layton 提交于 
      When cifs_mount finds an existing SMB session that it can use for a new
mount, it does not check to see whether that session is in need of being
reconnected. An easy way to reproduce:

1) mount //server/share1
2) watch /proc/fs/cifs/DebugData for the share to go DISCONNECTED
3) mount //server/share2 with same creds as in step 1.

The second mount will fail because CIFSTCon returned -EAGAIN. If you do
an operation in share1 and then reattempt the mount it will work (since
the session is reestablished).

The following patch fixes this by having cifs_mount check the status
of the session when it picks an existing session and calling
cifs_setup_session on it again if it's in need of reconnection.

Thanks to Wojciech Pilorz for the initial bug report.
Signed-off-by: NJeff Layton <jlayton@tupile.poochiereds.net>
Signed-off-by: NSteve French <sfrench@us.ibm.com>
      1d9a8852
  17. 20 11月, 2007 1 次提交
  19. 17 11月, 2007 3 次提交
  21. 14 11月, 2007 1 次提交
    • S
      [CIFS] Fix buffer overflow if server sends corrupt response to small · 133672ef
      由 Steve French 提交于 
      request

In SendReceive() function in transport.c - it memcpy's
message payload into a buffer passed via out_buf param. The function
assumes that all buffers are of size (CIFSMaxBufSize +
MAX_CIFS_HDR_SIZE) , unfortunately it is also called with smaller
(MAX_CIFS_SMALL_BUFFER_SIZE) buffers.  There are eight callers
(SMB worker functions) which are primarily affected by this change:

TreeDisconnect, uLogoff, Close, findClose, SetFileSize, SetFileTimes,
Lock and PosixLock

CC: Dave Kleikamp <shaggy@austin.ibm.com>
CC: Przemyslaw Wegrzyn <czajnik@czajsoft.pl>
Acked-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NSteve French <sfrench@us.ibm.com>
      133672ef
  23. 13 11月, 2007 1 次提交
  25. 10 11月, 2007 1 次提交
    • J
      [CIFS] fix oops on second mount to same server when null auth is used · 9b8f5f57
      由 Jeff Layton 提交于 
      When a share is mounted using no username, cifs_mount sets
volume_info.username as a NULL pointer, and the sesInfo userName as an
empty string. The volume_info.username is passed to a couple of other
functions to see if there is an existing unc or tcp connection that can
be used. These functions assume that the username will be a valid
string that can be passed to strncmp. If the pointer is NULL, then the
kernel will oops if there's an existing session to which the string
can be compared.

This patch changes cifs_mount to set volume_info.username to an empty
string in this situation, which prevents the oops and should make it
so that the comparison to other null auth sessions match.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NSteve French <sfrench@us.ibm.com>
      9b8f5f57
  27. 02 11月, 2007 1 次提交
  29. 20 10月, 2007 1 次提交
  31. 18 10月, 2007 1 次提交
    • S
      [CIFS] fix bad handling of EAGAIN error on kernel_recvmsg in cifs_demultiplex_thread · c18c732e
      由 Steve French 提交于 
      When kernel_recvmsg returns -EAGAIN or -ERESTARTSYS, then
cifs_demultiplex_thread sleeps for a bit and then tries the read again.
When it does this, it's not zeroing out the length and that throws off
the value of total_read. Fix it to zero out the length.

Can cause memory corruption:
If kernel_recvmsg returns an error and total_read is a large enough
value, then we'll end up going through the loop again. total_read will
be a bogus value, as will (pdu_length-total_read). When this happens we
end up calling kernel_recvmsg with a bogus value (possibly larger than
the current iov_len).

At that point, memcpy_toiovec can overrun iov. It will start walking
up the stack, casting other things that are there to struct iovecs
(since it assumes that it's been passed an array of them). Any pointer
on the stack at an address above the kvec is a candidate for corruption
here.

Many thanks to Ulrich Obergfell for pointing this out.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NSteve French <sfrench@us.ibm.com>
      c18c732e
  33. 17 10月, 2007 1 次提交
  35. 05 10月, 2007 1 次提交
    • S
      [CIFS] Fix cifsd so shuts down when signing fails during mount · a013689d
      由 Steve French 提交于 
      Fixes two problems:
1) we dropped down to negotiating lanman if we did not recognize the
mechanism (krb5 e.g.)
2) we did not stop cifsd (thus will fail when doing rmod cifs with
slab free errors) when we fail tcon but have a bad session (which is
the case in which signing is required but we don't allow signing on
the client)

It also turns on extended security flag in the header when passing
"sec=krb5" on mount command (although kerberos support is not done of
course)
Acked-by: NJeff Layton <jlayton@redhat.com>
CC: Shaggy <shaggy@us.ibm.com>
Signed-off-by: NSteve French <sfrench@us.ibm.com>
      a013689d
  37. 04 10月, 2007 1 次提交
  39. 29 9月, 2007 1 次提交
  41. 25 9月, 2007 1 次提交
  43. 20 9月, 2007 2 次提交
  45. 15 9月, 2007 2 次提交
  47. 31 8月, 2007 3 次提交
  49. 19 7月, 2007 1 次提交
  51. 18 7月, 2007 2 次提交
    • S
      [CIFS] More whitespace/formatting fixes (noticed by checkpatch) · 63135e08
      由 Steve French 提交于 
      Signed-off-by: NSteve French <sfrench@us.ibm.com>
      63135e08
    • R
      Freezer: make kernel threads nonfreezable by default · 83144186
      由 Rafael J. Wysocki 提交于 
      Currently, the freezer treats all tasks as freezable, except for the kernel
threads that explicitly set the PF_NOFREEZE flag for themselves.  This
approach is problematic, since it requires every kernel thread to either
set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't
care for the freezing of tasks at all.

It seems better to only require the kernel threads that want to or need to
be frozen to use some freezer-related code and to remove any
freezer-related code from the other (nonfreezable) kernel threads, which is
done in this patch.

The patch causes all kernel threads to be nonfreezable by default (ie.  to
have PF_NOFREEZE set by default) and introduces the set_freezable()
function that should be called by the freezable kernel threads in order to
unset PF_NOFREEZE.  It also makes all of the currently freezable kernel
threads call set_freezable(), so it shouldn't cause any (intentional)
change of behaviour to appear.  Additionally, it updates documentation to
describe the freezing of tasks more accurately.

[akpm@linux-foundation.org: build fixes]
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NNigel Cunningham <nigel@nigel.suspend2.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      83144186
  53. 13 7月, 2007 1 次提交
  55. 10 7月, 2007 1 次提交
  57. 09 7月, 2007 1 次提交
  59. 28 6月, 2007 1 次提交
  61. 26 6月, 2007 1 次提交
  63. 25 6月, 2007 1 次提交