linux-stable.git/arch/alpha/kernel/osf_sys.c, branch v4.4.232

sys: don't hold uts_sem while accessing userspace memory

2018-09-09T18:04:35+00:00

commit 42a0cc3478584d4d63f68f2f5af021ddbea771fa upstream.

Holding uts_sem as a writer while accessing userspace memory allows a
namespace admin to stall all processes that attempt to take uts_sem.
Instead, move data through stack buffers and don't access userspace memory
while uts_sem is held.

Cc: stable@vger.kernel.org
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Jann Horn 
Signed-off-by: Eric W. Biederman 
Signed-off-by: Greg Kroah-Hartman

osf_getdomainname(): use copy_to_user()

2018-09-09T18:04:35+00:00

commit 9ba3eb5103cf56f0daaf07de4507df76e7813ed7 upstream.

Signed-off-by: Al Viro 
Signed-off-by: Greg Kroah-Hartman

osf_wait4(): fix infoleak

2017-05-25T12:30:17+00:00

commit a8c39544a6eb2093c04afd5005b6192bd0e880c6 upstream.

failing sys_wait4() won't fill struct rusage...

Signed-off-by: Al Viro 
Signed-off-by: Greg Kroah-Hartman

alpha: Fix jiffies based cputime assumption

2015-07-29T13:44:58+00:00

That code wrongly assumes that cputime_t wraps jiffies_t. Lets use
the correct accessors/mutators.

In practice there should be no harm yet because alpha currently
only support tick based cputime accounting which is always jiffies
based.

Reviewed-by: Rik van Riel 
Cc: Richard Henderson 
Cc: Ivan Kokshaysky 
Cc: Christoph Lameter 
Cc: Ingo Molnar 
Cc; John Stultz 
Cc: Peter Zijlstra 
Cc: Preeti U Murthy 
Cc: Rik van Riel 
Cc: Thomas Gleixner 
Cc: Viresh Kumar 
Signed-off-by: Frederic Weisbecker

alpha: kernel: osf_sys: Set 'kts.tv_nsec' only when 'tv' has effect

2015-05-26T17:01:51+00:00

The related warning:

    CC      init/do_mounts.o
  arch/alpha/kernel/osf_sys.c: In function 'SyS_osf_settimeofday':
  arch/alpha/kernel/osf_sys.c:1028:14: warning: 'kts.tv_nsec' may be used uninitialized in this function [-Wmaybe-uninitialized]
    kts.tv_nsec *= 1000;
                ^
  arch/alpha/kernel/osf_sys.c:1016:18: note: 'kts' was declared here
    struct timespec kts;
                    ^

Signed-off-by: Chen Gang 
Signed-off-by: Matt Turner

vfs: make first argument of dir_context.actor typed

2014-10-31T21:48:54+00:00

Signed-off-by: Miklos Szeredi 
Signed-off-by: Al Viro

vfs: move getname() from callers to do_mount()

2014-10-09T06:39:16+00:00

It would make more sense to pass char __user * instead of
char * in callers of do_mount() and do getname() inside do_mount().

Suggested-by: Al Viro 
Signed-off-by: Seunghun Lee 
Signed-off-by: Al Viro

[readdir] constify ->actor

2013-06-29T08:57:05+00:00

Signed-off-by: Al Viro

[readdir] introduce iterate_dir() and dir_context

2013-06-29T08:46:46+00:00

iterate_dir(): new helper, replacing vfs_readdir().

struct dir_context: contains the readdir callback (and will get more stuff
in it), embedded into whatever data that callback wants to deal with;
eventually, we'll be passing it to ->readdir() replacement instead of
(data,filldir) pair.

Signed-off-by: Al Viro

mm: use vm_unmapped_area() on alpha architecture

2013-02-22T01:22:20+00:00

Update the alpha arch_get_unmapped_area function to make use of
vm_unmapped_area() instead of implementing a brute force search.

Signed-off-by: Michel Lespinasse 
Acked-by: Rik van Riel 
Cc: Richard Henderson 
Cc: Ivan Kokshaysky 
Cc: Matt Turner 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds