linux-toradex.git/kernel/exec_domain.c, branch imx-android-r10.4

sys_personality: change sys_personality() to accept "unsigned int" instead of u_long

2010-06-04T22:21:45+00:00

task_struct->pesonality is "unsigned int", but sys_personality() paths use
"unsigned long pesonality".  This means that every assignment or
comparison is not right.  In particular, if this argument does not fit
into "unsigned int" __set_personality() changes the caller's personality
and then sys_personality() returns -EINVAL.

Turn this argument into "unsigned int" and avoid overflows.  Obviously,
this is the user-visible change, we just ignore the upper bits.  But this
can't break the sane application.

There is another thing which can confuse the poorly written applications.
User-space thinks that this syscall returns int, not long.  This means
that the returned value can be negative and look like the error code.  But
note that libc won't be confused and thus errno won't be set, and with
this patch the user-space can never get -1 unless sys_personality() really
fails.  And, most importantly, the negative RET != -1 is only possible if
that app previously called personality(RET).

Pointed-out-by: Wenming Zhang 
Suggested-by: Linus Torvalds 
Signed-off-by: Oleg Nesterov 
Cc: "H. Peter Anvin" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Get rid of indirect include of fs_struct.h

2009-04-01T03:00:27+00:00

Don't pull it in sched.h; very few files actually need it and those
can include directly.  sched.h itself only needs forward declaration
of struct fs_struct;

Signed-off-by: Al Viro

Kill unsharing fs_struct in __set_personality()

2009-04-01T03:00:25+00:00

That's a rudiment of altroot support.  I.e. it should've been buried
a long time ago.

Signed-off-by: Al Viro

[CVE-2009-0029] System call wrappers part 04

2009-01-14T13:15:19+00:00

Signed-off-by: Heiko Carstens

proc: move /proc/execdomains to kernel/exec_domain.c

2008-10-23T10:30:41+00:00

Signed-off-by: Alexey Dobriyan

[PATCH] kill altroot

2008-07-27T00:53:20+00:00

long overdue...

Signed-off-by: Al Viro

remove CONFIG_KMOD from core kernel code

2008-07-22T09:24:31+00:00

Always compile request_module when the kernel allows modules.

Signed-off-by: Johannes Berg 
Signed-off-by: Rusty Russell

whitespace fixes: execution domains

2007-10-18T21:37:26+00:00

Signed-off-by: Daniel Walker 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Remove obsolete #include

2006-06-30T17:25:36+00:00

Signed-off-by: Jörn Engel 
Signed-off-by: Adrian Bunk

[PATCH] Fix module refcount leak in __set_personality()

2006-03-24T15:33:30+00:00

If the change of personality does not lead to change of exec domain,
__set_personality() returned without releasing the module reference
acquired by lookup_exec_domain().

Signed-off-by: Sergey Vlasov 
Cc: Christoph Hellwig 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds