Skip to content

K
Kernel

openeuler / Kernel
接近 2 年 前同步成功

通知 8
Star 0
Fork 0
K
Kernel
切换分支/标签
  1. 23 9月, 2005 1 次提交
  3. 22 9月, 2005 3 次提交
  5. 20 9月, 2005 2 次提交
  7. 19 9月, 2005 3 次提交
  9. 18 9月, 2005 4 次提交
  11. 15 9月, 2005 4 次提交
    • D
      [COMPAT]: Fixup compat_do_execve() · 4a805e86
      由 David S. Miller 提交于 
      Missing acct_update_integrals() and update_mem_hiwater() calls
compared to it's native counterpart.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      4a805e86
    • D
      [PATCH] Fix the fdtable freeing in the case of vmalloced fdset/arrays · 0b175a7e
      由 Dipankar Sarma 提交于 
      Noted by David Miller:

  "The bug is that free_fd_array() takes a "num" argument, but when
   calling it from __free_fdtable() we're instead passing in the size in
   bytes (ie.  "num * sizeof(struct file *)")."

Yes it is a bug. I think I messed it up while merging newer
changes with an older version where I was using size in bytes
to optimize.
Signed-off-by: NDipankar Sarma <dipankar@in.ibm.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      0b175a7e
    • H
      [PATCH] error path in setup_arg_pages() misses vm_unacct_memory() · 2fd4ef85
      由 Hugh Dickins 提交于 
      Pavel Emelianov and Kirill Korotaev observe that fs and arch users of
security_vm_enough_memory tend to forget to vm_unacct_memory when a
failure occurs further down (typically in setup_arg_pages variants).

These are all users of insert_vm_struct, and that reservation will only
be unaccounted on exit if the vma is marked VM_ACCOUNT: which in some
cases it is (hidden inside VM_STACK_FLAGS) and in some cases it isn't.

So x86_64 32-bit and ppc64 vDSO ELFs have been leaking memory into
Committed_AS each time they're run.  But don't add VM_ACCOUNT to them,
it's inappropriate to reserve against the very unlikely case that gdb
be used to COW a vDSO page - we ought to do something about that in
do_wp_page, but there are yet other inconsistencies to be resolved.

The safe and economical way to fix this is to let insert_vm_struct do
the security_vm_enough_memory check when it finds VM_ACCOUNT is set.

And the MIPS irix_brk has been calling security_vm_enough_memory before
calling do_brk which repeats it, doubly accounting and so also leaking.
Remove that, and all the fs and arch calls to security_vm_enough_memory:
give it a less misleading name later on.
Signed-off-by: NHugh Dickins <hugh@veritas.com>
Signed-Off-By: NKirill Korotaev <dev@sw.ru>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      2fd4ef85
    • A
      [PATCH] Fix fs/exec.c:788 (de_thread()) BUG_ON · fb085cf1
      由 Alexander Nyberg 提交于 
      It turns out that the BUG_ON() in fs/exec.c: de_thread() is unreliable
and can trigger due to the test itself being racy.

de_thread() does
 	while (atomic_read(&sig->count) > count) {
	}
	.....
	.....
	BUG_ON(!thread_group_empty(current));

but release_task does
	write_lock_irq(&tasklist_lock)
	__exit_signal
		(this is where atomic_dec(&sig->count) is run)
	__exit_sighand
	__unhash_process
		takes write lock on tasklist_lock
		remove itself out of PIDTYPE_TGID list
	write_unlock_irq(&tasklist_lock)

so there's a clear (although small) window between the
atomic_dec(&sig->count) and the actual PIDTYPE_TGID unhashing of the
thread.

And actually there is no need for all threads to have exited at this
point, so we simply kill the BUG_ON.

Big thanks to Marc Lehmann who provided the test-case.

Fixes Bug 5170 (http://bugme.osdl.org/show_bug.cgi?id=5170)
Signed-off-by: NAlexander Nyberg <alexn@telia.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Andrew Morton <akpm@osdl.org>
Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      fb085cf1
  13. 13 9月, 2005 6 次提交
  15. 12 9月, 2005 2 次提交
  17. 11 9月, 2005 9 次提交
  19. 10 9月, 2005 6 次提交