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Hugh Dickins 2fd4ef85e0 [PATCH] error path in setup_arg_pages() misses vm_unacct_memory() ... 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: Hugh Dickins <hugh@veritas.com> Signed-Off-By: Kirill Korotaev <dev@sw.ru> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		20 years ago
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boot	[PATCH] PPC64: large INITRD causes kernel not to boot	20 years ago
configs	[PATCH] ppc64: Add CONFIG_HZ	20 years ago
kernel	[PATCH] error path in setup_arg_pages() misses vm_unacct_memory()	20 years ago
lib	[PATCH] spinlock consolidation	20 years ago
mm	[PATCH] ppc64: Add ptrace data breakpoint support	20 years ago
oprofile	[PATCH] ppc64: Move oprofile_model into cpu feature struct	20 years ago
xmon	[PATCH] ppc64: Add ptrace data breakpoint support	20 years ago
Kconfig	[PATCH] Kconfig fix (BLK_DEV_FD dependencies)	20 years ago
Kconfig.debug	[PATCH] ppc64: update xmon helptext	20 years ago
Makefile	[PATCH] powerpc: Move include3 to arch/$(ARCH)/include	20 years ago
defconfig	[PATCH] ppc64: Add CONFIG_HZ	20 years ago