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[PATCH] fix page leak during core dump 

When the dump cannot occur most likely because of a full file system and
the page to be written is the zero page, the call to page_cache_release()
is missed.

Signed-off-by: Brian Pomerantz <bapper@mvista.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: David Howells <dhowells@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Brian Pomerantz 2007-04-01 23:49:41 -07:00 committed by Linus Torvalds
parent 2400ff77e7
commit 0322170260
2 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
fs/binfmt_elf.c
View File

@ -1704,7 +1704,10 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file)
DUMP_SEEK(PAGE_SIZE);
} else {
if (page == ZERO_PAGE(addr)) {
DUMP_SEEK(PAGE_SIZE);
if (!dump_seek(file, PAGE_SIZE)) {
page_cache_release(page);
goto end_coredump;
}
} else {
void *kaddr;
flush_cache_page(vma, addr,

2
fs/binfmt_elf_fdpic.c
View File

@ -1480,8 +1480,8 @@ static int elf_fdpic_dump_segments(struct file *file, struct mm_struct *mm,
DUMP_SEEK(file->f_pos + PAGE_SIZE);
}
else if (page == ZERO_PAGE(addr)) {
DUMP_SEEK(file->f_pos + PAGE_SIZE);
page_cache_release(page);
DUMP_SEEK(file->f_pos + PAGE_SIZE);
}
else {
void *kaddr;