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| author | André Goddard Rosa <andre.goddard@gmail.com> | 2010-03-11 02:21:22 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-13 02:52:32 +0300 |
| commit | 6e3e37a5a7c91045497553bcbd6a5faea98b21b3 (patch) | |
| tree | 10aabb16410477cb65057e96a3bff804423675e2 | |
| parent | 5cacdb4add1b1e50fe75edc50ebbb7bddd9cf5e7 (diff) | |
| download | linux-6e3e37a5a7c91045497553bcbd6a5faea98b21b3.tar.xz | |
coredump: plug a memory leak situation on dump_seek()
After having started writing the coredump, if filesystem reports an error
anytime while writing part of the core file, we would leak a memory page
when bailing out.
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Roland McGrath <roland@redhat.com>
Cc: WANG Cong <amwang@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/coredump.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/include/linux/coredump.h b/include/linux/coredump.h index b3c91d7cede4..8ba66a9d9022 100644 --- a/include/linux/coredump.h +++ b/include/linux/coredump.h @@ -16,6 +16,8 @@ static inline int dump_write(struct file *file, const void *addr, int nr) static inline int dump_seek(struct file *file, loff_t off) { + int ret = 1; + if (file->f_op->llseek && file->f_op->llseek != no_llseek) { if (file->f_op->llseek(file, off, SEEK_CUR) < 0) return 0; @@ -29,13 +31,15 @@ static inline int dump_seek(struct file *file, loff_t off) if (n > PAGE_SIZE) n = PAGE_SIZE; - if (!dump_write(file, buf, n)) - return 0; + if (!dump_write(file, buf, n)) { + ret = 0; + break; + } off -= n; } free_page((unsigned long)buf); } - return 1; + return ret; } #endif /* _LINUX_COREDUMP_H */ |