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@xxxxxxxxx>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
---
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 b3c91d7..8ba66a9 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 */
--
1.7.0.1.164.gbe2f
--
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