* [PATCH] locks: fix file_lock deletion inside loop
@ 2015-03-27 2:34 Yan, Zheng
2015-03-27 11:14 ` Jeff Layton
0 siblings, 1 reply; 2+ messages in thread
From: Yan, Zheng @ 2015-03-27 2:34 UTC (permalink / raw)
To: linux-fsdevel; +Cc: viro, jeff.layton, Yan, Zheng
locks_delete_lock_ctx() is called inside the loop, so we
should use list_for_each_entry_safe.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
---
fs/locks.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/fs/locks.c b/fs/locks.c
index 528fedf..40bc384 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1388,9 +1388,8 @@ any_leases_conflict(struct inode *inode, struct file_lock *breaker)
int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
{
int error = 0;
- struct file_lock *new_fl;
struct file_lock_context *ctx = inode->i_flctx;
- struct file_lock *fl;
+ struct file_lock *new_fl, *fl, *tmp;
unsigned long break_time;
int want_write = (mode & O_ACCMODE) != O_RDONLY;
LIST_HEAD(dispose);
@@ -1420,7 +1419,7 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
break_time++; /* so that 0 means no break time */
}
- list_for_each_entry(fl, &ctx->flc_lease, fl_list) {
+ list_for_each_entry_safe(fl, tmp, &ctx->flc_lease, fl_list) {
if (!leases_conflict(fl, new_fl))
continue;
if (want_write) {
--
1.9.3
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] locks: fix file_lock deletion inside loop
2015-03-27 2:34 [PATCH] locks: fix file_lock deletion inside loop Yan, Zheng
@ 2015-03-27 11:14 ` Jeff Layton
0 siblings, 0 replies; 2+ messages in thread
From: Jeff Layton @ 2015-03-27 11:14 UTC (permalink / raw)
To: Yan, Zheng; +Cc: linux-fsdevel, viro
On Fri, 27 Mar 2015 10:34:20 +0800
"Yan, Zheng" <zyan@redhat.com> wrote:
> locks_delete_lock_ctx() is called inside the loop, so we
> should use list_for_each_entry_safe.
>
> Signed-off-by: Yan, Zheng <zyan@redhat.com>
> ---
> fs/locks.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/fs/locks.c b/fs/locks.c
> index 528fedf..40bc384 100644
> --- a/fs/locks.c
> +++ b/fs/locks.c
> @@ -1388,9 +1388,8 @@ any_leases_conflict(struct inode *inode, struct file_lock *breaker)
> int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
> {
> int error = 0;
> - struct file_lock *new_fl;
> struct file_lock_context *ctx = inode->i_flctx;
> - struct file_lock *fl;
> + struct file_lock *new_fl, *fl, *tmp;
> unsigned long break_time;
> int want_write = (mode & O_ACCMODE) != O_RDONLY;
> LIST_HEAD(dispose);
> @@ -1420,7 +1419,7 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
> break_time++; /* so that 0 means no break time */
> }
>
> - list_for_each_entry(fl, &ctx->flc_lease, fl_list) {
> + list_for_each_entry_safe(fl, tmp, &ctx->flc_lease, fl_list) {
> if (!leases_conflict(fl, new_fl))
> continue;
> if (want_write) {
Well spotted. I'll plan to merge this, give it a bit of testing and send
on to Linus next week sometime.
Thanks,
--
Jeff Layton <jeff.layton@primarydata.com>
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