From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, "Yan, Zheng" <zyan@redhat.com>,
Jeff Layton <jlayton@redhat.com>,
Ilya Dryomov <idryomov@gmail.com>
Subject: [PATCH 4.14 24/25] ceph: hold i_ceph_lock when removing caps for freeing inode
Date: Fri, 2 Aug 2019 11:39:56 +0200 [thread overview]
Message-ID: <20190802092107.553439814@linuxfoundation.org> (raw)
In-Reply-To: <20190802092058.428079740@linuxfoundation.org>
From: Yan, Zheng <zyan@redhat.com>
commit d6e47819721ae2d9d090058ad5570a66f3c42e39 upstream.
ceph_d_revalidate(, LOOKUP_RCU) may call __ceph_caps_issued_mask()
on a freeing inode.
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/ceph/caps.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -1119,20 +1119,23 @@ static int send_cap_msg(struct cap_msg_a
}
/*
- * Queue cap releases when an inode is dropped from our cache. Since
- * inode is about to be destroyed, there is no need for i_ceph_lock.
+ * Queue cap releases when an inode is dropped from our cache.
*/
void ceph_queue_caps_release(struct inode *inode)
{
struct ceph_inode_info *ci = ceph_inode(inode);
struct rb_node *p;
+ /* lock i_ceph_lock, because ceph_d_revalidate(..., LOOKUP_RCU)
+ * may call __ceph_caps_issued_mask() on a freeing inode. */
+ spin_lock(&ci->i_ceph_lock);
p = rb_first(&ci->i_caps);
while (p) {
struct ceph_cap *cap = rb_entry(p, struct ceph_cap, ci_node);
p = rb_next(p);
__ceph_remove_cap(cap, true);
}
+ spin_unlock(&ci->i_ceph_lock);
}
/*
next prev parent reply other threads:[~2019-08-02 9:55 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-02 9:39 [PATCH 4.14 00/25] 4.14.136-stable review Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 01/25] VSOCK: use TCP state constants for sk_state Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 02/25] vsock: correct removal of socket from the list Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 03/25] NFS: Fix dentry revalidation on NFSv4 lookup Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 04/25] NFS: Refactor nfs_lookup_revalidate() Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 05/25] NFSv4: Fix lookup revalidate of regular files Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 06/25] arm64: dts: marvell: Fix A37xx UART0 register size Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 07/25] i2c: qup: fixed releasing dma without flush operation completion Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 08/25] arm64: compat: Provide definition for COMPAT_SIGMINSTKSZ Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 09/25] binder: fix possible UAF when freeing buffer Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 10/25] ISDN: hfcsusb: checking idx of ep configuration Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 11/25] media: au0828: fix null dereference in error path Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 12/25] ath10k: Change the warning message string Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 13/25] media: cpia2_usb: first wake up, then free in disconnect Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 14/25] media: pvrusb2: use a different format for warnings Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 15/25] NFS: Cleanup if nfs_match_client is interrupted Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 16/25] media: radio-raremono: change devm_k*alloc to k*alloc Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 17/25] iommu/vt-d: Dont queue_iova() if there is no flush queue Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 18/25] iommu/iova: Fix compilation error with !CONFIG_IOMMU_IOVA Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 19/25] hv_sock: Add support for delayed close Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 20/25] Bluetooth: hci_uart: check for missing tty operations Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 21/25] sched/fair: Dont free p->numa_faults with concurrent readers Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 22/25] drivers/pps/pps.c: clear offset flags in PPS_SETPARAMS ioctl Greg Kroah-Hartman
2019-08-02 9:39 ` [PATCH 4.14 23/25] Fix allyesconfig output Greg Kroah-Hartman
2019-08-02 9:39 ` Greg Kroah-Hartman [this message]
2019-08-02 9:39 ` [PATCH 4.14 25/25] sched/fair: Use RCU accessors consistently for ->numa_group Greg Kroah-Hartman
2019-08-02 15:37 ` Greg Kroah-Hartman
2019-08-02 13:59 ` [PATCH 4.14 00/25] 4.14.136-stable review Thierry Reding
2019-08-02 15:50 ` Greg Kroah-Hartman
2019-08-03 5:43 ` Naresh Kamboju
2019-08-02 23:20 ` shuah
2019-08-03 15:59 ` Guenter Roeck
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