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| author | Nikolay Borisov <kernel@kyup.com> | 2016-10-10 15:38:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-28 03:01:35 -0400 |
| commit | e382e130d45a9f95c8da77bc8bca1464ae9c6cae (patch) | |
| tree | 74ccde9eade17430904aed8f2dd17c497e653b3f /Documentation/gdb-kernel-debugging.txt | |
| parent | 08cd19c602145b75e2782831e1822f6fe7f560c9 (diff) | |
ceph: fix error handling in ceph_read_iter
commit 0d7718f666be181fda1ba2d08f137d87c1419347 upstream.
In case __ceph_do_getattr returns an error and the retry_op in
ceph_read_iter is not READ_INLINE, then it's possible to invoke
__free_page on a page which is NULL, this naturally leads to a crash.
This can happen when, for example, a process waiting on a MDS reply
receives sigterm.
Fix this by explicitly checking whether the page is set or not.
Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Reviewed-by: Yan, Zheng <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/gdb-kernel-debugging.txt')
0 files changed, 0 insertions, 0 deletions