From: Baokun Li <libaokun1@xxxxxxxxxx> Hello everyone! Recently we found some bugs while doing tests on cachefiles ondemand mode, and this patchset is a fix for some of those issues. The following is a brief overview of the patches, see the patches for more details. Patch 1-3: After an object has been cleaned up, make sure it has no outstanding requests and that the corresponding ondemand_object_worker has exited, otherwise it may use-after-free. Patch 4: Cyclic allocation of msg_id to avoid msg_id reuse misleading the daemon to cause hung. Patch 5: Hold xas_lock during polling to avoid dereferencing reqs causing use-after-free. Comments and questions are, as always, welcome. Thanks, Baokun Baokun Li (3): cachefiles: stop sending new request when dropping object cachefiles: flush all requests for the object that is being dropped cachefiles: cyclic allocation of msg_id to avoid reuse Hou Tao (1): cachefiles: flush ondemand_object_worker during clean object Jingbo Xu (1): cachefiles: add missing lock protection when polling fs/cachefiles/daemon.c | 4 +- fs/cachefiles/internal.h | 3 + fs/cachefiles/ondemand.c | 120 ++++++++++++++++++++++++++------------- 3 files changed, 86 insertions(+), 41 deletions(-) -- 2.39.2
