From: Xin Yin Date: Fri, 27 May 2022 10:18:00 +0000 (+0800) Subject: erofs: fix crash when enable tracepoint cachefiles_prep_read X-Git-Tag: v6.6.17~7377^2~5 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b5cb79dcfd03e7bb8054d38eaaa557d07966a811;p=platform%2Fkernel%2Flinux-rpi.git erofs: fix crash when enable tracepoint cachefiles_prep_read RIP: 0010:trace_event_raw_event_cachefiles_prep_read+0x88/0xe0 [cachefiles] Call Trace: cachefiles_prepare_read+0x1d7/0x3a0 [cachefiles] erofs_fscache_read_folios+0x188/0x220 [erofs] erofs_fscache_meta_readpage+0x106/0x160 [erofs] do_read_cache_folio+0x42a/0x590 ? bdi_register_va.part.14+0x1a7/0x210 ? super_setup_bdi_name+0x76/0xe0 erofs_bread+0x5b/0x170 [erofs] erofs_fc_fill_super+0x12b/0xc50 [erofs] This tracepoint uses rreq->inode, should set it when allocating. Fixes: d435d53228dd ("erofs: change to use asynchronous io for fscache readpage/readahead") Signed-off-by: Xin Yin Reviewed-by: Jeffle Xu Reviewed-by: Chao Yu Link: https://lore.kernel.org/r/20220527101800.22360-1-yinxin.x@bytedance.com Signed-off-by: Gao Xiang --- diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c index 7e44171..3552592 100644 --- a/fs/erofs/fscache.c +++ b/fs/erofs/fscache.c @@ -17,6 +17,7 @@ static struct netfs_io_request *erofs_fscache_alloc_request(struct address_space rreq->start = start; rreq->len = len; rreq->mapping = mapping; + rreq->inode = mapping->host; INIT_LIST_HEAD(&rreq->subrequests); refcount_set(&rreq->ref, 1); return rreq;