[LU-16333] page fault in osc_release_bounce_pages()

Fri, 27 Jan 2023 04:25:00 +0000

pga[i] can be uninitialized.It happens after following code pathin osc_build_rpc():

 OBD_SLAB_ALLOC_PTR_GFP(oa, osc_obdo_kmem, GFP_NOFS);
            if (oa == NULL)
                    GOTO(out, rc = -ENOMEM);

 #8 [ffffc90000d17838] osc_io_unplug0 at ffffffffa07d9eb9 [osc]
 #9 [ffffc90000d17918] osc_cache_writeback_range at ffffffffa07dfd6e [osc]
#10 [ffffc90000d179f0] osc_io_fsync_start at ffffffffa07cd0eb [osc]
#11 [ffffc90000d17a38] cl_io_start at ffffffffa0537981 [obdclass]
#12 [ffffc90000d17a68] lov_io_call at ffffffffa0823118 [lov]
#13 [ffffc90000d17aa0] lov_io_start at ffffffffa0823c06 [lov]
#14 [ffffc90000d17ac0] cl_io_start at ffffffffa0537981 [obdclass]
#15 [ffffc90000d17af0] cl_io_loop at ffffffffa053a988 [obdclass]
#16 [ffffc90000d17b30] cl_sync_file_range at ffffffffa09027e7 [lustre]
#17 [ffffc90000d17b80] ll_writepages at ffffffffa0925ff6 [lustre]
#18 [ffffc90000d17bb8] do_writepages at ffffffff811fc0db
#19 [ffffc90000d17c28] __writeback_single_inode at ffffffff812b6c89
#20 [ffffc90000d17c70] writeback_sb_inodes at ffffffff812b7144
#21 [ffffc90000d17d10] __writeback_inodes_wb at ffffffff812b73c7
#22 [ffffc90000d17d58] wb_writeback at ffffffff812b7675
#23 [ffffc90000d17de8] wb_workfn at ffffffff812b9c8a
#24 [ffffc90000d17e80] process_one_work at ffffffff8109ac98
#25 [ffffc90000d17ec8] worker_thread at ffffffff8109b887
#26 [ffffc90000d17f08] kthread at ffffffff810a25a0
#27 [ffffc90000d17f50] ret_from_fork at ffffffff8180021a

Whamcloud Community JIRA

[LU-16333] page fault in osc_release_bounce_pages()