Messages in this thread |  | | From | Jia-Ju Bai <> | Subject | [BUG] mm: truncate: a possible sleep-in-atomic-context bug in truncate_exceptional_pvec_entries() | Date | Mon, 13 Aug 2018 11:10:23 +0800 |
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The kernel may sleep with holding a spinlock.
The function call paths (from bottom to top) in Linux-4.16 are:
[FUNC] schedule fs/dax.c, 259: schedule in get_unlocked_mapping_entry fs/dax.c, 450: get_unlocked_mapping_entry in __dax_invalidate_mapping_entry fs/dax.c, 471: __dax_invalidate_mapping_entry in dax_delete_mapping_entry mm/truncate.c, 97: dax_delete_mapping_entry in truncate_exceptional_pvec_entries mm/truncate.c, 82: spin_lock_irq in truncate_exceptional_pvec_entries
I do not find a good way to fix, so I only report. This is found by my static analysis tool (DSAC).
Thanks, Jia-Ju Bai
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