Messages in this thread | | | From | shankarapailoor <> | Date | Tue, 29 May 2018 10:32:35 -0700 | Subject | BUG in mm/page-writeback.c:2652 |
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Hi,
I am fuzzing linux 4.17-rc4 with BTRFS and I encountered a BUG in mm/page-writeback.c error described below. This bug has occured 3 times in our fuzzing campaign.
Here is the full stack trace: https://pastebin.com/QcDi9xA2
Truncated Stack Trace: https://pastebin.com/GWRNmhmC
Here is a C reproducer: https://pastebin.com/xTAVB3L2
My linux configs: https://pastebin.com/6J1KMczH
It appears that there is a fault injection inside of create_io_em during the slab allocation for the path. After that extent_clear_unlock_delalloc gets called. I don't know if the extent_map start and end are well defined in this case.
Regards, Shankara Pailoor
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