[PATCH] btrfs: raid56: data corruption on a device removal

I found that RAID5 or RAID6 filesystem might be got corrupted in the following scenario: 1. Create 4 disks RAID6 filesystem 2. Preallocate 16 10Gb files 3. Run fio: 'fio --name=testload --directory=./ --size=10G --numjobs=16 --bs=64k --iodepth=64 --rw=randrw --verify=sha256 --time_based --runtim

[PATCH v2] btrfs: raid56: data corruption on a device removal

' value. Looks like this is a quite rare condition. Subsequently, in the raid_rmw_end_io handler that failed bio can be translated to a wrong stripe number and fail wrong rbio. Reviewed-by: Johannes Thumshirn Signed-off-by: Dmitriy Gorokh --- fs/btrfs/raid56.c | 6 ++ 1 file changed, 6 i

[PATCH] Fix NULL pointer exception in find_bio_stripe()

On detaching of a disk which is a part of a RAID6 filesystem, the following kernel OOPS may happen: [63122.680461] BTRFS error (device sdo): bdev /dev/sdo errs: wr 0, rd 0, flush 1, corrupt 0, gen 0 [63122.719584] BTRFS warning (device sdo): lost page write due to IO error on /dev/sdo [63122.