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Issue of the Implementation # F0011

Brief

ext4: When mounted with backup superblock online resize leads to BUG_ON or causes filesystem corruption

Detailed Description

If ext4 is mounted using option '-o sb=<n>', then online resize using resize2fs leads to BUG_ON or causes filesystem corruption.

Reproducing

mkfs.ext4 /dev/vdc 100M
mount -t ext4 -o sb=40961 /dev/vdc /vdc
resize2fs /dev/vdc

Component

linux-kernel 3.18

Accepted

http://www.spinics.net/lists/linux-ext4/msg46743.html
commit

Status

Fixed in kernel 3.19-rc4

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