On Tue, Jul 30, 2024 at 04:17:04AM +0900, Ryusuke Konishi wrote: > commit 4811f7af6090e8f5a398fbdd766f903ef6c0d787 upstream. > > Syzbot reported that a buffer state inconsistency was detected in > nilfs_btnode_create_block(), triggering a kernel bug. > > It is not appropriate to treat this inconsistency as a bug; it can occur > if the argument block address (the buffer index of the newly created > block) is a virtual block number and has been reallocated due to > corruption of the bitmap used to manage its allocation state. > > So, modify nilfs_btnode_create_block() and its callers to treat it as a > possible filesystem error, rather than triggering a kernel bug. > > Link: https://lkml.kernel.org/r/20240725052007.4562-1-konishi.ryusuke@xxxxxxxxx > Fixes: a60be987d45d ("nilfs2: B-tree node cache") > Signed-off-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxx> > Reported-by: syzbot+89cc4f2324ed37988b60@xxxxxxxxxxxxxxxxxxxxxxxxx > Closes: https://syzkaller.appspot.com/bug?extid=89cc4f2324ed37988b60 > Cc: <stable@xxxxxxxxxxxxxxx> > Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > --- > Please apply this patch to the stable trees indicated by the subject > prefix instead of the failed patches or the one I asked you to drop. > > This patch is tailored to take page/folio conversion into account and > can be applied from v4.11 to v6.7. > > Also, all the builds and tests I did on each stable tree passed. Now queued up, thanks. greg k-h
