On Thu, Jul 10, 2025 at 01:01:04AM -0700, Moon Hee Lee wrote: > From 4c910ac989e7a6d97565a67677a1ee88e2d1a9ad Mon Sep 17 00:00:00 2001 > From: Moon Hee Lee <moonhee.lee.ca@xxxxxxxxx> > Date: Thu, 10 Jul 2025 00:36:59 -0700 > Subject: [PATCH] ext4: bail out when INLINE_DATA_FL lacks system.data xattr > > A syzbot fuzzed image triggered a BUG_ON in ext4_update_inline_data() > when an inode had the INLINE_DATA_FL flag set but was missing the > system.data extended attribute. > > ext4_prepare_inline_data() now checks for the presence of that xattr > and returns -EFSCORRUPTED if it is missing, preventing corrupted inodes > from reaching the update path and triggering a crash. Thanks ofor the patch! However, instead of doing an xattr lookup in ext4_prepare_inline_data(), we can more simply and more efficiently just not BUG in ext4_update_inline_data, like this:
