Re: [PATCH] ext4: fix crash when ext4_ext_insert_extent() returns error

[Wang Jun]

Hi,

This patch fixes a NULL/error pointer dereference issue that I triggered
and verified on the v6.6.142 kernel using syzkaller.

Based on this, I believe this fix should be backported to the **v6.6.y**
stable kernel series.

For other currently supported stable series (e.g., v6.1.y, v5.15.y,
v5.10.y, etc.), I have not yet verified if they contain the same
vulnerable code path. It would be prudent to check and potentially
backport the fix there as well, if applicable.

Please let me know if you need any further information or testing.

Thanks,
Wang Jun