* Re: CVE-2025-40128: btrfs: fix symbolic link reading when bs > ps [not found] <2025111253-CVE-2025-40128-2dd9@gregkh> @ 2025-11-13 10:40 ` David Sterba 2025-11-13 17:37 ` Greg Kroah-Hartman 0 siblings, 1 reply; 2+ messages in thread From: David Sterba @ 2025-11-13 10:40 UTC (permalink / raw) To: cve, linux-kernel; +Cc: linux-cve-announce, Greg Kroah-Hartman On Wed, Nov 12, 2025 at 07:24:04PM +0900, Greg Kroah-Hartman wrote: > From: Greg Kroah-Hartman <gregkh@kernel.org> > > Description > =========== > > In the Linux kernel, the following vulnerability has been resolved: > > btrfs: fix symbolic link reading when bs > ps > > [BUG DURING BS > PS TEST] > When running the following script on a btrfs whose block size is larger > than page size, e.g. 8K block size and 4K page size, it will trigger a > kernel BUG: > > # mkfs.btrfs -s 8k $dev > # mount $dev $mnt > # mkdir $mnt/dir > # ln -s dir $mnt/link > # ls $mnt/link Please drop the CVE status from this patch, the bs > ps (block size bigger than page size) feature requires CONFIG_BTRFS_EXPERIMENTAL and is unfinished and possibly unstable in other use cases. It does not make sense to improve security where none should be expected. ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: CVE-2025-40128: btrfs: fix symbolic link reading when bs > ps 2025-11-13 10:40 ` CVE-2025-40128: btrfs: fix symbolic link reading when bs > ps David Sterba @ 2025-11-13 17:37 ` Greg Kroah-Hartman 0 siblings, 0 replies; 2+ messages in thread From: Greg Kroah-Hartman @ 2025-11-13 17:37 UTC (permalink / raw) To: David Sterba; +Cc: cve, linux-kernel, linux-cve-announce On Thu, Nov 13, 2025 at 11:40:08AM +0100, David Sterba wrote: > On Wed, Nov 12, 2025 at 07:24:04PM +0900, Greg Kroah-Hartman wrote: > > From: Greg Kroah-Hartman <gregkh@kernel.org> > > > > Description > > =========== > > > > In the Linux kernel, the following vulnerability has been resolved: > > > > btrfs: fix symbolic link reading when bs > ps > > > > [BUG DURING BS > PS TEST] > > When running the following script on a btrfs whose block size is larger > > than page size, e.g. 8K block size and 4K page size, it will trigger a > > kernel BUG: > > > > # mkfs.btrfs -s 8k $dev > > # mount $dev $mnt > > # mkdir $mnt/dir > > # ln -s dir $mnt/link > > # ls $mnt/link > > Please drop the CVE status from this patch, the bs > ps (block size > bigger than page size) feature requires CONFIG_BTRFS_EXPERIMENTAL and is > unfinished and possibly unstable in other use cases. It does not make > sense to improve security where none should be expected. Oops, good catch, now rejected, thanks for the review! greg k-h ^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2025-11-13 17:37 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <2025111253-CVE-2025-40128-2dd9@gregkh>
2025-11-13 10:40 ` CVE-2025-40128: btrfs: fix symbolic link reading when bs > ps David Sterba
2025-11-13 17:37 ` Greg Kroah-Hartman
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®