APPLIED[focal:hwe-5.8]: [SRU][Focal, hwe-5.8][PATCH 0/2] CVE-2019-19449
stefan.bader at canonical.com
Mon Oct 4 15:17:14 UTC 2021
On 30.09.21 01:57, Luke Nowakowski-Krijger wrote:
> Mounting a crafted f2fs file system with a segment count in a section
> that is less than segs_per_sec causes out-of-boundary memory access
> during fs initalization.
> [Test case]
> Reproduced bug with syzbot reproducer
> with slight modification to target a valid loop device.
> Confirmed that after the patches were applied the fs reports that there
> are malformed segments/sections and mounting the file system fails,
> which stops the initialization from continuing and preventing the
> out-of-boundary memory access.
> [Potential regression]
> The patches add checks that are a superset of the previous checks, which
> might cause some filesystems that succeeded in mounting to now fail.
> Chao Yu (1):
> f2fs: fix to do sanity check on segment/section count
> Wang Xiaojun (1):
> f2fs: fix wrong total_sections check and fsmeta check
> fs/f2fs/segment.h | 1 +
> fs/f2fs/super.c | 14 ++++++++++----
> 2 files changed, 11 insertions(+), 4 deletions(-)
Applied to focal:linux-hwe-5.8/hwe-5.8. Thanks.
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