[SRU][Focal, hwe-5.8][PATCH 0/2] CVE-2019-19449

[Stefan Bader]

On 30.09.21 20:32, Luke Nowakowski-Krijger wrote:
> Yes this is for both focal:linux and focal:linux-hwe-5.8. I knew that it would 
> be a bit ambiguous so I put the comma instead of the slash but I can see that 
> did not help at all. In the future is it just better to separate them like 
> [F][F/hwe-5.8]? At least that is unambiguous :)

True. Either that or anything duplicating the series. More or less [F] alone is 
just an abbreviation for focal:linux (because nobody like to type that much). so 
there probably are plenty options:

F:linux,linux-hwe-5.8
focal, focal:hwe-5.8
F,F/HWE-5.8
...

-Stefan
> 
> - Luke
> 
> On Thu, Sep 30, 2021 at 1:39 AM Stefan Bader <stefan.bader at canonical.com 
> <mailto:stefan.bader at canonical.com>> wrote:
> 
>     On 30.09.21 01:57, Luke Nowakowski-Krijger wrote:
>      > [Impact]
>      > 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
>      > (https://syzkaller.appspot.com/x/repro.c?x=102fbac5900000
>     <https://syzkaller.appspot.com/x/repro.c?x=102fbac5900000>)
>      > 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(-)
>      >
>     Double checking because in that combination it is not fully clear:
> 
>     this is for focal:linux AND focal:linux-hwe-5.8?
> 
>     -Stefan
> 


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