* Creating written extents beyond EOF @ 2022-09-01 13:25 Chandan Babu R 2022-09-02 21:55 ` Dave Chinner 0 siblings, 1 reply; 3+ messages in thread From: Chandan Babu R @ 2022-09-01 13:25 UTC (permalink / raw) To: Dave Chinner; +Cc: linux-xfs Hi Dave, 7684e2c4384d5d1f884b01ab8bff2369e4db0bff (https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7684e2c4384d5d1f884b01ab8bff2369e4db0bff) is one of the commits that needs to be backported to 5.4.y stable kernel. The commit message mentions that we could have written extents beyond EOF. I am unable to come up with a sequence of commands that could create such extents. Can you please explain how a user could create a file having written extents beyond EOF? -- chandan ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Creating written extents beyond EOF 2022-09-01 13:25 Creating written extents beyond EOF Chandan Babu R @ 2022-09-02 21:55 ` Dave Chinner 2022-09-06 6:55 ` Chandan Babu R 0 siblings, 1 reply; 3+ messages in thread From: Dave Chinner @ 2022-09-02 21:55 UTC (permalink / raw) To: Chandan Babu R; +Cc: linux-xfs On Thu, Sep 01, 2022 at 06:55:31PM +0530, Chandan Babu R wrote: > Hi Dave, > > 7684e2c4384d5d1f884b01ab8bff2369e4db0bff > (https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7684e2c4384d5d1f884b01ab8bff2369e4db0bff) > is one of the commits that needs to be backported to 5.4.y stable kernel. > > The commit message mentions that we could have written extents beyond EOF. I > am unable to come up with a sequence of commands that could create such > extents. > > Can you please explain how a user could create a file having written extents > beyond EOF? That bug fix was committed in v5.5. We didn't convert delalloc to use unwritten extents until v5.8 via commit a5949d3faedf. -Dave. -- Dave Chinner david@fromorbit.com ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Creating written extents beyond EOF 2022-09-02 21:55 ` Dave Chinner @ 2022-09-06 6:55 ` Chandan Babu R 0 siblings, 0 replies; 3+ messages in thread From: Chandan Babu R @ 2022-09-06 6:55 UTC (permalink / raw) To: Dave Chinner; +Cc: linux-xfs On Sat, Sep 03, 2022 at 07:55:16 AM +1000, Dave Chinner wrote: > On Thu, Sep 01, 2022 at 06:55:31PM +0530, Chandan Babu R wrote: >> Hi Dave, >> >> 7684e2c4384d5d1f884b01ab8bff2369e4db0bff >> (https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7684e2c4384d5d1f884b01ab8bff2369e4db0bff) >> is one of the commits that needs to be backported to 5.4.y stable kernel. >> >> The commit message mentions that we could have written extents beyond EOF. I >> am unable to come up with a sequence of commands that could create such >> extents. >> >> Can you please explain how a user could create a file having written extents >> beyond EOF? > > That bug fix was committed in v5.5. We didn't convert delalloc to > use unwritten extents until v5.8 via commit a5949d3faedf. > Ok. Thanks for clarifying my doubt. I can now recreate the bug on my test machine when running v5.4 LTS kernel. -- chandan ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-09-06 6:56 UTC | newest] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2022-09-01 13:25 Creating written extents beyond EOF Chandan Babu R 2022-09-02 21:55 ` Dave Chinner 2022-09-06 6:55 ` Chandan Babu R
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