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Date: Thu, 15 Oct 2020 10:52:48 -0400 From: "Theodore Y. Ts'o" <tytso@....edu> To: Jan Kara <jack@...e.cz> Cc: linux-ext4@...r.kernel.org, Ritesh Harjani <riteshh@...ux.ibm.com> Subject: Re: [PATCH] ext4: Detect already used quota file early On Tue, Oct 13, 2020 at 03:22:21PM +0200, Jan Kara wrote: > When we try to use file already used as a quota file again (for the same > or different quota type), strange things can happen. At the very least > lockdep annotations may be wrong but also inode flags may be wrongly set > / reset. When the file is used for two quota types at once we can even > corrupt the file and likely crash the kernel. Catch all these cases by > checking whether passed file is already used as quota file and bail > early in that case. > > This fixes occasional generic/219 failure due to lockdep complaint. > > Reported-by: Ritesh Harjani <riteshh@...ux.ibm.com> > Signed-off-by: Jan Kara <jack@...e.cz> Thanks, applied. - Ted
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