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Groups > linux.kernel > #1496894
| From | Al Viro <viro@ZenIV.linux.org.uk> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH] Revert "debugfs: ->d_parent is never NULL or negative" |
| Date | 2016-10-07 00:50 +0200 |
| Message-ID | <sppEd-7qB-3@gated-at.bofh.it> (permalink) |
| References | <spoyt-6y4-7@gated-at.bofh.it> <spoyt-6y4-5@gated-at.bofh.it> <spoI9-6CY-17@gated-at.bofh.it> <spp1v-72A-25@gated-at.bofh.it> <sppuy-7lV-17@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, Oct 06, 2016 at 11:37:29PM +0100, Al Viro wrote: > If you ever get NULL in ->d_parent of struct dentry instance, you are > practically certain to have a dangling pointer to memory that used to > contain a struct dentry at some point but got freed and reused since then. ... which is what happens in your case, apparently. ->stats is still pointing to a dentry that had just been freed and its memory reused.
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Re: [PATCH] Revert "debugfs: ->d_parent is never NULL or negative" Al Viro <viro@ZenIV.linux.org.uk> - 2016-10-06 23:40 +0200
Re: [PATCH] Revert "debugfs: ->d_parent is never NULL or negative" Sinan Kaya <okaya@codeaurora.org> - 2016-10-06 23:50 +0200
Re: [PATCH] Revert "debugfs: ->d_parent is never NULL or negative" Sinan Kaya <okaya@codeaurora.org> - 2016-10-07 00:00 +0200
Re: [PATCH] Revert "debugfs: ->d_parent is never NULL or negative" Sinan Kaya <okaya@codeaurora.org> - 2016-10-07 00:20 +0200
Re: [PATCH] Revert "debugfs: ->d_parent is never NULL or negative" Al Viro <viro@ZenIV.linux.org.uk> - 2016-10-07 00:10 +0200
Re: [PATCH] Revert "debugfs: ->d_parent is never NULL or negative" Al Viro <viro@ZenIV.linux.org.uk> - 2016-10-07 00:40 +0200
Re: [PATCH] Revert "debugfs: ->d_parent is never NULL or negative" Al Viro <viro@ZenIV.linux.org.uk> - 2016-10-07 00:50 +0200
Re: [PATCH] Revert "debugfs: ->d_parent is never NULL or negative" Sinan Kaya <okaya@codeaurora.org> - 2016-10-07 01:30 +0200
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