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Groups > linux.kernel > #1446689
| From | Al Viro <viro@ZenIV.linux.org.uk> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: 4.7-rc7: use-after-free in proc_map_files_readdir |
| Date | 2016-07-19 21:40 +0200 |
| Message-ID | <rWJ22-86v-9@gated-at.bofh.it> (permalink) |
| References | <rWBea-3l1-11@gated-at.bofh.it> <rWFhM-5LH-23@gated-at.bofh.it> <rWG4a-6iH-21@gated-at.bofh.it> <rWI5Y-7uZ-23@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Tue, Jul 19, 2016 at 02:33:27PM -0400, Dave Jones wrote:
> > Could you dump the relevant part of vmlinux objdump, rather than whatever
> > you've used on base.o? Having relocations resolved makes it much easier
> > to figure out... Or just dump that vmlinux on anonftp somewhere...
>
> http://codemonkey.org.uk/junk/vmlinux.gz
OK, it's actually about fetching ->f_mode in
info.mode = vma->vm_file->f_mode;
%r15 points contains vma->vm_file at that point, and 0x84 is the offset of
f_mode in struct file on your config from hell (due to spinlock_t size
exploding on lockdep et.al.)
Interesting... Do you have a reproducer for that?
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Re: 4.7-rc7: use-after-free in proc_map_files_readdir Alexey Dobriyan <adobriyan@gmail.com> - 2016-07-19 13:20 +0200
Re: 4.7-rc7: use-after-free in proc_map_files_readdir Dave Jones <davej@codemonkey.org.uk> - 2016-07-19 17:40 +0200
Re: 4.7-rc7: use-after-free in proc_map_files_readdir Al Viro <viro@ZenIV.linux.org.uk> - 2016-07-19 18:30 +0200
Re: 4.7-rc7: use-after-free in proc_map_files_readdir Dave Jones <davej@codemonkey.org.uk> - 2016-07-19 20:40 +0200
Re: 4.7-rc7: use-after-free in proc_map_files_readdir Al Viro <viro@ZenIV.linux.org.uk> - 2016-07-19 21:40 +0200
Re: 4.7-rc7: use-after-free in proc_map_files_readdir Dave Jones <davej@codemonkey.org.uk> - 2016-07-19 21:50 +0200
Re: 4.7-rc7: use-after-free in proc_map_files_readdir Dave Jones <davej@codemonkey.org.uk> - 2016-07-20 15:20 +0200
Re: 4.7-rc7: use-after-free in proc_map_files_readdir Alexey Dobriyan <adobriyan@gmail.com> - 2016-07-19 21:30 +0200
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