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| author | Pavel Tatashin <pasha.tatashin@oracle.com> | 2018-07-04 02:02:53 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-07-04 02:32:19 +0200 |
| commit | fc36def997cfd6cbff3eda4f82853a5c311c5466 (patch) | |
| tree | 30bcbc53d846d0af57df66256968458590cb7cd7 /lib/iov_iter.c | |
| parent | ARM: disable KCOV for trusted foundations code (diff) | |
| download | linux-fc36def997cfd6cbff3eda4f82853a5c311c5466.tar.xz linux-fc36def997cfd6cbff3eda4f82853a5c311c5466.zip | |
mm: teach dump_page() to correctly output poisoned struct pages
If struct page is poisoned, and uninitialized access is detected via
PF_POISONED_CHECK(page) dump_page() is called to output the page. But,
the dump_page() itself accesses struct page to determine how to print
it, and therefore gets into a recursive loop.
For example:
dump_page()
__dump_page()
PageSlab(page)
PF_POISONED_CHECK(page)
VM_BUG_ON_PGFLAGS(PagePoisoned(page), page)
dump_page() recursion loop.
Link: http://lkml.kernel.org/r/20180702180536.2552-1-pasha.tatashin@oracle.com
Fixes: f165b378bbdf ("mm: uninitialized struct page poisoning sanity checking")
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/iov_iter.c')
0 files changed, 0 insertions, 0 deletions