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| author | Lorenzo Stoakes <lorenzo.stoakes@oracle.com> | 2024-12-07 00:52:29 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-12-19 06:04:42 +0300 |
| commit | 42c4e4b20d9c4651903c4afc53a4ff18b7451b3e (patch) | |
| tree | f082a9bd61542e14059ab30d12a59adbbcc20979 /tools/perf/scripts/python/task-analyzer.py | |
| parent | f5d09de9f1bf9674c6418ff10d0a40cfe29268e1 (diff) | |
| download | linux-42c4e4b20d9c4651903c4afc53a4ff18b7451b3e.tar.xz | |
mm: correctly reference merged VMA
On second merge attempt on mmap() we incorrectly discard the possibly
merged VMA, resulting in a possible use-after-free (and most certainly a
reference to the wrong VMA) in this instance in the subsequent
__mmap_complete() invocation.
Correct this mistake by reassigning vma correctly if a merge succeeds in
this case.
Link: https://lkml.kernel.org/r/20241206215229.244413-1-lorenzo.stoakes@oracle.com
Fixes: 5ac87a885aec ("mm: defer second attempt at merge on mmap()")
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Suggested-by: Jann Horn <jannh@google.com>
Reported-by: syzbot+91cf8da9401355f946c3@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/all/67536a25.050a0220.a30f1.0149.GAE@google.com/
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools/perf/scripts/python/task-analyzer.py')
0 files changed, 0 insertions, 0 deletions