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| author | Dan Carpenter <dan.carpenter@linaro.org> | 2024-11-14 09:59:32 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-11-15 07:43:48 +0100 |
| commit | 669b0cb81e4e4e78cff77a5b367c7f70c0c6c05e (patch) | |
| tree | d4dd283a7330b0a37d9a447f25fbba0d0bd330f5 /Documentation/ABI/stable/sysfs-block | |
| parent | sched/task_stack: fix object_is_on_stack() for KASAN tagged pointers (diff) | |
| download | linux-669b0cb81e4e4e78cff77a5b367c7f70c0c6c05e.tar.xz linux-669b0cb81e4e4e78cff77a5b367c7f70c0c6c05e.zip | |
fs/proc/task_mmu: prevent integer overflow in pagemap_scan_get_args()
The "arg->vec_len" variable is a u64 that comes from the user at the start
of the function. The "arg->vec_len * sizeof(struct page_region))"
multiplication can lead to integer wrapping. Use size_mul() to avoid
that.
Also the size_add/mul() functions work on unsigned long so for 32bit
systems we need to ensure that "arg->vec_len" fits in an unsigned long.
Link: https://lkml.kernel.org/r/39d41335-dd4d-48ed-8a7f-402c57d8ea84@stanley.mountain
Fixes: 52526ca7fdb9 ("fs/proc/task_mmu: implement IOCTL to get and optionally clear info about PTEs")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Cc: Andrei Vagin <avagin@google.com>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions