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| author |   Eric Biggers <ebiggers@google.com> | 2018-02-06 15:41:56 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2018-02-06 18:32:47 -0800 |
| commit | 9903a91c763ecdae333a04a9d89d79d2b8966503 (patch) | |
| tree | 62181e45190b53365475094bc2dd66ec9ad415b4 /kernel | |
| parent | pipe: actually allow root to exceed the pipe buffer limits (diff) | |
| download | linux-dev-9903a91c763ecdae333a04a9d89d79d2b8966503.tar.xz linux-dev-9903a91c763ecdae333a04a9d89d79d2b8966503.zip | |
pipe: fix off-by-one error when checking buffer limits
With pipe-user-pages-hard set to 'N', users were actually only allowed up
to 'N - 1' buffers; and likewise for pipe-user-pages-soft.
Fix this to allow up to 'N' buffers, as would be expected.
Link: http://lkml.kernel.org/r/20180111052902.14409-5-ebiggers3@gmail.com
Fixes: b0b91d18e2e9 ("pipe: fix limit checking in pipe_set_size()")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Willy Tarreau <w@1wt.eu>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: "Luis R . Rodriguez" <mcgrof@kernel.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Mikulas Patocka <mpatocka@redhat.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 'kernel')
0 files changed, 0 insertions, 0 deletions