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| author | Richard Henderson <richard.henderson@linaro.org> | 2023-06-29 10:08:35 +0200 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-07-01 08:33:08 +0200 |
| commit | 605a8b5491a119a2a6efbf61e5a38f9374645990 (patch) | |
| tree | 4333862526cf2bee112cf3b226b2cbb013acfc9a /fsdev/qemu-fsdev.c | |
| parent | 6ab1790226bcf55e6b3cdff1d0253c90d63de69f (diff) | |
| download | focaccia-qemu-605a8b5491a119a2a6efbf61e5a38f9374645990.tar.gz focaccia-qemu-605a8b5491a119a2a6efbf61e5a38f9374645990.zip | |
linux-user: Avoid mmap of the last byte of the reserved_va
There is an overflow problem in mmap_find_vma_reserved:
when reserved_va == UINT32_MAX, end may overflow to 0.
Rather than a larger rewrite at this time, simply avoid
the final byte of the VA, which avoids searching the
final page, which avoids the overflow.
Cc: qemu-stable@nongnu.org
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1741
Fixes: 95059f9c ("include/exec: Change reserved_va semantics to last byte")
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Message-Id: <20230629080835.71371-1-richard.henderson@linaro.org>
Diffstat (limited to 'fsdev/qemu-fsdev.c')
0 files changed, 0 insertions, 0 deletions