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If another thread is holding target_fd_trans_lock during a fork,
then the lock becomes permanently locked in the child and the
emulator deadlocks at the next interaction with the fd-trans table.
As with other locks, acquire the lock in fork_start() and release
it in fork_end().
Cc: qemu-stable@nongnu.org
Signed-off-by: Geoffrey Thomas <geofft@ldpreload.com>
Fixes: c093364f4d91 "fd-trans: Fix race condition on reallocation of the translation table."
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2846
Buglink: https://github.com/astral-sh/uv/issues/6105
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250314124742.4965-1-geofft@ldpreload.com>
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When reading the expiration count from a timerfd, the endianness of the
64bit value read is the one of the host, just as for eventfds.
Signed-off-by: Mathis Marion <mathis.marion@silabs.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20230220085822.626798-2-Mathis.Marion@silabs.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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The mapping from file-descriptors to translator functions is not guarded
on realloc which may cause invalid function pointers to be read from a
previously deallocated mapping.
Signed-off-by: Owen Anderson <oanderso@google.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20210701221255.107976-1-oanderso@google.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
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This will ease to move out syscall functions from syscall.c
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20180823222215.13781-1-laurent@vivier.eu>
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