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b6abbe6250
target_rlimit64 contains uint64_t fields, so it's 8-byte aligned on
some hosts, while some guests may align their respective type on a
4-byte boundary. This may lead to an unaligned access, which is an UB.
Fix by defining the fields as abi_ullong. This makes the host alignment
match that of the guest, and lets the compiler know that it should emit
code that can deal with the guest alignment.
While at it, also use __get_user() and __put_user() instead of
tswap64().
Fixes: 163a05a839 ("linux-user: Implement prlimit64 syscall")
Reported-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20230224003907.263914-2-iii@linux.ibm.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
(cherry picked from commit 9c1da8b5ee7f6e80e6b683e7fb73df1029a7cbbe)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
/*
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* Target definitions of RLIMIT_* constants. These may be overridden by an
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* architecture specific header if needed.
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*/
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#ifndef GENERIC_TARGET_RESOURCE_H
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#define GENERIC_TARGET_RESOURCE_H
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struct target_rlimit {
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abi_ulong rlim_cur;
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abi_ulong rlim_max;
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};
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struct target_rlimit64 {
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abi_ullong rlim_cur;
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abi_ullong rlim_max;
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};
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#define TARGET_RLIM_INFINITY ((abi_ulong)-1)
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#define TARGET_RLIMIT_CPU 0
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#define TARGET_RLIMIT_FSIZE 1
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#define TARGET_RLIMIT_DATA 2
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#define TARGET_RLIMIT_STACK 3
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#define TARGET_RLIMIT_CORE 4
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#define TARGET_RLIMIT_RSS 5
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#define TARGET_RLIMIT_NPROC 6
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#define TARGET_RLIMIT_NOFILE 7
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#define TARGET_RLIMIT_MEMLOCK 8
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#define TARGET_RLIMIT_AS 9
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#define TARGET_RLIMIT_LOCKS 10
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#define TARGET_RLIMIT_SIGPENDING 11
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#define TARGET_RLIMIT_MSGQUEUE 12
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#define TARGET_RLIMIT_NICE 13
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#define TARGET_RLIMIT_RTPRIO 14
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#define TARGET_RLIMIT_RTTIME 15
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#endif
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