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| author | Catalin Marinas <catalin.marinas@arm.com> | 2015-02-23 15:13:40 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2015-02-27 18:05:56 +0000 |
| commit | 9d42d48a342aee208c1154696196497fdc556bbf (patch) | |
| tree | 6984daeb050a874f4e4e96eb1093c2ed2e3de69f /kernel/gcov/Kconfig | |
| parent | a1e50a82256ed2f1312e70c52a84323e2e378f49 (diff) | |
| download | linux-9d42d48a342aee208c1154696196497fdc556bbf.tar.bz2 | |
arm64: compat Fix siginfo_t -> compat_siginfo_t conversion on big endian
The native (64-bit) sigval_t union contains sival_int (32-bit) and
sival_ptr (64-bit). When a compat application invokes a syscall that
takes a sigval_t value (as part of a larger structure, e.g.
compat_sys_mq_notify, compat_sys_timer_create), the compat_sigval_t
union is converted to the native sigval_t with sival_int overlapping
with either the least or the most significant half of sival_ptr,
depending on endianness. When the corresponding signal is delivered to a
compat application, on big endian the current (compat_uptr_t)sival_ptr
cast always returns 0 since sival_int corresponds to the top part of
sival_ptr. This patch fixes copy_siginfo_to_user32() so that sival_int
is copied to the compat_siginfo_t structure.
Cc: <stable@vger.kernel.org>
Reported-by: Bamvor Jian Zhang <bamvor.zhangjian@huawei.com>
Tested-by: Bamvor Jian Zhang <bamvor.zhangjian@huawei.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'kernel/gcov/Kconfig')
0 files changed, 0 insertions, 0 deletions