diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2014-03-02 19:36:41 +0000 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@linaro.org> | 2014-03-03 23:03:31 +0200 |
| commit | 76ca310a19463e9883e2e55a88ac8be1fc171eea (patch) | |
| tree | fc0a0e5c90094c920021d4204735865b692f94aa /linux-user | |
| parent | cd98d390ae009c5c1be5ae9a656e943bb47e14f0 (diff) | |
| download | qemu-76ca310a19463e9883e2e55a88ac8be1fc171eea.tar.gz | |
linux-user: Fix getresuid, getresgid if !USE_UID16
The size of the UID/GID types depends on whether USE_UID16 is
defined. Define a new put_user_id() which writes a uid/gid
type to guest memory. This fixes getresuid and getresgid, which
were always storing 16 bits even if the uid type was 32 bits.
Reported-by: Michael Matz <matz@suse.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'linux-user')
| -rw-r--r-- | linux-user/syscall.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 1407b7a546..ccdbc4e321 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -4528,6 +4528,9 @@ static inline int tswapid(int id) { return tswap16(id); } + +#define put_user_id(x, gaddr) put_user_u16(x, gaddr) + #else /* !USE_UID16 */ static inline int high2lowuid(int uid) { @@ -4549,6 +4552,9 @@ static inline int tswapid(int id) { return tswap32(id); } + +#define put_user_id(x, gaddr) put_user_u32(x, gaddr) + #endif /* USE_UID16 */ void syscall_init(void) @@ -7805,9 +7811,9 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, uid_t ruid, euid, suid; ret = get_errno(getresuid(&ruid, &euid, &suid)); if (!is_error(ret)) { - if (put_user_u16(high2lowuid(ruid), arg1) - || put_user_u16(high2lowuid(euid), arg2) - || put_user_u16(high2lowuid(suid), arg3)) + if (put_user_id(high2lowuid(ruid), arg1) + || put_user_id(high2lowuid(euid), arg2) + || put_user_id(high2lowuid(suid), arg3)) goto efault; } } @@ -7826,9 +7832,9 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, gid_t rgid, egid, sgid; ret = get_errno(getresgid(&rgid, &egid, &sgid)); if (!is_error(ret)) { - if (put_user_u16(high2lowgid(rgid), arg1) - || put_user_u16(high2lowgid(egid), arg2) - || put_user_u16(high2lowgid(sgid), arg3)) + if (put_user_id(high2lowgid(rgid), arg1) + || put_user_id(high2lowgid(egid), arg2) + || put_user_id(high2lowgid(sgid), arg3)) goto efault; } } |