In the test-case of statfs from ltp-testsuite, it pass -1 to 2th argument. eg: fstatfs(fd , -1) When uclibc-ng parse the buf32 to buf will cause illegal address access, the kernel will signal the process with SIGSEV. If we pass the -1 directly to the syscall of statfs/fstatfs, kenrel use copy_to_user() to prevent the singal of SIGSEV and just return EVINAL. This is the ltp-testsuite expect. Signed-off-by: Guo Ren &lt;ren_guo(a)c-sky.com&gt; --- libc/misc/statfs/fstatfs64.c | 4 +++- libc/misc/statfs/statfs64.c | 4 +++- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/libc/misc/statfs/fstatfs64.c b/libc/misc/statfs/fstatfs64.c index 7221a0b..bb9ca30 100644 --- a/libc/misc/statfs/fstatfs64.c +++ b/libc/misc/statfs/fstatfs64.c @@ -33,9 +33,11 @@ int fstatfs64 (int fd, struct statfs64 *buf) { struct statfs buf32; - if (__libc_fstatfs (fd, &buf32) < 0) + if (__libc_fstatfs (fd, (struct statfs *)buf) < 0) return -1; + buf32 = *(struct statfs *)buf; + buf->f_type = buf32.f_type; buf->f_bsize = buf32.f_bsize; buf->f_blocks = buf32.f_blocks; diff --git a/libc/misc/statfs/statfs64.c b/libc/misc/statfs/statfs64.c index b1a33b7..7317870 100644 --- a/libc/misc/statfs/statfs64.c +++ b/libc/misc/statfs/statfs64.c @@ -31,9 +31,11 @@ int statfs64 (const char *file, struct statfs64 *buf) { struct statfs buf32; - if (__libc_statfs (file, &buf32) < 0) + if (__libc_statfs (file, (struct statfs *)buf) < 0) return -1; + buf32 = *(struct statfs *)buf; + buf->f_type = buf32.f_type; buf->f_bsize = buf32.f_bsize; buf->f_blocks = buf32.f_blocks; -- 2.7.4