Hi Geoff, Geoff Levand wrote, > Hi, > > I experienced seg faults due to stack corruption when > calling statfs() with an automatic struct statfs variable. > > It seems there is a mismatch between the struct statfs used > by libc and that used by the arm64 kernel. The call to > statfs() writes 120 bytes, but struct statfs is only 88 > bytes. The attached test program shows this. > > Building for arm64. > libuClibc-1.0.30 > kernel: Linux-4.17.3 > > Comparing these files: > > > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/tree/include/uapi/asm-generic/statfs.h?h=v4.17.3#n23 > > https://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/tree/libc/sysdeps/linux/common-generic/bits/statfs.h?h=v1.0.30#n16 > > I see for the kernel all fields of struct statfs except f_fsid are the > same length at 64 bits for arm64, and that gives 120 bytes. That differs > from the libc version which has some 32 bit fields.
Do you have a patch in mind fixing this difference? best regards Waldemar _______________________________________________ devel mailing list devel@uclibc-ng.org https://mailman.uclibc-ng.org/cgi-bin/mailman/listinfo/devel
