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man-generator: initialize struct stat to avoid MSAN error

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When building lvm2 in Gentoo/ChromeOS with the ASAN memory
sanitizer enabled, man-generator fails with the following
error. Initializing makes the error go away.

* SUMMARY: MemorySanitizer: use-of-uninitialized-value /build/amd64-generic/tmp/portage/sys-fs/lvm2-2.02.187-r3/work/LVM2.2.02.187/tools/man-generator.c:3316:6 in _include_description_file
* Exiting
* ASAN error detected:
* ==2548047==WARNING: MemorySanitizer: use-of-uninitialized-value
*     #0 0x558b00ab4730 in _include_description_file /build/amd64-generic/tmp/portage/sys-fs/lvm2-2.02.187-r3/work/LVM2.2.02.187/tools/man-generator.c:3316:6
*     #1 0x558b00ab4730 in _print_man /build/amd64-generic/tmp/portage/sys-fs/lvm2-2.02.187-r3/work/LVM2.2.02.187/tools/man-generator.c:3426:21
*     #2 0x558b00ab4730 in main /build/amd64-generic/tmp/portage/sys-fs/lvm2-2.02.187-r3/work/LVM2.2.02.187/tools/man-generator.c:3570:7
*     #0 0x7fa9b2cbb807 in find_derivation /var/tmp/portage/cross-x86_64-cros-linux-gnu/glibc-2.33-r8/work/glibc-2.33/iconv/gconv_db.c:583:15
*     #1 0x558b00a29559 in ?? ??:0
*
*   Uninitialized value was created by an allocation of 'statbuf.i.i' in the stack frame of function 'main'
*     #0 0x558b00ab1d4d in main /build/amd64-generic/tmp/portage/sys-fs/lvm2-2.02.187-r3/work/LVM2.2.02.187/tools/man-generator.c:3505
This commit is contained in:
Adrian Ratiu 2021-09-09 17:51:47 +03:00 committed by Zdenek Kabelac
parent 064979dc32
commit cd897e536f
1 changed files with 1 additions and 1 deletions
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2
tools/command.c
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@ -3526,7 +3526,7 @@ static int _include_description_file(char *name, char *des_file)
char *buf; char *buf;
int fd, r = 0; int fd, r = 0;
ssize_t sz; ssize_t sz;
struct stat statbuf; struct stat statbuf = { 0 };
if ((fd = open(des_file, O_RDONLY)) < 0) { if ((fd = open(des_file, O_RDONLY)) < 0) {
log_error("Failed to open description file %s.", des_file); log_error("Failed to open description file %s.", des_file);