Michael Trapp [Mon, 20 Jun 2022 15:10:36 +0000 (17:10 +0200)]
[PATCH 02/24] libuuid: Implement continuous clock handling for time based UUIDs
In a uuidd setup, the daemon is a singleton and can maintain it's own
resources for time based UUID generation. This requires a dedicated
'clock sequence range' but does not need any further lock/update of
the LIBUUID_CLOCK_FILE from uuidd. The range of available clock values
is extended by a continuous handling of the clock updates - instead of
updating the value to the current timestamp, it is incremented by
the number of requested UUIDs.
Gbp-Pq: Topic upstream
Gbp-Pq: Name 0002-libuuid-Implement-continuous-clock-handling-for-time.patch
Petr Štetiar [Thu, 22 Sep 2022 09:49:13 +0000 (11:49 +0200)]
[PATCH 01/24] lib/path: ul_path_cpuparse: fix parsing of empty sysfs files
Kernel 5.15 returns empty content for topology/thread_siblings on
aarch64 platform, which in conjunction of uninitialized `buf` memory
buffer results in the garbage:
(gdb) p buf
$14 = " @\377\367\177\000\000\000\275\000\347j\032\236"
This garbage is then being later consumed by underlying helper functions
like for example cpumask_parse() and this leads to the following crash
later:
in __libc_free (p=0x7ff7f67c00) at src/malloc/mallocng/free.c:105
in free (p=<optimized out>) at src/malloc/free.c:5
in add_cpuset_to_array (setsize=<optimized out>, set=<optimized out>, items=<optimized out>, ary=<optimized out>) at ../sys-utils/lscpu-topology.c:29
in cputype_read_topology (cxt=cxt@entry=0x7ff7fffe70, ct=0x4298a0) at ../sys-utils/lscpu-topology.c:153
in lscpu_read_topology (cxt=cxt@entry=0x7ff7fffe70) at ../sys-utils/lscpu-topology.c:629
in main (argc=1, argv=0x7ffffffdb8) at ../sys-utils/lscpu.c:1341
It looks like the problem is that current logic expects fgets() to set
errno on failure, but fgets() is not documented to do so and and neither
glibc nor musl set errno. So if errno was set to 0 before fgets() call,
the failure from fgets() is ignored and then invalid buffer is being
parsed.
Fixes: #1810 Suggested-by: Thomas Weißschuh <thomas@t-8ch.de> Signed-off-by: Petr Štetiar <ynezz@true.cz>
Gbp-Pq: Topic upstream
Gbp-Pq: Name 0001-lib-path-ul_path_cpuparse-fix-parsing-of-empty-sysfs.patch