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I'm getting the following error under valgrind:
==305970== Invalid free() / delete / delete[] / realloc()
==305970== at 0x483E9F1: free (vg_replace_malloc.c:538)
==305970== by 0x4012CD: mfree (alloc-util.h:48)
==305970== by 0x4012EF: freep (alloc-util.h:83)
==305970== by 0x4017F4: LLVMFuzzerTestOneInput (fuzz-bus-match.c:58)
==305970== by 0x401A58: main (fuzz-main.c:39)
==305970== Address 0x59972f0 is 0 bytes inside a block of size 8,192 free'd
==305970== at 0x483FCE4: realloc (vg_replace_malloc.c:834)
==305970== by 0x4C986F7: _IO_mem_finish (in /usr/lib64/libc-2.33.so)
==305970== by 0x4C8F5E0: fclose@@GLIBC_2.2.5 (in /usr/lib64/libc-2.33.so)
==305970== by 0x49D2CDB: fclose_nointr (fd-util.c:108)
==305970== by 0x49D2D3D: safe_fclose (fd-util.c:124)
==305970== by 0x4A4BCCC: fclosep (fd-util.h:41)
==305970== by 0x4A4E00F: bus_match_to_string (bus-match.c:859)
==305970== by 0x4016C2: LLVMFuzzerTestOneInput (fuzz-bus-match.c:58)
==305970== by 0x401A58: main (fuzz-main.c:39)
==305970== Block was alloc'd at
==305970== at 0x483FAE5: calloc (vg_replace_malloc.c:760)
==305970== by 0x4C98787: open_memstream (in /usr/lib64/libc-2.33.so)
==305970== by 0x49D56D6: open_memstream_unlocked (fileio.c:97)
==305970== by 0x4A4DEC5: bus_match_to_string (bus-match.c:859)
==305970== by 0x4016C2: LLVMFuzzerTestOneInput (fuzz-bus-match.c:58)
==305970== by 0x401A58: main (fuzz-main.c:39)
==305970==
So the fclose() which is called from _cleanup_fclose_ clearly reallocates the
buffer (maybe to save memory?). open_memstream(3) says:
The locations referred to by these pointers are updated each time the
stream is flushed (fflush(3)) and when the stream is closed (fclose(3)).
This seems to mean that we should close the stream first before grabbing the
buffer pointer.
In PR #17431 we have introduced retry loop in link_update() in order to
maximize the chance that we end up with correct target when there are
multiple contenders for given symlink.
Number of iterations in retry loop is either 1 or
LINK_UPDATE_MAX_RETRIES, depending on the value of 'initialized' db
flag. When device appears for the first time we need to set the
flag before calling link_update() via update_devnode() for the second
time to make sure we run the second invocation with higher retry loop
counter.
When running integration tests under sanitizers D-Bus fails to
shutdown cleanly, causing unnecessary noise in the logs:
```
dbus-daemon[272]: ==272==LeakSanitizer has encountered a fatal error.
dbus-daemon[272]: ==272==HINT: For debugging, try setting environment variable LSAN_OPTIONS=verbosity=1:log_threads=1
dbus-daemon[272]: ==272==HINT: LeakSanitizer does not work under ptrace (strace, gdb, etc)
```
Since we're not "sanitizing" D-Bus anyway let's disable LSan's at_exit
check for the dbus.service to get rid of this error.
NULLSTR_FOREACH expects two terminating NULs, but the joined string
for extension-release.d only had the canonical one.
Use a placeholder when joining and fix it manually.
Given these files are part of procfs, let's use the correct API calls
for reading them.
This changes one occasion of read_one_line_file() to
read_full_virtual_file(), which superficially is a different thing, but
shouldn't actually be a difference, since sysctls can't be longer than
4K anyway, and the piecemeal logic behind read_one_line_file() cannot
work with the special semantics of procfs anyway.
It's so similar to copy_access(), hence let's move it over and rename it
in similar style to the rest of the functions.
No change in behaviour, just moving things over.
This reverts behaviour of systemd-run's unit name generation to the
status quo ante of #18871: we chop off the ":1." prefix if we can.
However, to address the issue that the unique name can overrun we then
do what #18871 did as fallback: only chop off the ":" prefix.
This way we should have pretty names that look like they always looked
in the common case, but in the case of a unique name overrun we still
will have names that work.
Follow-up for #18871
REMOVE_CHMOD is necessary to remove files/dirs that are owned by us but
have an access mode that would not allow us to remove them. In generic
destructor calls for use with `_cleanup_` that are "fire-and-forget"
style we should make use of that, to maximize the chance we can actually
remove the files/dirs.
(Also, add in REMOVE_MISSING_OK. Just because prettier, we ignore the
return codes anyway, but it' a bit nicer to ignore a bit fewer errors.)
