This change moves logd's capabilities from being file based to being set
by init through ambient capabilities.
Bug: 62845925
Test: sailfish:/ # grep Cap /proc/`pidof logd`/status
CapInh: 0000000000000000
CapPrm: 0000000440000000
CapEff: 0000000440000000
CapBnd: 0000000440000040
CapAmb: 0000000000000000
$ capsh --decode=0x440000040
0x440000040=cap_setgid,cap_audit_control,cap_syslog
Test: liblog-unit-tests, logd-unit-tests, logcat-unit-tests
Change-Id: I28c7c4ad37ad5eafd399aef78c303ce31298a9ef
Now that creating a symlink in init automatically sets its
context, we do not need to call restorecon manually.
Bug: 69965807
Test: Booted device and tested wifi and camera.
Change-Id: I0863198f2c2bfce79566b5320c7ef035698f3afb
Tell init to set SO_PASSCRED on the socket before bind() and handoff.
Test: gtest logd-unit-test --gtest_filter=logd.statistics right after boot
Bug: 37985222
Change-Id: I318969ee3241834e5326233aabd97e52ef505969
Refine DAC security surrounding logd.daemon worker thread and add a
positive test for logd failure to access /data/system/packages.list.
- Add AID_PACKAGE_INFO to groups of worker thread.
- Move AID_SYSTEM to groups, setgid to AID_LOGD.
- Do not drop capabilities until after setting the uid and gids.
- Add a test that is part of logd.statistics test to check when
packagelistparser appears broken.
- If /data/system/packages.list is encrypted, ensure we do not pick
up the existing inode to ensure strong positive when finding access
problems.
- Replace all occurrences of NULL with nullptr in gTest code for
compliance with best practices.
Test: gTest logd-unit-tests --gtest_filter=logd.statistics
(expect consistent failure, later CLs fix)
Bug: 37751120
Bug: 36645158
Change-Id: I01b26fe5e25203246ae432d272c8daa9c07cab54
Will register a new event tag by name and format, and return an
event-log-tags format response with the newly allocated tag.
If format is not specified, then nothing will be recorded, but
a pre-existing named entry will be listed. If name and format are
not specified, list all dynamic entries. If name=* list all
event log tag entries.
Stickiness through logd crash will be managed with the tmpfs file
/dev/event-log-tags and through a reboot with add_tag entries in
the pmsg last logcat event log. On debug builds we retain a
/data/misc/logd/event-log-tags file that aids stickiness and that
can be picked up by the bugreport.
If we detect truncation damage to /dev/event-log-tags, or to
/data/misc/logd/event-log-tags, rebuild file with a new first line
signature incorporating the time so mmap'd readers of the file can
detect the possible change in shape and order.
Manual testing:
Make sure nc (netcat) is built for the target platform on the host:
$ m nc
Then the following can be used to issue a request on the platform:
$ echo -n 'getEventTag name=<name> format="<format>"\0EXIT\0' |
> nc -U /dev/socket/logd
Test: gTest logd-unit-test --gtest_filter=getEventTag*
Bug: 31456426
Change-Id: I5dacc5f84a24d52dae09cca5ee1a3a9f9207f06d
Setup and then collect from the environment /proc/kmsg and /dev/kmsg
file descriptors. Do not do so for logcat --reinit.
Test: gTest logd-unit-tests, liblog-unit-tests and logcat-unit-tests
Bug: 32450474
Change-Id: Ied537ca561fcd4e71a9ad9c57398a23ba23f6ced
Add the following mount options to the /proc filesystem:
hidepid=2,gid=3009
This change blocks /proc access unless you're in group 3009
(aka AID_READPROC).
Please see
https://github.com/torvalds/linux/blob/master/Documentation/filesystems/proc.txt
for documentation on the hidepid option.
hidepid=2 is preferred over hidepid=1 since it leaks less information
and doesn't generate SELinux ptrace denials when trying to access
/proc without being in the proper group.
Add AID_READPROC to processes which need to access /proc entries for
other UIDs.
Bug: 23310674
Change-Id: I22bb55ff7b80ff722945e224845215196f09dafa
