android_system_sepolicy/private/crash_dump.te
Jeff Vander Stoep 60bb29fcdf crash_dump: suppress devpts denials
The following denial caused a presubmit failure:
06-15 15:16:24.176   956   956 I auditd  : type=1400 audit(0.0:4): avc:
denied { read write } for comm="crash_dump64" path="/dev/pts/3"
dev="devpts" ino=6 scontext=u:r:crash_dump:s0
tcontext=u:object_r:devpts:s0 tclass=chr_file permissive=0

Suppress these denials. They are not needed by crash_dump and are only
caused by the default behavior of sharing FDs across exec.

Test: build
Change-Id: I183f7a54e6b807fdf46b04d67dd4b819d4f0e507
2019-03-19 04:05:51 +00:00

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typeattribute crash_dump coredomain;
# Crash dump does not need to access devices passed across exec().
dontaudit crash_dump { devpts dev_type }:chr_file { read write };
allow crash_dump {
domain
-apexd
-bpfloader
-crash_dump
-init
-kernel
-keystore
-llkd
-logd
-ueventd
-vendor_init
-vold
}:process { ptrace signal sigchld sigstop sigkill };
userdebug_or_eng(`
allow crash_dump { apexd llkd logd vold }:process { ptrace signal sigchld sigstop sigkill };
')
###
### neverallow assertions
###
# ptrace neverallow assertions are spread throughout the other policy
# files, so we avoid adding redundant assertions here
neverallow crash_dump {
apexd
userdebug_or_eng(`-apexd')
bpfloader
init
kernel
keystore
llkd
userdebug_or_eng(`-llkd')
logd
userdebug_or_eng(`-logd')
ueventd
vendor_init
vold
userdebug_or_eng(`-vold')
}:process { signal sigstop sigkill };
neverallow crash_dump self:process ptrace;
neverallow crash_dump gpu_device:chr_file *;