build(deps): bump actions/checkout from 2 to 3 - #1
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Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 3. - [Release notes](https://github.com/actions/checkout/releases) - [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md) - [Commits](actions/checkout@v2...v3) --- updated-dependencies: - dependency-name: actions/checkout dependency-type: direct:production update-type: version-update:semver-major ... Signed-off-by: dependabot[bot] <support@github.com>
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fuzz-lxc-cgroup-init currently fails for me with the input
```
lxc.cap.keep=0
```
with this report:
```
==640655==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x833c77 in parse_cap /src/lxc/san_build/../src/lxc/conf.c:3161:6
#1 0xaa5fd6 in add_cap_entry /src/lxc/san_build/../src/lxc/confile.c:2462:9
#2 0x9eb69c in set_config_cap_keep /src/lxc/san_build/../src/lxc/confile.c:2503:8
#3 0x974a76 in parse_line /src/lxc/san_build/../src/lxc/confile.c:3115:9
lxc#4 0xea8cac in lxc_file_for_each_line_mmap /src/lxc/san_build/../src/lxc/parse.c:123:9
lxc#5 0x9700a1 in lxc_config_read /src/lxc/san_build/../src/lxc/confile.c:3192:9
lxc#6 0x4a3b50 in LLVMFuzzerTestOneInput /src/lxc/san_build/../src/tests/fuzz-lxc-cgroup-init.c:40:8
lxc#7 0x10556e3 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:611:15
lxc#8 0x1041372 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:324:6
lxc#9 0x1046bbc in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:860:9
lxc#10 0x106f7b2 in main /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:20:10
lxc#11 0x7ffff7bc00b2 in __libc_start_main /build/glibc-sMfBJT/glibc-2.31/csu/../csu/libc-start.c:308:16
lxc#12 0x420a9d in _start (/home/fuzzer/oss-fuzz/build/out/lxc/fuzz-lxc-cgroup-init+0x420a9d)
Uninitialized value was created by an allocation of 'last_cap' in the stack frame of function 'parse_cap'
#0 0x832e30 in parse_cap /src/lxc/san_build/../src/lxc/conf.c:3131
```
The reason is that without libcap we parse_cap ends up comparing two
uninitialized values. See the snippet below:
```
int parse_cap(const char *cap_name, __u32 *cap)
{
int ret;
unsigned int res;
__u32 last_cap;
[...]
ret = lxc_caps_last_cap(&last_cap); // NOTE: 1. Call here.
if (ret) // Not taken as dummy lxc_caps_last_cap returned 0.
return -1;
if ((__u32)res > last_cap) // last_cap is uninitialized.
return -1;
*cap = (__u32)res;
return 0;
}
```
Root cause seems to be that the dummy `lxc_caps_last_cap` returns 0 but
doesn't set the last_cap value. This patch just returns -1 as an error code
to avoid the uninitialized read.
Note: When reproducing the bug you need to compile with O0 and *not* with O1
otherwise you will not see the report.
Signed-off-by: Raphael Isemann <teemperor@gmail.com>
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Bumps actions/checkout from 2 to 3.
Release notes
Sourced from actions/checkout's releases.
... (truncated)
Changelog
Sourced from actions/checkout's changelog.
... (truncated)
Commits
2541b12Prepare changelog for v3.0.2. (#777)0ffe6f9Add set-safe-directory input to allow customers to take control. (#770)dcd71f6Enforce safe directory (#762)add3486Patch to fix the dependbot alert. (#744)5126516Bump minimist from 1.2.5 to 1.2.6 (#741)d50f8eaAdd v3.0 release information to changelog (#740)2d1c119update test workflows to checkout v3 (#709)a12a394update readme for v3 (#708)8f9e05eUpdate to node 16 (#689)Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
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