shaba/systemd-stable
1
1
Fork 0
mirror of https://github.com/systemd/systemd-stable.git synced 2025-03-08 20:58:20 +03:00
Code

test: wrap ls and stat to make it work w/ sanitizers in specific cases

Browse Source 
When `/etc/nsswitch.conf` uses `systemd` together with `[SUCCESS=merge]`,
`ls -l` will pull in `libnss_systemd` causing `SIGABRT`, as `ls` is not
instrumented (by default):

```
-bash-5.1# strace -f -e %file ls -l /dev
execve("/usr/bin/ls", ["ls", "-l", "/dev"], 0x7ffc3bb211c8 /* 24 vars*/) = 0
...
openat(AT_FDCWD, "/etc/passwd", O_RDONLY|O_CLOEXEC) = 3
newfstatat(3, "", {st_mode=S_IFREG|0644, st_size=1896, ...}, AT_EMPTY_PATH) = 0
newfstatat(AT_FDCWD, "/etc/nsswitch.conf", {st_mode=S_IFREG|0644, st_size=359, ...}, 0) = 0
openat(AT_FDCWD, "/etc/group", O_RDONLY|O_CLOEXEC) = 3
newfstatat(3, "", {st_mode=S_IFREG|0644, st_size=965, ...}, AT_EMPTY_PATH) = 0
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
newfstatat(3, "", {st_mode=S_IFREG|0644, st_size=10779, ...}, AT_EMPTY_PATH) = 0
openat(AT_FDCWD, "/usr/lib/libnss_systemd.so.2", O_RDONLY|O_CLOEXEC) = 3
newfstatat(3, "", {st_mode=S_IFREG|0755, st_size=16195176, ...}, AT_EMPTY_PATH) = 0
openat(AT_FDCWD, "/usr/lib/libasan.so.8", O_RDONLY|O_CLOEXEC) = 3
...
readlink("/proc/self/exe", "/usr/bin/ls", 4096) = 11
open("/proc/self/cmdline", O_RDONLY)    = 3
open("/proc/self/environ", O_RDONLY)    = 3
==620==ASan runtime does not come first in initial library list; you should either link runtime to your application or manually preload it with LD_PRELOAD.
--- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=620, si_uid=0} ---
+++ killed by SIGABRT (core dumped) +++
Aborted (core dumped)
```

This also happens with `stat`. Let's add both `ls` and `stat` to the "wrap list"
to work around this.

Spotted on Arch Linux.

(cherry picked from commit 5ad15138458b4f2957bd9d2bc2c8e3c9afe99337)
This commit is contained in:
Frantisek Sumsal 2022-09-28 17:01:55 +02:00 committed by Luca Boccassi
parent db14b371df
commit 6258394c1e
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
test/test-functions
View File

@ -2467,8 +2467,10 @@ inst_binary() {
# Same as above, but we need to wrap certain libraries unconditionally
#
# getent, login, su, useradd, userdel - dlopen()s (not only) systemd's PAM modules
# ls, stat - pulls in nss_systemd with certain options (like ls -l) when
# nsswitch.conf uses [SUCCESS=merge] (like on Arch Linux)
# tar - called by machinectl in TEST-25
if get_bool "$IS_BUILT_WITH_ASAN" && [[ "$bin" =~ /(getent|login|su|tar|useradd|userdel)$ ]]; then
if get_bool "$IS_BUILT_WITH_ASAN" && [[ "$bin" =~ /(getent|login|ls|stat|su|tar|useradd|userdel)$ ]]; then
wrap_binary=1
fi