From: Mirsad Goran Todorovac mirsad.todorovac@alu.unizg.hr Date: Tue, 3 Jan 2023 11:28:19 +0100

Hi all,

There is a minor issue that prevents self test net/af_unix to run on my platform:

Hi,

Thanks for the report and fix.

The diff looks good. Could you post a patch formally following these?

https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/tree/Doc... https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/tree/Doc...

Subject should be like

[PATCH net v1] af_unix: Correct addr size for connect() in test_unix_oob.c.

and please add this tag just before your Signed-off-by tag.

Fixes: 314001f0bf92 ("af_unix: Add OOB support")

# ./test_unix_oob Connect failed: No such file or directory Terminated

Tracing reveals that bind tried to open a shorter AF_UNIX socket address:

s/bind/connect/

# strace -f ./test_unix_oob . . . socket(AF_UNIX, SOCK_STREAM, 0) = 3 getpid() = 453059 unlink("unix_oob_453059") = -1 ENOENT (No such file or directory) bind(3, {sa_family=AF_UNIX, sun_path="unix_oob_453059"}, 110) = 0 pipe2([4, 5], 0) = 0 listen(3, 1) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fa6a6577a10) = 453060 rt_sigaction(SIGURG, {sa_handler=0x5601e2d014c9, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fa6a623bcf0}, NULL, 8) = 0 write(5, "S", 1) = 1 accept(3, strace: Process 453060 attached <unfinished ...> [pid 453060] set_robust_list(0x7fa6a6577a20, 24) = 0 [pid 453060] socket(AF_UNIX, SOCK_STREAM, 0) = 6 [pid 453060] read(4, "S", 5) = 1 [pid 453060] connect(6, {sa_family=AF_UNIX, sun_path="unix_oob_45305"}, 16) = -1 ENOENT (No such file or directory) . . .

NOTE: bind used UNIX_AF addr "unix_oob_453059", while producer tries to connect to "unix_oob_45305".

When pids were up to 5 digits it probably did not manifest, but logically the size of the consumer_addr is sizeof(struct sockaddr_un).

Please find the patch attached:

Thanks, Mirsad

---

diff --git a/tools/testing/selftests/net/af_unix/test_unix_oob.c b/tools/testing/selftests/net/af_unix/test_unix_oob.c index b57e91e1c3f2..7ea733239cd9 100644 --- a/tools/testing/selftests/net/af_unix/test_unix_oob.c +++ b/tools/testing/selftests/net/af_unix/test_unix_oob.c @@ -124,7 +124,7 @@ void producer(struct sockaddr_un *consumer_addr)

wait_for_signal(pipefd[0]); if (connect(cfd, (struct sockaddr *)consumer_addr,

•      sizeof(struct sockaddr)) != 0) {
  

•      sizeof(struct sockaddr_un)) != 0) {
  

While at it, please fix the indent.

perror("Connect failed");
kill(0, SIGTERM);
exit(1);

-- Mirsad Goran Todorovac Sistem inženjer Grafički fakultet | Akademija likovnih umjetnosti Sveučilište u Zagrebu -- System engineer Faculty of Graphic Arts | Academy of Fine Arts University of Zagreb, Republic of Croatia The European Union