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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-03-12 15:05:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-03-12 15:05:27 -0700 |
| commit | 7f1a2774098bfdc54f9c94901665ddd81ecbb3cc (patch) | |
| tree | f8ccfd4735166c24b1efdaacaa319291c6c66f4f /samples | |
| parent | 216532e147b2fee6ee830f4a844bbc3cbb9137af (diff) | |
| parent | 56af94aace8a0489fb1a32fd6f1cf0c548fe3911 (diff) | |
| download | lwn-7f1a2774098bfdc54f9c94901665ddd81ecbb3cc.tar.gz lwn-7f1a2774098bfdc54f9c94901665ddd81ecbb3cc.zip | |
Merge tag 'seccomp-v6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull seccomp updates from Kees Cook:
"There are no core kernel changes here; it's entirely selftests and
samples:
- Improve reliability of selftests (Terry Tritton, Kees Cook)
- Fix strict-aliasing warning in samples (Arnd Bergmann)"
* tag 'seccomp-v6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
samples: user-trap: fix strict-aliasing warning
selftests/seccomp: Pin benchmark to single CPU
selftests/seccomp: user_notification_addfd check nextfd is available
selftests/seccomp: Change the syscall used in KILL_THREAD test
selftests/seccomp: Handle EINVAL on unshare(CLONE_NEWPID)
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/seccomp/user-trap.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/samples/seccomp/user-trap.c b/samples/seccomp/user-trap.c index 20291ec6489f..a23fec357b5d 100644 --- a/samples/seccomp/user-trap.c +++ b/samples/seccomp/user-trap.c @@ -33,6 +33,7 @@ static int send_fd(int sock, int fd) { struct msghdr msg = {}; struct cmsghdr *cmsg; + int *fd_ptr; char buf[CMSG_SPACE(sizeof(int))] = {0}, c = 'c'; struct iovec io = { .iov_base = &c, @@ -47,7 +48,8 @@ static int send_fd(int sock, int fd) cmsg->cmsg_level = SOL_SOCKET; cmsg->cmsg_type = SCM_RIGHTS; cmsg->cmsg_len = CMSG_LEN(sizeof(int)); - *((int *)CMSG_DATA(cmsg)) = fd; + fd_ptr = (int *)CMSG_DATA(cmsg); + *fd_ptr = fd; msg.msg_controllen = cmsg->cmsg_len; if (sendmsg(sock, &msg, 0) < 0) { @@ -62,6 +64,7 @@ static int recv_fd(int sock) { struct msghdr msg = {}; struct cmsghdr *cmsg; + int *fd_ptr; char buf[CMSG_SPACE(sizeof(int))] = {0}, c = 'c'; struct iovec io = { .iov_base = &c, @@ -79,8 +82,9 @@ static int recv_fd(int sock) } cmsg = CMSG_FIRSTHDR(&msg); + fd_ptr = (int *)CMSG_DATA(cmsg); - return *((int *)CMSG_DATA(cmsg)); + return *fd_ptr; } static int user_trap_syscall(int nr, unsigned int flags) |