diff options
Diffstat (limited to 'libc')
| -rw-r--r-- | libc/SECCOMP_ALLOWLIST_COMMON.TXT | 4 | ||||
| -rw-r--r-- | libc/bionic/spawn.cpp | 5 |
2 files changed, 9 insertions, 0 deletions
diff --git a/libc/SECCOMP_ALLOWLIST_COMMON.TXT b/libc/SECCOMP_ALLOWLIST_COMMON.TXT index 6650d7e32..0366fdf0f 100644 --- a/libc/SECCOMP_ALLOWLIST_COMMON.TXT +++ b/libc/SECCOMP_ALLOWLIST_COMMON.TXT @@ -31,6 +31,8 @@ int seccomp:seccomp(unsigned int operation, unsigned int flags, void *args) all int open:open(const char*, int, ...) arm,x86,x86_64 int stat64:stat64(const char*, struct stat64*) arm,x86 ssize_t readlink:readlink(const char*, char*, size_t) arm,x86,x86_64 +# Needed by ubsan in T? (http://b/229989971) +int stat(const char*, struct stat*) arm,x86,x86_64 # # Useful new syscalls which we don't yet use in bionic. @@ -74,3 +76,5 @@ int futex_time64(int*, int, int, const timespec64*, int*, int) lp32 int sched_rr_get_interval_time64(pid_t, timespec64*) lp32 # Since Linux 5.4, not in glibc. Probed for and conditionally used by ART. int userfaultfd(int) all +# Since Linux 5.9, used by POSIX_SPAWN_CLOEXEC_DEFAULT +int close_range(unsigned int, unsigned int, int) all diff --git a/libc/bionic/spawn.cpp b/libc/bionic/spawn.cpp index 314a05669..59f763138 100644 --- a/libc/bionic/spawn.cpp +++ b/libc/bionic/spawn.cpp @@ -30,10 +30,12 @@ #include <errno.h> #include <fcntl.h> +#include <linux/close_range.h> #include <signal.h> #include <stdlib.h> #include <string.h> #include <sys/resource.h> +#include <sys/syscall.h> #include <unistd.h> #include <android/fdsan.h> @@ -49,6 +51,9 @@ static int set_cloexec(int i) { // mark all open fds except stdin/out/err as close-on-exec static int cloexec_except_stdioe() { + // requires 5.11+ or ACK 5.10-T kernel, otherwise returns ENOSYS or EINVAL + if (!syscall(SYS_close_range, 3, ~0U, CLOSE_RANGE_CLOEXEC)) return 0; + // unfortunately getrlimit can lie: // - both soft and hard limits can be lowered to 0, with fds still open, so it can underestimate // - in practice it usually is some really large value (like 32K or more) |