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fix: syscall review bugfix 

close: #149BPF
Signed-off-by: mucor <mucorwang@gmail.com>
This commit is contained in:
mucor 2021-09-09 11:48:17 +08:00
parent 19b39b1bff
commit 214f44e935
4 changed files with 74 additions and 26 deletions
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7
fs/jffs2/src/vfs_jffs2.c
View File

@ -686,7 +686,6 @@ int VfsJffs2Symlink(struct Vnode *parentVnode, struct Vnode **newVnode, const ch
ssize_t VfsJffs2Readlink(struct Vnode *vnode, char *buffer, size_t bufLen)
{
ssize_t ret = 0;
struct jffs2_inode *inode = NULL;
struct jffs2_inode_info *f = NULL;
ssize_t targetLen;
@ -705,14 +704,12 @@ ssize_t VfsJffs2Readlink(struct Vnode *vnode, char *buffer, size_t bufLen)
cnt = (bufLen - 1) < targetLen ? (bufLen - 1) : targetLen;
if (LOS_CopyFromKernel(buffer, bufLen, (const char *)f->target, cnt) != 0) {
cnt = 0;
ret = -EFAULT;
LOS_MuxUnlock(&g_jffs2FsLock);
return -EFAULT;
}
buffer[cnt] = '\0';
LOS_MuxUnlock(&g_jffs2FsLock);
if (ret < 0) {
return ret;
}
return cnt;
}

4
fs/vfs/operation/vfs_procfd.c
View File

@ -59,10 +59,6 @@ void FileTableUnLock(struct fd_table_s *fdt)
static int AssignProcessFd(const struct fd_table_s *fdt, int minFd)
{
if (fdt == NULL) {
return VFS_ERROR;
}
if (minFd >= fdt->max_fds) {
set_errno(EINVAL);
return VFS_ERROR;

1
fs/vfs/path_cache.c
View File

@ -128,6 +128,7 @@ struct PathCache *PathCacheAlloc(struct Vnode *parent, struct Vnode *vnode, cons
ret = strncpy_s(pc->name, len + 1, name, len);
if (ret != LOS_OK) {
free(pc);
return NULL;
}

88
syscall/fs_syscall.c
View File

@ -450,8 +450,16 @@ OUT:
int SysSymlink(const char *target, const char *linkpath)
{
int ret;
char *targetRet = NULL;
char *pathRet = NULL;
if (target != NULL) {
ret = UserPathCopy(target, &targetRet);
if (ret != 0) {
goto OUT;
}
}
if (linkpath != NULL) {
ret = UserPathCopy(linkpath, &pathRet);
if (ret != 0) {
@ -459,7 +467,7 @@ int SysSymlink(const char *target, const char *linkpath)
}
}
ret = symlink(target, pathRet);
ret = symlink(targetRet, pathRet);
if (ret < 0) {
ret = -get_errno();
}
@ -468,6 +476,10 @@ OUT:
if (pathRet != NULL) {
(void)LOS_MemFree(OS_SYS_MEM_ADDR, pathRet);
}
if (targetRet != NULL) {
(void)LOS_MemFree(OS_SYS_MEM_ADDR, targetRet);
}
return ret;
}
@ -606,6 +618,7 @@ int SysMount(const char *source, const char *target, const char *filesystemtype,
int ret;
char *sourceRet = NULL;
char *targetRet = NULL;
char *dataRet = NULL;
char fstypeRet[FILESYSTEM_TYPE_MAX + 1] = {0};
if (!IsCapPermit(CAP_FS_MOUNT)) {
@ -642,7 +655,14 @@ int SysMount(const char *source, const char *target, const char *filesystemtype,
#endif
}
ret = mount(sourceRet, targetRet, (filesystemtype ? fstypeRet : NULL), mountflags, data);
if (data != NULL) {
ret = UserPathCopy(data, &dataRet);
if (ret != 0) {
goto OUT;
}
}
ret = mount(sourceRet, targetRet, (filesystemtype ? fstypeRet : NULL), mountflags, dataRet);
if (ret < 0) {
ret = -get_errno();
}
@ -654,6 +674,9 @@ OUT:
if (targetRet != NULL) {
(void)LOS_MemFree(OS_SYS_MEM_ADDR, targetRet);
}
if (dataRet != NULL) {
(void)LOS_MemFree(OS_SYS_MEM_ADDR, dataRet);
}
return ret;
}
@ -1327,9 +1350,12 @@ ssize_t SysReadv(int fd, const struct iovec *iov, int iovcnt)
/* Process fd convert to system global fd */
fd = GetAssociatedSystemFd(fd);
if ((iov == NULL) || (iovcnt <= 0) || (iovcnt > IOV_MAX)) {
ret = vfs_readv(fd, iov, iovcnt, NULL);
return -get_errno();
if ((iov == NULL) || (iovcnt < 0) || (iovcnt > IOV_MAX)) {
return -EINVAL;
}
if (iovcnt == 0) {
return 0;
}
ret = UserIovCopy(&iovRet, iov, iovcnt, &valid_iovcnt);
@ -1363,6 +1389,11 @@ ssize_t SysWritev(int fd, const struct iovec *iov, int iovcnt)
if ((iovcnt < 0) || (iovcnt > IOV_MAX)) {
return -EINVAL;
}
if (iovcnt == 0) {
return 0;
}
if (iov == NULL) {
return -EFAULT;
}
@ -1545,21 +1576,26 @@ char *SysGetcwd(char *buf, size_t n)
{
char *ret = NULL;
char *bufRet = NULL;
size_t bufLen = n;
int retVal;
bufRet = (char *)LOS_MemAlloc(OS_SYS_MEM_ADDR, n);
if (bufLen > PATH_MAX) {
bufLen = PATH_MAX;
}
bufRet = (char *)LOS_MemAlloc(OS_SYS_MEM_ADDR, bufLen);
if (bufRet == NULL) {
return (char *)(intptr_t)-ENOMEM;
}
(void)memset_s(bufRet, n, 0, n);
(void)memset_s(bufRet, bufLen, 0, bufLen);
ret = getcwd((buf ? bufRet : NULL), n);
ret = getcwd((buf ? bufRet : NULL), bufLen);
if (ret == NULL) {
(void)LOS_MemFree(OS_SYS_MEM_ADDR, bufRet);
return (char *)(intptr_t)-get_errno();
}
retVal = LOS_ArchCopyToUser(buf, bufRet, n);
retVal = LOS_ArchCopyToUser(buf, bufRet, bufLen);
if (retVal != 0) {
(void)LOS_MemFree(OS_SYS_MEM_ADDR, bufRet);
return (char *)(intptr_t)-EFAULT;
@ -1749,6 +1785,14 @@ int SysSymlinkat(const char *target, int dirfd, const char *linkpath)
{
int ret;
char *pathRet = NULL;
char *targetRet = NULL;
if (target != NULL) {
ret = UserPathCopy(target, &targetRet);
if (ret != 0) {
goto OUT;
}
}
if (linkpath != NULL) {
ret = UserPathCopy(linkpath, &pathRet);
@ -1762,7 +1806,7 @@ int SysSymlinkat(const char *target, int dirfd, const char *linkpath)
dirfd = GetAssociatedSystemFd(dirfd);
}
ret = symlinkat(target, dirfd, pathRet);
ret = symlinkat(targetRet, dirfd, pathRet);
if (ret < 0) {
ret = -get_errno();
}
@ -1771,6 +1815,10 @@ OUT:
if (pathRet != NULL) {
(void)LOS_MemFree(OS_SYS_MEM_ADDR, pathRet);
}
if (targetRet != NULL) {
(void)LOS_MemFree(OS_SYS_MEM_ADDR, targetRet);
}
return ret;
}
@ -1924,9 +1972,12 @@ ssize_t SysPreadv(int fd, const struct iovec *iov, int iovcnt, long loffset, lon
/* Process fd convert to system global fd */
fd = GetAssociatedSystemFd(fd);
if ((iov == NULL) || (iovcnt <= 0) || (iovcnt > IOV_MAX)) {
ret = preadv(fd, iov, iovcnt, offsetflag);
return -get_errno();
if ((iov == NULL) || (iovcnt < 0) || (iovcnt > IOV_MAX)) {
return -EINVAL;
}
if (iovcnt == 0) {
return 0;
}
ret = UserIovCopy(&iovRet, iov, iovcnt, &valid_iovcnt);
@ -1959,9 +2010,12 @@ ssize_t SysPwritev(int fd, const struct iovec *iov, int iovcnt, long loffset, lo
/* Process fd convert to system global fd */
fd = GetAssociatedSystemFd(fd);
if ((iov == NULL) || (iovcnt <= 0) || (iovcnt > IOV_MAX)) {
ret = pwritev(fd, iov, iovcnt, offsetflag);
return -get_errno();
if ((iov == NULL) || (iovcnt < 0) || (iovcnt > IOV_MAX)) {
return -EINVAL;
}
if (iovcnt == 0) {
return 0;
}
ret = UserIovCopy(&iovRet, iov, iovcnt, &valid_iovcnt);
@ -2480,7 +2534,7 @@ int SysPpoll(struct pollfd *fds, nfds_t nfds, const struct timespec *tmo_p, cons
timeout = (tmo_p == NULL) ? -1 : (tmo_p->tv_sec * OS_SYS_US_PER_MS + tmo_p->tv_nsec / OS_SYS_NS_PER_MS);
if (timeout & 0x80000000) {
ret = -EINVAL;
return ret;
return ret;
}
setl.sig[0] = *sigMask;
OsSigprocMask(SIG_SETMASK, &setl, &origMask);