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Set the limit, the cursor cannot be set to a negative number

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xujunjun
2022-01-11 15:10:45 +08:00
committed by Christopher Haster
parent ead50807f1
commit b898977fd8
1 changed files with 11 additions and 2 deletions
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13
lfs.c
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@@ -3066,9 +3066,18 @@ static lfs_soff_t lfs_file_rawseek(lfs_t *lfs, lfs_file_t *file,
if (whence == LFS_SEEK_SET) { if (whence == LFS_SEEK_SET) {
npos = off; npos = off;
} else if (whence == LFS_SEEK_CUR) { } else if (whence == LFS_SEEK_CUR) {
npos = file->pos + off; if ((lfs_soff_t)file->pos + off < 0) {
return LFS_ERR_INVAL;
} else {
npos = file->pos + off;
}
} else if (whence == LFS_SEEK_END) { } else if (whence == LFS_SEEK_END) {
npos = lfs_file_rawsize(lfs, file) + off; lfs_soff_t res = lfs_file_rawsize(lfs, file) + off;
if (res < 0) {
return LFS_ERR_INVAL;
} else {
npos = res;
}
} }
if (npos > lfs->file_max) { if (npos > lfs->file_max) {